======================================
| [   43.638086][   T70] ==================================================================
| [ 43.638610][ T70] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [   43.639027][   T70] Read of size 1 at addr ffff888001dc0cfc by task kworker/u8:1/70
| [   43.639464][   T70]
[   43.640077][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.640778][   T70] Workqueue: netns cleanup_net
[   43.641043][   T70] Call Trace:
[   43.641245][   T70]  <TASK>
[ 43.641416][ T70] dump_stack_lvl (lib/dump_stack.c:107) 
[ 43.641669][ T70] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 43.642031][ T70] ? kobject_put (lib/kobject.c:729) 
[ 43.642283][ T70] print_report (mm/kasan/report.c:489) 
[ 43.642521][ T70] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) 
[ 43.642797][ T70] kasan_report (mm/kasan/report.c:603) 
[ 43.643031][ T70] ? kobject_put (lib/kobject.c:729) 
[ 43.643276][ T70] kobject_put (lib/kobject.c:729) 
[ 43.643510][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 43.643763][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.644042][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.644325][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.644566][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 43.644867][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.645134][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.645403][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.645697][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 43.645966][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.646235][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.646570][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 43.646836][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.647103][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.647500][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.647784][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.648060][ T70] kthread (kernel/kthread.c:388) 
[ 43.648302][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.648572][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.648834][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.649092][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   43.669635][   T70] ------------[ cut here ]------------
| [   43.669933][   T70] refcount_t: underflow; use-after-free.
| [ 43.670283][ T70] WARNING: CPU: 2 PID: 70 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [   43.670785][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   43.671667][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.672329][   T70] Workqueue: netns cleanup_net
[ 43.672590][ T70] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 43.672921][ T70] Code: f9 82 03 80 fb 01 0f 87 ee 02 b1 01 83 e3 01 0f 85 4d ff ff ff c6 05 9a f9 82 03 01 90 48 c7 c7 20 7a e2 b9 e8 3e 05 2a ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 8c 68 a6 ff e9 b6 fe ff ff
All code
========
   0:	f9                   	stc
   1:	82                   	(bad)
   2:	03 80 fb 01 0f 87    	add    -0x78f0fe05(%rax),%eax
   8:	ee                   	out    %al,(%dx)
   9:	02 b1 01 83 e3 01    	add    0x1e38301(%rcx),%dh
   f:	0f 85 4d ff ff ff    	jne    0xffffffffffffff62
  15:	c6 05 9a f9 82 03 01 	movb   $0x1,0x382f99a(%rip)        # 0x382f9b6
  1c:	90                   	nop
  1d:	48 c7 c7 20 7a e2 b9 	mov    $0xffffffffb9e27a20,%rdi
  24:	e8 3e 05 2a ff       	call   0xffffffffff2a0567
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 2f ff ff ff       	jmp    0xffffffffffffff62
  33:	48 89 df             	mov    %rbx,%rdi
  36:	e8 8c 68 a6 ff       	call   0xffffffffffa668c7
  3b:	e9 b6 fe ff ff       	jmp    0xfffffffffffffef6

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 2f ff ff ff       	jmp    0xffffffffffffff38
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 8c 68 a6 ff       	call   0xffffffffffa6689d
  11:	e9 b6 fe ff ff       	jmp    0xfffffffffffffecc
[   43.674050][   T70] RSP: 0018:ffffc9000050fb98 EFLAGS: 00010282
[   43.674413][   T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb711056f
[   43.674892][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   43.675349][   T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a1f18
[   43.675843][   T70] R10: ffffc9000050f8c7 R11: 205d303754202020 R12: ffff888009652000
[   43.676281][   T70] R13: ffff888009652df8 R14: ffffc9000050fc98 R15: ffff888009652bc0
[   43.676722][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   43.677218][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.677589][   T70] CR2: 00007f09423510e0 CR3: 0000000006342005 CR4: 00000000001706f0
[   43.678026][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.678487][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.678925][   T70] Call Trace:
[   43.679119][   T70]  <TASK>
[ 43.679309][ T70] ? __warn (kernel/panic.c:677) 
[ 43.679549][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 43.679867][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 43.680134][ T70] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 43.680431][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 43.680703][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 43.680970][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 43.681275][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 43.681542][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 43.681864][ T70] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 43.682180][ T70] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 43.682525][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.682780][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.683065][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.683339][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 43.683689][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.683973][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.684232][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.684512][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 43.684782][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.685030][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.685341][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 43.685593][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.685855][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.686227][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.686505][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.686782][ T70] kthread (kernel/kthread.c:388) 
[ 43.687005][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.687263][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.687513][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.687767][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   43.690993][   T70] ------------[ cut here ]------------
| [   43.691358][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 43.691740][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   43.692237][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   43.693101][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.693752][   T70] Workqueue: netns cleanup_net
[ 43.694015][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.694339][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   43.695503][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   43.695829][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   43.696336][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   43.696762][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   43.697183][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009652628
[   43.697645][   T70] R13: ffff888009652df8 R14: ffffc9000050fc98 R15: ffff888009652bc0
[   43.698123][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   43.698649][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.699007][   T70] CR2: 00007f09423510e0 CR3: 0000000006342005 CR4: 00000000001706f0
[   43.699501][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.699963][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.700459][   T70] Call Trace:
[   43.700674][   T70]  <TASK>
[ 43.700840][ T70] ? __warn (kernel/panic.c:677) 
[ 43.701090][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 43.701395][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.701716][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 43.701989][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 43.702289][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 43.702555][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 43.702878][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 43.703132][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.703530][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.703834][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.704141][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.704405][ T70] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 43.704770][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.705074][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.705360][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.705672][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 43.705964][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.706246][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.706557][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 43.706836][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.707116][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.707478][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.707763][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.708041][ T70] kthread (kernel/kthread.c:388) 
[ 43.708272][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.708522][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.708787][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.709047][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   43.853632][   T70] ------------[ cut here ]------------
| [   43.854029][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 43.854471][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   43.855042][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   43.856084][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.856823][   T70] Workqueue: netns cleanup_net
[ 43.857098][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.857534][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   43.858677][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   43.859058][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   43.859489][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   43.859974][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   43.860473][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009a8a628
[   43.860978][   T70] R13: ffff888009a8adf8 R14: ffffc9000050fc98 R15: ffff888009a8abc0
[   43.861467][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[   43.862015][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.862429][   T70] CR2: 00007fc7e7844000 CR3: 000000001eb34005 CR4: 00000000001706f0
[   43.862916][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.863427][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.863884][   T70] Call Trace:
[   43.864092][   T70]  <TASK>
[ 43.864308][ T70] ? __warn (kernel/panic.c:677) 
[ 43.864595][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 43.864906][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.865212][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 43.865480][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 43.865715][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 43.865966][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 43.866249][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 43.866517][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.866801][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.867056][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.867345][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.867615][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.867954][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.868285][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.868616][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.868943][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 43.869294][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.869602][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.869981][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 43.870277][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.870626][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.871061][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.871399][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.871702][ T70] kthread (kernel/kthread.c:388) 
[ 43.872002][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.872323][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.872618][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.872893][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   44.086626][   T70] ------------[ cut here ]------------
| [   44.087128][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 44.087755][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   44.088535][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   44.089931][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.090962][   T70] Workqueue: netns cleanup_net
[ 44.091379][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.091869][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   44.093472][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   44.093987][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   44.094657][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   44.095298][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   44.095923][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800699a628
[   44.096561][   T70] R13: ffff88800699adf8 R14: ffffc9000050fc98 R15: ffff88800699abc0
[   44.097172][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   44.097886][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.098426][   T70] CR2: 00007f00a5f1d000 CR3: 000000001eb34002 CR4: 00000000001706f0
[   44.099105][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.099746][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.100391][   T70] Call Trace:
[   44.100598][   T70]  <TASK>
[ 44.100757][ T70] ? __warn (kernel/panic.c:677) 
[ 44.100977][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 44.101250][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.101532][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 44.101780][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 44.102014][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 44.102274][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 44.102551][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 44.102793][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.103088][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 44.103359][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 44.103691][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 44.103932][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.104189][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 44.104467][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.104738][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 44.105041][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 44.105337][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 44.105592][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 44.105896][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 44.106151][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 44.106442][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.106822][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 44.107107][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 44.107412][ T70] kthread (kernel/kthread.c:388) 
[ 44.107660][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 44.107924][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 44.108181][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 44.108463][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   44.301586][   T70] ------------[ cut here ]------------
| [   44.301962][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 44.302408][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   44.302906][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   44.303788][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.304443][   T70] Workqueue: netns cleanup_net
[ 44.304724][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.305050][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   44.306233][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   44.306596][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   44.307062][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   44.307524][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   44.307992][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006102628
[   44.308467][   T70] R13: ffff888006102df8 R14: ffffc9000050fc98 R15: ffff888006102bc0
[   44.308955][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   44.309497][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.309879][   T70] CR2: 00007f505d1ee270 CR3: 000000001eb34002 CR4: 00000000001706f0
[   44.310382][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.310857][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.311397][   T70] Call Trace:
[   44.311605][   T70]  <TASK>
[ 44.311811][ T70] ? __warn (kernel/panic.c:677) 
[ 44.312077][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 44.312396][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.312750][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 44.313030][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 44.313292][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 44.313547][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 44.313828][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 44.314070][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 44.314355][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 44.314608][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 44.314894][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 44.315178][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.315512][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 44.315797][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.316094][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 44.316440][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 44.316729][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 44.317036][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 44.317369][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 44.317666][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 44.318005][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.318415][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 44.318745][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 44.319059][ T70] kthread (kernel/kthread.c:388) 
[ 44.319338][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 44.319635][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 44.319912][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 44.320258][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   65.040608][   T70] ------------[ cut here ]------------
| [   65.040919][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 65.041312][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   65.041809][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   65.042792][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.043520][   T70] Workqueue: netns cleanup_net
[ 65.043784][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.044146][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   65.045273][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   65.045631][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   65.046089][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   65.046567][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   65.047013][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009cea628
[   65.047511][   T70] R13: ffff888009ceadf8 R14: ffffc9000050fc98 R15: ffff888009ceabc0
[   65.047979][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   65.048507][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.048867][   T70] CR2: 00007fa9f7f59270 CR3: 000000001eb34003 CR4: 00000000001706f0
[   65.049316][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   65.049784][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   65.050217][   T70] Call Trace:
[   65.050414][   T70]  <TASK>
[ 65.050582][ T70] ? __warn (kernel/panic.c:677) 
[ 65.050815][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 65.051100][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.051430][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 65.051720][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 65.051993][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 65.052278][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 65.052586][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 65.052867][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.053205][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 65.053479][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 65.053802][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 65.054076][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.054353][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 65.054627][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.054899][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 65.055209][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 65.055497][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 65.055754][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 65.056058][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 65.056338][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 65.056603][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 65.056959][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.057260][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.057562][ T70] kthread (kernel/kthread.c:388) 
[ 65.057795][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.058053][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 65.058312][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.058605][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   65.236459][   T70] ------------[ cut here ]------------
| [   65.236774][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 65.237164][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   65.237678][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   65.238564][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.239333][   T70] Workqueue: netns cleanup_net
[ 65.239633][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.239987][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   65.241174][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   65.241554][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   65.242090][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   65.242564][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   65.243053][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88802076a628
[   65.243561][   T70] R13: ffff88802076adf8 R14: ffffc9000050fc98 R15: ffff88802076abc0
[   65.244043][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   65.244643][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.245047][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34002 CR4: 00000000001706f0
[   65.245546][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   65.246016][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   65.246475][   T70] Call Trace:
[   65.246658][   T70]  <TASK>
[ 65.246820][ T70] ? __warn (kernel/panic.c:677) 
[ 65.247048][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 65.247312][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.247595][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 65.247847][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 65.248084][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 65.248358][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 65.248639][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 65.248881][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.249158][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 65.249420][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 65.249728][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 65.250001][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.250322][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 65.250626][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.250929][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 65.251248][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 65.251554][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 65.251834][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 65.252173][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 65.252472][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 65.252763][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 65.253168][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.253481][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.253808][ T70] kthread (kernel/kthread.c:388) 
[ 65.254055][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.254327][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 65.254606][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.254893][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   65.430457][   T70] ------------[ cut here ]------------
| [   65.430771][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 65.431147][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   65.431765][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   65.432764][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.433459][   T70] Workqueue: netns cleanup_net
[ 65.433794][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.434110][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   65.435199][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   65.435575][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   65.436041][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   65.436499][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   65.436963][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009e5a628
[   65.437441][   T70] R13: ffff888009e5adf8 R14: ffffc9000050fc98 R15: ffff888009e5abc0
[   65.437905][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[   65.438411][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.438806][   T70] CR2: 00007f79062812a8 CR3: 000000001eb34003 CR4: 00000000001706f0
[   65.439284][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   65.439740][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   65.440186][   T70] Call Trace:
[   65.440393][   T70]  <TASK>
[ 65.440586][ T70] ? __warn (kernel/panic.c:677) 
[ 65.440854][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 65.441152][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.441466][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 65.441758][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 65.442050][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 65.442331][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 65.442626][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 65.442893][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.443225][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 65.443527][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 65.443851][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 65.444122][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.444427][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 65.444739][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.445031][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 65.445346][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 65.445649][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 65.445941][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 65.446240][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 65.446505][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 65.446758][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 65.447107][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.447390][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.447662][ T70] kthread (kernel/kthread.c:388) 
[ 65.447887][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.448214][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 65.448482][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.448772][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   65.631511][   T70] ------------[ cut here ]------------
| [   65.631875][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 65.632290][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   65.632801][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   65.633731][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.634526][   T70] Workqueue: netns cleanup_net
[ 65.634841][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.635227][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   65.636350][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   65.636716][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   65.637200][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   65.637682][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   65.638172][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880083e2628
[   65.638644][   T70] R13: ffff8880083e2df8 R14: ffffc9000050fc98 R15: ffff8880083e2bc0
[   65.639119][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   65.639661][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.640062][   T70] CR2: 00007efc2baf0270 CR3: 000000001eb34005 CR4: 00000000001706f0
[   65.640540][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   65.641009][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   65.641489][   T70] Call Trace:
[   65.641668][   T70]  <TASK>
[ 65.641860][ T70] ? __warn (kernel/panic.c:677) 
[ 65.642097][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 65.642388][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.642694][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 65.642966][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 65.643246][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 65.643516][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 65.643795][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 65.644037][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 65.644326][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 65.644580][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 65.644871][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 65.645121][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.645381][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 65.645644][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 65.645913][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 65.646258][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 65.646547][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 65.646805][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 65.647161][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 65.647438][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 65.647732][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 65.648142][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.648441][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 65.648775][ T70] kthread (kernel/kthread.c:388) 
[ 65.649018][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.649290][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 65.649574][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 65.649841][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   86.678691][   T70] ------------[ cut here ]------------
| [   86.679012][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 86.679417][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   86.679944][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   86.681269][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   86.681979][   T70] Workqueue: netns cleanup_net
[ 86.682303][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.682633][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   86.683729][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   86.684099][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   86.684584][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   86.685237][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   86.685764][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007022628
[   86.686242][   T70] R13: ffff888007022df8 R14: ffffc9000050fc98 R15: ffff888007022bc0
[   86.686719][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[   86.687426][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   86.687880][   T70] CR2: 00007f09423510e0 CR3: 000000001eb34006 CR4: 00000000001706f0
[   86.688355][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   86.688821][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   86.689272][   T70] Call Trace:
[   86.689501][   T70]  <TASK>
[ 86.689673][ T70] ? __warn (kernel/panic.c:677) 
[ 86.689923][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 86.690237][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.690551][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 86.690834][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 86.691108][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 86.691418][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 86.691716][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 86.691983][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.692319][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 86.692629][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 86.692933][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 86.693214][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 86.693510][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 86.693806][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 86.694059][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 86.694349][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 86.694627][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 86.694907][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 86.695333][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 86.695687][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 86.695972][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 86.696380][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 86.696702][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 86.697011][ T70] kthread (kernel/kthread.c:388) 
[ 86.697261][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 86.697565][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 86.697842][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 86.698202][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   86.882534][   T70] ------------[ cut here ]------------
| [   86.882925][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 86.883352][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   86.883931][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   86.884943][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   86.885636][   T70] Workqueue: netns cleanup_net
[ 86.885903][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.886231][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   86.887272][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   86.887602][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   86.888022][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   86.888449][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   86.888879][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800958a628
[   86.889327][   T70] R13: ffff88800958adf8 R14: ffffc9000050fc98 R15: ffff88800958abc0
[   86.889793][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   86.890320][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   86.890705][   T70] CR2: 00007fc854467000 CR3: 000000001eb34006 CR4: 00000000001706f0
[   86.891171][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   86.891649][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   86.892109][   T70] Call Trace:
[   86.892311][   T70]  <TASK>
[ 86.892476][ T70] ? __warn (kernel/panic.c:677) 
[ 86.892722][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 86.892998][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.893311][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 86.893588][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 86.893850][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 86.894143][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 86.894436][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 86.894707][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 86.895016][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 86.895296][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 86.895618][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 86.895863][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 86.896144][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 86.896438][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 86.896718][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 86.897010][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 86.897298][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 86.897555][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 86.897860][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 86.898126][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 86.898407][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 86.898867][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 86.899184][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 86.899510][ T70] kthread (kernel/kthread.c:388) 
[ 86.899755][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 86.900023][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 86.900325][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 86.900640][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   87.078169][   T70] ------------[ cut here ]------------
| [   87.078523][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 87.078946][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   87.079522][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   87.080564][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   87.081324][   T70] Workqueue: netns cleanup_net
[ 87.081612][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.081976][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   87.083094][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   87.083431][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   87.083851][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   87.084284][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   87.084710][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88802065a628
[   87.085130][   T70] R13: ffff88802065adf8 R14: ffffc9000050fc98 R15: ffff88802065abc0
[   87.085562][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   87.086066][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   87.086496][   T70] CR2: 00007f72b1715060 CR3: 000000001eb34006 CR4: 00000000001706f0
[   87.086962][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   87.087480][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   87.087983][   T70] Call Trace:
[   87.088172][   T70]  <TASK>
[ 87.088344][ T70] ? __warn (kernel/panic.c:677) 
[ 87.088593][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 87.088881][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.089209][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 87.089469][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 87.089771][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 87.090052][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 87.090379][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 87.090661][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.090987][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 87.091273][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 87.091596][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 87.091874][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 87.092138][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 87.092455][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 87.092753][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 87.093055][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 87.093395][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 87.093665][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 87.093960][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 87.094277][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 87.094563][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 87.094964][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 87.095290][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 87.095579][ T70] kthread (kernel/kthread.c:388) 
[ 87.095819][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 87.096088][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 87.096355][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 87.096619][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   87.259428][   T70] ------------[ cut here ]------------
| [   87.259748][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 87.260143][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   87.260682][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   87.261599][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   87.262372][   T70] Workqueue: netns cleanup_net
[ 87.262710][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.263089][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   87.264278][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[   87.264675][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[   87.265157][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   87.265673][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[   87.266138][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880087b2628
[   87.266656][   T70] R13: ffff8880087b2df8 R14: ffffc9000050fc98 R15: ffff8880087b2bc0
[   87.267180][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   87.267739][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   87.268142][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34006 CR4: 00000000001706f0
[   87.268662][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   87.269170][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   87.269700][   T70] Call Trace:
[   87.269890][   T70]  <TASK>
[ 87.270093][ T70] ? __warn (kernel/panic.c:677) 
[ 87.270398][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 87.270671][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.270963][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 87.271234][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 87.271469][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 87.271722][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 87.272009][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 87.272260][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 87.272548][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 87.272816][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 87.273113][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 87.273385][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 87.273722][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 87.274068][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 87.274369][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 87.274697][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 87.275021][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 87.275328][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 87.275693][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 87.275971][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 87.276276][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 87.276708][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 87.277029][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 87.277393][ T70] kthread (kernel/kthread.c:388) 
[ 87.277646][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 87.277925][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 87.278209][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 87.278535][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  107.871245][   T70] ------------[ cut here ]------------
| [  107.871621][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 107.872051][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  107.872902][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  107.874177][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  107.874903][   T70] Workqueue: netns cleanup_net
[ 107.875210][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 107.875542][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  107.876586][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  107.876912][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  107.877343][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  107.877828][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  107.878335][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009cba628
[  107.878985][   T70] R13: ffff888009cbadf8 R14: ffffc9000050fc98 R15: ffff888009cbabc0
[  107.879489][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  107.879993][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  107.880393][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304005 CR4: 00000000001706f0
[  107.880973][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  107.881577][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  107.882050][   T70] Call Trace:
[  107.882262][   T70]  <TASK>
[ 107.882466][ T70] ? __warn (kernel/panic.c:677) 
[ 107.882728][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 107.883020][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 107.883326][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 107.883582][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 107.883850][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 107.884128][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 107.884461][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 107.884727][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 107.885015][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 107.885297][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 107.885621][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 107.885907][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 107.886188][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 107.886501][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 107.886791][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 107.887070][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 107.887385][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 107.887658][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 107.888008][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 107.888429][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 107.888827][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 107.889212][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 107.889543][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 107.889857][ T70] kthread (kernel/kthread.c:388) 
[ 107.890162][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 107.890560][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 107.890936][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 107.891228][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.082759][   T70] ------------[ cut here ]------------
| [  108.083091][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 108.083621][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.084219][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.085158][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.085938][   T70] Workqueue: netns cleanup_net
[ 108.086246][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.086600][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  108.087798][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  108.088176][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  108.088681][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  108.089156][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  108.089651][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008162628
[  108.090121][   T70] R13: ffff888008162df8 R14: ffffc9000050fc98 R15: ffff888008162bc0
[  108.090647][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  108.091171][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.091603][   T70] CR2: 00007fcbd62ad000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  108.092066][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.092534][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.093003][   T70] Call Trace:
[  108.093207][   T70]  <TASK>
[ 108.093392][ T70] ? __warn (kernel/panic.c:677) 
[ 108.093664][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 108.093959][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.094258][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 108.094510][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 108.094749][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 108.095005][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 108.095285][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 108.095529][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.095809][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 108.096060][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 108.096353][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 108.096597][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.096857][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 108.097127][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.097409][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 108.097722][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 108.098031][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 108.098311][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 108.098615][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 108.098900][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 108.099209][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 108.099593][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.099880][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.100204][ T70] kthread (kernel/kthread.c:388) 
[ 108.100459][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.100734][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 108.100977][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.101240][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.281478][   T70] ------------[ cut here ]------------
| [  108.281835][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 108.282294][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.282865][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.283765][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.284425][   T70] Workqueue: netns cleanup_net
[ 108.284690][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.285005][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  108.286129][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  108.286511][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  108.286943][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  108.287441][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  108.287919][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007262628
[  108.288441][   T70] R13: ffff888007262df8 R14: ffffc9000050fc98 R15: ffff888007262bc0
[  108.288900][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  108.289442][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.289839][   T70] CR2: 00007f5d8a140270 CR3: 000000001eb34004 CR4: 00000000001706f0
[  108.290398][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.290908][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.291421][   T70] Call Trace:
[  108.291641][   T70]  <TASK>
[ 108.291839][ T70] ? __warn (kernel/panic.c:677) 
[ 108.292091][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 108.292404][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.292757][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 108.293028][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 108.293345][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 108.293627][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 108.293930][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 108.294202][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.294515][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 108.294776][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 108.295067][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 108.295328][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.295586][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 108.295853][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.296101][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 108.296397][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 108.296666][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 108.296958][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 108.297348][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 108.297634][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 108.297920][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 108.298357][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.298694][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.299018][ T70] kthread (kernel/kthread.c:388) 
[ 108.299280][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.299590][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 108.299855][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.300198][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.470399][   T70] ------------[ cut here ]------------
| [  108.470738][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 108.471145][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.471650][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.472591][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.473290][   T70] Workqueue: netns cleanup_net
[ 108.473574][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.473904][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  108.475026][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  108.475423][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  108.475847][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  108.476346][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  108.476860][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007022628
[  108.477340][   T70] R13: ffff888007022df8 R14: ffffc9000050fc98 R15: ffff888007022bc0
[  108.477785][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  108.478283][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.478636][   T70] CR2: 000000000041af40 CR3: 000000001eb34004 CR4: 00000000001706f0
[  108.479068][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.479507][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.479981][   T70] Call Trace:
[  108.480188][   T70]  <TASK>
[ 108.480361][ T70] ? __warn (kernel/panic.c:677) 
[ 108.480606][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 108.480907][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.481224][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 108.481501][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 108.481753][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 108.482037][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 108.482354][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 108.482603][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.482924][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 108.483208][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 108.483543][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 108.483852][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.484143][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 108.484580][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 108.484836][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 108.485164][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 108.485485][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 108.485767][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 108.486115][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 108.486428][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 108.486728][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 108.487168][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.487506][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 108.487804][ T70] kthread (kernel/kthread.c:388) 
[ 108.488098][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.488417][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 108.488674][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 108.488942][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  129.125429][   T70] ------------[ cut here ]------------
| [  129.125792][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 129.126235][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  129.126796][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  129.127775][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  129.128437][   T70] Workqueue: netns cleanup_net
[ 129.128704][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.129016][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  129.130074][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  129.130408][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  129.130870][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  129.131375][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  129.131865][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a612628
[  129.132309][   T70] R13: ffff88800a612df8 R14: ffffc9000050fc98 R15: ffff88800a612bc0
[  129.132797][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  129.133327][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  129.133731][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304005 CR4: 00000000001706f0
[  129.134220][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  129.134708][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  129.135228][   T70] Call Trace:
[  129.135430][   T70]  <TASK>
[ 129.135606][ T70] ? __warn (kernel/panic.c:677) 
[ 129.135862][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 129.136187][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.136509][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 129.136792][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 129.137081][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 129.137369][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 129.137690][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 129.137941][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.138231][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 129.138487][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 129.138771][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 129.139015][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.139276][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 129.139546][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.139804][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 129.140091][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 129.140370][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 129.140629][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 129.140953][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 129.141255][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 129.141549][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 129.141960][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.142267][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.142559][ T70] kthread (kernel/kthread.c:388) 
[ 129.142846][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.143119][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 129.143388][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.143668][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  129.335762][   T70] ------------[ cut here ]------------
| [  129.336125][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 129.336538][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  129.337106][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  129.338094][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  129.338966][   T70] Workqueue: netns cleanup_net
[ 129.339265][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.339578][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  129.340667][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  129.340991][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  129.341420][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  129.341884][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  129.342377][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888004082628
[  129.342839][   T70] R13: ffff888004082df8 R14: ffffc9000050fc98 R15: ffff888004082bc0
[  129.343434][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  129.344105][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  129.344632][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304004 CR4: 00000000001706f0
[  129.345268][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  129.345895][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  129.346565][   T70] Call Trace:
[  129.346833][   T70]  <TASK>
[ 129.347078][ T70] ? __warn (kernel/panic.c:677) 
[ 129.347418][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 129.347827][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.348242][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 129.348645][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 129.348961][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 129.349357][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 129.349770][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 129.350097][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.350454][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 129.350788][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 129.351099][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 129.351358][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.351616][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 129.351884][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.352211][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 129.352543][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 129.352835][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 129.353084][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 129.353455][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 129.353796][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 129.354074][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 129.354501][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.354854][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.355235][ T70] kthread (kernel/kthread.c:388) 
[ 129.355533][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.355866][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 129.356208][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.356553][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  129.515819][   T70] ------------[ cut here ]------------
| [  129.516227][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 129.516664][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  129.517336][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  129.518502][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  129.519407][   T70] Workqueue: netns cleanup_net
[ 129.519852][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.520333][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  129.522010][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  129.522561][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  129.523222][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  129.523852][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  129.524420][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009712628
[  129.524973][   T70] R13: ffff888009712df8 R14: ffffc9000050fc98 R15: ffff888009712bc0
[  129.525530][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  129.526148][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  129.526656][   T70] CR2: 00007ffee1d0d948 CR3: 000000001eb34006 CR4: 00000000001706f0
[  129.527229][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  129.527721][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  129.528248][   T70] Call Trace:
[  129.528464][   T70]  <TASK>
[ 129.528675][ T70] ? __warn (kernel/panic.c:677) 
[ 129.528942][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 129.529224][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.529599][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 129.529900][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 129.530175][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 129.530511][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 129.530824][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 129.531125][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.531461][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 129.531754][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 129.532076][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 129.532375][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.532664][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 129.532990][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.533315][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 129.533638][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 129.533980][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 129.534263][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 129.534609][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 129.534907][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 129.535237][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 129.535704][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.536023][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.536333][ T70] kthread (kernel/kthread.c:388) 
[ 129.536582][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.536855][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 129.537096][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.537352][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  129.706437][   T70] ------------[ cut here ]------------
| [  129.706759][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 129.707156][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  129.707747][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  129.708769][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  129.709489][   T70] Workqueue: netns cleanup_net
[ 129.709753][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.710079][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  129.711130][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  129.711472][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  129.712029][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  129.712513][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  129.712982][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008502628
[  129.713455][   T70] R13: ffff888008502df8 R14: ffffc9000050fc98 R15: ffff888008502bc0
[  129.713965][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  129.714516][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  129.714901][   T70] CR2: 00007f9c9d648000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  129.715398][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  129.715872][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  129.716385][   T70] Call Trace:
[  129.716588][   T70]  <TASK>
[ 129.716748][ T70] ? __warn (kernel/panic.c:677) 
[ 129.717005][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 129.717317][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.717627][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 129.717887][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 129.718142][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 129.718447][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 129.718766][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 129.719012][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 129.719354][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 129.719634][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 129.719947][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 129.720238][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.720529][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 129.720826][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 129.721080][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 129.721373][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 129.721643][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 129.721893][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 129.722187][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 129.722452][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 129.722703][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 129.723057][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.723342][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 129.723658][ T70] kthread (kernel/kthread.c:388) 
[ 129.723894][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.724189][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 129.724472][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 129.724744][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  150.578327][   T70] ------------[ cut here ]------------
| [  150.578675][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 150.579101][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  150.579644][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  150.580587][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  150.581236][   T70] Workqueue: netns cleanup_net
[ 150.581498][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.581815][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  150.582896][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  150.583292][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  150.583780][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  150.584239][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  150.584758][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880201ea628
[  150.585270][   T70] R13: ffff8880201eadf8 R14: ffffc9000050fc98 R15: ffff8880201eabc0
[  150.585751][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  150.586304][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  150.586705][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304001 CR4: 00000000001706f0
[  150.587187][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  150.587697][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  150.588171][   T70] Call Trace:
[  150.588400][   T70]  <TASK>
[ 150.588584][ T70] ? __warn (kernel/panic.c:677) 
[ 150.588819][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 150.589136][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.589525][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 150.589816][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 150.590123][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 150.590402][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 150.590680][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 150.590924][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.591212][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 150.591465][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 150.591755][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 150.591999][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.592299][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 150.592601][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.592871][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 150.593269][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 150.593557][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 150.593829][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 150.594146][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 150.594423][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 150.594698][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 150.595105][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.595410][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.595719][ T70] kthread (kernel/kthread.c:388) 
[ 150.595955][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.596228][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 150.596503][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.596766][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  150.775336][   T70] ------------[ cut here ]------------
| [  150.775726][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 150.776159][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  150.776690][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  150.777651][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  150.778391][   T70] Workqueue: netns cleanup_net
[ 150.778672][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.779015][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  150.780065][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  150.780397][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  150.780821][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  150.781318][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  150.781805][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020682628
[  150.782275][   T70] R13: ffff888020682df8 R14: ffffc9000050fc98 R15: ffff888020682bc0
[  150.782795][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  150.783319][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  150.783672][   T70] CR2: 00007f0e6fc34270 CR3: 000000001eb34006 CR4: 00000000001706f0
[  150.784096][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  150.784526][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  150.784966][   T70] Call Trace:
[  150.785153][   T70]  <TASK>
[ 150.785320][ T70] ? __warn (kernel/panic.c:677) 
[ 150.785580][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 150.785877][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.786177][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 150.786474][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 150.786709][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 150.786961][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 150.787294][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 150.787555][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.787843][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 150.788131][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 150.788442][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 150.788710][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.788999][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 150.789276][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.789577][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 150.789882][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 150.790180][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 150.790451][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 150.790758][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 150.791060][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 150.791343][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 150.791728][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.792051][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.792339][ T70] kthread (kernel/kthread.c:388) 
[ 150.792592][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.792857][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 150.793093][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.793349][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  150.981378][   T70] ------------[ cut here ]------------
| [  150.981729][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 150.982129][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  150.982681][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  150.983631][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  150.984376][   T70] Workqueue: netns cleanup_net
[ 150.984644][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.984963][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  150.986003][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  150.986335][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  150.986757][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  150.987178][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  150.987605][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008622628
[  150.988028][   T70] R13: ffff888008622df8 R14: ffffc9000050fc98 R15: ffff888008622bc0
[  150.988514][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  150.989035][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  150.989437][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34006 CR4: 00000000001706f0
[  150.989909][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  150.990376][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  150.990863][   T70] Call Trace:
[  150.991053][   T70]  <TASK>
[ 150.991249][ T70] ? __warn (kernel/panic.c:677) 
[ 150.991496][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 150.991785][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.992107][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 150.992386][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 150.992628][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 150.992928][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 150.993224][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 150.993496][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 150.993814][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 150.994072][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 150.994406][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 150.994690][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.994995][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 150.995307][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 150.995562][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 150.995860][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 150.996139][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 150.996417][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 150.996719][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 150.996985][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 150.997283][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 150.997696][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.998018][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 150.998353][ T70] kthread (kernel/kthread.c:388) 
[ 150.998603][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.998898][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 150.999184][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 150.999462][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  151.176377][   T70] ------------[ cut here ]------------
| [  151.176719][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 151.177110][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  151.177631][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  151.178600][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  151.179318][   T70] Workqueue: netns cleanup_net
[ 151.179582][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 151.179924][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  151.181068][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  151.181425][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  151.181909][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  151.182408][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  151.182892][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009c42628
[  151.183378][   T70] R13: ffff888009c42df8 R14: ffffc9000050fc98 R15: ffff888009c42bc0
[  151.183871][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  151.184404][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  151.184817][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34006 CR4: 00000000001706f0
[  151.185277][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  151.185698][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  151.186198][   T70] Call Trace:
[  151.186378][   T70]  <TASK>
[ 151.186536][ T70] ? __warn (kernel/panic.c:677) 
[ 151.186759][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 151.187020][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 151.187308][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 151.187554][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 151.187794][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 151.188047][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 151.188361][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 151.188637][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 151.188961][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 151.189238][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 151.189546][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 151.189826][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 151.190096][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 151.190373][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 151.190651][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 151.190955][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 151.191243][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 151.191498][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 151.191809][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 151.192088][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 151.192368][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 151.192759][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 151.193065][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 151.193364][ T70] kthread (kernel/kthread.c:388) 
[ 151.193596][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 151.193861][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 151.194126][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 151.194393][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  171.795524][   T70] ------------[ cut here ]------------
| [  171.795879][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 171.796303][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  171.796834][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  171.797899][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  171.798783][   T70] Workqueue: netns cleanup_net
[ 171.799204][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.799711][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  171.801278][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  171.801791][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  171.802447][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  171.803082][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  171.803684][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a502628
[  171.804286][   T70] R13: ffff88800a502df8 R14: ffffc9000050fc98 R15: ffff88800a502bc0
[  171.804811][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  171.805345][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  171.805773][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304002 CR4: 00000000001706f0
[  171.806231][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  171.806754][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  171.807175][   T70] Call Trace:
[  171.807372][   T70]  <TASK>
[ 171.807555][ T70] ? __warn (kernel/panic.c:677) 
[ 171.807778][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 171.808039][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.808328][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 171.808599][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 171.808837][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 171.809085][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 171.809431][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 171.809743][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.810066][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 171.810361][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 171.810738][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 171.811009][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 171.811326][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 171.811621][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 171.811921][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 171.812251][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 171.812557][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 171.812842][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 171.813223][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 171.813534][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 171.813829][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 171.814243][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 171.814578][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 171.814882][ T70] kthread (kernel/kthread.c:388) 
[ 171.815108][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 171.815430][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 171.815720][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 171.815986][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  171.978415][   T70] ------------[ cut here ]------------
| [  171.978789][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 171.979259][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  171.979861][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  171.980822][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  171.981533][   T70] Workqueue: netns cleanup_net
[ 171.981838][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.982213][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  171.983267][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  171.983594][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  171.984013][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  171.984492][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  171.984974][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880201fa628
[  171.985474][   T70] R13: ffff8880201fadf8 R14: ffffc9000050fc98 R15: ffff8880201fabc0
[  171.985970][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  171.986551][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  171.986967][   T70] CR2: 000055b140770dec CR3: 000000001eb34004 CR4: 00000000001706f0
[  171.987449][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  171.987966][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  171.988464][   T70] Call Trace:
[  171.988688][   T70]  <TASK>
[ 171.988865][ T70] ? __warn (kernel/panic.c:677) 
[ 171.989170][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 171.989478][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.989845][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 171.990140][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 171.990438][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 171.990727][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 171.991073][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 171.991334][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 171.991683][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 171.991988][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 171.992326][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 171.992605][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 171.992893][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 171.993231][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 171.993556][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 171.993834][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 171.994118][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 171.994384][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 171.994672][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 171.994917][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 171.995170][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 171.995551][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 171.995827][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 171.996100][ T70] kthread (kernel/kthread.c:388) 
[ 171.996350][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 171.996600][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 171.996840][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 171.997100][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  172.164479][   T70] ------------[ cut here ]------------
| [  172.164837][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 172.165232][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  172.165721][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  172.166648][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  172.167335][   T70] Workqueue: netns cleanup_net
[ 172.167598][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.167967][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  172.169067][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  172.169438][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  172.169949][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  172.170488][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  172.170941][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009562628
[  172.171459][   T70] R13: ffff888009562df8 R14: ffffc9000050fc98 R15: ffff888009562bc0
[  172.171979][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  172.172545][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  172.172928][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304005 CR4: 00000000001706f0
[  172.173412][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  172.173910][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  172.174406][   T70] Call Trace:
[  172.174617][   T70]  <TASK>
[ 172.174781][ T70] ? __warn (kernel/panic.c:677) 
[ 172.175048][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.175399][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 172.175705][ T70] ? restore_regs_and_return_to_kernel (arch/x86/entry/entry_64.S:658) 
[ 172.176081][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 172.176384][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 172.176699][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 172.177017][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 172.177307][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.177635][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 172.177931][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 172.178259][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 172.178530][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 172.178831][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 172.179149][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 172.179445][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 172.179772][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 172.180081][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 172.180386][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 172.180724][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 172.180976][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 172.181234][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 172.181594][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 172.181867][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 172.182145][ T70] kthread (kernel/kthread.c:388) 
[ 172.182376][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 172.182632][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 172.182906][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 172.183219][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  172.363372][   T70] ------------[ cut here ]------------
| [  172.363712][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 172.364129][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  172.364688][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  172.365579][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  172.366248][   T70] Workqueue: netns cleanup_net
[ 172.366512][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.366823][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  172.367887][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  172.368217][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  172.368678][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  172.369151][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  172.369589][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88802005a628
[  172.370035][   T70] R13: ffff88802005adf8 R14: ffffc9000050fc98 R15: ffff88802005abc0
[  172.370476][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  172.370954][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  172.371334][   T70] CR2: 00007f0cad81d000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  172.371755][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  172.372200][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  172.372625][   T70] Call Trace:
[  172.372807][   T70]  <TASK>
[ 172.372973][ T70] ? __warn (kernel/panic.c:677) 
[ 172.373238][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 172.373530][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.373854][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 172.374108][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 172.374361][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 172.374658][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 172.374966][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 172.375243][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 172.375558][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 172.375844][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 172.376206][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 172.376471][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 172.376760][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 172.377071][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 172.377362][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 172.377668][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 172.377968][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 172.378250][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 172.378574][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 172.378861][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 172.379181][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 172.379587][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 172.379905][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 172.380237][ T70] kthread (kernel/kthread.c:388) 
[ 172.380476][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 172.380766][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 172.381049][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 172.381331][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  192.964053][   T70] ------------[ cut here ]------------
| [  192.964583][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 192.965166][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  192.965973][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  192.967400][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  192.968398][   T70] Workqueue: netns cleanup_net
[ 192.968674][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.968993][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  192.970304][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  192.970822][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  192.971466][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  192.972061][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  192.972750][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006092628
[  192.973416][   T70] R13: ffff888006092df8 R14: ffffc9000050fc98 R15: ffff888006092bc0
[  192.974092][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  192.974848][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.975416][   T70] CR2: 00007f651cb05000 CR3: 000000001eb34006 CR4: 00000000001706f0
[  192.976094][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  192.976549][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  192.977036][   T70] Call Trace:
[  192.977233][   T70]  <TASK>
[ 192.977412][ T70] ? __warn (kernel/panic.c:677) 
[ 192.977669][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 192.977940][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.978266][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 192.978534][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 192.978800][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 192.979072][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 192.979352][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 192.979608][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.979894][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 192.980148][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 192.980444][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 192.980736][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 192.980986][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 192.981257][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 192.981511][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 192.981789][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 192.982053][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 192.982305][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 192.982630][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 192.982912][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 192.983221][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 192.983604][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 192.983891][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 192.984208][ T70] kthread (kernel/kthread.c:388) 
[ 192.984447][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 192.984697][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 192.984938][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 192.985182][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  193.170133][   T70] ------------[ cut here ]------------
| [  193.170613][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 193.171041][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  193.171552][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  193.172465][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  193.173175][   T70] Workqueue: netns cleanup_net
[ 193.173483][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.173825][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  193.174981][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  193.175354][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  193.175849][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  193.176385][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  193.176840][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ab92628
[  193.177307][   T70] R13: ffff88800ab92df8 R14: ffffc9000050fc98 R15: ffff88800ab92bc0
[  193.177769][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  193.178301][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  193.178704][   T70] CR2: 00007f37d869d000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  193.179180][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  193.179654][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  193.180146][   T70] Call Trace:
[  193.180339][   T70]  <TASK>
[ 193.180522][ T70] ? __warn (kernel/panic.c:677) 
[ 193.180773][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 193.181055][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.181350][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 193.181599][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 193.181831][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 193.182084][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 193.182373][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 193.182613][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.182895][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 193.183181][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 193.183530][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 193.183793][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.184071][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 193.184387][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.184654][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 193.184934][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 193.185216][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 193.185465][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 193.185759][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 193.186012][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 193.186276][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 193.186630][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.186941][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.187257][ T70] kthread (kernel/kthread.c:388) 
[ 193.187479][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.187729][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 193.187970][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.188233][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  193.367861][   T70] ------------[ cut here ]------------
| [  193.368186][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 193.368952][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  193.369498][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  193.370449][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  193.371136][   T70] Workqueue: netns cleanup_net
[ 193.371435][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.371783][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  193.373380][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  193.373731][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  193.374180][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  193.374684][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  193.375172][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a6e2628
[  193.375682][   T70] R13: ffff88800a6e2df8 R14: ffffc9000050fc98 R15: ffff88800a6e2bc0
[  193.376173][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  193.376733][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  193.377086][   T70] CR2: 00007ffe746e2ff8 CR3: 0000000006b58001 CR4: 00000000001706f0
[  193.377569][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  193.377997][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  193.378494][   T70] Call Trace:
[  193.378716][   T70]  <TASK>
[ 193.378904][ T70] ? __warn (kernel/panic.c:677) 
[ 193.379149][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 193.379517][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.379844][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 193.380123][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 193.380461][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 193.380718][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 193.381035][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 193.381340][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.381638][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 193.381942][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 193.382368][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 193.382661][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.382921][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 193.383342][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.383632][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 193.383930][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 193.384286][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 193.384550][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 193.384910][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 193.385180][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 193.385481][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 193.385894][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.386211][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.386522][ T70] kthread (kernel/kthread.c:388) 
[ 193.386773][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.387053][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 193.387331][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.387580][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  193.547919][   T70] ------------[ cut here ]------------
| [  193.548441][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 193.549017][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  193.549746][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  193.551043][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  193.552077][   T70] Workqueue: netns cleanup_net
[ 193.552512][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.553021][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  193.554647][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  193.555152][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  193.555834][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  193.556489][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  193.557139][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a82a628
[  193.557819][   T70] R13: ffff88800a82adf8 R14: ffffc9000050fc98 R15: ffff88800a82abc0
[  193.558556][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  193.559362][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  193.559928][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304001 CR4: 00000000001706f0
[  193.560588][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  193.561203][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  193.561811][   T70] Call Trace:
[  193.562068][   T70]  <TASK>
[ 193.562306][ T70] ? __warn (kernel/panic.c:677) 
[ 193.562626][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 193.563002][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.563412][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 193.563790][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 193.564126][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 193.564497][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 193.564892][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 193.565250][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 193.565717][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 193.566110][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 193.566556][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 193.566936][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.567329][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 193.567748][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 193.568145][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 193.568582][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 193.568997][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 193.569427][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 193.569887][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 193.570304][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 193.570692][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 193.571266][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.571696][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 193.572134][ T70] kthread (kernel/kthread.c:388) 
[ 193.572501][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.572881][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 193.573291][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 193.573684][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  216.384416][   T70] ------------[ cut here ]------------
| [  216.384780][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 216.385237][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  216.385828][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  216.386878][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  216.387571][   T70] Workqueue: netns cleanup_net
[ 216.387884][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.388211][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  216.389498][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  216.389886][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  216.390444][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  216.390917][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  216.391435][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008502628
[  216.391900][   T70] R13: ffff888008502df8 R14: ffffc9000050fc98 R15: ffff888008502bc0
[  216.392441][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  216.392963][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  216.393394][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304001 CR4: 00000000001706f0
[  216.393859][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  216.394288][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  216.394719][   T70] Call Trace:
[  216.394900][   T70]  <TASK>
[ 216.395062][ T70] ? __warn (kernel/panic.c:677) 
[ 216.395297][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 216.395563][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.395847][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 216.396140][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 216.396426][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 216.396716][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 216.397024][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 216.397299][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.397625][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 216.397895][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 216.398244][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 216.398503][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.398826][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 216.399121][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.399409][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 216.399743][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 216.400055][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 216.400337][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 216.400673][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 216.400941][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 216.401250][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 216.401656][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.401960][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.402302][ T70] kthread (kernel/kthread.c:388) 
[ 216.402537][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.402813][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 216.403090][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.403378][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  216.609476][   T70] ------------[ cut here ]------------
| [  216.609825][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 216.610238][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  216.610759][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  216.611765][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  216.612509][   T70] Workqueue: netns cleanup_net
[ 216.612848][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.613160][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  216.614275][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  216.614644][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  216.615135][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  216.615628][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  216.616204][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880080f2628
[  216.616691][   T70] R13: ffff8880080f2df8 R14: ffffc9000050fc98 R15: ffff8880080f2bc0
[  216.617209][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  216.617745][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  216.618147][   T70] CR2: 00007f2de48602a8 CR3: 000000001eb34006 CR4: 00000000001706f0
[  216.618626][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  216.619047][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  216.619520][   T70] Call Trace:
[  216.619708][   T70]  <TASK>
[ 216.619866][ T70] ? __warn (kernel/panic.c:677) 
[ 216.620089][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 216.620355][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.620662][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 216.620996][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 216.621241][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 216.621495][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 216.621826][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 216.622086][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.622406][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 216.622730][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 216.623035][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 216.623297][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.623551][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 216.623882][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.624174][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 216.624494][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 216.624784][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 216.625088][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 216.625428][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 216.625715][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 216.625965][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 216.626385][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.626706][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.627019][ T70] kthread (kernel/kthread.c:388) 
[ 216.627276][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.627550][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 216.627817][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.628094][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  216.825508][   T70] ------------[ cut here ]------------
| [  216.825875][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 216.826320][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  216.826896][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  216.827990][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  216.828773][   T70] Workqueue: netns cleanup_net
[ 216.829065][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.829427][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  216.830722][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  216.831090][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  216.831601][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  216.832093][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  216.832567][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880084f2628
[  216.833017][   T70] R13: ffff8880084f2df8 R14: ffffc9000050fc98 R15: ffff8880084f2bc0
[  216.833443][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  216.833907][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  216.834295][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304004 CR4: 00000000001706f0
[  216.834725][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  216.835230][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  216.835725][   T70] Call Trace:
[  216.835922][   T70]  <TASK>
[ 216.836108][ T70] ? __warn (kernel/panic.c:677) 
[ 216.836441][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 216.836715][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.837062][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 216.837340][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 216.837642][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 216.837933][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 216.838257][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 216.838563][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 216.838903][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 216.839167][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 216.839514][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 216.839829][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.840111][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 216.840453][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 216.840726][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 216.841090][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 216.841431][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 216.841709][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 216.842085][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 216.842346][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 216.842649][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 216.843101][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.843419][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 216.843768][ T70] kthread (kernel/kthread.c:388) 
[ 216.843996][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.844281][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 216.844521][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 216.844768][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  217.047603][   T70] ------------[ cut here ]------------
| [  217.047975][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 217.048424][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  217.049003][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  217.049971][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  217.050758][   T70] Workqueue: netns cleanup_net
[ 217.051031][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 217.051362][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  217.052441][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  217.052775][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  217.053226][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  217.053665][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  217.054101][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007d72628
[  217.054548][   T70] R13: ffff888007d72df8 R14: ffffc9000050fc98 R15: ffff888007d72bc0
[  217.055029][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  217.055556][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  217.055970][   T70] CR2: 00007f97853fb270 CR3: 000000001eb34003 CR4: 00000000001706f0
[  217.056463][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  217.056957][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  217.057452][   T70] Call Trace:
[  217.057664][   T70]  <TASK>
[ 217.057867][ T70] ? __warn (kernel/panic.c:677) 
[ 217.058147][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 217.058465][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 217.058816][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 217.059104][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 217.059431][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 217.059781][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 217.060123][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 217.060417][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 217.060768][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 217.061126][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 217.061475][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 217.061764][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 217.062110][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 217.062495][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 217.062810][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 217.063128][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 217.063469][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 217.063808][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 217.064155][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 217.064463][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 217.064782][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 217.065223][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 217.065558][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 217.065886][ T70] kthread (kernel/kthread.c:388) 
[ 217.066184][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 217.066536][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 217.066845][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 217.067135][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  239.996265][   T70] ------------[ cut here ]------------
| [  239.996840][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 239.997423][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  239.998144][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  239.999451][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  240.000497][   T70] Workqueue: netns cleanup_net
[ 240.000935][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.001443][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  240.003082][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  240.003576][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  240.004216][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  240.004857][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  240.005592][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009c72628
[  240.006313][   T70] R13: ffff888009c72df8 R14: ffffc9000050fc98 R15: ffff888009c72bc0
[  240.007013][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  240.007808][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  240.008369][   T70] CR2: 00007f01e0c67000 CR3: 000000001eb34005 CR4: 00000000001706f0
[  240.009035][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  240.009723][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  240.010390][   T70] Call Trace:
[  240.010686][   T70]  <TASK>
[ 240.010955][ T70] ? __warn (kernel/panic.c:677) 
[ 240.011327][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 240.011743][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.012203][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 240.012595][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 240.012968][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 240.013388][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 240.013817][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 240.014231][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.014679][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 240.015091][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 240.015543][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 240.015907][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.016298][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 240.016700][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.017073][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 240.017497][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 240.017897][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 240.018269][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 240.018691][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 240.019041][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 240.019429][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 240.020001][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.020451][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.020891][ T70] kthread (kernel/kthread.c:388) 
[ 240.021253][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.021638][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 240.022016][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.022429][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  240.204602][   T70] ------------[ cut here ]------------
| [  240.204998][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 240.205404][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  240.205964][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  240.206960][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  240.207672][   T70] Workqueue: netns cleanup_net
[ 240.207963][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.208327][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  240.209530][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  240.209915][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  240.210403][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  240.210834][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  240.211268][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007c3a628
[  240.211702][   T70] R13: ffff888007c3adf8 R14: ffffc9000050fc98 R15: ffff888007c3abc0
[  240.212124][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  240.212610][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  240.212965][   T70] CR2: 00007f01e0c67000 CR3: 000000001eb34005 CR4: 00000000001706f0
[  240.213403][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  240.213830][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  240.214327][   T70] Call Trace:
[  240.214554][   T70]  <TASK>
[ 240.214732][ T70] ? __warn (kernel/panic.c:677) 
[ 240.214990][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 240.215292][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.215638][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 240.215912][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 240.216219][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 240.216524][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 240.216852][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 240.217137][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.217462][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 240.217762][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 240.218101][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 240.218389][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.218689][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 240.219002][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.219317][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 240.219682][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 240.219981][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 240.220292][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 240.220635][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 240.220922][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 240.221233][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 240.221627][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.221971][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.222294][ T70] kthread (kernel/kthread.c:388) 
[ 240.222560][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.222860][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 240.223100][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.223368][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  240.406460][   T70] ------------[ cut here ]------------
| [  240.406818][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 240.407242][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  240.407779][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  240.408795][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  240.409549][   T70] Workqueue: netns cleanup_net
[ 240.409847][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.410242][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  240.411430][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  240.411802][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  240.412258][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  240.412706][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  240.413146][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a0e2628
[  240.413574][   T70] R13: ffff88800a0e2df8 R14: ffffc9000050fc98 R15: ffff88800a0e2bc0
[  240.414008][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  240.414519][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  240.414883][   T70] CR2: 00007fb71faa0000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  240.415384][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  240.415860][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  240.416359][   T70] Call Trace:
[  240.416579][   T70]  <TASK>
[ 240.416748][ T70] ? __warn (kernel/panic.c:677) 
[ 240.416986][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 240.417280][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.417616][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 240.417896][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 240.418176][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 240.418474][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 240.418782][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 240.419034][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.419328][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 240.419592][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 240.419882][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 240.420122][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.420382][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 240.420648][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.420895][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 240.421218][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 240.421518][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 240.421790][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 240.422093][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 240.422371][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 240.422652][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 240.423048][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.423372][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.423686][ T70] kthread (kernel/kthread.c:388) 
[ 240.423936][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.424219][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 240.424506][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.424808][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  240.635045][   T70] ------------[ cut here ]------------
| [  240.635520][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 240.636129][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  240.636866][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  240.638240][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  240.639175][   T70] Workqueue: netns cleanup_net
[ 240.639576][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.640024][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  240.641639][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  240.642125][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  240.642767][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  240.643389][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  240.644017][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800702a628
[  240.644640][   T70] R13: ffff88800702adf8 R14: ffffc9000050fc98 R15: ffff88800702abc0
[  240.645270][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  240.645970][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  240.646560][   T70] CR2: 000055b140770dec CR3: 000000001eb34001 CR4: 00000000001706f0
[  240.647231][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  240.647863][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  240.648541][   T70] Call Trace:
[  240.648820][   T70]  <TASK>
[ 240.649063][ T70] ? __warn (kernel/panic.c:677) 
[ 240.649435][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 240.649844][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.650306][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 240.650705][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 240.651096][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 240.651510][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 240.651948][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 240.652367][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 240.652794][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 240.653242][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 240.653693][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 240.654077][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.654495][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 240.654922][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 240.655325][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 240.655767][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 240.656178][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 240.656580][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 240.657038][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 240.657432][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 240.657864][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 240.658406][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.658803][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 240.659212][ T70] kthread (kernel/kthread.c:388) 
[ 240.659540][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.659884][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 240.660237][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 240.660594][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  263.517098][   T70] ------------[ cut here ]------------
| [  263.517610][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 263.518168][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  263.518901][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  263.520227][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  263.521314][   T70] Workqueue: netns cleanup_net
[ 263.521727][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.522140][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  263.523267][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  263.523629][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  263.524113][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  263.524583][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  263.525040][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800841a628
[  263.525514][   T70] R13: ffff88800841adf8 R14: ffffc9000050fc98 R15: ffff88800841abc0
[  263.525987][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  263.526510][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  263.526908][   T70] CR2: 00007f3018286000 CR3: 000000001eb34003 CR4: 00000000001706f0
[  263.527338][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  263.527757][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  263.528214][   T70] Call Trace:
[  263.528398][   T70]  <TASK>
[ 263.528557][ T70] ? __warn (kernel/panic.c:677) 
[ 263.528781][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 263.529084][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.529444][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 263.529723][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 263.530003][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 263.530298][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 263.530602][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 263.530875][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.531187][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 263.531464][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 263.531779][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 263.532062][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.532333][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 263.532628][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.532930][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 263.533230][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 263.533519][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 263.533807][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 263.534121][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 263.534390][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 263.534697][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 263.535083][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.535391][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.535692][ T70] kthread (kernel/kthread.c:388) 
[ 263.535930][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.536226][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 263.536502][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.536758][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  263.720477][   T70] ------------[ cut here ]------------
| [  263.720834][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 263.721270][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  263.721823][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  263.722729][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  263.723387][   T70] Workqueue: netns cleanup_net
[ 263.723653][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.723971][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  263.725051][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  263.725438][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  263.725908][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  263.726398][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  263.726872][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a44a628
[  263.727386][   T70] R13: ffff88800a44adf8 R14: ffffc9000050fc98 R15: ffff88800a44abc0
[  263.727905][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  263.728443][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  263.728879][   T70] CR2: 00007f3a7a26c270 CR3: 000000001eb34004 CR4: 00000000001706f0
[  263.729381][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  263.729891][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  263.730464][   T70] Call Trace:
[  263.730658][   T70]  <TASK>
[ 263.730855][ T70] ? __warn (kernel/panic.c:677) 
[ 263.731119][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 263.731434][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.731782][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 263.732086][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 263.732370][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 263.732675][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 263.732993][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 263.733263][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.733544][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 263.733796][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 263.734083][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 263.734330][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.734665][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 263.735000][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.735301][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 263.735649][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 263.735969][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 263.736279][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 263.736618][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 263.736946][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 263.737230][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 263.737611][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.737917][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.738220][ T70] kthread (kernel/kthread.c:388) 
[ 263.738466][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.738766][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 263.739029][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.739349][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  263.901037][   T70] ------------[ cut here ]------------
| [  263.901448][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 263.901879][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  263.902448][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  263.903479][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  263.904214][   T70] Workqueue: netns cleanup_net
[ 263.904520][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.904853][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  263.906140][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  263.906497][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  263.906942][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  263.907397][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  263.907846][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800aa52628
[  263.908357][   T70] R13: ffff88800aa52df8 R14: ffffc9000050fc98 R15: ffff88800aa52bc0
[  263.908911][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  263.909454][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  263.909831][   T70] CR2: 00007f56b1ca8270 CR3: 000000001eb34003 CR4: 00000000001706f0
[  263.910314][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  263.910767][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  263.911238][   T70] Call Trace:
[  263.911440][   T70]  <TASK>
[ 263.911646][ T70] ? __warn (kernel/panic.c:677) 
[ 263.911942][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 263.912264][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.912586][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 263.912905][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 263.913176][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 263.913505][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 263.913856][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 263.914142][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 263.914539][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 263.914852][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 263.915260][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 263.915591][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.915951][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 263.916358][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 263.916651][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 263.916972][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 263.917376][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 263.917695][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 263.918109][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 263.918428][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 263.918738][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 263.919213][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.919578][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 263.919913][ T70] kthread (kernel/kthread.c:388) 
[ 263.920224][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.920544][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 263.920895][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 263.921167][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  264.101859][   T70] ------------[ cut here ]------------
| [  264.102241][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 264.102653][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  264.103157][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  264.104073][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  264.104737][   T70] Workqueue: netns cleanup_net
[ 264.105039][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 264.105398][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  264.106493][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  264.106852][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  264.107325][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  264.107752][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  264.108174][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005cf2628
[  264.108710][   T70] R13: ffff888005cf2df8 R14: ffffc9000050fc98 R15: ffff888005cf2bc0
[  264.109171][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  264.109730][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  264.110110][   T70] CR2: 00007f43790a8270 CR3: 000000001eb34005 CR4: 00000000001706f0
[  264.110610][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  264.111083][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  264.111563][   T70] Call Trace:
[  264.111792][   T70]  <TASK>
[ 264.111959][ T70] ? __warn (kernel/panic.c:677) 
[ 264.112221][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 264.112501][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 264.112806][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 264.113114][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 264.113369][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 264.113650][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 264.113967][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 264.114257][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 264.114556][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 264.114833][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 264.115174][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 264.115442][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 264.115735][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 264.116026][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 264.116332][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 264.116649][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 264.116926][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 264.117200][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 264.117581][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 264.117828][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 264.118081][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 264.118437][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 264.118737][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 264.119009][ T70] kthread (kernel/kthread.c:388) 
[ 264.119236][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 264.119495][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 264.119763][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 264.120010][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.224613][   T70] ------------[ cut here ]------------
| [  287.224956][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 287.225384][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.225925][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  287.226937][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.227685][   T70] Workqueue: netns cleanup_net
[ 287.228094][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.228464][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  287.229883][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  287.230404][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  287.231039][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  287.231690][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  287.232346][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020442628
[  287.232940][   T70] R13: ffff888020442df8 R14: ffffc9000050fc98 R15: ffff888020442bc0
[  287.233547][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  287.234175][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.234610][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304003 CR4: 00000000001706f0
[  287.235137][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.235629][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.236061][   T70] Call Trace:
[  287.236291][   T70]  <TASK>
[ 287.236483][ T70] ? __warn (kernel/panic.c:677) 
[ 287.236781][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 287.237058][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.237397][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 287.237717][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 287.238034][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 287.238448][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 287.238884][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 287.239284][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.239705][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 287.240097][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 287.240497][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 287.240863][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.241285][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 287.241693][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.242066][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 287.242502][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 287.242934][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 287.243317][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 287.243704][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 287.244148][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 287.244504][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 287.244947][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.245279][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.245603][ T70] kthread (kernel/kthread.c:388) 
[ 287.245881][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.246177][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 287.246461][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.246751][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.448883][   T70] ------------[ cut here ]------------
| [  287.449356][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 287.449896][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.450720][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  287.452217][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.453166][   T70] Workqueue: netns cleanup_net
[ 287.453562][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.454027][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  287.455671][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  287.456184][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  287.456873][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  287.457583][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  287.458299][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880073b2628
[  287.458829][   T70] R13: ffff8880073b2df8 R14: ffffc9000050fc98 R15: ffff8880073b2bc0
[  287.459319][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  287.459827][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.460274][   T70] CR2: 00007f25de1df000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  287.460750][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.461250][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.461733][   T70] Call Trace:
[  287.461931][   T70]  <TASK>
[ 287.462101][ T70] ? __warn (kernel/panic.c:677) 
[ 287.462365][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 287.462642][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.462951][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 287.463259][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 287.463500][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 287.463763][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 287.464037][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 287.464288][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.464572][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 287.464838][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 287.465122][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 287.465371][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.465633][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 287.465901][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.466150][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 287.466436][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 287.466711][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 287.466967][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 287.467296][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 287.467619][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 287.467901][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 287.468312][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.468702][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.468995][ T70] kthread (kernel/kthread.c:388) 
[ 287.469369][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.469744][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 287.470042][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.470321][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.674386][   T70] ------------[ cut here ]------------
| [  287.674755][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 287.675212][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.675796][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  287.676800][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.677578][   T70] Workqueue: netns cleanup_net
[ 287.677854][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.678234][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  287.679513][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  287.679885][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  287.680314][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  287.680744][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  287.681188][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020702628
[  287.681691][   T70] R13: ffff888020702df8 R14: ffffc9000050fc98 R15: ffff888020702bc0
[  287.682240][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  287.682781][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.683231][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304006 CR4: 00000000001706f0
[  287.683752][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.684243][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.684777][   T70] Call Trace:
[  287.684968][   T70]  <TASK>
[ 287.685159][ T70] ? __warn (kernel/panic.c:677) 
[ 287.685435][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.685751][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 287.686044][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 287.686333][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 287.686615][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 287.686906][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 287.687197][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.687495][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 287.687794][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 287.688099][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 287.688365][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.688656][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 287.688966][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.689277][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 287.689569][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 287.689867][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 287.690166][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 287.690481][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 287.690733][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 287.690989][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 287.691354][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.691630][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.691903][ T70] kthread (kernel/kthread.c:388) 
[ 287.692123][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.692401][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 287.692664][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.692943][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.860540][   T70] ------------[ cut here ]------------
| [  287.860857][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 287.861273][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.861792][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  287.862709][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.863366][   T70] Workqueue: netns cleanup_net
[ 287.863628][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.863947][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  287.865023][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  287.865407][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  287.865841][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  287.866274][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  287.866753][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880087aa628
[  287.867242][   T70] R13: ffff8880087aadf8 R14: ffffc9000050fc98 R15: ffff8880087aabc0
[  287.867735][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  287.868310][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.868745][   T70] CR2: 00007f6f0108a000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  287.869237][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.869702][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.870156][   T70] Call Trace:
[  287.870358][   T70]  <TASK>
[ 287.870533][ T70] ? __warn (kernel/panic.c:677) 
[ 287.870757][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 287.871016][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.871335][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 287.871634][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 287.871900][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 287.872226][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 287.872500][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 287.872738][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.873060][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 287.873357][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 287.873658][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 287.873940][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.874232][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 287.874531][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 287.874833][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 287.875164][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 287.875463][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 287.875778][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 287.876135][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 287.876443][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 287.876751][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 287.877179][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.877527][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 287.877843][ T70] kthread (kernel/kthread.c:388) 
[ 287.878099][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.878417][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 287.878657][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 287.878900][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  306.619412][   T70] ------------[ cut here ]------------
| [  306.619768][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 306.620232][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  306.620723][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  306.621608][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  306.622280][   T70] Workqueue: netns cleanup_net
[ 306.622544][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.622856][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  306.623899][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  306.624241][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  306.624760][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  306.625302][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  306.625835][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880202f2628
[  306.626371][   T70] R13: ffff8880202f2df8 R14: ffffc9000050fc98 R15: ffff8880202f2bc0
[  306.626903][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  306.627518][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  306.627930][   T70] CR2: 000055b1414f1b78 CR3: 0000000006342003 CR4: 00000000001706f0
[  306.628486][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  306.629028][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  306.629583][   T70] Call Trace:
[  306.629813][   T70]  <TASK>
[ 306.630018][ T70] ? __warn (kernel/panic.c:677) 
[ 306.630287][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.630613][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 306.630907][ T70] ? restore_regs_and_return_to_kernel (arch/x86/entry/entry_64.S:658) 
[ 306.631316][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 306.631635][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 306.631919][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 306.632223][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 306.632563][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.632874][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 306.633211][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 306.633545][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 306.633831][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 306.634096][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 306.634376][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 306.634633][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 306.634914][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 306.635187][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 306.635445][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 306.635737][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 306.635995][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 306.636255][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 306.636669][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 306.636996][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 306.637401][ T70] kthread (kernel/kthread.c:388) 
[ 306.637671][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 306.637960][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 306.638262][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 306.638552][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  306.805346][   T70] ------------[ cut here ]------------
| [  306.805668][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 306.806088][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  306.806704][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  306.807662][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  306.808377][   T70] Workqueue: netns cleanup_net
[ 306.808651][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.808985][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  306.810151][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  306.810528][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  306.810994][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  306.811493][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  306.811950][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007eea628
[  306.812404][   T70] R13: ffff888007eeadf8 R14: ffffc9000050fc98 R15: ffff888007eeabc0
[  306.812826][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  306.813308][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  306.813663][   T70] CR2: 00007f7032a762a8 CR3: 000000001eb34001 CR4: 00000000001706f0
[  306.814173][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  306.814745][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  306.815495][   T70] Call Trace:
[  306.815800][   T70]  <TASK>
[ 306.816053][ T70] ? __warn (kernel/panic.c:677) 
[ 306.816445][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 306.816864][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.817352][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 306.817724][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 306.818070][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 306.818453][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 306.818853][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 306.819223][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 306.819638][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 306.820066][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 306.820590][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 306.821000][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 306.821426][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 306.821852][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 306.822265][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 306.822717][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 306.823157][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 306.823572][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 306.824032][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 306.824461][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 306.824876][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 306.825478][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 306.825894][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 306.826383][ T70] kthread (kernel/kthread.c:388) 
[ 306.826734][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 306.827114][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 306.827507][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 306.827897][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.040906][   T70] ------------[ cut here ]------------
| [  307.041334][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 307.041783][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.042388][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  307.043313][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.044046][   T70] Workqueue: netns cleanup_net
[ 307.044327][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.044728][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  307.046014][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  307.046381][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  307.046883][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.047422][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  307.047923][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a9f2628
[  307.048450][   T70] R13: ffff88800a9f2df8 R14: ffffc9000050fc98 R15: ffff88800a9f2bc0
[  307.048925][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  307.049617][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.049986][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304003 CR4: 00000000001706f0
[  307.050470][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.050935][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.051374][   T70] Call Trace:
[  307.051555][   T70]  <TASK>
[ 307.051714][ T70] ? __warn (kernel/panic.c:677) 
[ 307.051944][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.052220][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.052501][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.052747][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.053005][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.053309][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.053631][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 307.053911][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.054226][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.054552][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.054917][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.055183][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.055517][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.055847][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.056154][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.056507][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 307.056832][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 307.057134][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.057490][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 307.057826][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.058149][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.058580][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.058903][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.059244][ T70] kthread (kernel/kthread.c:388) 
[ 307.059505][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.059781][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.060079][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.060399][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.250527][   T70] ------------[ cut here ]------------
| [  307.250894][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 307.251370][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.251930][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  307.252825][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.253489][   T70] Workqueue: netns cleanup_net
[ 307.253755][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.254066][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  307.255095][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  307.255424][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  307.255857][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.256353][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  307.256868][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008392628
[  307.257361][   T70] R13: ffff888008392df8 R14: ffffc9000050fc98 R15: ffff888008392bc0
[  307.257877][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  307.258480][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.258885][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304003 CR4: 00000000001706f0
[  307.259452][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.259956][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.260482][   T70] Call Trace:
[  307.260682][   T70]  <TASK>
[ 307.260890][ T70] ? __warn (kernel/panic.c:677) 
[ 307.261175][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.261485][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.261848][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.262134][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.262435][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.262738][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.263076][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 307.263374][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.263741][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.264031][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.264379][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.264662][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.264918][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.265186][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.265449][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.265726][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 307.266002][ T70] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 307.266252][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.266541][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 307.266792][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.267054][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.267500][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.267820][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.268128][ T70] kthread (kernel/kthread.c:388) 
[ 307.268416][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.268685][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.268968][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.269271][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  325.940723][   T70] ------------[ cut here ]------------
| [  325.941071][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 325.941534][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  325.942080][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  325.943037][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  325.943752][   T70] Workqueue: netns cleanup_net
[ 325.944077][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.944412][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  325.945570][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  325.945927][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  325.946401][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  325.946890][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  325.947364][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880060da628
[  325.947827][   T70] R13: ffff8880060dadf8 R14: ffffc9000050fc98 R15: ffff8880060dabc0
[  325.948395][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  325.948926][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  325.949342][   T70] CR2: 00007f09423510e0 CR3: 000000001eb34001 CR4: 00000000001706f0
[  325.949812][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  325.950261][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  325.950707][   T70] Call Trace:
[  325.950899][   T70]  <TASK>
[ 325.951066][ T70] ? __warn (kernel/panic.c:677) 
[ 325.951318][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 325.951635][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.952006][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 325.952419][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 325.952753][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 325.953146][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 325.953597][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 325.953997][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.954455][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 325.954875][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 325.955349][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 325.955739][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 325.956145][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 325.956588][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 325.957005][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 325.957462][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 325.957882][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 325.958364][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 325.958776][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 325.959213][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 325.959764][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.960226][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.960680][ T70] kthread (kernel/kthread.c:388) 
[ 325.961050][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.961450][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 325.961860][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.962290][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  326.135801][   T70] ------------[ cut here ]------------
| [  326.136325][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 326.136864][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  326.137499][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  326.138528][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  326.139338][   T70] Workqueue: netns cleanup_net
[ 326.139637][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.139978][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  326.141182][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  326.141580][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  326.142046][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  326.142537][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  326.142970][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009dfa628
[  326.143410][   T70] R13: ffff888009dfadf8 R14: ffffc9000050fc98 R15: ffff888009dfabc0
[  326.143837][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  326.144332][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  326.144743][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304002 CR4: 00000000001706f0
[  326.145256][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  326.145757][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  326.146259][   T70] Call Trace:
[  326.146472][   T70]  <TASK>
[ 326.146654][ T70] ? __warn (kernel/panic.c:677) 
[ 326.146887][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 326.147228][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.147549][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 326.147829][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 326.148121][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 326.148421][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 326.148717][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 326.149000][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.149356][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 326.149621][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 326.149934][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 326.150208][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.150525][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 326.150795][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.151047][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 326.151336][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 326.151612][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 326.151905][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 326.152156][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 326.152429][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 326.152806][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.153117][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.153424][ T70] kthread (kernel/kthread.c:388) 
[ 326.153644][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.153889][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 326.154131][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.154393][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  326.325572][   T70] ------------[ cut here ]------------
| [  326.325909][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 326.326318][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  326.326828][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  326.327855][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  326.328650][   T70] Workqueue: netns cleanup_net
[ 326.328931][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.329400][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  326.330715][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  326.331118][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  326.331668][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  326.332223][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  326.332741][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880071d2628
[  326.333297][   T70] R13: ffff8880071d2df8 R14: ffffc9000050fc98 R15: ffff8880071d2bc0
[  326.333804][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  326.334375][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  326.334769][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304005 CR4: 00000000001706f0
[  326.335263][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  326.335708][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  326.336131][   T70] Call Trace:
[  326.336316][   T70]  <TASK>
[ 326.336479][ T70] ? __warn (kernel/panic.c:677) 
[ 326.336705][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 326.336964][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.337254][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 326.337504][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 326.337740][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 326.338020][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 326.338393][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 326.338684][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.339060][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 326.339365][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 326.339724][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 326.340012][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.340354][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 326.340707][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.341006][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 326.341374][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 326.341703][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 326.342047][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 326.342411][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 326.342724][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 326.343208][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.343689][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.344103][ T70] kthread (kernel/kthread.c:388) 
[ 326.344440][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.344783][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 326.345104][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.345451][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  326.533000][   T70] ------------[ cut here ]------------
| [  326.533817][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 326.534451][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  326.535175][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  326.536491][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  326.537462][   T70] Workqueue: netns cleanup_net
[ 326.537835][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.538351][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  326.539487][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  326.539888][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  326.540393][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  326.540849][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  326.541345][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a58a628
[  326.541840][   T70] R13: ffff88800a58adf8 R14: ffffc9000050fc98 R15: ffff88800a58abc0
[  326.542310][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  326.542823][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  326.543231][   T70] CR2: 000055b14071e5a0 CR3: 000000001eb34003 CR4: 00000000001706f0
[  326.543706][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  326.544183][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  326.544644][   T70] Call Trace:
[  326.544877][   T70]  <TASK>
[ 326.545052][ T70] ? __warn (kernel/panic.c:677) 
[ 326.545317][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 326.545630][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.545952][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 326.546251][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 326.546554][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 326.546862][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 326.547167][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 326.547466][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 326.547837][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 326.548125][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 326.548469][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 326.548752][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.549165][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 326.549624][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 326.550040][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 326.550462][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 326.550858][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 326.551300][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 326.551670][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 326.552040][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 326.552577][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.553048][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 326.553540][ T70] kthread (kernel/kthread.c:388) 
[ 326.553916][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.554352][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 326.554710][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 326.555071][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.230382][   T70] ------------[ cut here ]------------
| [  345.230698][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 345.231095][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.231602][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  345.232619][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.233352][   T70] Workqueue: netns cleanup_net
[ 345.233680][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.234027][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  345.235220][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  345.235603][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  345.236139][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  345.236682][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  345.237250][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880205ca628
[  345.237813][   T70] R13: ffff8880205cadf8 R14: ffffc9000050fc98 R15: ffff8880205cabc0
[  345.238415][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  345.238954][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.239401][   T70] CR2: 00007f1dea5c530d CR3: 0000000006342004 CR4: 00000000001706f0
[  345.239876][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.240345][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.240790][   T70] Call Trace:
[  345.240983][   T70]  <TASK>
[ 345.241145][ T70] ? __warn (kernel/panic.c:677) 
[ 345.241377][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 345.241666][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.241983][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 345.242264][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 345.242517][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 345.242813][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 345.243114][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 345.243390][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.243721][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 345.244011][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 345.244338][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 345.244606][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.244884][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 345.245180][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.245491][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 345.245792][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 345.246113][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 345.246413][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 345.246705][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 345.247005][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 345.247396][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.247712][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.248026][ T70] kthread (kernel/kthread.c:388) 
[ 345.248272][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.248574][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 345.248844][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.249176][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.421320][   T70] ------------[ cut here ]------------
| [  345.421787][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 345.422409][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.423187][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  345.424752][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.425908][   T70] Workqueue: netns cleanup_net
[ 345.426367][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.426718][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  345.428135][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  345.428633][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  345.429286][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  345.429868][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  345.430382][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006022628
[  345.430813][   T70] R13: ffff888006022df8 R14: ffffc9000050fc98 R15: ffff888006022bc0
[  345.431513][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  345.432089][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.432488][   T70] CR2: 00007fa0ad812000 CR3: 000000001eb34002 CR4: 00000000001706f0
[  345.432990][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.433502][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.433988][   T70] Call Trace:
[  345.434176][   T70]  <TASK>
[ 345.434374][ T70] ? __warn (kernel/panic.c:677) 
[ 345.434635][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 345.434934][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.435365][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 345.435614][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 345.435850][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 345.436112][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 345.436393][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 345.436635][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.436917][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 345.437181][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 345.437475][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 345.437720][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.438021][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 345.438344][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.438635][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 345.439069][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 345.439423][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 345.439758][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 345.440055][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 345.440367][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 345.440765][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.441102][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.441429][ T70] kthread (kernel/kthread.c:388) 
[ 345.441681][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.441987][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 345.442262][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.442556][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.634433][   T70] ------------[ cut here ]------------
| [  345.634812][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 345.635230][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.635786][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  345.636741][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.637543][   T70] Workqueue: netns cleanup_net
[ 345.637878][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.638220][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  345.639414][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  345.639761][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  345.640251][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  345.640707][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  345.641199][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880081f2628
[  345.641696][   T70] R13: ffff8880081f2df8 R14: ffffc9000050fc98 R15: ffff8880081f2bc0
[  345.642165][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  345.642682][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.643053][   T70] CR2: 00007f120d9dd2a0 CR3: 000000001eb34004 CR4: 00000000001706f0
[  345.643520][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.643970][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.644427][   T70] Call Trace:
[  345.644618][   T70]  <TASK>
[ 345.644794][ T70] ? __warn (kernel/panic.c:677) 
[ 345.645035][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.645340][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 345.645600][ T70] ? restore_regs_and_return_to_kernel (arch/x86/entry/entry_64.S:658) 
[ 345.645964][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 345.646224][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 345.646499][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 345.646791][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 345.647049][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.647359][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 345.647631][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 345.647935][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 345.648200][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.648471][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 345.648752][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.649028][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 345.649327][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 345.649595][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 345.649886][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 345.650133][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 345.650397][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 345.650747][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.651018][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.651298][ T70] kthread (kernel/kthread.c:388) 
[ 345.651555][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.651860][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 345.652102][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.652388][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.858517][   T70] ------------[ cut here ]------------
| [  345.858876][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 345.859300][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.859887][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  345.860819][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.861469][   T70] Workqueue: netns cleanup_net
[ 345.861738][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.862058][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  345.863177][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  345.863512][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  345.863969][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  345.864432][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  345.864913][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006a9a628
[  345.865377][   T70] R13: ffff888006a9adf8 R14: ffffc9000050fc98 R15: ffff888006a9abc0
[  345.865858][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  345.866399][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.866801][   T70] CR2: 00007fd6273a8270 CR3: 000000001eb34005 CR4: 00000000001706f0
[  345.867260][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.867741][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.868221][   T70] Call Trace:
[  345.868421][   T70]  <TASK>
[ 345.868592][ T70] ? __warn (kernel/panic.c:677) 
[ 345.868856][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 345.869150][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.869476][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 345.869725][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 345.869959][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 345.870222][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 345.870511][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 345.870751][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.871034][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 345.871293][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 345.871578][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 345.871820][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.872071][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 345.872342][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 345.872608][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 345.872912][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 345.873216][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 345.873536][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 345.873804][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 345.874106][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 345.874480][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.874785][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 345.875090][ T70] kthread (kernel/kthread.c:388) 
[ 345.875337][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.875608][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 345.875889][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 345.876157][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  365.011078][   T70] ------------[ cut here ]------------
| [  365.011571][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 365.012135][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  365.012868][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  365.014185][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  365.015090][   T70] Workqueue: netns cleanup_net
[ 365.015472][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.015934][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  365.017138][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  365.017522][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  365.017975][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  365.018447][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  365.018929][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800966a628
[  365.019398][   T70] R13: ffff88800966adf8 R14: ffffc9000050fc98 R15: ffff88800966abc0
[  365.019848][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  365.020369][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.020766][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304006 CR4: 00000000001706f0
[  365.021234][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  365.021684][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  365.022153][   T70] Call Trace:
[  365.022387][   T70]  <TASK>
[ 365.022555][ T70] ? __warn (kernel/panic.c:677) 
[ 365.022805][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 365.023121][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.023499][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 365.023783][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 365.024063][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 365.024378][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 365.024766][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 365.025134][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.025578][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 365.025965][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 365.026394][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 365.026760][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.027151][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 365.027561][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.027934][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 365.028350][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 365.028784][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 365.029225][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 365.029567][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 365.029951][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 365.030392][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.030713][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.031028][ T70] kthread (kernel/kthread.c:388) 
[ 365.031349][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.031640][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 365.031924][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.032251][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  365.211592][   T70] ------------[ cut here ]------------
| [  365.211995][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 365.212622][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  365.213390][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  365.214700][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  365.215667][   T70] Workqueue: netns cleanup_net
[ 365.216054][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.216530][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  365.217907][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  365.218240][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  365.218666][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  365.219102][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  365.219546][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888002012628
[  365.220030][   T70] R13: ffff888002012df8 R14: ffffc9000050fc98 R15: ffff888002012bc0
[  365.220497][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  365.221032][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.221414][   T70] CR2: 00007f10beac0270 CR3: 000000001eb34002 CR4: 00000000001706f0
[  365.221882][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  365.222347][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  365.222805][   T70] Call Trace:
[  365.223019][   T70]  <TASK>
[ 365.223285][ T70] ? __warn (kernel/panic.c:677) 
[ 365.223713][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 365.224235][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.224559][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 365.224838][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 365.225086][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 365.225347][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 365.225643][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 365.225918][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.226230][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 365.226493][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 365.226804][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 365.227080][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.227371][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 365.227649][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.227956][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 365.228373][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 365.228712][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 365.229136][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 365.229487][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 365.229831][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 365.230359][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.230784][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.231203][ T70] kthread (kernel/kthread.c:388) 
[ 365.231540][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.231928][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 365.232272][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.232597][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  365.415352][   T70] ------------[ cut here ]------------
| [  365.415901][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 365.416480][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  365.417225][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  365.418479][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  365.419372][   T70] Workqueue: netns cleanup_net
[ 365.419674][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.420041][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  365.421249][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  365.421596][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  365.422122][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  365.422586][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  365.423067][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880072fa628
[  365.423557][   T70] R13: ffff8880072fadf8 R14: ffffc9000050fc98 R15: ffff8880072fabc0
[  365.424049][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  365.424581][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.424972][   T70] CR2: 00007f2f47698000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  365.425466][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  365.425980][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  365.426456][   T70] Call Trace:
[  365.426663][   T70]  <TASK>
[ 365.426842][ T70] ? __warn (kernel/panic.c:677) 
[ 365.427076][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 365.427370][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.427695][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 365.427949][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 365.428188][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 365.428453][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 365.428741][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 365.428989][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.429277][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 365.429530][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 365.429812][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 365.430055][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.430318][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 365.430593][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.430881][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 365.431188][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 365.431505][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 365.431827][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 365.432107][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 365.432393][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 365.432803][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.433095][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.433432][ T70] kthread (kernel/kthread.c:388) 
[ 365.433671][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.433932][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 365.434186][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.434461][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  365.590514][   T70] ------------[ cut here ]------------
| [  365.590880][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 365.591340][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  365.591906][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  365.592952][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  365.593646][   T70] Workqueue: netns cleanup_net
[ 365.593925][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.594251][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  365.595594][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  365.596068][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  365.596780][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  365.597470][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  365.598147][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a33a628
[  365.598928][   T70] R13: ffff88800a33adf8 R14: ffffc9000050fc98 R15: ffff88800a33abc0
[  365.599639][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  365.600403][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.600995][   T70] CR2: 00007fdad8e8f000 CR3: 000000001eb34006 CR4: 00000000001706f0
[  365.601707][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  365.602341][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  365.602944][   T70] Call Trace:
[  365.603218][   T70]  <TASK>
[ 365.603431][ T70] ? __warn (kernel/panic.c:677) 
[ 365.603713][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 365.604033][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.604508][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 365.604830][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 365.605147][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 365.605574][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 365.606018][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 365.606442][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 365.606890][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 365.607321][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 365.607802][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 365.608202][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.608626][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 365.609078][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 365.609502][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 365.609947][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 365.610419][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 365.610907][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 365.611324][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 365.611744][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 365.612156][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.612511][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 365.612787][ T70] kthread (kernel/kthread.c:388) 
[ 365.613008][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.613264][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 365.613511][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 365.613763][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  401.430243][   T70] ------------[ cut here ]------------
| [  401.430568][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 401.430948][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  401.431463][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  401.432354][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  401.433097][   T70] Workqueue: netns cleanup_net
[ 401.433409][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.433756][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  401.434846][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  401.435188][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  401.435683][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  401.436112][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  401.436615][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ac4a628
[  401.437109][   T70] R13: ffff88800ac4adf8 R14: ffffc9000050fc98 R15: ffff88800ac4abc0
[  401.437575][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  401.438075][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  401.438437][   T70] CR2: 00007f0942550a30 CR3: 0000000006342005 CR4: 00000000001706f0
[  401.438929][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  401.439437][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  401.439891][   T70] Call Trace:
[  401.440068][   T70]  <TASK>
[ 401.440254][ T70] ? __warn (kernel/panic.c:677) 
[ 401.440477][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 401.440772][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.441090][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 401.441343][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 401.441711][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 401.442059][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 401.442511][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 401.442906][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.443365][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 401.443727][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 401.444133][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 401.444492][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.444857][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 401.445248][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.445614][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 401.446015][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 401.446411][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 401.446832][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 401.447244][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 401.447652][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 401.448236][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.448682][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.449113][ T70] kthread (kernel/kthread.c:388) 
[ 401.449482][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.449886][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 401.450288][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.450681][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  401.653452][   T70] ------------[ cut here ]------------
| [  401.653908][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 401.654484][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  401.655223][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  401.656558][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  401.657628][   T70] Workqueue: netns cleanup_net
[ 401.658047][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.658566][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  401.660119][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  401.660608][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  401.661240][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  401.661930][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  401.662631][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a2aa628
[  401.663318][   T70] R13: ffff88800a2aadf8 R14: ffffc9000050fc98 R15: ffff88800a2aabc0
[  401.663997][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  401.664764][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  401.665332][   T70] CR2: 00007f9467744270 CR3: 000000000d6a6002 CR4: 00000000001706f0
[  401.666019][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  401.666710][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  401.667396][   T70] Call Trace:
[  401.667675][   T70]  <TASK>
[ 401.667935][ T70] ? __warn (kernel/panic.c:677) 
[ 401.668291][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 401.668728][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.669170][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 401.669590][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 401.669961][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 401.670407][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 401.670861][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 401.671222][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.671631][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 401.671995][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 401.672428][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 401.672779][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.673150][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 401.673578][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.673949][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 401.674373][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 401.674766][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 401.675236][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 401.675633][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 401.676005][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 401.676536][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.676940][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.677358][ T70] kthread (kernel/kthread.c:388) 
[ 401.677684][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.678054][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 401.678418][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.678870][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  401.866705][   T70] ------------[ cut here ]------------
| [  401.867058][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 401.867459][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  401.867959][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  401.868969][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  401.869739][   T70] Workqueue: netns cleanup_net
[ 401.870020][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.870390][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  401.871427][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  401.871751][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  401.872171][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  401.872598][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  401.873114][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888002bd2628
[  401.873583][   T70] R13: ffff888002bd2df8 R14: ffffc9000050fc98 R15: ffff888002bd2bc0
[  401.874053][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  401.874565][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  401.874979][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304005 CR4: 00000000001706f0
[  401.875481][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  401.875945][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  401.876457][   T70] Call Trace:
[  401.876646][   T70]  <TASK>
[ 401.876828][ T70] ? __warn (kernel/panic.c:677) 
[ 401.877099][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 401.877402][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.877712][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 401.878025][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 401.878282][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 401.878618][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 401.878912][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 401.879152][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 401.879443][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 401.879701][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 401.879989][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 401.880242][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.880496][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 401.880761][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 401.881015][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 401.881305][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 401.881589][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 401.881939][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 401.882214][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 401.882493][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 401.882887][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.883183][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 401.883493][ T70] kthread (kernel/kthread.c:388) 
[ 401.883746][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.884018][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 401.884298][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 401.884554][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  402.049154][   T70] ------------[ cut here ]------------
| [  402.049680][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 402.050287][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  402.051101][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  402.052500][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  402.053565][   T70] Workqueue: netns cleanup_net
[ 402.054030][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 402.054538][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  402.056038][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  402.056522][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  402.057209][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  402.057877][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  402.058595][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ae0a628
[  402.059284][   T70] R13: ffff88800ae0adf8 R14: ffffc9000050fc98 R15: ffff88800ae0abc0
[  402.059980][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  402.060782][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  402.061382][   T70] CR2: 00007f920c711000 CR3: 000000001eb34005 CR4: 00000000001706f0
[  402.062096][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  402.062751][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  402.063385][   T70] Call Trace:
[  402.063650][   T70]  <TASK>
[ 402.063884][ T70] ? __warn (kernel/panic.c:677) 
[ 402.064222][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 402.064673][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 402.065126][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 402.065556][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 402.065943][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 402.066370][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 402.066819][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 402.067211][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 402.067685][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 402.068077][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 402.068540][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 402.068943][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 402.069365][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 402.069791][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 402.070206][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 402.070667][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 402.071096][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 402.071606][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 402.072019][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 402.072427][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 402.072949][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 402.073369][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 402.073775][ T70] kthread (kernel/kthread.c:388) 
[ 402.074128][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 402.074555][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 402.074956][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 402.075373][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.194381][   T70] ------------[ cut here ]------------
| [  612.194794][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 612.195242][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.195735][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  612.196663][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.197329][   T70] Workqueue: netns cleanup_net
[ 612.197629][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.197960][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  612.199005][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  612.199348][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  612.199768][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  612.200267][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  612.200768][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800cbea628
[  612.201228][   T70] R13: ffff88800cbeadf8 R14: ffffc9000050fc98 R15: ffff88800cbeabc0
[  612.201727][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  612.202245][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.202684][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304004 CR4: 00000000001706f0
[  612.203180][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.203631][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.204062][   T70] Call Trace:
[  612.204254][   T70]  <TASK>
[ 612.204419][ T70] ? __warn (kernel/panic.c:677) 
[ 612.204643][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 612.204920][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.205230][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 612.205478][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 612.205726][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 612.205979][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 612.206281][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 612.206537][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.206843][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 612.207103][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 612.207403][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 612.207688][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.207983][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 612.208306][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.208594][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 612.208923][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 612.209255][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 612.209572][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 612.209870][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 612.210189][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 612.210626][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.210958][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.211312][ T70] kthread (kernel/kthread.c:388) 
[ 612.211581][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.211853][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 612.212128][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.212409][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.413543][   T70] ------------[ cut here ]------------
| [  612.413933][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 612.414404][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.414984][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  612.415903][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.416598][   T70] Workqueue: netns cleanup_net
[ 612.416872][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.417222][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  612.418535][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  612.418880][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  612.419414][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  612.419965][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  612.420532][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007cd2628
[  612.421090][   T70] R13: ffff888007cd2df8 R14: ffffc9000050fc98 R15: ffff888007cd2bc0
[  612.421670][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  612.422317][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.422742][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304004 CR4: 00000000001706f0
[  612.423321][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.423792][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.424378][   T70] Call Trace:
[  612.424576][   T70]  <TASK>
[ 612.424771][ T70] ? __warn (kernel/panic.c:677) 
[ 612.425055][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 612.425401][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.425747][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 612.426080][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 612.426344][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 612.426703][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 612.427026][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 612.427323][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.427714][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 612.427980][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 612.428289][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 612.428547][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.428809][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 612.429092][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.429375][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 612.429715][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 612.430013][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 612.430435][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 612.430751][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 612.431065][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 612.431522][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.431901][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.432232][ T70] kthread (kernel/kthread.c:388) 
[ 612.432512][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.432817][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 612.433143][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.433430][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.595689][   T70] ------------[ cut here ]------------
| [  612.596020][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 612.596429][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.596936][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  612.597945][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.598713][   T70] Workqueue: netns cleanup_net
[ 612.599036][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.599381][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  612.600531][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  612.600940][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  612.601389][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  612.601866][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  612.602357][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b89a628
[  612.602879][   T70] R13: ffff88800b89adf8 R14: ffffc9000050fc98 R15: ffff88800b89abc0
[  612.603345][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  612.603873][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.604300][   T70] CR2: 00007fbfe3fa5270 CR3: 000000001eb34001 CR4: 00000000001706f0
[  612.604775][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.605235][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.605711][   T70] Call Trace:
[  612.605921][   T70]  <TASK>
[ 612.606116][ T70] ? __warn (kernel/panic.c:677) 
[ 612.606380][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 612.606673][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.606999][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 612.607309][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 612.607602][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 612.607857][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 612.608136][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 612.608388][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.608668][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 612.608919][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 612.609237][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 612.609483][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.609741][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 612.610021][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.610320][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 612.610653][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 612.610981][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 612.611321][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 612.611597][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 612.611917][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 612.612341][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.612668][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.612984][ T70] kthread (kernel/kthread.c:388) 
[ 612.613264][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.613594][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 612.613885][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.614172][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.797476][   T70] ------------[ cut here ]------------
| [  612.797829][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 612.798254][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.798842][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  612.799959][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.800679][   T70] Workqueue: netns cleanup_net
[ 612.800994][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.801315][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  612.802402][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  612.802801][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  612.803284][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  612.803725][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  612.804225][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a1ba628
[  612.804692][   T70] R13: ffff88800a1badf8 R14: ffffc9000050fc98 R15: ffff88800a1babc0
[  612.805165][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  612.805668][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.806081][   T70] CR2: 00007fbfe3fa5270 CR3: 000000001eb34001 CR4: 00000000001706f0
[  612.806600][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.807121][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.807795][   T70] Call Trace:
[  612.808017][   T70]  <TASK>
[ 612.808178][ T70] ? __warn (kernel/panic.c:677) 
[ 612.808457][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 612.808777][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.809114][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 612.809404][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 612.809700][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 612.810001][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 612.810327][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 612.810590][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.810907][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 612.811218][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 612.811537][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 612.811807][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.812106][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 612.812473][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 612.812788][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 612.813121][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 612.813464][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 612.813834][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 612.814132][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 612.814447][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 612.814852][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.815186][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 612.815525][ T70] kthread (kernel/kthread.c:388) 
[ 612.815784][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.816072][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 612.816377][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 612.816682][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  652.334459][   T70] ------------[ cut here ]------------
| [  652.334874][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 652.335499][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  652.336298][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  652.337716][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  652.338786][   T70] Workqueue: netns cleanup_net
[ 652.339184][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.339652][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  652.341134][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  652.341646][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  652.342368][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  652.343025][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  652.343746][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bdf2628
[  652.344460][   T70] R13: ffff88800bdf2df8 R14: ffffc9000050fc98 R15: ffff88800bdf2bc0
[  652.345069][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  652.345561][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  652.345937][   T70] CR2: 000055b140770dec CR3: 000000001eb34002 CR4: 00000000001706f0
[  652.346368][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  652.346796][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  652.347223][   T70] Call Trace:
[  652.347419][   T70]  <TASK>
[ 652.347583][ T70] ? __warn (kernel/panic.c:677) 
[ 652.347808][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 652.348065][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.348385][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 652.348701][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 652.348961][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 652.349261][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 652.349588][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 652.349854][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.350205][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 652.350509][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 652.350824][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 652.351135][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 652.351414][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 652.351728][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 652.352031][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 652.352328][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 652.352689][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 652.353028][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 652.353320][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 652.353660][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 652.354052][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 652.354374][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 652.354692][ T70] kthread (kernel/kthread.c:388) 
[ 652.354937][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 652.355243][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 652.355515][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 652.355805][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  652.521495][   T70] ------------[ cut here ]------------
| [  652.521823][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 652.522271][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  652.522810][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  652.523763][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  652.524436][   T70] Workqueue: netns cleanup_net
[ 652.524703][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.525044][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  652.526189][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  652.526546][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  652.527005][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  652.527576][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  652.528029][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008242628
[  652.528487][   T70] R13: ffff888008242df8 R14: ffffc9000050fc98 R15: ffff888008242bc0
[  652.528978][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  652.529473][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  652.529900][   T70] CR2: 000055b140770dec CR3: 000000001eb34002 CR4: 00000000001706f0
[  652.530458][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  652.531063][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  652.531687][   T70] Call Trace:
[  652.531949][   T70]  <TASK>
[ 652.532182][ T70] ? __warn (kernel/panic.c:677) 
[ 652.532517][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 652.532895][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.533317][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 652.533725][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 652.534109][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 652.534519][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 652.534939][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 652.535357][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 652.535800][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 652.536224][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 652.536672][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 652.537062][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 652.537487][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 652.537926][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 652.538351][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 652.538806][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 652.539214][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 652.539633][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 652.539965][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 652.540230][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 652.540581][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 652.540868][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 652.541145][ T70] kthread (kernel/kthread.c:388) 
[ 652.541375][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 652.541624][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 652.541895][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 652.542182][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  655.715187][   T70] ------------[ cut here ]------------
| [  655.715596][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 655.716066][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  655.716712][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  655.717922][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  655.718874][   T70] Workqueue: netns cleanup_net
[ 655.719208][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.719548][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  655.720691][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  655.721083][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  655.721575][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  655.722050][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  655.722493][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800cd62628
[  655.722952][   T70] R13: ffff88800cd62df8 R14: ffffc9000050fc98 R15: ffff88800cd62bc0
[  655.723449][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  655.724016][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  655.724398][   T70] CR2: 00007f3ab57fc400 CR3: 000000001eb34005 CR4: 00000000001706f0
[  655.724893][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  655.725356][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  655.725882][   T70] Call Trace:
[  655.726108][   T70]  <TASK>
[ 655.726314][ T70] ? __warn (kernel/panic.c:677) 
[ 655.726609][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 655.726921][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.727265][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 655.727570][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 655.727803][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 655.728052][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 655.728339][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 655.728586][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.728869][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 655.729124][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 655.729464][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 655.729722][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 655.730030][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 655.730294][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 655.730615][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 655.730901][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 655.731218][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 655.731485][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 655.731754][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 655.732130][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 655.732427][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 655.732718][ T70] kthread (kernel/kthread.c:388) 
[ 655.732956][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 655.733223][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 655.733483][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 655.733750][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  655.736903][   T70] ------------[ cut here ]------------
| [  655.737206][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 655.737598][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  655.738087][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  655.739091][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  655.739752][   T70] Workqueue: netns cleanup_net
[ 655.740011][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.740334][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  655.741374][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  655.741701][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  655.742118][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  655.742551][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  655.742974][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a93a628
[  655.743400][   T70] R13: ffff88800a93adf8 R14: ffffc9000050fc98 R15: ffff88800a93abc0
[  655.743820][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  655.744295][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  655.744659][   T70] CR2: 00007f3ab57fc400 CR3: 000000001eb34005 CR4: 00000000001706f0
[  655.745081][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  655.745509][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  655.745932][   T70] Call Trace:
[  655.746116][   T70]  <TASK>
[ 655.746280][ T70] ? __warn (kernel/panic.c:677) 
[ 655.746519][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 655.746831][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.747268][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 655.747582][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 655.747818][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 655.748068][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 655.748349][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 655.748598][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 655.748883][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 655.749133][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 655.749426][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 655.749673][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 655.749938][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 655.750199][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 655.750481][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 655.750746][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 655.751038][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 655.751293][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 655.751549][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 655.751896][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 655.752168][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 655.752453][ T70] kthread (kernel/kthread.c:388) 
[ 655.752669][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 655.752918][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 655.753157][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 655.753415][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  859.920880][   T70] ------------[ cut here ]------------
| [  859.921201][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 859.921584][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  859.922078][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  859.923117][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  859.923879][   T70] Workqueue: netns cleanup_net
[ 859.924143][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 859.924511][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  859.925609][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  859.925936][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  859.926432][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  859.926856][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  859.927431][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ad5a628
[  859.927905][   T70] R13: ffff88800ad5adf8 R14: ffffc9000050fc98 R15: ffff88800ad5abc0
[  859.928379][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  859.928859][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  859.929219][   T70] CR2: 000055b14071e5a0 CR3: 000000000a458001 CR4: 00000000001706f0
[  859.929650][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  859.930073][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  859.930501][   T70] Call Trace:
[  859.930678][   T70]  <TASK>
[ 859.930838][ T70] ? __warn (kernel/panic.c:677) 
[ 859.931063][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 859.931383][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 859.931755][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 859.932044][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 859.932326][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 859.932627][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 859.932920][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 859.933161][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 859.933448][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 859.933702][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 859.933984][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 859.934235][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 859.934489][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 859.934756][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 859.935009][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 859.935349][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 859.935801][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 859.936323][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 859.936757][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 859.937174][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 859.937762][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 859.938251][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 859.938704][ T70] kthread (kernel/kthread.c:388) 
[ 859.939062][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 859.939457][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 859.939858][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 859.940302][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  860.125160][   T70] ------------[ cut here ]------------
| [  860.125579][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 860.126019][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  860.126604][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  860.127731][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  860.128487][   T70] Workqueue: netns cleanup_net
[ 860.128763][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 860.129095][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  860.130182][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  860.130545][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  860.130991][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  860.131422][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  860.131893][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020512628
[  860.132408][   T70] R13: ffff888020512df8 R14: ffffc9000050fc98 R15: ffff888020512bc0
[  860.132923][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  860.133490][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  860.133910][   T70] CR2: 00007f8329364000 CR3: 000000001eb34006 CR4: 00000000001706f0
[  860.134446][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  860.135092][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  860.135797][   T70] Call Trace:
[  860.136091][   T70]  <TASK>
[ 860.136373][ T70] ? __warn (kernel/panic.c:677) 
[ 860.136748][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 860.137209][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 860.137659][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 860.138105][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 860.138491][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 860.138925][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 860.139349][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 860.139708][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 860.140118][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 860.140496][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 860.140912][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 860.141278][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 860.141682][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 860.142164][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 860.142614][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 860.143070][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 860.143555][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 860.144013][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 860.144432][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 860.144820][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 860.145233][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 860.145530][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 860.145804][ T70] kthread (kernel/kthread.c:388) 
[ 860.146024][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 860.146280][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 860.146537][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 860.146826][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  863.313368][   T70] ------------[ cut here ]------------
| [  863.313745][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 863.314126][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  863.314625][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  863.315659][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  863.316429][   T70] Workqueue: netns cleanup_net
[ 863.316692][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.317005][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  863.318056][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  863.318392][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  863.318812][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  863.319242][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  863.319669][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800dba2628
[  863.320098][   T70] R13: ffff88800dba2df8 R14: ffffc9000050fc98 R15: ffff88800dba2bc0
[  863.320530][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  863.321010][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  863.321370][   T70] CR2: 000055b140770dec CR3: 0000000020304001 CR4: 00000000001706f0
[  863.321796][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  863.322229][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  863.322653][   T70] Call Trace:
[  863.322836][   T70]  <TASK>
[ 863.322999][ T70] ? __warn (kernel/panic.c:677) 
[ 863.323235][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 863.323534][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.323861][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 863.324150][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 863.324454][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 863.324739][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 863.325042][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 863.325332][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.325617][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 863.325867][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 863.326189][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 863.326494][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 863.326803][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 863.327075][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 863.327404][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 863.327711][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 863.328057][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 863.328319][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 863.328608][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 863.328995][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 863.329289][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 863.329594][ T70] kthread (kernel/kthread.c:388) 
[ 863.329815][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 863.330061][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 863.330313][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 863.330599][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  863.333853][   T70] ------------[ cut here ]------------
| [  863.334181][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 863.334605][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  863.335138][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  863.336104][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  863.336823][   T70] Workqueue: netns cleanup_net
[ 863.337139][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.337503][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  863.338567][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  863.338936][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  863.339437][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  863.339905][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  863.340373][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880202ba628
[  863.340839][   T70] R13: ffff8880202badf8 R14: ffffc9000050fc98 R15: ffff8880202babc0
[  863.341308][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  863.341847][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  863.342254][   T70] CR2: 000055b140770dec CR3: 0000000020304001 CR4: 00000000001706f0
[  863.342679][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  863.343100][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  863.343597][   T70] Call Trace:
[  863.343776][   T70]  <TASK>
[ 863.343984][ T70] ? __warn (kernel/panic.c:677) 
[ 863.344217][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 863.344512][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.344818][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 863.345098][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 863.345369][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 863.345682][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 863.345990][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 863.346240][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 863.346533][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 863.346788][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 863.347071][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 863.347321][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 863.347590][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 863.347848][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 863.348127][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 863.348399][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 863.348693][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 863.348945][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 863.349202][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 863.349563][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 863.349837][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 863.350116][ T70] kthread (kernel/kthread.c:388) 
[ 863.350342][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 863.350593][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 863.350837][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 863.351088][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  886.506354][   T70] ------------[ cut here ]------------
| [  886.506713][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 886.507138][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  886.507715][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  886.508683][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  886.509430][   T70] Workqueue: netns cleanup_net
[ 886.509699][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.510023][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  886.511101][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  886.511461][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  886.511905][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  886.512363][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  886.512816][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880059da628
[  886.513285][   T70] R13: ffff8880059dadf8 R14: ffffc9000050fc98 R15: ffff8880059dabc0
[  886.513738][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  886.514252][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  886.514626][   T70] CR2: 00007f5ed303f000 CR3: 000000001eb34003 CR4: 00000000001706f0
[  886.515071][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  886.515535][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  886.515957][   T70] Call Trace:
[  886.516139][   T70]  <TASK>
[ 886.516320][ T70] ? __warn (kernel/panic.c:677) 
[ 886.516544][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 886.516805][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.517129][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 886.517415][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 886.517690][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 886.518043][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 886.518497][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 886.518765][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.519086][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 886.519391][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 886.519728][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 886.519990][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.520265][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 886.520573][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.520849][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 886.521165][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 886.521492][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 886.521809][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 886.522099][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 886.522389][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 886.522788][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.523080][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.523380][ T70] kthread (kernel/kthread.c:388) 
[ 886.523642][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.523904][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 886.524175][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.524474][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  886.709705][   T70] ------------[ cut here ]------------
| [  886.710020][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 886.710464][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  886.710988][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  886.712469][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  886.713165][   T70] Workqueue: netns cleanup_net
[ 886.713431][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.713783][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  886.714857][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  886.715213][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  886.715679][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  886.716139][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  886.716614][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800718a628
[  886.717057][   T70] R13: ffff88800718adf8 R14: ffffc9000050fc98 R15: ffff88800718abc0
[  886.717530][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  886.718053][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  886.718445][   T70] CR2: 00007ffd2ac70ff8 CR3: 000000000c51c002 CR4: 00000000001706f0
[  886.718895][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  886.719355][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  886.719814][   T70] Call Trace:
[  886.720025][   T70]  <TASK>
[ 886.720215][ T70] ? __warn (kernel/panic.c:677) 
[ 886.720478][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 886.720781][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.721095][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 886.721376][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 886.721656][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 886.721965][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 886.722282][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 886.722549][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.722862][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 886.723152][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 886.723492][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 886.723762][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.724060][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 886.724377][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.724660][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 886.724964][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 886.725298][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 886.725630][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 886.725914][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 886.726227][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 886.726622][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.726938][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.727251][ T70] kthread (kernel/kthread.c:388) 
[ 886.727494][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.727781][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 886.728059][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.728311][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  886.911378][   T70] ------------[ cut here ]------------
| [  886.911691][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 886.912073][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  886.912578][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  886.913460][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  886.914106][   T70] Workqueue: netns cleanup_net
[ 886.914374][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.914694][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  886.915847][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  886.916270][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  886.916785][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  886.917299][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  886.917763][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880068c2628
[  886.918301][   T70] R13: ffff8880068c2df8 R14: ffffc9000050fc98 R15: ffff8880068c2bc0
[  886.918776][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  886.919351][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  886.919749][   T70] CR2: 00007f5aa649b000 CR3: 000000001eb34005 CR4: 00000000001706f0
[  886.920247][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  886.920717][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  886.921224][   T70] Call Trace:
[  886.921444][   T70]  <TASK>
[ 886.921652][ T70] ? __warn (kernel/panic.c:677) 
[ 886.921904][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 886.922229][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.922595][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 886.922880][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 886.923165][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 886.923471][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 886.923784][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 886.924065][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 886.924396][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 886.924671][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 886.924957][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 886.925214][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.925469][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 886.925733][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 886.925988][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 886.926416][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 886.926687][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 886.926976][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 886.927254][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 886.927549][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 886.927989][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.928314][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 886.928633][ T70] kthread (kernel/kthread.c:388) 
[ 886.928899][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.929205][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 886.929505][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 886.929788][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  887.102351][   T70] ------------[ cut here ]------------
| [  887.102680][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 887.103058][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  887.103568][   T70] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  887.104451][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  887.105152][   T70] Workqueue: netns cleanup_net
[ 887.105437][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 887.105762][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  887.106957][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  887.107313][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  887.107771][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  887.108202][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  887.108664][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800863a628
[  887.109110][   T70] R13: ffff88800863adf8 R14: ffffc9000050fc98 R15: ffff88800863abc0
[  887.109580][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  887.110095][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  887.110497][   T70] CR2: 00007fc88476f000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  887.110951][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  887.111448][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  887.111957][   T70] Call Trace:
[  887.112163][   T70]  <TASK>
[ 887.112332][ T70] ? __warn (kernel/panic.c:677) 
[ 887.112580][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 887.112876][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 887.113209][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 887.113485][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 887.113737][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 887.114009][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 887.114381][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 887.114741][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 887.115034][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 887.115314][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 887.115614][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 887.115870][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 887.116131][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 887.116460][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 887.116730][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 887.117019][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 887.117306][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 887.117613][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 887.117880][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 887.118144][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 887.118511][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 887.118796][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 887.119113][ T70] kthread (kernel/kthread.c:388) 
[ 887.119370][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 887.119650][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 887.119915][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 887.120183][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  911.892430][   T70] ------------[ cut here ]------------
| [  911.892833][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 911.893266][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  911.893843][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  911.895215][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  911.895939][   T70] Workqueue: netns cleanup_net
[ 911.896326][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 911.896693][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  911.897922][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  911.898272][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  911.898696][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  911.899115][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  911.899547][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a272628
[  911.899967][   T70] R13: ffff88800a272df8 R14: ffffc9000050fc98 R15: ffff88800a272bc0
[  911.900399][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  911.900929][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  911.901359][   T70] CR2: 000055b14071e5a0 CR3: 000000001eb34003 CR4: 00000000001706f0
[  911.901875][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  911.902355][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  911.902859][   T70] Call Trace:
[  911.903055][   T70]  <TASK>
[ 911.903263][ T70] ? __warn (kernel/panic.c:677) 
[ 911.903533][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 911.903840][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 911.904185][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 911.904476][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 911.904745][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 911.905031][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 911.905350][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 911.905628][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 911.905953][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 911.906268][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 911.906619][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 911.906930][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 911.907230][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 911.907563][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 911.907833][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 911.908117][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 911.908404][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 911.908702][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 911.908961][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 911.909238][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 911.909620][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 911.909921][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 911.910257][ T70] kthread (kernel/kthread.c:388) 
[ 911.910532][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 911.910807][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 911.911061][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 911.911337][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  912.077351][   T70] ------------[ cut here ]------------
| [  912.077693][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 912.078136][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  912.078702][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  912.079810][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  912.080468][   T70] Workqueue: netns cleanup_net
[ 912.080730][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.081048][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  912.082085][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  912.082420][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  912.082903][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  912.083357][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  912.083816][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009ba2628
[  912.084306][   T70] R13: ffff888009ba2df8 R14: ffffc9000050fc98 R15: ffff888009ba2bc0
[  912.084800][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  912.085376][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  912.085769][   T70] CR2: 00007f05e3dda270 CR3: 000000001eb34005 CR4: 00000000001706f0
[  912.086268][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  912.086768][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  912.087238][   T70] Call Trace:
[  912.087454][   T70]  <TASK>
[ 912.087644][ T70] ? __warn (kernel/panic.c:677) 
[ 912.087898][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 912.088187][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.088558][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 912.088843][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 912.089145][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 912.089433][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 912.089714][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 912.089959][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.090249][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 912.090514][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 912.090808][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 912.091052][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.091320][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 912.091591][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.091847][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 912.092146][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 912.092441][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 912.092783][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 912.093070][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 912.093360][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 912.093739][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.094048][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.094356][ T70] kthread (kernel/kthread.c:388) 
[ 912.094599][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.094910][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 912.095166][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.095485][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  912.277405][   T70] ------------[ cut here ]------------
| [  912.277725][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 912.278111][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  912.278618][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  912.279643][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  912.280378][   T70] Workqueue: netns cleanup_net
[ 912.280642][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.280982][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  912.282143][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  912.282493][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  912.282965][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  912.283443][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  912.283890][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800631a628
[  912.284383][   T70] R13: ffff88800631adf8 R14: ffffc9000050fc98 R15: ffff88800631abc0
[  912.284837][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  912.285383][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  912.285774][   T70] CR2: 00007f76d0184270 CR3: 000000001eb34005 CR4: 00000000001706f0
[  912.286220][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  912.286642][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  912.287067][   T70] Call Trace:
[  912.287254][   T70]  <TASK>
[ 912.287417][ T70] ? __warn (kernel/panic.c:677) 
[ 912.287645][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 912.287908][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.288205][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 912.288457][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 912.288719][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 912.289001][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 912.289300][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 912.289564][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.289874][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 912.290167][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 912.290486][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 912.290753][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.291036][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 912.291327][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.291625][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 912.291939][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 912.292239][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 912.292563][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 912.292864][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 912.293134][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 912.293526][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.293856][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.294157][ T70] kthread (kernel/kthread.c:388) 
[ 912.294413][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.294689][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 912.294949][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.295249][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  912.453984][   T70] ------------[ cut here ]------------
| [  912.454309][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 912.454755][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  912.455313][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  912.456391][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  912.457033][   T70] Workqueue: netns cleanup_net
[ 912.457349][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.457661][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  912.458787][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  912.459209][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  912.459681][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  912.460143][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  912.460653][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c08a628
[  912.461076][   T70] R13: ffff88800c08adf8 R14: ffffc9000050fc98 R15: ffff88800c08abc0
[  912.461562][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  912.462098][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  912.462499][   T70] CR2: 00007fa62dc9630d CR3: 000000001eb34003 CR4: 00000000001706f0
[  912.462951][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  912.463428][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  912.463898][   T70] Call Trace:
[  912.464121][   T70]  <TASK>
[ 912.464317][ T70] ? __warn (kernel/panic.c:677) 
[ 912.464590][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 912.464903][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.465243][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 912.465524][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 912.465800][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 912.466132][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 912.466458][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 912.466730][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 912.467055][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 912.467374][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 912.467701][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 912.467969][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.468283][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 912.468601][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 912.468898][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 912.469214][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 912.469533][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 912.469877][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 912.470172][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 912.470460][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 912.470861][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.471183][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 912.471521][ T70] kthread (kernel/kthread.c:388) 
[ 912.471771][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.472078][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 912.472384][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 912.472630][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  936.113364][   T70] ------------[ cut here ]------------
| [  936.113721][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 936.114213][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  936.114744][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  936.115925][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  936.116606][   T70] Workqueue: netns cleanup_net
[ 936.116868][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.117184][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  936.118226][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  936.118548][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  936.118969][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  936.119398][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  936.119817][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ab82628
[  936.120271][   T70] R13: ffff88800ab82df8 R14: ffffc9000050fc98 R15: ffff88800ab82bc0
[  936.120746][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  936.121268][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  936.121655][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304004 CR4: 00000000001706f0
[  936.122102][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  936.122571][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  936.123022][   T70] Call Trace:
[  936.123236][   T70]  <TASK>
[ 936.123398][ T70] ? __warn (kernel/panic.c:677) 
[ 936.123665][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.123969][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 936.124257][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 936.124502][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 936.124768][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 936.125072][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 936.125325][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.125627][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 936.125919][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 936.126234][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 936.126486][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.126764][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 936.127060][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.127339][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 936.127633][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 936.127934][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 936.128267][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 936.128539][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 936.128798][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 936.129179][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.129485][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.129763][ T70] kthread (kernel/kthread.c:388) 
[ 936.129983][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.130242][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 936.130482][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.130732][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  936.311865][   T70] ------------[ cut here ]------------
| [  936.312241][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 936.312693][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  936.313300][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  936.314436][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  936.315186][   T70] Workqueue: netns cleanup_net
[ 936.315529][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.315922][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  936.317076][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  936.317503][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  936.318008][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  936.318518][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  936.319016][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800998a628
[  936.319472][   T70] R13: ffff88800998adf8 R14: ffffc9000050fc98 R15: ffff88800998abc0
[  936.319923][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  936.320446][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  936.320816][   T70] CR2: 00007fedaa565000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  936.321273][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  936.321759][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  936.322212][   T70] Call Trace:
[  936.322413][   T70]  <TASK>
[ 936.322630][ T70] ? __warn (kernel/panic.c:677) 
[ 936.322935][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 936.323277][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.323612][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 936.323925][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 936.324216][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 936.324499][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 936.324773][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 936.325059][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.325402][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 936.325692][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 936.326038][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 936.326350][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.326650][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 936.326947][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.327247][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 936.327606][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 936.327883][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 936.328219][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 936.328508][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 936.328760][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 936.329114][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.329402][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.329677][ T70] kthread (kernel/kthread.c:388) 
[ 936.329897][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.330147][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 936.330393][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.330642][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  936.543739][   T70] ------------[ cut here ]------------
| [  936.544100][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 936.544542][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  936.545081][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  936.546211][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  936.546917][   T70] Workqueue: netns cleanup_net
[ 936.547234][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.547607][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  936.548730][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  936.549132][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  936.549650][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  936.550162][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  936.550658][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006642628
[  936.551166][   T70] R13: ffff888006642df8 R14: ffffc9000050fc98 R15: ffff888006642bc0
[  936.551688][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  936.552247][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  936.552666][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34001 CR4: 00000000001706f0
[  936.553182][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  936.553712][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  936.554234][   T70] Call Trace:
[  936.554467][   T70]  <TASK>
[ 936.554648][ T70] ? __warn (kernel/panic.c:677) 
[ 936.554887][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 936.555165][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.555479][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 936.555747][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 936.556011][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 936.556283][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 936.556561][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 936.556798][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.557079][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 936.557357][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 936.557710][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 936.558007][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.558342][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 936.558673][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.558995][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 936.559347][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 936.559683][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 936.560028][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 936.560359][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 936.560684][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 936.561113][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.561455][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.561797][ T70] kthread (kernel/kthread.c:388) 
[ 936.562093][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.562412][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 936.562704][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.563028][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  936.755140][   T70] ------------[ cut here ]------------
| [  936.755679][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 936.756297][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  936.757056][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  936.758706][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  936.759766][   T70] Workqueue: netns cleanup_net
[ 936.760183][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.760716][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  936.762255][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  936.762735][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  936.763367][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  936.763987][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  936.764615][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880099d2628
[  936.765276][   T70] R13: ffff8880099d2df8 R14: ffffc9000050fc98 R15: ffff8880099d2bc0
[  936.765994][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  936.766770][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  936.767304][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304005 CR4: 00000000001706f0
[  936.768011][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  936.768691][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  936.769382][   T70] Call Trace:
[  936.769655][   T70]  <TASK>
[ 936.769927][ T70] ? __warn (kernel/panic.c:677) 
[ 936.770318][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 936.770744][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.771145][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 936.771515][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 936.771857][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 936.772235][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 936.772629][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 936.772981][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 936.773401][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 936.773815][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 936.774313][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 936.774687][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.775111][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 936.775571][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 936.775988][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 936.776437][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 936.776877][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 936.777337][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 936.777761][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 936.778160][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 936.778747][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.779209][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 936.779645][ T70] kthread (kernel/kthread.c:388) 
[ 936.780029][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.780417][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 936.780796][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 936.781225][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  960.768431][   T70] ------------[ cut here ]------------
| [  960.768743][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 960.769132][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  960.769704][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  960.770836][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  960.771542][   T70] Workqueue: netns cleanup_net
[ 960.771807][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.772161][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  960.773237][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  960.773565][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  960.773983][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  960.774425][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  960.774892][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006752628
[  960.775371][   T70] R13: ffff888006752df8 R14: ffffc9000050fc98 R15: ffff888006752bc0
[  960.775828][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  960.776371][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  960.776755][   T70] CR2: 00007f77c8f9c000 CR3: 000000001eb34004 CR4: 00000000001706f0
[  960.777242][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  960.777684][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  960.778141][   T70] Call Trace:
[  960.778333][   T70]  <TASK>
[ 960.778492][ T70] ? __warn (kernel/panic.c:677) 
[ 960.778733][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 960.779022][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.779329][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 960.779583][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 960.779840][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 960.780114][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 960.780416][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 960.780692][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.780996][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 960.781276][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 960.781589][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 960.781840][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 960.782151][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 960.782439][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 960.782728][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 960.783041][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 960.783319][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 960.783608][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 960.783853][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 960.784109][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 960.784472][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 960.784751][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 960.785026][ T70] kthread (kernel/kthread.c:388) 
[ 960.785283][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 960.785575][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 960.785840][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 960.786129][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  960.940774][   T70] ------------[ cut here ]------------
| [  960.941088][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 960.941484][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  960.941982][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  960.943005][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  960.943718][   T70] Workqueue: netns cleanup_net
[ 960.944040][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.944385][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  960.945569][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  960.945949][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  960.946438][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  960.946922][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  960.947413][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800af42628
[  960.947913][   T70] R13: ffff88800af42df8 R14: ffffc9000050fc98 R15: ffff88800af42bc0
[  960.948413][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  960.948961][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  960.949382][   T70] CR2: 00007fef2690b000 CR3: 000000001eb34001 CR4: 00000000001706f0
[  960.949840][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  960.950334][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  960.950794][   T70] Call Trace:
[  960.950971][   T70]  <TASK>
[ 960.951129][ T70] ? __warn (kernel/panic.c:677) 
[ 960.951356][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 960.951620][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.951899][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 960.952144][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 960.952385][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 960.952640][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 960.952913][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 960.953237][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 960.953556][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 960.953844][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 960.954200][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 960.954454][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 960.954743][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 960.955075][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 960.955343][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 960.955691][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 960.956015][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 960.956346][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 960.956654][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 960.956916][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 960.957330][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 960.957633][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 960.957959][ T70] kthread (kernel/kthread.c:388) 
[ 960.958230][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 960.958496][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 960.958796][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 960.959068][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  961.126327][   T70] ------------[ cut here ]------------
| [  961.126642][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 961.127063][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  961.127588][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  961.128684][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  961.129418][   T70] Workqueue: netns cleanup_net
[ 961.129725][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.130067][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  961.131233][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  961.131578][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  961.132042][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  961.132508][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  961.132997][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b622628
[  961.133482][   T70] R13: ffff88800b622df8 R14: ffffc9000050fc98 R15: ffff88800b622bc0
[  961.133934][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  961.134486][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  961.134885][   T70] CR2: 00007fa9e4d6d270 CR3: 000000001eb34003 CR4: 00000000001706f0
[  961.135318][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  961.135749][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  961.136187][   T70] Call Trace:
[  961.136378][   T70]  <TASK>
[ 961.136538][ T70] ? __warn (kernel/panic.c:677) 
[ 961.136761][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 961.137022][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.137310][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 961.137556][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 961.137791][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 961.138040][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 961.138335][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 961.138580][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.138885][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 961.139163][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 961.139484][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 961.139733][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 961.140043][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 961.140362][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 961.140643][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 961.140932][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 961.141230][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 961.141550][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 961.141814][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 961.142086][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 961.142470][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 961.142774][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 961.143068][ T70] kthread (kernel/kthread.c:388) 
[ 961.143297][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 961.143574][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 961.143840][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 961.144108][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  961.321447][   T70] ------------[ cut here ]------------
| [  961.321795][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 961.322231][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  961.322784][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  961.323954][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  961.324643][   T70] Workqueue: netns cleanup_net
[ 961.324904][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.325231][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  961.326310][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  961.326692][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  961.327155][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  961.327760][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  961.328398][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800959a628
[  961.329059][   T70] R13: ffff88800959adf8 R14: ffffc9000050fc98 R15: ffff88800959abc0
[  961.329732][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  961.330557][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  961.331139][   T70] CR2: 00007f1afd85b000 CR3: 000000001eb34003 CR4: 00000000001706f0
[  961.331865][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  961.332561][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  961.333307][   T70] Call Trace:
[  961.333592][   T70]  <TASK>
[ 961.333867][ T70] ? __warn (kernel/panic.c:677) 
[ 961.334236][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 961.334618][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.335033][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 961.335411][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 961.335747][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 961.336186][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 961.336664][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 961.337034][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 961.337388][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 961.337681][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 961.338009][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 961.338284][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 961.338603][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 961.338903][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 961.339213][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 961.339546][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 961.339837][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 961.340211][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 961.340482][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 961.340783][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 961.341213][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 961.341513][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 961.341787][ T70] kthread (kernel/kthread.c:388) 
[ 961.342017][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 961.342272][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 961.342510][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 961.342759][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  985.412713][   T70] ------------[ cut here ]------------
| [  985.413080][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 985.413508][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  985.414086][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  985.415278][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  985.415949][   T70] Workqueue: netns cleanup_net
[ 985.416282][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.416626][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  985.417761][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  985.418090][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  985.418527][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  985.418954][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  985.419388][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800984a628
[  985.419848][   T70] R13: ffff88800984adf8 R14: ffffc9000050fc98 R15: ffff88800984abc0
[  985.420348][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  985.420870][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  985.421284][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34004 CR4: 00000000001706f0
[  985.421784][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  985.422254][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  985.422746][   T70] Call Trace:
[  985.422962][   T70]  <TASK>
[ 985.423150][ T70] ? __warn (kernel/panic.c:677) 
[ 985.423423][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 985.423735][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.424056][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 985.424362][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 985.424638][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 985.424923][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 985.425253][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 985.425536][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.425892][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 985.426168][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 985.426540][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 985.426811][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.427078][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 985.427417][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.427704][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 985.427997][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 985.428309][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 985.428630][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 985.428888][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 985.429169][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 985.429567][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.429846][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.430120][ T70] kthread (kernel/kthread.c:388) 
[ 985.430353][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.430620][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 985.430892][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.431139][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  985.616430][   T70] ------------[ cut here ]------------
| [  985.616750][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 985.617180][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  985.617791][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  985.618916][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  985.619618][   T70] Workqueue: netns cleanup_net
[ 985.619938][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.620319][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  985.621412][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  985.621738][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  985.622156][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  985.622585][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  985.623035][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020512628
[  985.623556][   T70] R13: ffff888020512df8 R14: ffffc9000050fc98 R15: ffff888020512bc0
[  985.624229][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  985.624878][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  985.625411][   T70] CR2: 00007f877ff0e270 CR3: 000000001eb34003 CR4: 00000000001706f0
[  985.625902][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  985.626499][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  985.627096][   T70] Call Trace:
[  985.627342][   T70]  <TASK>
[ 985.627558][ T70] ? __warn (kernel/panic.c:677) 
[ 985.627812][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 985.628092][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.628554][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 985.628913][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 985.629186][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 985.629498][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 985.629816][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 985.630149][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.630629][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 985.631017][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 985.631497][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 985.631890][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.632314][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 985.632733][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.633154][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 985.633579][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 985.633951][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 985.634347][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 985.634647][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 985.634998][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 985.635514][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.635866][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.636165][ T70] kthread (kernel/kthread.c:388) 
[ 985.636477][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.636763][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 985.637036][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.637343][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  985.816670][   T70] ------------[ cut here ]------------
| [  985.817097][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 985.817553][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  985.818210][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  985.819590][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  985.820481][   T70] Workqueue: netns cleanup_net
[ 985.820894][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.821380][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  985.822757][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  985.823206][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  985.823836][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  985.824429][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  985.825032][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880083b2628
[  985.825626][   T70] R13: ffff8880083b2df8 R14: ffffc9000050fc98 R15: ffff8880083b2bc0
[  985.826141][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  985.826823][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  985.827318][   T70] CR2: 00007f62619b1270 CR3: 000000001eb34003 CR4: 00000000001706f0
[  985.827803][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  985.828429][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  985.828993][   T70] Call Trace:
[  985.829267][   T70]  <TASK>
[ 985.829495][ T70] ? __warn (kernel/panic.c:677) 
[ 985.829773][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 985.830065][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.830403][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 985.830690][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 985.831047][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 985.831393][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 985.831762][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 985.832047][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 985.832423][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 985.832714][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 985.833077][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 985.833432][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.833759][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 985.834043][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 985.834411][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 985.834813][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 985.835207][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 985.835649][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 985.836034][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 985.836347][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 985.836789][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.837160][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 985.837504][ T70] kthread (kernel/kthread.c:388) 
[ 985.837779][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.838079][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 985.838373][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 985.838705][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  986.030424][   T70] ------------[ cut here ]------------
| [  986.030810][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 986.031203][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  986.031693][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  986.032864][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  986.033579][   T70] Workqueue: netns cleanup_net
[ 986.033850][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 986.034187][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  986.035370][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[  986.035729][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[  986.036228][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  986.036701][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[  986.037207][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b482628
[  986.037675][   T70] R13: ffff88800b482df8 R14: ffffc9000050fc98 R15: ffff88800b482bc0
[  986.038173][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  986.038700][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  986.039102][   T70] CR2: 00007f509098d000 CR3: 000000001eb34005 CR4: 00000000001706f0
[  986.039619][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  986.040063][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  986.040614][   T70] Call Trace:
[  986.040792][   T70]  <TASK>
[ 986.041031][ T70] ? __warn (kernel/panic.c:677) 
[ 986.041269][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 986.041599][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 986.041886][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 986.042178][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 986.042479][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 986.042771][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 986.043011][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 986.043346][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 986.043657][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 986.043977][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 986.044244][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 986.044560][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 986.044969][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 986.045422][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 986.045873][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 986.046203][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 986.046538][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 986.046813][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 986.047104][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 986.047495][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 986.047808][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 986.048100][ T70] kthread (kernel/kthread.c:388) 
[ 986.048329][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 986.048602][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 986.048910][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 986.049159][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1006.900624][   T70] ------------[ cut here ]------------
| [ 1006.901031][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1006.901460][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1006.902052][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1006.903350][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1006.904085][   T70] Workqueue: netns cleanup_net
[ 1006.904443][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1006.904802][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1006.906228][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1006.906634][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1006.907142][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1006.907679][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1006.908198][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c132628
[ 1006.908671][   T70] R13: ffff88800c132df8 R14: ffffc9000050fc98 R15: ffff88800c132bc0
[ 1006.909106][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1006.909596][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1006.909956][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1006.910397][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1006.910834][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1006.911304][   T70] Call Trace:
[ 1006.911501][   T70]  <TASK>
[ 1006.911694][ T70] ? __warn (kernel/panic.c:677) 
[ 1006.911955][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1006.912254][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1006.912605][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1006.912895][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1006.913168][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1006.913464][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1006.913782][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1006.914065][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1006.914386][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1006.914687][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1006.915026][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1006.915310][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1006.915604][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1006.915935][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1006.916229][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1006.916543][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1006.916849][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1006.917178][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1006.917464][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1006.917789][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1006.918167][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1006.918487][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1006.918803][ T70] kthread (kernel/kthread.c:388) 
[ 1006.919062][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1006.919330][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1006.919588][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1006.919847][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1007.087443][   T70] ------------[ cut here ]------------
| [ 1007.087758][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1007.088133][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1007.088637][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1007.089730][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1007.090446][   T70] Workqueue: netns cleanup_net
[ 1007.090857][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.091366][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1007.092617][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1007.092977][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1007.093458][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1007.093921][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1007.094375][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800948a628
[ 1007.094821][   T70] R13: ffff88800948adf8 R14: ffffc9000050fc98 R15: ffff88800948abc0
[ 1007.095308][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1007.095936][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1007.096403][   T70] CR2: 00007ff6b5a16000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1007.096873][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1007.097449][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1007.097958][   T70] Call Trace:
[ 1007.098199][   T70]  <TASK>
[ 1007.098394][ T70] ? __warn (kernel/panic.c:677) 
[ 1007.098655][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1007.099125][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.099590][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1007.099991][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1007.100383][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1007.100797][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1007.101242][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1007.101634][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.102072][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1007.102487][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1007.102968][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1007.103350][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1007.103824][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1007.104243][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1007.104713][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1007.105141][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1007.105688][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1007.105952][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1007.106226][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1007.106587][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.106866][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.107145][ T70] kthread (kernel/kthread.c:388) 
[ 1007.107373][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.107631][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1007.107877][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.108128][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1007.289453][   T70] ------------[ cut here ]------------
| [ 1007.289794][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1007.290253][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1007.290750][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1007.291786][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1007.292601][   T70] Workqueue: netns cleanup_net
[ 1007.292884][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.293231][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1007.294353][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1007.294700][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1007.295170][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1007.295642][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1007.296166][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bd5a628
[ 1007.296652][   T70] R13: ffff88800bd5adf8 R14: ffffc9000050fc98 R15: ffff88800bd5abc0
[ 1007.297180][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1007.297702][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1007.298117][   T70] CR2: 00007f7548be1270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1007.298629][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1007.299109][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1007.299664][   T70] Call Trace:
[ 1007.299862][   T70]  <TASK>
[ 1007.300051][ T70] ? __warn (kernel/panic.c:677) 
[ 1007.300315][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1007.300591][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.300894][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1007.301163][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1007.301428][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1007.301705][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1007.302005][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1007.302274][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.302582][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1007.302886][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1007.303177][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1007.303481][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1007.303751][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1007.304030][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1007.304339][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1007.304620][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1007.304887][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1007.305181][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1007.305442][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1007.305883][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1007.306281][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.306604][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.306930][ T70] kthread (kernel/kthread.c:388) 
[ 1007.307184][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.307485][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1007.307752][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.308034][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1007.513979][   T70] ------------[ cut here ]------------
| [ 1007.514426][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1007.515018][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1007.515825][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1007.517283][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1007.518213][   T70] Workqueue: netns cleanup_net
[ 1007.518584][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.519138][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1007.520714][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1007.521102][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1007.521594][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1007.522041][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1007.522547][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800aa2a628
[ 1007.522992][   T70] R13: ffff88800aa2adf8 R14: ffffc9000050fc98 R15: ffff88800aa2abc0
[ 1007.523498][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1007.524005][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1007.524406][   T70] CR2: 00007f175465f270 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1007.524899][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1007.525343][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1007.525853][   T70] Call Trace:
[ 1007.526054][   T70]  <TASK>
[ 1007.526226][ T70] ? __warn (kernel/panic.c:677) 
[ 1007.526474][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1007.526762][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.527080][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1007.527355][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1007.527629][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1007.527929][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1007.528219][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1007.528491][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1007.528778][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1007.529037][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1007.529328][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1007.529603][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1007.529914][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1007.530308][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1007.530640][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1007.531042][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1007.531439][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1007.531866][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1007.532287][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1007.532666][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1007.533224][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.533648][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1007.534079][ T70] kthread (kernel/kthread.c:388) 
[ 1007.534426][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.534793][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1007.535166][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1007.535563][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1028.917605][   T70] ------------[ cut here ]------------
| [ 1028.917956][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1028.918380][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1028.918872][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1028.919895][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1028.920553][   T70] Workqueue: netns cleanup_net
[ 1028.920816][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1028.921134][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1028.922210][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1028.922537][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1028.922980][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1028.923462][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1028.923906][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009832628
[ 1028.924410][   T70] R13: ffff888009832df8 R14: ffffc9000050fc98 R15: ffff888009832bc0
[ 1028.925022][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1028.925543][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1028.925897][   T70] CR2: 000055b141564938 CR3: 0000000006342001 CR4: 00000000001706f0
[ 1028.926327][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1028.926754][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1028.927186][   T70] Call Trace:
[ 1028.927377][   T70]  <TASK>
[ 1028.927546][ T70] ? __warn (kernel/panic.c:677) 
[ 1028.927776][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1028.928036][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1028.928327][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1028.928612][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1028.928897][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1028.929154][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1028.929462][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1028.929726][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1028.930035][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1028.930298][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1028.930590][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1028.930833][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1028.931108][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1028.931416][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1028.931725][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1028.932009][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1028.932302][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1028.932627][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1028.932899][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1028.933163][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1028.933560][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1028.933867][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1028.934182][ T70] kthread (kernel/kthread.c:388) 
[ 1028.934413][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1028.934682][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1028.934945][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1028.935227][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1029.139584][   T70] ------------[ cut here ]------------
| [ 1029.139988][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1029.140443][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1029.141042][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1029.142090][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1029.142749][   T70] Workqueue: netns cleanup_net
[ 1029.143014][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.143336][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1029.144402][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1029.144754][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1029.145177][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1029.145643][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1029.146085][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880060b2628
[ 1029.146574][   T70] R13: ffff8880060b2df8 R14: ffffc9000050fc98 R15: ffff8880060b2bc0
[ 1029.147143][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1029.147722][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1029.148159][   T70] CR2: 00007f6caf2ca000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1029.148684][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1029.149169][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1029.149704][   T70] Call Trace:
[ 1029.149901][   T70]  <TASK>
[ 1029.150064][ T70] ? __warn (kernel/panic.c:677) 
[ 1029.150349][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1029.150638][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.150937][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1029.151242][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1029.151527][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1029.151802][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1029.152136][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1029.152409][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.152739][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1029.153018][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1029.153335][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1029.153621][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.153902][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1029.154208][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.154513][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1029.154870][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1029.155168][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1029.155565][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1029.155853][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1029.156175][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1029.156712][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.156988][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.157269][ T70] kthread (kernel/kthread.c:388) 
[ 1029.157524][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.157778][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1029.158037][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.158303][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1029.344508][   T70] ------------[ cut here ]------------
| [ 1029.344872][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1029.345342][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1029.345890][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1029.346922][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1029.347581][   T70] Workqueue: netns cleanup_net
[ 1029.347848][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.348161][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1029.349208][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1029.349532][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1029.349955][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1029.350389][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1029.350816][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a2ba628
[ 1029.351291][   T70] R13: ffff88800a2badf8 R14: ffffc9000050fc98 R15: ffff88800a2babc0
[ 1029.351816][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1029.352354][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1029.352706][   T70] CR2: 00007f6caf2ca000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1029.353214][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1029.353706][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1029.354200][   T70] Call Trace:
[ 1029.354391][   T70]  <TASK>
[ 1029.354580][ T70] ? __warn (kernel/panic.c:677) 
[ 1029.354848][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1029.355153][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.355451][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1029.355701][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1029.355986][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1029.356287][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1029.356599][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1029.356871][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.357219][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1029.357498][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1029.357858][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1029.358141][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.358421][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1029.358766][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.359050][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1029.359348][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1029.359681][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1029.360002][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1029.360308][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1029.360600][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1029.360988][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.361326][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.361613][ T70] kthread (kernel/kthread.c:388) 
[ 1029.361836][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.362089][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1029.362334][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.362585][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1029.554661][   T70] ------------[ cut here ]------------
| [ 1029.555034][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1029.555440][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1029.555948][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1029.557000][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1029.557720][   T70] Workqueue: netns cleanup_net
[ 1029.558039][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.558415][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1029.559613][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1029.559989][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1029.560468][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1029.560964][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1029.561483][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b502628
[ 1029.561943][   T70] R13: ffff88800b502df8 R14: ffffc9000050fc98 R15: ffff88800b502bc0
[ 1029.562429][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1029.562932][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1029.563340][   T70] CR2: 00007f611534b000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1029.563814][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1029.564336][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1029.564811][   T70] Call Trace:
[ 1029.565027][   T70]  <TASK>
[ 1029.565219][ T70] ? __warn (kernel/panic.c:677) 
[ 1029.565472][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1029.565770][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.566114][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1029.566387][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1029.566734][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1029.567015][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1029.567298][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1029.567550][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1029.567830][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1029.568082][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1029.568374][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1029.568627][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.568881][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1029.569162][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1029.569460][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1029.569789][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1029.570081][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1029.570433][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1029.570729][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1029.571023][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1029.571472][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.571794][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1029.572108][ T70] kthread (kernel/kthread.c:388) 
[ 1029.572373][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.572665][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1029.572939][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1029.573261][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1050.796469][   T70] ------------[ cut here ]------------
| [ 1050.796833][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1050.797266][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1050.797787][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1050.799145][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1050.799887][   T70] Workqueue: netns cleanup_net
[ 1050.800189][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1050.800524][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1050.801568][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1050.801892][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1050.802327][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1050.802751][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1050.803171][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800aa7a628
[ 1050.803602][   T70] R13: ffff88800aa7adf8 R14: ffffc9000050fc98 R15: ffff88800aa7abc0
[ 1050.804022][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1050.804529][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1050.804953][   T70] CR2: 00007f0942550a30 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1050.805477][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1050.805906][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1050.806386][   T70] Call Trace:
[ 1050.806563][   T70]  <TASK>
[ 1050.806744][ T70] ? __warn (kernel/panic.c:677) 
[ 1050.806968][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1050.807233][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1050.807518][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1050.807768][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1050.808007][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1050.808266][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1050.808542][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1050.808785][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1050.809062][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1050.809322][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1050.809608][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1050.809848][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1050.810126][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1050.810433][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1050.810719][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1050.811025][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1050.811314][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1050.811633][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1050.811929][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1050.812223][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1050.812609][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1050.812927][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1050.813239][ T70] kthread (kernel/kthread.c:388) 
[ 1050.813495][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1050.813788][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1050.814052][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1050.814313][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1051.015006][   T70] ------------[ cut here ]------------
| [ 1051.015346][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1051.015729][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1051.016241][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1051.017469][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1051.018183][   T70] Workqueue: netns cleanup_net
[ 1051.018472][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.018811][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1051.019920][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1051.020301][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1051.020748][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1051.021217][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1051.021650][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880063ba628
[ 1051.022071][   T70] R13: ffff8880063badf8 R14: ffffc9000050fc98 R15: ffff8880063babc0
[ 1051.022502][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1051.022976][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1051.023337][   T70] CR2: 00007fcfc7e15000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1051.023807][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1051.024253][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1051.024742][   T70] Call Trace:
[ 1051.024944][   T70]  <TASK>
[ 1051.025107][ T70] ? __warn (kernel/panic.c:677) 
[ 1051.025352][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1051.025650][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.025947][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1051.026205][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1051.026483][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1051.026755][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1051.027068][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1051.027350][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.027656][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1051.027960][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1051.028277][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1051.028541][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.028829][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1051.029126][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.029437][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1051.029749][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1051.030041][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1051.030385][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1051.030674][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1051.031052][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1051.031697][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.032146][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.032568][ T70] kthread (kernel/kthread.c:388) 
[ 1051.032898][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.033284][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1051.033644][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.034013][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1051.199999][   T70] ------------[ cut here ]------------
| [ 1051.200334][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1051.200729][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1051.201286][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1051.202422][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1051.203155][   T70] Workqueue: netns cleanup_net
[ 1051.203434][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.203818][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1051.205007][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1051.205419][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1051.205887][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1051.206377][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1051.206852][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b5da628
[ 1051.207348][   T70] R13: ffff88800b5dadf8 R14: ffffc9000050fc98 R15: ffff88800b5dabc0
[ 1051.207843][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1051.208358][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1051.208716][   T70] CR2: 00007fa2c69e5270 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1051.209144][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1051.209581][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1051.210016][   T70] Call Trace:
[ 1051.210207][   T70]  <TASK>
[ 1051.210367][ T70] ? __warn (kernel/panic.c:677) 
[ 1051.210591][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1051.210884][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.211217][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1051.211505][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1051.211775][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1051.212082][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1051.212392][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1051.212669][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.213012][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1051.213287][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1051.213642][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1051.213909][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.214203][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1051.214515][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.214807][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1051.215123][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1051.215465][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1051.215775][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1051.216076][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1051.216353][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1051.216754][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.217073][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.217388][ T70] kthread (kernel/kthread.c:388) 
[ 1051.217647][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.217930][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1051.218202][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.218502][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1051.393521][   T70] ------------[ cut here ]------------
| [ 1051.393895][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1051.394351][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1051.394933][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1051.396155][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1051.396852][   T70] Workqueue: netns cleanup_net
[ 1051.397208][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.397579][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1051.398772][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1051.399186][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1051.399629][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1051.400076][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1051.400520][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888004682628
[ 1051.400968][   T70] R13: ffff888004682df8 R14: ffffc9000050fc98 R15: ffff888004682bc0
[ 1051.401431][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1051.402032][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1051.402414][   T70] CR2: 00007f1b04e42000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1051.402941][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1051.403424][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1051.403943][   T70] Call Trace:
[ 1051.404141][   T70]  <TASK>
[ 1051.404356][ T70] ? __warn (kernel/panic.c:677) 
[ 1051.404633][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1051.404951][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.405277][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1051.405578][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1051.405858][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1051.406139][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1051.406458][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1051.406736][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1051.407049][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1051.407340][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1051.407658][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1051.407939][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.408245][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1051.408553][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1051.408849][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1051.409170][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1051.409480][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1051.409839][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1051.410115][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1051.410395][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1051.410807][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.411116][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1051.411418][ T70] kthread (kernel/kthread.c:388) 
[ 1051.411648][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.411907][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1051.412153][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1051.412418][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1072.879638][   T70] ------------[ cut here ]------------
| [ 1072.880014][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1072.880451][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1072.880982][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1072.882100][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1072.882779][   T70] Workqueue: netns cleanup_net
[ 1072.883053][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1072.883381][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1072.884421][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1072.884749][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1072.885169][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1072.885616][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1072.886035][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bf9a628
[ 1072.886462][   T70] R13: ffff88800bf9adf8 R14: ffffc9000050fc98 R15: ffff88800bf9abc0
[ 1072.886897][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1072.887378][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1072.887732][   T70] CR2: 000055a65e6aa028 CR3: 0000000006342003 CR4: 00000000001706f0
[ 1072.888154][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1072.888605][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1072.889110][   T70] Call Trace:
[ 1072.889350][   T70]  <TASK>
[ 1072.889519][ T70] ? __warn (kernel/panic.c:677) 
[ 1072.889762][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1072.890059][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1072.890379][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1072.890667][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1072.890903][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1072.891159][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1072.891463][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1072.891750][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1072.892055][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1072.892322][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1072.892622][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1072.892917][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1072.893170][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1072.893457][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1072.893719][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1072.894042][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1072.894339][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1072.894643][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1072.894899][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1072.895211][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1072.895593][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1072.895893][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1072.896173][ T70] kthread (kernel/kthread.c:388) 
[ 1072.896424][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1072.896700][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1072.896964][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1072.897242][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1073.091386][   T70] ------------[ cut here ]------------
| [ 1073.091712][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1073.092100][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1073.092630][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1073.093819][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1073.094572][   T70] Workqueue: netns cleanup_net
[ 1073.094874][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.095248][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1073.096428][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1073.096759][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1073.097200][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1073.097632][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1073.098062][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b0fa628
[ 1073.098491][   T70] R13: ffff88800b0fadf8 R14: ffffc9000050fc98 R15: ffff88800b0fabc0
[ 1073.098937][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1073.099546][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1073.099930][   T70] CR2: 00007fe6c6c82000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1073.100414][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1073.100880][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1073.101389][   T70] Call Trace:
[ 1073.101595][   T70]  <TASK>
[ 1073.101784][ T70] ? __warn (kernel/panic.c:677) 
[ 1073.102064][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1073.102347][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.102690][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1073.102935][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1073.103172][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1073.103437][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1073.103712][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1073.103952][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.104242][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1073.104501][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1073.104785][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1073.105029][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.105301][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1073.105576][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.105850][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1073.106139][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1073.106460][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1073.106792][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1073.107084][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1073.107388][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1073.107777][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.108179][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.108562][ T70] kthread (kernel/kthread.c:388) 
[ 1073.108864][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.109145][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1073.109502][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.109826][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1073.293476][   T70] ------------[ cut here ]------------
| [ 1073.293845][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1073.294304][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1073.294925][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1073.296071][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1073.296812][   T70] Workqueue: netns cleanup_net
[ 1073.297111][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.297504][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1073.298677][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1073.299010][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1073.299450][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1073.299889][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1073.300332][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b13a628
[ 1073.300777][   T70] R13: ffff88800b13adf8 R14: ffffc9000050fc98 R15: ffff88800b13abc0
[ 1073.301310][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1073.301872][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1073.302238][   T70] CR2: 00007f1051821270 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1073.302741][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1073.303258][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1073.303756][   T70] Call Trace:
[ 1073.303949][   T70]  <TASK>
[ 1073.304161][ T70] ? __warn (kernel/panic.c:677) 
[ 1073.304434][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1073.304740][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.305073][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1073.305413][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1073.305664][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1073.305955][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1073.306300][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1073.306548][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.306834][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1073.307089][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1073.307387][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1073.307632][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.307888][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1073.308155][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.308468][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1073.308781][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1073.309111][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1073.309424][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1073.309734][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1073.310026][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1073.310430][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.310775][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.311072][ T70] kthread (kernel/kthread.c:388) 
[ 1073.311350][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.311638][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1073.311900][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.312236][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1073.487698][   T70] ------------[ cut here ]------------
| [ 1073.488049][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1073.488479][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1073.489021][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1073.490145][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1073.490893][   T70] Workqueue: netns cleanup_net
[ 1073.491214][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.491597][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1073.492688][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1073.493054][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1073.493490][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1073.493918][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1073.494355][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800990a628
[ 1073.494778][   T70] R13: ffff88800990adf8 R14: ffffc9000050fc98 R15: ffff88800990abc0
[ 1073.495227][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1073.495701][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1073.496058][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1073.496495][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1073.496923][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1073.497360][   T70] Call Trace:
[ 1073.497560][   T70]  <TASK>
[ 1073.497768][ T70] ? __warn (kernel/panic.c:677) 
[ 1073.498017][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1073.498381][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.498728][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1073.499008][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1073.499288][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1073.499590][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1073.499868][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1073.500112][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1073.500436][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1073.500734][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1073.501057][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1073.501335][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.501632][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1073.501942][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1073.502249][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1073.502559][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1073.502868][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1073.503216][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1073.503512][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1073.503797][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1073.504204][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.504525][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1073.504838][ T70] kthread (kernel/kthread.c:388) 
[ 1073.505088][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.505467][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1073.505757][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1073.506036][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1095.103381][   T70] ------------[ cut here ]------------
| [ 1095.103746][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1095.104180][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1095.104761][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1095.106027][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1095.106723][   T70] Workqueue: netns cleanup_net
[ 1095.106992][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.107371][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1095.108527][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1095.108854][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1095.109303][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1095.109728][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1095.110148][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006802628
[ 1095.110584][   T70] R13: ffff888006802df8 R14: ffffc9000050fc98 R15: ffff888006802bc0
[ 1095.111010][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1095.111599][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1095.112025][   T70] CR2: 000055b141559fa8 CR3: 0000000020304004 CR4: 00000000001706f0
[ 1095.112562][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1095.113058][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1095.113598][   T70] Call Trace:
[ 1095.113803][   T70]  <TASK>
[ 1095.113983][ T70] ? __warn (kernel/panic.c:677) 
[ 1095.114259][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1095.114554][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.114897][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1095.115200][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1095.115480][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1095.115784][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1095.116103][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1095.116392][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.116716][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1095.117016][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1095.117360][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1095.117723][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.118013][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1095.118386][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.118706][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1095.119018][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1095.119352][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1095.119705][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1095.120021][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1095.120340][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1095.120777][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.121082][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.121371][ T70] kthread (kernel/kthread.c:388) 
[ 1095.121599][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.121851][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1095.122097][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.122358][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1095.289472][   T70] ------------[ cut here ]------------
| [ 1095.289820][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1095.290215][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1095.290749][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1095.291897][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1095.292650][   T70] Workqueue: netns cleanup_net
[ 1095.292964][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.293312][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1095.294505][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1095.294844][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1095.295285][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1095.295704][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1095.296126][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880086fa628
[ 1095.296585][   T70] R13: ffff8880086fadf8 R14: ffffc9000050fc98 R15: ffff8880086fabc0
[ 1095.297058][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1095.297614][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1095.298023][   T70] CR2: 00007fa306c82270 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1095.298451][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1095.298951][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1095.299453][   T70] Call Trace:
[ 1095.299669][   T70]  <TASK>
[ 1095.299852][ T70] ? __warn (kernel/panic.c:677) 
[ 1095.300087][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.300454][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1095.300754][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1095.301023][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1095.301329][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1095.301602][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1095.301844][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.302126][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1095.302389][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1095.302684][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1095.302930][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.303182][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1095.303459][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.303724][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1095.304060][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1095.304375][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1095.304734][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1095.305001][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1095.305349][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1095.305742][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.306039][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.306410][ T70] kthread (kernel/kthread.c:388) 
[ 1095.306649][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.306969][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1095.307244][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.307512][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1095.517770][   T70] ------------[ cut here ]------------
| [ 1095.518099][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1095.518505][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1095.518995][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1095.520317][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1095.521064][   T70] Workqueue: netns cleanup_net
[ 1095.521368][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.521779][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1095.522926][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1095.523329][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1095.523837][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1095.524360][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1095.524832][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88802034a628
[ 1095.525404][   T70] R13: ffff88802034adf8 R14: ffffc9000050fc98 R15: ffff88802034abc0
[ 1095.525835][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1095.526327][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1095.526688][   T70] CR2: 00007efd9f6dd000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1095.527114][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1095.527637][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1095.528064][   T70] Call Trace:
[ 1095.528259][   T70]  <TASK>
[ 1095.528425][ T70] ? __warn (kernel/panic.c:677) 
[ 1095.528710][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1095.529011][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.529365][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1095.529653][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1095.529957][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1095.530240][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1095.530583][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1095.530855][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.531200][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1095.531516][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1095.531842][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1095.532113][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.532464][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1095.532764][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.533056][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1095.533408][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1095.533695][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1095.534067][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1095.534362][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1095.534659][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1095.535104][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.535400][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.535723][ T70] kthread (kernel/kthread.c:388) 
[ 1095.535983][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.536289][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1095.536570][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.536870][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1095.713458][   T70] ------------[ cut here ]------------
| [ 1095.713774][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1095.714164][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1095.714671][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1095.715717][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1095.716500][   T70] Workqueue: netns cleanup_net
[ 1095.716796][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.717180][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1095.718367][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1095.718780][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1095.719285][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1095.719784][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1095.720297][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b262628
[ 1095.720813][   T70] R13: ffff88800b262df8 R14: ffffc9000050fc98 R15: ffff88800b262bc0
[ 1095.721329][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1095.721907][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1095.722339][   T70] CR2: 00007fe0827d1270 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1095.722830][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1095.723342][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1095.723808][   T70] Call Trace:
[ 1095.724009][   T70]  <TASK>
[ 1095.724181][ T70] ? __warn (kernel/panic.c:677) 
[ 1095.724443][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1095.724701][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.724986][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1095.725253][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1095.725513][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1095.725800][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1095.726125][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1095.726414][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1095.726759][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1095.727056][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1095.727449][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1095.727724][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.728052][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1095.728389][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1095.728706][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1095.729101][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1095.729414][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1095.729788][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1095.730092][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1095.730510][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1095.730938][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.731269][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1095.731586][ T70] kthread (kernel/kthread.c:388) 
[ 1095.731839][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.732115][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1095.732408][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1095.732691][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1117.075646][   T70] ------------[ cut here ]------------
| [ 1117.075958][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1117.076393][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1117.076920][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1117.078123][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1117.078824][   T70] Workqueue: netns cleanup_net
[ 1117.079119][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.079531][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1117.080758][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1117.081109][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1117.081588][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1117.082012][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1117.082454][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c142628
[ 1117.082882][   T70] R13: ffff88800c142df8 R14: ffffc9000050fc98 R15: ffff88800c142bc0
[ 1117.083312][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1117.083836][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1117.084245][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1117.084787][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1117.085272][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1117.085740][   T70] Call Trace:
[ 1117.085919][   T70]  <TASK>
[ 1117.086108][ T70] ? __warn (kernel/panic.c:677) 
[ 1117.086381][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1117.086683][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.086995][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1117.087279][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1117.087569][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1117.087856][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1117.088175][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1117.088515][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.088844][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1117.089154][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1117.089498][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1117.089775][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.090104][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1117.090425][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.090739][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1117.091084][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1117.091405][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1117.091705][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1117.091958][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1117.092214][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1117.092567][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.092841][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.093117][ T70] kthread (kernel/kthread.c:388) 
[ 1117.093351][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.093625][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1117.093867][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.094117][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1117.289143][   T70] ------------[ cut here ]------------
| [ 1117.289620][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1117.290164][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1117.290911][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1117.292602][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1117.293539][   T70] Workqueue: netns cleanup_net
[ 1117.293921][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.294400][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1117.295917][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1117.296390][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1117.297085][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1117.297748][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1117.298414][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880026d2628
[ 1117.299059][   T70] R13: ffff8880026d2df8 R14: ffffc9000050fc98 R15: ffff8880026d2bc0
[ 1117.299727][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1117.300471][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1117.301002][   T70] CR2: 00007ffee1d0dae0 CR3: 0000000020304001 CR4: 00000000001706f0
[ 1117.301700][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1117.302353][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1117.303016][   T70] Call Trace:
[ 1117.303308][   T70]  <TASK>
[ 1117.303559][ T70] ? __warn (kernel/panic.c:677) 
[ 1117.303908][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1117.304328][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.304756][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1117.305159][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1117.305562][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1117.305943][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1117.306380][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1117.306773][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.307210][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1117.307605][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1117.308053][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1117.308414][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.308783][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1117.309175][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.309553][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1117.309952][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1117.310356][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1117.310780][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1117.311138][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1117.311534][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1117.312128][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.312569][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.313002][ T70] kthread (kernel/kthread.c:388) 
[ 1117.313357][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.313760][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1117.314129][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.314541][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1117.496626][   T70] ------------[ cut here ]------------
| [ 1117.496977][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1117.497436][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1117.497936][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1117.498974][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1117.499717][   T70] Workqueue: netns cleanup_net
[ 1117.500008][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.500408][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1117.501461][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1117.501789][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1117.502233][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1117.502662][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1117.503085][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800d5ca628
[ 1117.503568][   T70] R13: ffff88800d5cadf8 R14: ffffc9000050fc98 R15: ffff88800d5cabc0
[ 1117.504022][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1117.504559][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1117.504940][   T70] CR2: 00007ffee1d0dae0 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1117.505442][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1117.505911][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1117.506411][   T70] Call Trace:
[ 1117.506604][   T70]  <TASK>
[ 1117.506772][ T70] ? __warn (kernel/panic.c:677) 
[ 1117.507048][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1117.507336][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.507670][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1117.507939][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1117.508185][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1117.508504][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1117.508801][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1117.509069][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.509394][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1117.509679][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1117.509987][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1117.510274][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.510544][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1117.510845][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.511131][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1117.511445][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1117.511758][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1117.512048][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1117.512310][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1117.512565][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1117.512924][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.513212][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.513489][ T70] kthread (kernel/kthread.c:388) 
[ 1117.513710][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.513956][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1117.514213][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.514491][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1117.712619][   T70] ------------[ cut here ]------------
| [ 1117.712934][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1117.713392][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1117.713968][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1117.715188][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1117.715939][   T70] Workqueue: netns cleanup_net
[ 1117.716266][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.716654][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1117.717846][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1117.718282][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1117.718822][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1117.719327][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1117.719816][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880099d2628
[ 1117.720310][   T70] R13: ffff8880099d2df8 R14: ffffc9000050fc98 R15: ffff8880099d2bc0
[ 1117.720807][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1117.721366][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1117.721738][   T70] CR2: 00007fd4930c230d CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1117.722265][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1117.722735][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1117.723198][   T70] Call Trace:
[ 1117.723397][   T70]  <TASK>
[ 1117.723558][ T70] ? __warn (kernel/panic.c:677) 
[ 1117.723802][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1117.724091][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.724403][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1117.724675][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1117.724914][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1117.725237][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1117.725528][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1117.725785][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1117.726093][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1117.726351][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1117.726636][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1117.726966][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.727272][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1117.727599][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1117.727888][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1117.728241][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1117.728547][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1117.728861][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1117.729213][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1117.729490][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1117.729870][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.730199][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1117.730512][ T70] kthread (kernel/kthread.c:388) 
[ 1117.730760][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.731043][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1117.731315][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1117.731584][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1138.957246][   T70] ------------[ cut here ]------------
| [ 1138.957561][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1138.957965][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1138.958497][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1138.959540][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1138.960331][   T70] Workqueue: netns cleanup_net
[ 1138.960596][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1138.960954][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1138.962019][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1138.962391][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1138.962837][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1138.963328][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1138.963795][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006aa2628
[ 1138.964239][   T70] R13: ffff888006aa2df8 R14: ffffc9000050fc98 R15: ffff888006aa2bc0
[ 1138.964722][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1138.965266][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1138.965647][   T70] CR2: 00007fb5b76d1000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1138.966090][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1138.966522][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1138.966949][   T70] Call Trace:
[ 1138.967129][   T70]  <TASK>
[ 1138.967294][ T70] ? __warn (kernel/panic.c:677) 
[ 1138.967572][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1138.967863][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1138.968168][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1138.968465][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1138.968706][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1138.968976][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1138.969298][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1138.969546][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1138.969871][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1138.970147][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1138.970456][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1138.970717][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1138.971004][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1138.971320][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1138.971594][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1138.971894][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1138.972274][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1138.972570][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1138.972850][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1138.973115][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1138.973508][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1138.973806][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1138.974090][ T70] kthread (kernel/kthread.c:388) 
[ 1138.974352][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1138.974619][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1138.974941][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1138.975299][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1139.135389][   T70] ------------[ cut here ]------------
| [ 1139.135726][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1139.136111][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1139.136618][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1139.137652][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1139.138360][   T70] Workqueue: netns cleanup_net
[ 1139.138658][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.139007][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1139.140106][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1139.140484][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1139.140938][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1139.141441][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1139.141909][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880205fa628
[ 1139.142375][   T70] R13: ffff8880205fadf8 R14: ffffc9000050fc98 R15: ffff8880205fabc0
[ 1139.142854][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1139.143387][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1139.143784][   T70] CR2: 00007f3cc53eb270 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1139.144271][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1139.144711][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1139.145145][   T70] Call Trace:
[ 1139.145337][   T70]  <TASK>
[ 1139.145496][ T70] ? __warn (kernel/panic.c:677) 
[ 1139.145718][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1139.145978][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.146262][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1139.146510][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1139.146796][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1139.147077][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1139.147370][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1139.147641][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.147949][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1139.148225][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1139.148533][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1139.148819][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.149082][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1139.149403][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.149677][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1139.149988][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1139.150306][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1139.150615][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1139.150906][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1139.151186][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1139.151597][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.151883][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.152185][ T70] kthread (kernel/kthread.c:388) 
[ 1139.152443][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.152726][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1139.152993][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.153277][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1139.310259][   T70] ------------[ cut here ]------------
| [ 1139.310623][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1139.311030][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1139.311606][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1139.312781][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1139.313518][   T70] Workqueue: netns cleanup_net
[ 1139.313802][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.314128][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1139.315186][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1139.315520][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1139.315950][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1139.316402][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1139.316878][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b182628
[ 1139.317350][   T70] R13: ffff88800b182df8 R14: ffffc9000050fc98 R15: ffff88800b182bc0
[ 1139.317806][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1139.318359][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1139.318738][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304001 CR4: 00000000001706f0
[ 1139.319227][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1139.319697][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1139.320169][   T70] Call Trace:
[ 1139.320380][   T70]  <TASK>
[ 1139.320568][ T70] ? __warn (kernel/panic.c:677) 
[ 1139.320802][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1139.321115][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.321427][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1139.321705][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1139.321971][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1139.322282][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1139.322623][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1139.322890][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.323175][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1139.323445][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1139.323739][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1139.323984][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.324251][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1139.324518][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.324781][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1139.325116][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1139.325425][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1139.325758][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1139.326055][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1139.326351][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1139.326763][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.327098][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.327409][ T70] kthread (kernel/kthread.c:388) 
[ 1139.327682][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.327943][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1139.328236][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.328504][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1139.497158][   T70] ------------[ cut here ]------------
| [ 1139.497623][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1139.498269][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1139.499062][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1139.500708][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1139.501435][   T70] Workqueue: netns cleanup_net
[ 1139.501711][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.502070][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1139.503163][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1139.503530][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1139.503984][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1139.504450][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1139.504948][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008112628
[ 1139.505413][   T70] R13: ffff888008112df8 R14: ffffc9000050fc98 R15: ffff888008112bc0
[ 1139.505868][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1139.506396][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1139.506799][   T70] CR2: 00007fc2aeabc2a8 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1139.507275][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1139.507730][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1139.508183][   T70] Call Trace:
[ 1139.508413][   T70]  <TASK>
[ 1139.508587][ T70] ? __warn (kernel/panic.c:677) 
[ 1139.508833][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1139.509093][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.509396][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1139.509660][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1139.509894][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1139.510142][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1139.510420][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1139.510666][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1139.510949][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1139.511209][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1139.511535][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1139.511826][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.512121][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1139.512432][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1139.512727][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1139.513046][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1139.513366][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1139.513700][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1139.513977][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1139.514271][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1139.514715][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.515050][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1139.515369][ T70] kthread (kernel/kthread.c:388) 
[ 1139.515629][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.515920][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1139.516212][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1139.516483][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1161.134563][   T70] ------------[ cut here ]------------
| [ 1161.134952][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1161.135409][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1161.135987][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1161.137281][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1161.138020][   T70] Workqueue: netns cleanup_net
[ 1161.138309][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.138626][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1161.139787][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1161.140174][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1161.140674][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1161.141201][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1161.141705][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800aed2628
[ 1161.142178][   T70] R13: ffff88800aed2df8 R14: ffffc9000050fc98 R15: ffff88800aed2bc0
[ 1161.142627][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1161.143122][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1161.143492][   T70] CR2: 00007f111c5f1000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1161.143916][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1161.144385][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1161.144968][   T70] Call Trace:
[ 1161.145185][   T70]  <TASK>
[ 1161.145391][ T70] ? __warn (kernel/panic.c:677) 
[ 1161.145633][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1161.145908][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.146248][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1161.146512][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1161.146776][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1161.147061][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1161.147374][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1161.147641][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.147972][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1161.148239][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1161.148576][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1161.148835][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.149147][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1161.149474][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.149771][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1161.150107][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1161.150407][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1161.150745][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1161.151067][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1161.151380][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1161.151789][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.152090][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.152426][ T70] kthread (kernel/kthread.c:388) 
[ 1161.152668][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.152967][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1161.153216][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.153462][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1161.322625][   T70] ------------[ cut here ]------------
| [ 1161.322957][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1161.323440][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1161.323942][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1161.325180][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1161.325848][   T70] Workqueue: netns cleanup_net
[ 1161.326122][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.326505][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1161.327588][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1161.327931][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1161.328402][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1161.328826][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1161.329259][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b292628
[ 1161.329724][   T70] R13: ffff88800b292df8 R14: ffffc9000050fc98 R15: ffff88800b292bc0
[ 1161.330234][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1161.330756][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1161.331154][   T70] CR2: 00007f0eb2589000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1161.331624][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1161.332081][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1161.332556][   T70] Call Trace:
[ 1161.332745][   T70]  <TASK>
[ 1161.332940][ T70] ? __warn (kernel/panic.c:677) 
[ 1161.333201][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1161.333505][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.333854][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1161.334162][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1161.334458][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1161.334771][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1161.335132][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1161.335438][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.335766][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1161.336077][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1161.336438][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1161.336728][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.337017][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1161.337338][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.337645][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1161.337960][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1161.338266][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1161.338598][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1161.338897][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1161.339200][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1161.339585][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.339930][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.340258][ T70] kthread (kernel/kthread.c:388) 
[ 1161.340525][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.340799][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1161.341090][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.341426][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1161.515677][   T70] ------------[ cut here ]------------
| [ 1161.516067][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1161.516496][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1161.517055][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1161.518163][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1161.518847][   T70] Workqueue: netns cleanup_net
[ 1161.519122][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.519448][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1161.520565][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1161.520968][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1161.521434][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1161.521895][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1161.522388][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880095b2628
[ 1161.522822][   T70] R13: ffff8880095b2df8 R14: ffffc9000050fc98 R15: ffff8880095b2bc0
[ 1161.523306][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1161.523829][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1161.524238][   T70] CR2: 00007f127e029270 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1161.524694][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1161.525177][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1161.525664][   T70] Call Trace:
[ 1161.525887][   T70]  <TASK>
[ 1161.526056][ T70] ? __warn (kernel/panic.c:677) 
[ 1161.526296][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1161.526557][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.526840][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1161.527095][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1161.527348][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1161.527605][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1161.527880][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1161.528128][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.528472][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1161.528772][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1161.529119][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1161.529414][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.529697][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1161.530024][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.530334][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1161.530673][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1161.530971][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1161.531332][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1161.531626][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1161.531915][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1161.532312][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.532646][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.532985][ T70] kthread (kernel/kthread.c:388) 
[ 1161.533254][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.533545][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1161.533832][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.534124][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1161.736428][   T70] ------------[ cut here ]------------
| [ 1161.736790][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1161.737254][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1161.737808][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1161.738999][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1161.739701][   T70] Workqueue: netns cleanup_net
[ 1161.740036][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.740401][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1161.741500][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1161.741850][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1161.742292][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1161.742815][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1161.743293][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008542628
[ 1161.743805][   T70] R13: ffff888008542df8 R14: ffffc9000050fc98 R15: ffff888008542bc0
[ 1161.744301][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1161.744872][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1161.745298][   T70] CR2: 00007ff2eca91270 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1161.745778][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1161.746279][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1161.746798][   T70] Call Trace:
[ 1161.746990][   T70]  <TASK>
[ 1161.747184][ T70] ? __warn (kernel/panic.c:677) 
[ 1161.747456][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1161.747753][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.748110][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1161.748391][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1161.748668][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1161.748952][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1161.749279][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1161.749593][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1161.749900][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1161.750181][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1161.750538][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1161.750790][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.751068][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1161.751342][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1161.751600][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1161.751878][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1161.752147][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1161.752445][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1161.752697][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1161.752946][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1161.753309][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.753697][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1161.753995][ T70] kthread (kernel/kthread.c:388) 
[ 1161.754264][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.754590][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1161.754874][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1161.755120][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1180.997408][   T70] ------------[ cut here ]------------
| [ 1180.997720][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1180.998097][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1180.998603][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1180.999731][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1181.000473][   T70] Workqueue: netns cleanup_net
[ 1181.000737][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.001053][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1181.002087][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1181.002425][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1181.002861][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1181.003327][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1181.003787][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008502628
[ 1181.004260][   T70] R13: ffff888008502df8 R14: ffffc9000050fc98 R15: ffff888008502bc0
[ 1181.004769][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1181.005470][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1181.005871][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1181.006384][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1181.006851][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1181.007304][   T70] Call Trace:
[ 1181.007495][   T70]  <TASK>
[ 1181.007702][ T70] ? __warn (kernel/panic.c:677) 
[ 1181.007965][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1181.008263][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.008574][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1181.008848][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1181.009117][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1181.009420][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1181.009722][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1181.010003][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.010324][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1181.010609][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1181.010921][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1181.011204][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.011492][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1181.011811][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.012089][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1181.012406][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1181.012743][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1181.013066][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1181.013351][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1181.013647][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1181.014056][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.014378][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.014693][ T70] kthread (kernel/kthread.c:388) 
[ 1181.014954][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.015249][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1181.015519][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.015804][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1181.183952][   T70] ------------[ cut here ]------------
| [ 1181.184322][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1181.184770][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1181.185309][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1181.186428][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1181.187141][   T70] Workqueue: netns cleanup_net
[ 1181.187462][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.187792][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1181.188941][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1181.189341][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1181.189843][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1181.190443][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1181.191034][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b29a628
[ 1181.191642][   T70] R13: ffff88800b29adf8 R14: ffffc9000050fc98 R15: ffff88800b29abc0
[ 1181.192268][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1181.192800][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1181.193202][   T70] CR2: 00007f799906c000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1181.193661][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1181.194121][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1181.194592][   T70] Call Trace:
[ 1181.194805][   T70]  <TASK>
[ 1181.194972][ T70] ? __warn (kernel/panic.c:677) 
[ 1181.195209][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1181.195497][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.195822][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1181.196077][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1181.196328][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1181.196578][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1181.196848][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1181.197086][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.197381][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1181.197633][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1181.197918][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1181.198158][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.198485][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1181.198797][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.199059][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1181.199398][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1181.199691][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1181.200002][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1181.200284][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1181.200549][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1181.200951][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.201255][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.201584][ T70] kthread (kernel/kthread.c:388) 
[ 1181.201829][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.202094][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1181.202381][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.202647][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1181.381469][   T70] ------------[ cut here ]------------
| [ 1181.381807][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1181.382225][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1181.382712][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1181.383732][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1181.384419][   T70] Workqueue: netns cleanup_net
[ 1181.384698][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.385013][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1181.386079][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1181.386462][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1181.387017][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1181.387486][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1181.388064][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006be2628
[ 1181.388596][   T70] R13: ffff888006be2df8 R14: ffffc9000050fc98 R15: ffff888006be2bc0
[ 1181.389186][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1181.389882][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1181.390394][   T70] CR2: 000055b140770dec CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1181.391026][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1181.391635][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1181.392259][   T70] Call Trace:
[ 1181.392526][   T70]  <TASK>
[ 1181.392719][ T70] ? __warn (kernel/panic.c:677) 
[ 1181.393078][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.393401][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1181.393670][ T70] ? restore_regs_and_return_to_kernel (arch/x86/entry/entry_64.S:658) 
[ 1181.394068][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1181.394384][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1181.394650][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1181.394938][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1181.395200][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.395484][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1181.395737][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1181.396040][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1181.396288][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.396546][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1181.396818][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.397106][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1181.397423][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1181.397719][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1181.398051][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1181.398333][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1181.398609][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1181.399028][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.399344][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.399642][ T70] kthread (kernel/kthread.c:388) 
[ 1181.399890][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.400200][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1181.400484][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.400770][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1181.569352][   T70] ------------[ cut here ]------------
| [ 1181.569668][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1181.570045][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1181.570547][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1181.571681][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1181.572392][   T70] Workqueue: netns cleanup_net
[ 1181.572656][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.572983][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1181.574138][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1181.574491][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1181.574986][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1181.575417][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1181.575840][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008342628
[ 1181.576269][   T70] R13: ffff888008342df8 R14: ffffc9000050fc98 R15: ffff888008342bc0
[ 1181.576697][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1181.577176][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1181.577545][   T70] CR2: 00007f38b92cf270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1181.578023][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1181.578498][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1181.578983][   T70] Call Trace:
[ 1181.579167][   T70]  <TASK>
[ 1181.579359][ T70] ? __warn (kernel/panic.c:677) 
[ 1181.579618][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1181.579905][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.580225][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1181.580502][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1181.580759][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1181.581034][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1181.581364][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1181.581624][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1181.581931][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1181.582253][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1181.582580][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1181.582854][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.583133][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1181.583439][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1181.583723][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1181.584037][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1181.584357][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1181.584706][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1181.584960][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1181.585261][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1181.585648][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.585969][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1181.586274][ T70] kthread (kernel/kthread.c:388) 
[ 1181.586495][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.586748][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1181.586989][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1181.587248][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1201.010171][   T70] ------------[ cut here ]------------
| [ 1201.010512][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1201.010890][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1201.011475][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1201.012652][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1201.013424][   T70] Workqueue: netns cleanup_net
[ 1201.013726][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.014074][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1201.015288][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1201.015654][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1201.016136][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1201.016663][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1201.017153][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a232628
[ 1201.017582][   T70] R13: ffff88800a232df8 R14: ffffc9000050fc98 R15: ffff88800a232bc0
[ 1201.018006][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1201.018489][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1201.018844][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304004 CR4: 00000000001706f0
[ 1201.019282][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1201.019705][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1201.020200][   T70] Call Trace:
[ 1201.020430][   T70]  <TASK>
[ 1201.020606][ T70] ? __warn (kernel/panic.c:677) 
[ 1201.020855][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1201.021177][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.021472][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1201.021782][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1201.022047][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1201.022346][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1201.022658][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1201.022941][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.023261][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1201.023561][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1201.023873][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1201.024175][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.024478][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1201.024802][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.025078][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1201.025428][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1201.025700][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1201.026020][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1201.026317][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1201.026572][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1201.026828][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1201.027179][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.027464][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.027785][ T70] kthread (kernel/kthread.c:388) 
[ 1201.028032][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.028331][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1201.028572][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.028822][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1201.184368][   T70] ------------[ cut here ]------------
| [ 1201.184699][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1201.185113][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1201.185704][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1201.186907][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1201.187652][   T70] Workqueue: netns cleanup_net
[ 1201.187933][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.188257][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1201.189425][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1201.189790][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1201.190287][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1201.190773][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1201.191241][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800613a628
[ 1201.191754][   T70] R13: ffff88800613adf8 R14: ffffc9000050fc98 R15: ffff88800613abc0
[ 1201.192230][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1201.192707][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1201.193061][   T70] CR2: 00007ffee1d0d948 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1201.193521][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1201.193950][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1201.194411][   T70] Call Trace:
[ 1201.194611][   T70]  <TASK>
[ 1201.194776][ T70] ? __warn (kernel/panic.c:677) 
[ 1201.195093][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1201.195405][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.195715][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1201.196017][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1201.196271][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1201.196555][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1201.196879][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1201.197136][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.197436][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1201.197688][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1201.197974][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1201.198219][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.198474][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1201.198743][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.198996][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1201.199337][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1201.199667][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1201.200019][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1201.200363][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1201.200641][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1201.200929][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1201.201322][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.201637][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.201937][ T70] kthread (kernel/kthread.c:388) 
[ 1201.202208][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.202491][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1201.202743][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.203054][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1201.367474][   T70] ------------[ cut here ]------------
| [ 1201.367812][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1201.368186][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1201.368693][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1201.369726][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1201.370382][   T70] Workqueue: netns cleanup_net
[ 1201.370646][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.370958][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1201.371998][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1201.372367][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1201.372852][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1201.373321][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1201.373792][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888002bd2628
[ 1201.374231][   T70] R13: ffff888002bd2df8 R14: ffffc9000050fc98 R15: ffff888002bd2bc0
[ 1201.374707][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1201.375242][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1201.375609][   T70] CR2: 00007fe21374c000 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1201.376102][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1201.376558][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1201.377006][   T70] Call Trace:
[ 1201.377211][   T70]  <TASK>
[ 1201.377412][ T70] ? __warn (kernel/panic.c:677) 
[ 1201.377666][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1201.377949][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.378290][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1201.378568][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1201.378819][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1201.379135][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1201.379441][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1201.379722][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.380041][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1201.380335][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1201.380647][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1201.380938][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.381215][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1201.381484][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.381732][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1201.382009][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1201.382289][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1201.382610][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1201.382902][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1201.383153][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1201.383410][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1201.383827][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.384128][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.384443][ T70] kthread (kernel/kthread.c:388) 
[ 1201.384711][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.384991][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1201.385273][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.385553][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1201.562269][   T70] ------------[ cut here ]------------
| [ 1201.562583][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1201.562955][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1201.563843][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1201.565019][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1201.565778][   T70] Workqueue: netns cleanup_net
[ 1201.566079][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.566429][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1201.567693][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1201.568056][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1201.568520][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1201.568943][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1201.569370][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a2ea628
[ 1201.569814][   T70] R13: ffff88800a2eadf8 R14: ffffc9000050fc98 R15: ffff88800a2eabc0
[ 1201.570284][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1201.570835][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1201.571244][   T70] CR2: 00007fb3950b6270 CR3: 000000000dc90003 CR4: 00000000001706f0
[ 1201.571710][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1201.572215][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1201.572691][   T70] Call Trace:
[ 1201.572924][   T70]  <TASK>
[ 1201.573104][ T70] ? __warn (kernel/panic.c:677) 
[ 1201.573344][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1201.573651][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.573991][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1201.574256][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1201.574540][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1201.574866][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1201.575175][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1201.575483][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1201.575806][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1201.576101][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1201.576416][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1201.576685][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.576999][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1201.577309][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1201.577608][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1201.577949][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1201.578266][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1201.578639][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1201.578996][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1201.579277][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1201.579531][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1201.579890][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.580164][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1201.580446][ T70] kthread (kernel/kthread.c:388) 
[ 1201.580667][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.580924][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1201.581161][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1201.581418][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1220.693447][   T70] ------------[ cut here ]------------
| [ 1220.693786][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1220.694204][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1220.694826][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1220.696031][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1220.696732][   T70] Workqueue: netns cleanup_net
[ 1220.697000][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.697403][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1220.698512][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1220.698855][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1220.699323][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1220.699777][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1220.700234][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b40a628
[ 1220.700689][   T70] R13: ffff88800b40adf8 R14: ffffc9000050fc98 R15: ffff88800b40abc0
[ 1220.701141][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1220.701654][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1220.702033][   T70] CR2: 00007f0942550a30 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1220.702502][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1220.703059][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1220.703584][   T70] Call Trace:
[ 1220.703779][   T70]  <TASK>
[ 1220.703951][ T70] ? __warn (kernel/panic.c:677) 
[ 1220.704236][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.704618][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1220.704897][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1220.705159][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1220.705457][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1220.705789][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1220.706050][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.706372][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1220.706667][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1220.706957][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1220.707252][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1220.707519][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1220.707808][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1220.708096][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1220.708397][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1220.708704][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1220.709053][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1220.709417][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1220.709686][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1220.709958][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1220.710367][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1220.710672][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1220.710979][ T70] kthread (kernel/kthread.c:388) 
[ 1220.711216][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1220.711464][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1220.711712][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1220.711962][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1220.895350][   T70] ------------[ cut here ]------------
| [ 1220.895668][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1220.896043][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1220.896590][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1220.897718][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1220.898464][   T70] Workqueue: netns cleanup_net
[ 1220.898769][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.899126][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1220.900172][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1220.900590][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1220.901056][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1220.901595][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1220.902078][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b93a628
[ 1220.902543][   T70] R13: ffff88800b93adf8 R14: ffffc9000050fc98 R15: ffff88800b93abc0
[ 1220.903038][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1220.903572][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1220.903955][   T70] CR2: 00007efd2ee13270 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1220.904454][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1220.904913][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1220.905392][   T70] Call Trace:
[ 1220.905579][   T70]  <TASK>
[ 1220.905740][ T70] ? __warn (kernel/panic.c:677) 
[ 1220.905962][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1220.906232][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.906517][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1220.906769][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1220.907008][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1220.907274][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1220.907562][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1220.907843][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1220.908156][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1220.908442][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1220.908770][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1220.909023][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1220.909335][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1220.909626][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1220.909898][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1220.910230][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1220.910517][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1220.910880][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1220.911223][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1220.911529][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1220.911802][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1220.912187][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1220.912497][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1220.912808][ T70] kthread (kernel/kthread.c:388) 
[ 1220.913053][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1220.913341][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1220.913623][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1220.913893][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1221.073328][   T70] ------------[ cut here ]------------
| [ 1221.073683][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1221.074109][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1221.074664][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1221.075813][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1221.076535][   T70] Workqueue: netns cleanup_net
[ 1221.076825][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.077142][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1221.078317][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1221.078685][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1221.079145][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1221.079590][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1221.080019][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880062f2628
[ 1221.080567][   T70] R13: ffff8880062f2df8 R14: ffffc9000050fc98 R15: ffff8880062f2bc0
[ 1221.081106][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1221.081679][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1221.082091][   T70] CR2: 00007efd2ee13270 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1221.082588][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1221.083055][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1221.083545][   T70] Call Trace:
[ 1221.083743][   T70]  <TASK>
[ 1221.083923][ T70] ? __warn (kernel/panic.c:677) 
[ 1221.084182][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1221.084500][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.084827][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1221.085117][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1221.085402][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1221.085682][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1221.085985][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1221.086261][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.086572][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1221.086860][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1221.087175][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1221.087446][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1221.087731][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1221.088031][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1221.088313][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1221.088641][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1221.088948][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1221.089345][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1221.089693][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1221.090051][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1221.090330][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1221.090692][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1221.090968][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1221.091248][ T70] kthread (kernel/kthread.c:388) 
[ 1221.091475][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1221.091725][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1221.091964][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1221.092213][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1221.263959][   T70] ------------[ cut here ]------------
| [ 1221.264285][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1221.264694][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1221.265266][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1221.266377][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1221.267096][   T70] Workqueue: netns cleanup_net
[ 1221.267380][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.267693][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1221.268745][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1221.269075][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1221.269504][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1221.269929][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1221.270394][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b20a628
[ 1221.270863][   T70] R13: ffff88800b20adf8 R14: ffffc9000050fc98 R15: ffff88800b20abc0
[ 1221.271320][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1221.271837][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1221.272207][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304005 CR4: 00000000001706f0
[ 1221.272636][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1221.273058][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1221.273484][   T70] Call Trace:
[ 1221.273665][   T70]  <TASK>
[ 1221.273833][ T70] ? __warn (kernel/panic.c:677) 
[ 1221.274080][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1221.274385][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.274687][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1221.274977][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1221.275236][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1221.275527][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1221.275831][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1221.276106][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1221.276440][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1221.276710][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1221.277030][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1221.277320][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1221.277582][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1221.277885][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1221.278155][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1221.278459][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1221.278774][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1221.279115][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1221.279447][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1221.279699][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1221.280002][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1221.280404][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1221.280711][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1221.281014][ T70] kthread (kernel/kthread.c:388) 
[ 1221.281255][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1221.281579][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1221.281843][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1221.282098][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1240.777483][   T70] ------------[ cut here ]------------
| [ 1240.777859][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1240.778285][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1240.778850][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1240.780062][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1240.780845][   T70] Workqueue: netns cleanup_net
[ 1240.781113][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.781450][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1240.782520][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1240.782862][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1240.783313][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1240.783835][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1240.784324][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880059b2628
[ 1240.784833][   T70] R13: ffff8880059b2df8 R14: ffffc9000050fc98 R15: ffff8880059b2bc0
[ 1240.785310][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1240.785868][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1240.786319][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304002 CR4: 00000000001706f0
[ 1240.786787][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1240.787246][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1240.787671][   T70] Call Trace:
[ 1240.787864][   T70]  <TASK>
[ 1240.788024][ T70] ? __warn (kernel/panic.c:677) 
[ 1240.788259][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1240.788518][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.788802][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1240.789095][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1240.789368][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1240.789637][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1240.790004][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1240.790300][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.790625][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1240.790911][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1240.791240][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1240.791535][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1240.791865][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1240.792172][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1240.792460][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1240.792796][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1240.793108][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1240.793517][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1240.793833][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1240.794150][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1240.794463][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1240.794893][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1240.795221][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1240.795552][ T70] kthread (kernel/kthread.c:388) 
[ 1240.795820][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1240.796104][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1240.796403][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1240.796699][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1240.971076][   T70] ------------[ cut here ]------------
| [ 1240.971547][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1240.972107][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1240.972865][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1240.974548][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1240.975557][   T70] Workqueue: netns cleanup_net
[ 1240.975985][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.976506][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1240.978160][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1240.978709][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1240.979384][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1240.980072][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1240.980774][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800cf5a628
[ 1240.981447][   T70] R13: ffff88800cf5adf8 R14: ffffc9000050fc98 R15: ffff88800cf5abc0
[ 1240.982144][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1240.982893][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1240.983456][   T70] CR2: 00007f7e27eb9270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1240.984061][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1240.984689][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1240.985293][   T70] Call Trace:
[ 1240.985555][   T70]  <TASK>
[ 1240.985792][ T70] ? __warn (kernel/panic.c:677) 
[ 1240.986115][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1240.986483][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.986883][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1240.987254][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1240.987623][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1240.988027][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1240.988471][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1240.988852][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1240.989298][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1240.989695][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1240.990141][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1240.990560][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1240.990947][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1240.991403][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1240.991801][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1240.992259][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1240.992691][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1240.993215][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1240.993695][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1240.994084][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1240.994495][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1240.995046][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1240.995483][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1240.995932][ T70] kthread (kernel/kthread.c:388) 
[ 1240.996297][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1240.996687][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1240.997098][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1240.997499][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1241.171500][   T70] ------------[ cut here ]------------
| [ 1241.171871][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1241.172306][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1241.172828][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1241.173907][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1241.174579][   T70] Workqueue: netns cleanup_net
[ 1241.174845][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.175158][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1241.176214][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1241.176584][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1241.177060][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1241.177534][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1241.178002][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800267a628
[ 1241.178478][   T70] R13: ffff88800267adf8 R14: ffffc9000050fc98 R15: ffff88800267abc0
[ 1241.178956][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1241.179472][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1241.179878][   T70] CR2: 00007f7e27eb9270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1241.180354][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1241.180833][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1241.181309][   T70] Call Trace:
[ 1241.181500][   T70]  <TASK>
[ 1241.181685][ T70] ? __warn (kernel/panic.c:677) 
[ 1241.181938][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1241.182225][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.182560][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1241.182831][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1241.183101][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1241.183386][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1241.183686][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1241.183950][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.184287][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1241.184555][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1241.184844][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1241.185086][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1241.185346][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1241.185617][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1241.185868][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1241.186143][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1241.186431][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1241.186805][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1241.187122][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1241.187401][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1241.187694][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1241.188093][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1241.188404][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1241.188714][ T70] kthread (kernel/kthread.c:388) 
[ 1241.188955][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1241.189254][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1241.189508][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1241.189798][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1241.365616][   T70] ------------[ cut here ]------------
| [ 1241.365932][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1241.366383][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1241.366936][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1241.368074][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1241.368784][   T70] Workqueue: netns cleanup_net
[ 1241.369046][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.369405][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1241.370494][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1241.370873][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1241.371333][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1241.371795][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1241.372274][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800da2a628
[ 1241.372732][   T70] R13: ffff88800da2adf8 R14: ffffc9000050fc98 R15: ffff88800da2abc0
[ 1241.373207][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1241.373718][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1241.374107][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304002 CR4: 00000000001706f0
[ 1241.374595][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1241.375048][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1241.375523][   T70] Call Trace:
[ 1241.375755][   T70]  <TASK>
[ 1241.375927][ T70] ? __warn (kernel/panic.c:677) 
[ 1241.376209][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1241.376519][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.376856][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1241.377155][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1241.377434][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1241.377733][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1241.378059][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1241.378356][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1241.378665][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1241.378927][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1241.379233][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1241.379485][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1241.379751][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1241.380027][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1241.380292][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1241.380592][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1241.380864][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1241.381234][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1241.381567][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1241.381856][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1241.382141][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1241.382537][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1241.382873][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1241.383187][ T70] kthread (kernel/kthread.c:388) 
[ 1241.383455][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1241.383764][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1241.384062][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1241.384375][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1260.954277][   T70] ------------[ cut here ]------------
| [ 1260.954797][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1260.955442][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1260.956244][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1260.957719][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1260.958532][   T70] Workqueue: netns cleanup_net
[ 1260.958834][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1260.959221][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1260.960680][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1260.961148][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1260.961760][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1260.962375][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1260.963001][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800438a628
[ 1260.963703][   T70] R13: ffff88800438adf8 R14: ffffc9000050fc98 R15: ffff88800438abc0
[ 1260.964357][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1260.965098][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1260.965635][   T70] CR2: 00007f6e4f65c000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1260.966309][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1260.966946][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1260.967562][   T70] Call Trace:
[ 1260.967819][   T70]  <TASK>
[ 1260.968057][ T70] ? __warn (kernel/panic.c:677) 
[ 1260.968396][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1260.968770][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1260.969069][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1260.969336][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1260.969576][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1260.969833][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1260.970168][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1260.970449][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1260.970778][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1260.971070][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1260.971403][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1260.971678][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1260.971976][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1260.972296][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1260.972616][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1260.972933][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1260.973263][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1260.973648][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1260.973968][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1260.974310][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1260.974578][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1260.975010][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1260.975318][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1260.975641][ T70] kthread (kernel/kthread.c:388) 
[ 1260.975913][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1260.976182][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1260.976466][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1260.976764][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1261.176127][   T70] ------------[ cut here ]------------
| [ 1261.176604][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1261.177154][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1261.177881][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1261.179393][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1261.180368][   T70] Workqueue: netns cleanup_net
[ 1261.180818][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.181316][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1261.182951][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1261.183452][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1261.184124][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1261.184795][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1261.185473][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800833a628
[ 1261.186118][   T70] R13: ffff88800833adf8 R14: ffffc9000050fc98 R15: ffff88800833abc0
[ 1261.186824][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1261.187557][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1261.188115][   T70] CR2: 00007ffee1d0d948 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1261.188661][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1261.189125][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1261.189592][   T70] Call Trace:
[ 1261.189769][   T70]  <TASK>
[ 1261.189957][ T70] ? __warn (kernel/panic.c:677) 
[ 1261.190233][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1261.190514][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.190812][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1261.191097][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1261.191343][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1261.191622][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1261.191923][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1261.192172][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.192502][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1261.192784][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1261.193095][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1261.193359][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.193643][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1261.193945][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.194234][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1261.194533][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1261.194830][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1261.195171][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1261.195496][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1261.195766][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1261.196018][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1261.196395][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.196671][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.196948][ T70] kthread (kernel/kthread.c:388) 
[ 1261.197167][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.197431][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1261.197674][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.197925][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1261.377369][   T70] ------------[ cut here ]------------
| [ 1261.377696][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1261.378081][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1261.378589][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1261.379666][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1261.380397][   T70] Workqueue: netns cleanup_net
[ 1261.380672][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.380986][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1261.382030][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1261.382368][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1261.382790][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1261.383229][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1261.383716][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800825a628
[ 1261.384183][   T70] R13: ffff88800825adf8 R14: ffffc9000050fc98 R15: ffff88800825abc0
[ 1261.384733][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1261.385278][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1261.385680][   T70] CR2: 00007f04fa311270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1261.386161][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1261.386653][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1261.387105][   T70] Call Trace:
[ 1261.387308][   T70]  <TASK>
[ 1261.387507][ T70] ? __warn (kernel/panic.c:677) 
[ 1261.387767][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1261.388053][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.388386][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1261.388644][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1261.388921][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1261.389221][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1261.389521][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1261.389796][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.390081][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1261.390352][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1261.390643][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1261.390903][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.391157][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1261.391435][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.391693][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1261.391974][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1261.392269][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1261.392623][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1261.392963][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1261.393225][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1261.393519][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1261.393898][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.394199][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.394513][ T70] kthread (kernel/kthread.c:388) 
[ 1261.394742][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.395045][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1261.395317][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.395596][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1261.590788][   T70] ------------[ cut here ]------------
| [ 1261.591247][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1261.591822][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1261.592546][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1261.593941][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1261.594942][   T70] Workqueue: netns cleanup_net
[ 1261.595334][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.595809][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1261.597391][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1261.597851][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1261.598506][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1261.598999][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1261.599465][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bbaa628
[ 1261.599965][   T70] R13: ffff88800bbaadf8 R14: ffffc9000050fc98 R15: ffff88800bbaabc0
[ 1261.600424][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1261.600906][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1261.601358][   T70] CR2: 00007f6a9e4762a8 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1261.601916][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1261.602551][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1261.603178][   T70] Call Trace:
[ 1261.603388][   T70]  <TASK>
[ 1261.603653][ T70] ? __warn (kernel/panic.c:677) 
[ 1261.603951][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1261.604397][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.604798][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1261.605203][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1261.605550][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1261.605945][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1261.606354][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1261.606755][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1261.607171][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1261.607535][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1261.607981][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1261.608326][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.608665][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1261.609027][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1261.609370][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1261.609738][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1261.610096][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1261.610559][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1261.610986][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1261.611264][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1261.611522][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1261.611918][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.612203][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1261.612477][ T70] kthread (kernel/kthread.c:388) 
[ 1261.612703][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.613015][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1261.613339][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1261.613628][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1281.710708][   T70] ------------[ cut here ]------------
| [ 1281.711068][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1281.711555][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1281.712137][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1281.713216][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1281.713886][   T70] Workqueue: netns cleanup_net
[ 1281.714150][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.714499][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1281.715751][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1281.716118][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1281.716561][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1281.717032][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1281.717510][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800613a628
[ 1281.717967][   T70] R13: ffff88800613adf8 R14: ffffc9000050fc98 R15: ffff88800613abc0
[ 1281.718476][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1281.718968][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1281.719335][   T70] CR2: 00007fbd9cdf6000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1281.719767][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1281.720204][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1281.720642][   T70] Call Trace:
[ 1281.720821][   T70]  <TASK>
[ 1281.720993][ T70] ? __warn (kernel/panic.c:677) 
[ 1281.721253][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1281.721572][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.721929][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1281.722213][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1281.722506][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1281.722820][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1281.723152][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1281.723457][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.723795][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1281.724087][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1281.724608][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1281.724873][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1281.725221][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1281.725538][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1281.725843][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1281.726185][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1281.726510][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1281.726897][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1281.727309][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1281.727614][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1281.727895][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1281.728344][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1281.728679][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1281.728976][ T70] kthread (kernel/kthread.c:388) 
[ 1281.729224][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1281.729506][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1281.729792][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1281.730095][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1281.911378][   T70] ------------[ cut here ]------------
| [ 1281.911730][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1281.912167][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1281.912705][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1281.913731][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1281.914412][   T70] Workqueue: netns cleanup_net
[ 1281.914681][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.914997][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1281.916039][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1281.916375][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1281.916803][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1281.917243][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1281.917708][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ae52628
[ 1281.918213][   T70] R13: ffff88800ae52df8 R14: ffffc9000050fc98 R15: ffff88800ae52bc0
[ 1281.918689][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1281.919185][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1281.919581][   T70] CR2: 000055b14071e5a0 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1281.920032][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1281.920502][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1281.921017][   T70] Call Trace:
[ 1281.921242][   T70]  <TASK>
[ 1281.921425][ T70] ? __warn (kernel/panic.c:677) 
[ 1281.921651][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1281.921923][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.922220][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1281.922484][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1281.922730][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1281.923006][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1281.923308][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1281.923565][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1281.923859][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1281.924127][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1281.924462][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1281.924747][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1281.925067][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1281.925371][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1281.925684][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1281.926017][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1281.926329][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1281.926732][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1281.927078][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1281.927376][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1281.927663][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1281.928075][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1281.928406][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1281.928720][ T70] kthread (kernel/kthread.c:388) 
[ 1281.928975][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1281.929252][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1281.929508][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1281.929826][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1282.154433][   T70] ------------[ cut here ]------------
| [ 1282.154759][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1282.155138][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1282.155642][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1282.156824][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1282.157618][   T70] Workqueue: netns cleanup_net
[ 1282.158039][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.158526][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1282.160016][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1282.160510][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1282.161123][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1282.161746][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1282.162506][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800d0aa628
[ 1282.163230][   T70] R13: ffff88800d0aadf8 R14: ffffc9000050fc98 R15: ffff88800d0aabc0
[ 1282.163918][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1282.164733][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1282.165319][   T70] CR2: 00007fcc80468000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1282.166004][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1282.166701][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1282.167387][   T70] Call Trace:
[ 1282.167668][   T70]  <TASK>
[ 1282.167924][ T70] ? __warn (kernel/panic.c:677) 
[ 1282.168287][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1282.168705][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.169146][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1282.169546][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1282.169911][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1282.170330][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1282.170738][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1282.171093][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.171518][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1282.171890][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1282.172320][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1282.172671][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1282.173063][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1282.173517][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1282.173928][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1282.174399][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1282.174821][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1282.175374][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1282.175865][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1282.176278][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1282.176727][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1282.177340][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1282.177696][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1282.178028][ T70] kthread (kernel/kthread.c:388) 
[ 1282.178318][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1282.178733][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1282.179168][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1282.179584][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1282.348163][   T70] ------------[ cut here ]------------
| [ 1282.348671][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1282.349314][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1282.350110][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1282.351806][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1282.352872][   T70] Workqueue: netns cleanup_net
[ 1282.353277][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.353748][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1282.355322][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1282.355863][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1282.356557][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1282.357231][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1282.357915][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800721a628
[ 1282.358563][   T70] R13: ffff88800721adf8 R14: ffffc9000050fc98 R15: ffff88800721abc0
[ 1282.359190][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1282.359878][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1282.360392][   T70] CR2: 00007fcc80468000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1282.361024][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1282.361744][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1282.362446][   T70] Call Trace:
[ 1282.362723][   T70]  <TASK>
[ 1282.362981][ T70] ? __warn (kernel/panic.c:677) 
[ 1282.363354][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1282.363774][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.364266][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1282.364677][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1282.365101][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1282.365526][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1282.365973][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1282.366368][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1282.366835][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1282.367284][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1282.367747][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1282.368170][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1282.368608][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1282.369068][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1282.369485][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1282.369950][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1282.370379][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1282.370864][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1282.371302][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1282.371672][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1282.372056][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1282.372629][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1282.373069][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1282.373531][ T70] kthread (kernel/kthread.c:388) 
[ 1282.373908][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1282.374352][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1282.374767][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1282.375176][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1302.695399][   T70] ------------[ cut here ]------------
| [ 1302.695747][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1302.696126][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1302.696630][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1302.697651][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1302.698307][   T70] Workqueue: netns cleanup_net
[ 1302.698612][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.698993][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1302.700092][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1302.700461][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1302.700935][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1302.701414][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1302.701835][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009a1a628
[ 1302.702258][   T70] R13: ffff888009a1adf8 R14: ffffc9000050fc98 R15: ffff888009a1abc0
[ 1302.702679][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1302.703150][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1302.703555][   T70] CR2: 00007f62eb9ded40 CR3: 0000000006342004 CR4: 00000000001706f0
[ 1302.704036][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1302.704530][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1302.705023][   T70] Call Trace:
[ 1302.705252][   T70]  <TASK>
[ 1302.705457][ T70] ? __warn (kernel/panic.c:677) 
[ 1302.705700][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1302.706023][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.706353][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1302.706624][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1302.706885][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1302.707186][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1302.707517][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1302.707781][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.708139][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1302.708427][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1302.708723][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1302.709042][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1302.709336][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1302.709643][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1302.709930][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1302.710251][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1302.710605][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1302.710973][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1302.711314][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1302.711592][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1302.711897][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1302.712295][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1302.712649][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1302.712956][ T70] kthread (kernel/kthread.c:388) 
[ 1302.713198][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1302.713487][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1302.713772][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1302.714062][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1302.918923][   T70] ------------[ cut here ]------------
| [ 1302.919405][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1302.919941][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1302.920663][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1302.921903][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1302.922721][   T70] Workqueue: netns cleanup_net
[ 1302.922994][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.923354][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1302.924643][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1302.925024][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1302.925575][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1302.926063][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1302.926509][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ccaa628
[ 1302.926940][   T70] R13: ffff88800ccaadf8 R14: ffffc9000050fc98 R15: ffff88800ccaabc0
[ 1302.927376][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1302.927859][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1302.928226][   T70] CR2: 00007fcf05463000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1302.928698][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1302.929224][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1302.929686][   T70] Call Trace:
[ 1302.929940][   T70]  <TASK>
[ 1302.930110][ T70] ? __warn (kernel/panic.c:677) 
[ 1302.930349][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1302.930674][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.931040][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1302.931314][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1302.931593][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1302.931897][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1302.932237][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1302.932524][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1302.932863][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1302.933127][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1302.933422][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1302.933668][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1302.933928][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1302.934222][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1302.934480][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1302.934771][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1302.935040][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1302.935383][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1302.935682][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1302.935934][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1302.936200][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1302.936630][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1302.936983][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1302.937328][ T70] kthread (kernel/kthread.c:388) 
[ 1302.937571][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1302.937849][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1302.938158][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1302.938471][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1303.138569][   T70] ------------[ cut here ]------------
| [ 1303.138942][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1303.139416][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1303.139947][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1303.141103][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1303.141814][   T70] Workqueue: netns cleanup_net
[ 1303.142086][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.142446][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1303.143613][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1303.143977][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1303.144451][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1303.144878][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1303.145318][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c25a628
[ 1303.145752][   T70] R13: ffff88800c25adf8 R14: ffffc9000050fc98 R15: ffff88800c25abc0
[ 1303.146181][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1303.146665][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1303.147028][   T70] CR2: 00007f07ae819000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1303.147484][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1303.147924][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1303.148381][   T70] Call Trace:
[ 1303.148567][   T70]  <TASK>
[ 1303.148734][ T70] ? __warn (kernel/panic.c:677) 
[ 1303.148989][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1303.149297][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.149584][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1303.149830][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1303.150083][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1303.150347][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1303.150687][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1303.151042][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.151465][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1303.151838][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1303.152265][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1303.152619][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1303.152988][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1303.153392][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1303.153765][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1303.154122][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1303.154402][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1303.154751][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1303.155102][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1303.155375][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1303.155632][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1303.156032][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1303.156359][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1303.156657][ T70] kthread (kernel/kthread.c:388) 
[ 1303.156891][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1303.157170][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1303.157428][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1303.157724][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1303.395572][   T70] ------------[ cut here ]------------
| [ 1303.395902][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1303.396364][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1303.396965][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1303.398217][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1303.398936][   T70] Workqueue: netns cleanup_net
[ 1303.399269][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.399606][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1303.401041][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1303.401583][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1303.402217][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1303.402864][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1303.403536][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005d8a628
[ 1303.404254][   T70] R13: ffff888005d8adf8 R14: ffffc9000050fc98 R15: ffff888005d8abc0
[ 1303.404989][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1303.405751][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1303.406281][   T70] CR2: 00007fb78d930000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1303.406897][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1303.407525][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1303.408139][   T70] Call Trace:
[ 1303.408414][   T70]  <TASK>
[ 1303.408654][ T70] ? __warn (kernel/panic.c:677) 
[ 1303.408982][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1303.409374][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.409786][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1303.410211][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1303.410631][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1303.411021][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1303.411492][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1303.411794][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1303.412080][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1303.412372][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1303.412745][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1303.413007][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1303.413302][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1303.413608][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1303.413897][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1303.414228][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1303.414572][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1303.414959][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1303.415307][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1303.415613][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1303.415884][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1303.416309][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1303.416633][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1303.416908][ T70] kthread (kernel/kthread.c:388) 
[ 1303.417129][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1303.417385][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1303.417680][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1303.417928][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1323.228717][   T70] ------------[ cut here ]------------
| [ 1323.229095][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1323.229548][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1323.230104][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1323.231325][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1323.232063][   T70] Workqueue: netns cleanup_net
[ 1323.232341][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.232704][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1323.233799][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1323.234200][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1323.234662][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1323.235133][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1323.235625][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c24a628
[ 1323.236091][   T70] R13: ffff88800c24adf8 R14: ffffc9000050fc98 R15: ffff88800c24abc0
[ 1323.236567][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1323.237126][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1323.237549][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304005 CR4: 00000000001706f0
[ 1323.238029][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1323.238471][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1323.238906][   T70] Call Trace:
[ 1323.239091][   T70]  <TASK>
[ 1323.239266][ T70] ? __warn (kernel/panic.c:677) 
[ 1323.239501][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1323.239776][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.240062][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1323.240334][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1323.240574][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1323.240898][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1323.241242][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1323.241530][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.241855][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1323.242155][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1323.242451][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1323.242719][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.243046][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1323.243385][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.243694][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1323.244036][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1323.244369][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1323.244763][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1323.245102][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1323.245405][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1323.245714][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1323.246134][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.246472][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.246763][ T70] kthread (kernel/kthread.c:388) 
[ 1323.246994][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.247271][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1323.247526][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.247793][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1323.435610][   T70] ------------[ cut here ]------------
| [ 1323.435982][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1323.436417][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1323.436959][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1323.438168][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1323.438882][   T70] Workqueue: netns cleanup_net
[ 1323.439148][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.439592][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1323.440670][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1323.441023][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1323.441496][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1323.441959][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1323.442433][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800e782628
[ 1323.442887][   T70] R13: ffff88800e782df8 R14: ffffc9000050fc98 R15: ffff88800e782bc0
[ 1323.443388][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1323.443906][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1323.444311][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304005 CR4: 00000000001706f0
[ 1323.444764][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1323.445203][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1323.445638][   T70] Call Trace:
[ 1323.445818][   T70]  <TASK>
[ 1323.445979][ T70] ? __warn (kernel/panic.c:677) 
[ 1323.446209][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1323.446468][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.446753][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1323.447023][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1323.447306][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1323.447585][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1323.447911][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1323.448176][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.448493][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1323.448773][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1323.449085][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1323.449372][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.449649][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1323.449944][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.450204][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1323.450522][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1323.450841][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1323.451209][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1323.451537][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1323.451793][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1323.452082][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1323.452491][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.452805][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.453098][ T70] kthread (kernel/kthread.c:388) 
[ 1323.453376][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.453667][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1323.453941][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.454233][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1323.651285][   T70] ------------[ cut here ]------------
| [ 1323.651788][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1323.652391][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1323.653188][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1323.654800][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1323.655858][   T70] Workqueue: netns cleanup_net
[ 1323.656267][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.656790][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1323.658247][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1323.658584][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1323.659014][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1323.659446][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1323.659891][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800cdc2628
[ 1323.660320][   T70] R13: ffff88800cdc2df8 R14: ffffc9000050fc98 R15: ffff88800cdc2bc0
[ 1323.660759][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1323.661309][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1323.661743][   T70] CR2: 00007ff62eb13270 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1323.662230][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1323.662710][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1323.663209][   T70] Call Trace:
[ 1323.663430][   T70]  <TASK>
[ 1323.663617][ T70] ? __warn (kernel/panic.c:677) 
[ 1323.663872][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1323.664185][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.664514][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1323.664797][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1323.665062][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1323.665365][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1323.665680][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1323.665945][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.666255][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1323.666547][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1323.666857][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1323.667122][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.667415][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1323.667777][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.668141][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1323.668588][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1323.668992][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1323.669510][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1323.669961][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1323.670375][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1323.670775][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1323.671334][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.671738][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.672139][ T70] kthread (kernel/kthread.c:388) 
[ 1323.672474][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.672838][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1323.673204][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.673562][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1323.840307][   T70] ------------[ cut here ]------------
| [ 1323.840623][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1323.841039][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1323.841562][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1323.842630][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1323.843301][   T70] Workqueue: netns cleanup_net
[ 1323.843565][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.843882][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1323.844944][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1323.845304][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1323.845787][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1323.846254][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1323.846731][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006902628
[ 1323.847204][   T70] R13: ffff888006902df8 R14: ffffc9000050fc98 R15: ffff888006902bc0
[ 1323.847671][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1323.848221][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1323.848593][   T70] CR2: 00007fdc35dab000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1323.849074][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1323.849524][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1323.849993][   T70] Call Trace:
[ 1323.850180][   T70]  <TASK>
[ 1323.850369][ T70] ? __warn (kernel/panic.c:677) 
[ 1323.850618][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1323.850914][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.851228][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1323.851519][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1323.851778][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1323.852066][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1323.852375][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1323.852643][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1323.852939][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1323.853242][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1323.853544][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1323.853793][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.854058][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1323.854334][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1323.854587][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1323.854866][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1323.855138][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1323.855493][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1323.855829][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1323.856106][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1323.856400][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1323.856797][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.857082][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1323.857380][ T70] kthread (kernel/kthread.c:388) 
[ 1323.857629][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.857892][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1323.858150][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1323.858429][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1343.525637][   T70] ------------[ cut here ]------------
| [ 1343.525957][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1343.526345][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1343.526844][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1343.527933][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1343.528595][   T70] Workqueue: netns cleanup_net
[ 1343.528864][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.529179][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1343.530232][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1343.530564][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1343.530996][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1343.531435][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1343.531870][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880059b2628
[ 1343.532307][   T70] R13: ffff8880059b2df8 R14: ffffc9000050fc98 R15: ffff8880059b2bc0
[ 1343.532771][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1343.533284][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1343.533731][   T70] CR2: 00007f0942550a30 CR3: 0000000006342001 CR4: 00000000001706f0
[ 1343.534224][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1343.534710][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1343.535215][   T70] Call Trace:
[ 1343.535429][   T70]  <TASK>
[ 1343.535617][ T70] ? __warn (kernel/panic.c:677) 
[ 1343.535863][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1343.536156][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.536502][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1343.536791][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1343.537074][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1343.537362][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1343.537678][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1343.537960][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.538294][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1343.538577][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1343.538926][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1343.539201][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.539512][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1343.539829][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.540107][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1343.540471][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1343.540773][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1343.541141][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1343.541495][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1343.541769][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1343.542061][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1343.542504][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.542782][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.543057][ T70] kthread (kernel/kthread.c:388) 
[ 1343.543285][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.543537][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1343.543778][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.544032][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1343.727544][   T70] ------------[ cut here ]------------
| [ 1343.727853][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1343.728251][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1343.728782][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1343.729983][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1343.730695][   T70] Workqueue: netns cleanup_net
[ 1343.730994][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.731329][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1343.732377][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1343.732710][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1343.733133][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1343.733592][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1343.734054][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020052628
[ 1343.734547][   T70] R13: ffff888020052df8 R14: ffffc9000050fc98 R15: ffff888020052bc0
[ 1343.735011][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1343.735537][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1343.735918][   T70] CR2: 00007f524e0700d0 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1343.736389][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1343.736815][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1343.737256][   T70] Call Trace:
[ 1343.737470][   T70]  <TASK>
[ 1343.737631][ T70] ? __warn (kernel/panic.c:677) 
[ 1343.737887][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1343.738165][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.738491][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1343.738772][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1343.739010][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1343.739323][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1343.739608][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1343.739895][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.740187][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1343.740497][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1343.740808][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1343.741053][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.741381][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1343.741657][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.741950][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1343.742282][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1343.742581][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1343.742914][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1343.743247][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1343.743508][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1343.743805][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1343.744223][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.744527][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.744842][ T70] kthread (kernel/kthread.c:388) 
[ 1343.745111][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.745422][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1343.745689][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.745953][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1343.937302][   T70] ------------[ cut here ]------------
| [ 1343.937609][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1343.938000][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1343.938596][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1343.939664][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1343.940321][   T70] Workqueue: netns cleanup_net
[ 1343.940588][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.940908][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1343.941953][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1343.942294][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1343.942746][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1343.943229][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1343.943725][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009882628
[ 1343.944210][   T70] R13: ffff888009882df8 R14: ffffc9000050fc98 R15: ffff888009882bc0
[ 1343.944741][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1343.945263][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1343.945706][   T70] CR2: 00007f5aa6a90000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1343.946207][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1343.946687][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1343.947175][   T70] Call Trace:
[ 1343.947389][   T70]  <TASK>
[ 1343.947553][ T70] ? __warn (kernel/panic.c:677) 
[ 1343.947814][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1343.948105][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.948416][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1343.948739][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1343.949013][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1343.949303][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1343.949614][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1343.949887][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1343.950212][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1343.950520][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1343.950844][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1343.951117][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.951440][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1343.951726][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1343.952012][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1343.952319][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1343.952587][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1343.952913][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1343.953207][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1343.953458][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1343.953715][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1343.954087][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.954403][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1343.954755][ T70] kthread (kernel/kthread.c:388) 
[ 1343.955013][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.955291][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1343.955564][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1343.955876][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1344.132721][   T70] ------------[ cut here ]------------
| [ 1344.133103][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1344.133596][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1344.134161][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1344.135337][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1344.136143][   T70] Workqueue: netns cleanup_net
[ 1344.136485][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1344.136858][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1344.137977][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1344.138371][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1344.138880][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1344.139366][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1344.139840][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800857a628
[ 1344.140340][   T70] R13: ffff88800857adf8 R14: ffffc9000050fc98 R15: ffff88800857abc0
[ 1344.140834][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1344.141363][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1344.141742][   T70] CR2: 00007f0500971000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1344.142221][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1344.142704][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1344.143186][   T70] Call Trace:
[ 1344.143406][   T70]  <TASK>
[ 1344.143567][ T70] ? __warn (kernel/panic.c:677) 
[ 1344.143834][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1344.144148][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1344.144481][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1344.144763][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1344.145049][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1344.145390][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1344.145715][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1344.145993][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1344.146326][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1344.146602][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1344.146933][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1344.147241][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1344.147510][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1344.147791][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1344.148054][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1344.148352][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1344.148627][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1344.148981][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1344.149287][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1344.149541][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1344.149808][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1344.150231][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1344.150562][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1344.150871][ T70] kthread (kernel/kthread.c:388) 
[ 1344.151132][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1344.151455][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1344.151741][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1344.152049][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1363.611559][   T70] ------------[ cut here ]------------
| [ 1363.611873][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1363.612256][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1363.612744][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1363.613803][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1363.614473][   T70] Workqueue: netns cleanup_net
[ 1363.614737][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.615052][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1363.616268][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1363.616691][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1363.617112][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1363.617615][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1363.618142][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ca3a628
[ 1363.618645][   T70] R13: ffff88800ca3adf8 R14: ffffc9000050fc98 R15: ffff88800ca3abc0
[ 1363.619142][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1363.619713][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1363.620144][   T70] CR2: 00007f770db84000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1363.620614][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1363.621123][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1363.621586][   T70] Call Trace:
[ 1363.621806][   T70]  <TASK>
[ 1363.621978][ T70] ? __warn (kernel/panic.c:677) 
[ 1363.622209][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1363.622468][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.622752][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1363.623003][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1363.623243][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1363.623497][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1363.623785][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1363.624024][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.624313][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1363.624568][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1363.624851][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1363.625094][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1363.625369][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1363.625635][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1363.625915][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1363.626232][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1363.626572][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1363.626943][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1363.627262][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1363.627557][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1363.627859][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1363.628285][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1363.628598][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1363.628907][ T70] kthread (kernel/kthread.c:388) 
[ 1363.629166][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1363.629480][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1363.629752][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1363.630048][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1363.815411][   T70] ------------[ cut here ]------------
| [ 1363.815766][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1363.816177][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1363.816679][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1363.817860][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1363.818571][   T70] Workqueue: netns cleanup_net
[ 1363.818832][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.819147][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1363.820187][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1363.820523][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1363.820944][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1363.821369][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1363.821790][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007dea628
[ 1363.822270][   T70] R13: ffff888007deadf8 R14: ffffc9000050fc98 R15: ffff888007deabc0
[ 1363.822775][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1363.823324][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1363.823767][   T70] CR2: 00007f770db84000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1363.824271][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1363.824736][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1363.825244][   T70] Call Trace:
[ 1363.825435][   T70]  <TASK>
[ 1363.825618][ T70] ? __warn (kernel/panic.c:677) 
[ 1363.825887][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1363.826177][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.826516][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1363.826805][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1363.827074][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1363.827373][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1363.827696][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1363.827957][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1363.828285][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1363.828568][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1363.828901][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1363.829182][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1363.829490][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1363.829814][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1363.830088][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1363.830410][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1363.830690][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1363.831060][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1363.831412][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1363.831664][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1363.831914][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1363.832273][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1363.832549][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1363.832827][ T70] kthread (kernel/kthread.c:388) 
[ 1363.833044][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1363.833301][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1363.833541][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1363.833805][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1364.015328][   T70] ------------[ cut here ]------------
| [ 1364.015637][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1364.016016][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1364.016512][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1364.017536][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1364.018335][   T70] Workqueue: netns cleanup_net
[ 1364.018647][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.019023][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1364.020115][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1364.020448][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1364.020869][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1364.021295][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1364.021717][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800957a628
[ 1364.022169][   T70] R13: ffff88800957adf8 R14: ffffc9000050fc98 R15: ffff88800957abc0
[ 1364.022681][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1364.023251][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1364.023694][   T70] CR2: 00007f770db84000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1364.024221][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1364.024735][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1364.025198][   T70] Call Trace:
[ 1364.025377][   T70]  <TASK>
[ 1364.025536][ T70] ? __warn (kernel/panic.c:677) 
[ 1364.025759][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1364.026023][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.026308][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1364.026571][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1364.026829][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1364.027114][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1364.027440][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1364.027737][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.028049][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1364.028389][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1364.028690][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1364.028990][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1364.029285][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1364.029570][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1364.029890][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1364.030207][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1364.030546][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1364.030927][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1364.031268][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1364.031600][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1364.031885][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1364.032296][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1364.032629][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1364.032928][ T70] kthread (kernel/kthread.c:388) 
[ 1364.033184][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1364.033516][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1364.033780][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1364.034112][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1364.205353][   T70] ------------[ cut here ]------------
| [ 1364.205725][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1364.206103][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1364.206602][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1364.207627][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1364.208321][   T70] Workqueue: netns cleanup_net
[ 1364.208663][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.209028][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1364.210152][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1364.210514][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1364.211009][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1364.211516][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1364.212006][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c61a628
[ 1364.212432][   T70] R13: ffff88800c61adf8 R14: ffffc9000050fc98 R15: ffff88800c61abc0
[ 1364.212853][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1364.213333][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1364.213686][   T70] CR2: 00007f770db84000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1364.214120][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1364.214619][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1364.215122][   T70] Call Trace:
[ 1364.215322][   T70]  <TASK>
[ 1364.215519][ T70] ? __warn (kernel/panic.c:677) 
[ 1364.215786][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1364.216107][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.216425][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1364.216718][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1364.216984][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1364.217281][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1364.217605][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1364.217873][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1364.218235][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1364.218515][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1364.218857][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1364.219156][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1364.219455][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1364.219747][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1364.220067][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1364.220390][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1364.220699][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1364.221092][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1364.221438][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1364.221732][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1364.222028][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1364.222445][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1364.222747][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1364.223049][ T70] kthread (kernel/kthread.c:388) 
[ 1364.223333][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1364.223635][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1364.223902][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1364.224236][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1383.370427][   T70] ------------[ cut here ]------------
| [ 1383.370770][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1383.371213][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1383.371718][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1383.372817][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1383.373501][   T70] Workqueue: netns cleanup_net
[ 1383.373841][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.374181][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1383.375270][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1383.375612][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1383.376031][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1383.376483][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1383.376931][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a81a628
[ 1383.377449][   T70] R13: ffff88800a81adf8 R14: ffffc9000050fc98 R15: ffff88800a81abc0
[ 1383.377910][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1383.378418][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1383.378819][   T70] CR2: 00007f3314cdc000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1383.379312][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1383.379802][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1383.380233][   T70] Call Trace:
[ 1383.380417][   T70]  <TASK>
[ 1383.380578][ T70] ? __warn (kernel/panic.c:677) 
[ 1383.380806][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.381098][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1383.381365][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1383.381600][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1383.381898][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1383.382209][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1383.382507][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.382799][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1383.383113][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1383.383463][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1383.383742][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.384053][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1383.384353][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.384668][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1383.384969][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1383.385268][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1383.385625][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1383.385913][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1383.386187][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1383.386479][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1383.386845][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.387163][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.387458][ T70] kthread (kernel/kthread.c:388) 
[ 1383.387691][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.387955][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1383.388228][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.388496][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1383.572409][   T70] ------------[ cut here ]------------
| [ 1383.572762][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1383.573163][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1383.573771][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1383.574815][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1383.575488][   T70] Workqueue: netns cleanup_net
[ 1383.575743][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.576054][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1383.577214][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1383.577614][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1383.578096][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1383.578571][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1383.579042][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888020232628
[ 1383.579532][   T70] R13: ffff888020232df8 R14: ffffc9000050fc98 R15: ffff888020232bc0
[ 1383.580021][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1383.580530][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1383.580886][   T70] CR2: 00007f3314cdc000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1383.581327][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1383.581782][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1383.582306][   T70] Call Trace:
[ 1383.582502][   T70]  <TASK>
[ 1383.582675][ T70] ? __warn (kernel/panic.c:677) 
[ 1383.582934][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1383.583255][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.583550][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1383.583837][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1383.584104][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1383.584413][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1383.584746][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1383.585007][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.585373][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1383.585658][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1383.585967][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1383.586266][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.586518][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1383.586828][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.587110][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1383.587426][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1383.587746][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1383.588093][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1383.588408][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1383.588690][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1383.588993][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1383.589382][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.589683][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.589995][ T70] kthread (kernel/kthread.c:388) 
[ 1383.590217][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.590459][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1383.590696][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.590937][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1383.759579][   T70] ------------[ cut here ]------------
| [ 1383.760027][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1383.760734][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1383.761526][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1383.763152][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1383.764174][   T70] Workqueue: netns cleanup_net
[ 1383.764573][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.765041][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1383.766510][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1383.767061][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1383.767796][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1383.768477][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1383.769158][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005ac2628
[ 1383.769858][   T70] R13: ffff888005ac2df8 R14: ffffc9000050fc98 R15: ffff888005ac2bc0
[ 1383.770553][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1383.771336][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1383.771929][   T70] CR2: 00007ffee1d0d978 CR3: 0000000020304006 CR4: 00000000001706f0
[ 1383.772610][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1383.773318][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1383.774074][   T70] Call Trace:
[ 1383.774414][   T70]  <TASK>
[ 1383.774695][ T70] ? __warn (kernel/panic.c:677) 
[ 1383.775089][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1383.775564][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.776045][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1383.776482][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1383.776890][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1383.777346][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1383.777807][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1383.778235][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.778718][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1383.779160][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1383.779650][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1383.780056][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.780506][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1383.780980][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.781430][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1383.781898][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1383.782366][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1383.782913][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1383.783416][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1383.783851][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1383.784312][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1383.784903][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.785388][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1383.785845][ T70] kthread (kernel/kthread.c:388) 
[ 1383.786178][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.786563][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1383.786925][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1383.787321][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1383.983285][   T70] ------------[ cut here ]------------
| [ 1383.983603][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1383.984024][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1383.984530][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1383.985680][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1383.986387][   T70] Workqueue: netns cleanup_net
[ 1383.986671][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.987025][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1383.988199][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1383.988558][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1383.989038][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1383.989502][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1383.989971][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005f32628
[ 1383.990449][   T70] R13: ffff888005f32df8 R14: ffffc9000050fc98 R15: ffff888005f32bc0
[ 1383.990896][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1383.991379][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1383.991734][   T70] CR2: 00007fd32c846270 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1383.992179][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1383.992624][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1383.993057][   T70] Call Trace:
[ 1383.993244][   T70]  <TASK>
[ 1383.993408][ T70] ? __warn (kernel/panic.c:677) 
[ 1383.993628][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1383.993907][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.994199][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1383.994467][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1383.994749][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1383.995010][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1383.995327][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1383.995586][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1383.995873][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1383.996142][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1383.996491][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1383.996742][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.997010][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1383.997327][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1383.997586][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1383.997900][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1383.998203][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1383.998534][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1383.998873][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1383.999148][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1383.999414][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1383.999813][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1384.000114][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1384.000415][ T70] kthread (kernel/kthread.c:388) 
[ 1384.000659][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1384.000934][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1384.001203][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1384.001476][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1403.127398][   T70] ------------[ cut here ]------------
| [ 1403.127729][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1403.128205][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1403.128747][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1403.129913][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1403.130646][   T70] Workqueue: netns cleanup_net
[ 1403.130947][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.131301][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1403.132476][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1403.132830][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1403.133289][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1403.133724][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1403.134154][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005faa628
[ 1403.134584][   T70] R13: ffff888005faadf8 R14: ffffc9000050fc98 R15: ffff888005faabc0
[ 1403.135002][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1403.135479][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1403.135899][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304002 CR4: 00000000001706f0
[ 1403.136361][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1403.136813][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1403.137256][   T70] Call Trace:
[ 1403.137458][   T70]  <TASK>
[ 1403.137645][ T70] ? __warn (kernel/panic.c:677) 
[ 1403.137901][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.138210][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1403.138485][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1403.138748][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1403.139043][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1403.139356][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1403.139637][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.139943][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1403.140229][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1403.140532][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1403.140797][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.141088][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1403.141379][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.141631][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1403.141907][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1403.142187][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1403.142516][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1403.142809][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1403.143066][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1403.143331][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1403.143689][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.143979][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.144302][ T70] kthread (kernel/kthread.c:388) 
[ 1403.144542][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.144798][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1403.145078][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.145368][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1403.334338][   T70] ------------[ cut here ]------------
| [ 1403.334643][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1403.335100][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1403.335637][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1403.336745][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1403.337454][   T70] Workqueue: netns cleanup_net
[ 1403.337753][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.338097][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1403.339251][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1403.339590][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1403.340050][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1403.340524][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1403.340993][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009962628
[ 1403.341449][   T70] R13: ffff888009962df8 R14: ffffc9000050fc98 R15: ffff888009962bc0
[ 1403.341920][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1403.342418][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1403.342772][   T70] CR2: 00007f82a0470000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1403.343206][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1403.343639][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1403.344067][   T70] Call Trace:
[ 1403.344276][   T70]  <TASK>
[ 1403.344466][ T70] ? __warn (kernel/panic.c:677) 
[ 1403.344719][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1403.345018][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.345317][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1403.345617][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1403.345859][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1403.346128][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1403.346429][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1403.346685][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.347007][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1403.347289][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1403.347589][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1403.347855][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.348146][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1403.348429][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.348732][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1403.349033][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1403.349347][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1403.349711][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1403.350026][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1403.350309][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1403.350586][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1403.350976][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.351270][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.351574][ T70] kthread (kernel/kthread.c:388) 
[ 1403.351827][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.352104][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1403.352366][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.352648][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1403.514410][   T70] ------------[ cut here ]------------
| [ 1403.514741][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1403.515156][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1403.515712][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1403.516747][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1403.517399][   T70] Workqueue: netns cleanup_net
[ 1403.517702][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.518048][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1403.519163][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1403.519495][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1403.519916][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1403.520342][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1403.520761][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800673a628
[ 1403.521181][   T70] R13: ffff88800673adf8 R14: ffffc9000050fc98 R15: ffff88800673abc0
[ 1403.521677][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1403.522199][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1403.522602][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1403.523026][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1403.523518][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1403.524024][   T70] Call Trace:
[ 1403.524231][   T70]  <TASK>
[ 1403.524394][ T70] ? __warn (kernel/panic.c:677) 
[ 1403.524637][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1403.524918][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.525245][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1403.525509][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1403.525762][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1403.526053][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1403.526363][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1403.526622][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.526962][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1403.527234][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1403.527565][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1403.527825][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.528108][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1403.528423][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.528693][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1403.529003][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1403.529299][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1403.529649][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1403.529955][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1403.530239][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1403.530495][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1403.530848][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.531125][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.531406][ T70] kthread (kernel/kthread.c:388) 
[ 1403.531629][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.531876][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1403.532119][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.532405][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1403.716343][   T70] ------------[ cut here ]------------
| [ 1403.716669][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1403.717095][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1403.717624][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1403.718761][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1403.719468][   T70] Workqueue: netns cleanup_net
[ 1403.719764][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.720117][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1403.721314][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1403.721670][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1403.722144][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1403.722613][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1403.723091][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800c9ea628
[ 1403.723562][   T70] R13: ffff88800c9eadf8 R14: ffffc9000050fc98 R15: ffff88800c9eabc0
[ 1403.724030][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1403.724590][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1403.724976][   T70] CR2: 00007fd5399e9270 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1403.725472][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1403.725900][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1403.726333][   T70] Call Trace:
[ 1403.726519][   T70]  <TASK>
[ 1403.726681][ T70] ? __warn (kernel/panic.c:677) 
[ 1403.726904][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1403.727162][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.727450][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1403.727700][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1403.727956][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1403.728247][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1403.728554][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1403.728811][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1403.729126][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1403.729419][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1403.729739][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1403.730012][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.730301][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1403.730596][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1403.730878][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1403.731206][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1403.731482][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1403.731855][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1403.732170][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1403.732450][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1403.732740][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1403.733138][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.733473][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1403.733799][ T70] kthread (kernel/kthread.c:388) 
[ 1403.734040][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.734325][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1403.734591][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1403.734860][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1430.452138][   T70] ------------[ cut here ]------------
| [ 1430.452528][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1430.452976][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1430.453781][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1430.454851][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1430.455555][   T70] Workqueue: netns cleanup_net
[ 1430.455871][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.456234][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1430.457292][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1430.457669][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1430.458128][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1430.458600][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1430.459048][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800949a628
[ 1430.459515][   T70] R13: ffff88800949adf8 R14: ffffc9000050fc98 R15: ffff88800949abc0
[ 1430.459983][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1430.460506][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1430.460881][   T70] CR2: 00007ffde5adfeb8 CR3: 0000000006756003 CR4: 00000000001706f0
[ 1430.461356][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1430.461812][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1430.462283][   T70] Call Trace:
[ 1430.462482][   T70]  <TASK>
[ 1430.462646][ T70] ? __warn (kernel/panic.c:677) 
[ 1430.462904][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1430.463224][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.463556][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1430.463838][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1430.464113][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1430.464418][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1430.464694][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1430.464938][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.465223][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1430.465473][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1430.465763][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1430.466014][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.466283][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1430.466554][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.466806][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1430.467081][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1430.467387][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1430.467736][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1430.468061][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1430.468351][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1430.468633][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1430.469009][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.469332][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.469642][ T70] kthread (kernel/kthread.c:388) 
[ 1430.469904][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.470170][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1430.470457][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.470747][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1430.647552][   T70] ------------[ cut here ]------------
| [ 1430.647930][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1430.648343][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1430.648874][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1430.649997][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1430.650764][   T70] Workqueue: netns cleanup_net
[ 1430.651089][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.651437][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1430.652517][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1430.652907][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1430.653369][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1430.653837][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1430.654272][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005f7a628
[ 1430.654694][   T70] R13: ffff888005f7adf8 R14: ffffc9000050fc98 R15: ffff888005f7abc0
[ 1430.655113][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1430.655594][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1430.655946][   T70] CR2: 00007ffde5adfeb8 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1430.656376][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1430.656801][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1430.657289][   T70] Call Trace:
[ 1430.657485][   T70]  <TASK>
[ 1430.657716][ T70] ? __warn (kernel/panic.c:677) 
[ 1430.657978][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.658304][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1430.658573][ T70] ? restore_regs_and_return_to_kernel (arch/x86/entry/entry_64.S:658) 
[ 1430.658937][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1430.659170][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1430.659429][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1430.659738][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1430.660026][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.660355][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1430.660625][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1430.660947][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1430.661216][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.661494][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1430.661774][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.662046][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1430.662354][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1430.662658][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1430.663020][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1430.663321][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1430.663578][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1430.663833][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1430.664198][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.664476][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.664750][ T70] kthread (kernel/kthread.c:388) 
[ 1430.664970][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.665226][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1430.665467][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.665713][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1430.869284][   T70] ------------[ cut here ]------------
| [ 1430.869659][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1430.870075][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1430.870629][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1430.871733][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1430.872390][   T70] Workqueue: netns cleanup_net
[ 1430.872651][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.872970][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1430.874018][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1430.874397][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1430.874862][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1430.875362][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1430.875836][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006152628
[ 1430.876305][   T70] R13: ffff888006152df8 R14: ffffc9000050fc98 R15: ffff888006152bc0
[ 1430.876782][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1430.877323][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1430.877699][   T70] CR2: 00007fc3aef71000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1430.878197][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1430.878666][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1430.879139][   T70] Call Trace:
[ 1430.879345][   T70]  <TASK>
[ 1430.879525][ T70] ? __warn (kernel/panic.c:677) 
[ 1430.879767][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1430.880051][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.880375][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1430.880639][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1430.880921][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1430.881203][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1430.881510][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1430.881787][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1430.882095][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1430.882357][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1430.882748][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1430.883060][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.883443][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1430.883821][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1430.884238][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1430.884674][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1430.885112][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1430.885634][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1430.886073][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1430.886492][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1430.886889][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1430.887451][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.887908][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1430.888336][ T70] kthread (kernel/kthread.c:388) 
[ 1430.888693][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.889081][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1430.889479][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1430.889859][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1431.065372][   T70] ------------[ cut here ]------------
| [ 1431.065683][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1431.066075][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1431.066640][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1431.067737][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1431.068447][   T70] Workqueue: netns cleanup_net
[ 1431.068716][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1431.069044][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1431.070232][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1431.070589][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1431.071049][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1431.071523][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1431.071946][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007d92628
[ 1431.072375][   T70] R13: ffff888007d92df8 R14: ffffc9000050fc98 R15: ffff888007d92bc0
[ 1431.072802][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1431.073284][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1431.073646][   T70] CR2: 00007fc3aef71000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1431.074068][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1431.074497][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1431.074919][   T70] Call Trace:
[ 1431.075102][   T70]  <TASK>
[ 1431.075320][ T70] ? __warn (kernel/panic.c:677) 
[ 1431.075549][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1431.075834][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1431.076154][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1431.076419][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1431.076701][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1431.076975][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1431.077284][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1431.077545][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1431.077853][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1431.078130][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1431.078442][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1431.078698][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1431.078985][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1431.079278][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1431.079550][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1431.079838][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1431.080137][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1431.080477][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1431.080790][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1431.081077][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1431.081361][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1431.081731][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1431.082032][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1431.082342][ T70] kthread (kernel/kthread.c:388) 
[ 1431.082582][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1431.082845][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1431.083109][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1431.083397][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1456.885712][   T70] ------------[ cut here ]------------
| [ 1456.886030][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1456.886460][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1456.887015][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1456.888294][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1456.888976][   T70] Workqueue: netns cleanup_net
[ 1456.889315][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1456.889728][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1456.890804][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1456.891182][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1456.891659][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1456.892144][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1456.892687][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b0fa628
[ 1456.893162][   T70] R13: ffff88800b0fadf8 R14: ffffc9000050fc98 R15: ffff88800b0fabc0
[ 1456.893658][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1456.894204][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1456.894654][   T70] CR2: 000055b1407220f0 CR3: 00000000067dc001 CR4: 00000000001706f0
[ 1456.895139][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1456.895628][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1456.896058][   T70] Call Trace:
[ 1456.896256][   T70]  <TASK>
[ 1456.896419][ T70] ? __warn (kernel/panic.c:677) 
[ 1456.896646][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1456.896906][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1456.897190][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1456.897459][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1456.897695][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1456.897952][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1456.898234][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1456.898478][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1456.898830][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1456.899178][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1456.899522][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1456.899768][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1456.900074][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1456.900443][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1456.900697][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1456.900977][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1456.901308][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1456.901705][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1456.902043][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1456.902366][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1456.902679][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1456.903104][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1456.903467][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1456.903780][ T70] kthread (kernel/kthread.c:388) 
[ 1456.904002][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1456.904318][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1456.904584][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1456.904892][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1457.119389][   T70] ------------[ cut here ]------------
| [ 1457.119724][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1457.120159][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1457.120708][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1457.121836][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1457.122539][   T70] Workqueue: netns cleanup_net
[ 1457.122798][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.123114][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1457.124147][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1457.124481][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1457.124916][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1457.125345][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1457.125767][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007d62628
[ 1457.126205][   T70] R13: ffff888007d62df8 R14: ffffc9000050fc98 R15: ffff888007d62bc0
[ 1457.126630][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1457.127100][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.127457][   T70] CR2: 00007feebdb09270 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1457.127926][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1457.128388][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1457.128847][   T70] Call Trace:
[ 1457.129075][   T70]  <TASK>
[ 1457.129272][ T70] ? __warn (kernel/panic.c:677) 
[ 1457.129509][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1457.129833][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.130157][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1457.130442][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1457.130743][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1457.131031][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1457.131374][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1457.131670][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.131974][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1457.132268][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1457.132596][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1457.132868][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.133150][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1457.133478][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.133775][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1457.134120][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1457.134441][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1457.134802][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1457.135155][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1457.135443][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1457.135770][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1457.136185][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.136504][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.136830][ T70] kthread (kernel/kthread.c:388) 
[ 1457.137108][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.137395][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1457.137636][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.137897][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1457.313372][   T70] ------------[ cut here ]------------
| [ 1457.313782][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1457.314215][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1457.314835][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1457.316013][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1457.316690][   T70] Workqueue: netns cleanup_net
[ 1457.316950][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.317276][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1457.318307][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1457.318635][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1457.319068][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1457.319495][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1457.319914][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888005b8a628
[ 1457.320392][   T70] R13: ffff888005b8adf8 R14: ffffc9000050fc98 R15: ffff888005b8abc0
[ 1457.320919][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1457.321456][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.321913][   T70] CR2: 00007feebdb09270 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1457.322413][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1457.322941][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1457.323460][   T70] Call Trace:
[ 1457.323668][   T70]  <TASK>
[ 1457.323845][ T70] ? __warn (kernel/panic.c:677) 
[ 1457.324104][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.324453][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1457.324711][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1457.324996][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1457.325290][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1457.325641][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1457.325910][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.326234][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1457.326484][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1457.326773][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1457.327014][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.327273][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1457.327543][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.327831][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1457.328159][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1457.328517][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1457.328877][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1457.329228][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1457.329511][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1457.329808][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1457.330229][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.330534][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.330838][ T70] kthread (kernel/kthread.c:388) 
[ 1457.331109][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.331408][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1457.331684][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.331985][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1457.493384][   T70] ------------[ cut here ]------------
| [ 1457.493739][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1457.494200][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1457.494722][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1457.495751][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1457.496411][   T70] Workqueue: netns cleanup_net
[ 1457.496675][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.497024][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1457.498100][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1457.498438][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1457.498857][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1457.499283][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1457.499703][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888003bfa628
[ 1457.500130][   T70] R13: ffff888003bfadf8 R14: ffffc9000050fc98 R15: ffff888003bfabc0
[ 1457.500612][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1457.501151][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.501567][   T70] CR2: 00007fa9161a5270 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1457.502067][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1457.502512][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1457.503003][   T70] Call Trace:
[ 1457.503182][   T70]  <TASK>
[ 1457.503422][ T70] ? __warn (kernel/panic.c:677) 
[ 1457.503658][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.503979][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1457.504282][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1457.504519][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1457.504805][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1457.505080][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1457.505353][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1457.505677][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1457.505963][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1457.506274][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1457.506555][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.506842][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1457.507156][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1457.507425][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1457.507733][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1457.508040][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1457.508394][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1457.508706][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1457.508990][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1457.509285][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1457.509670][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.509955][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1457.510276][ T70] kthread (kernel/kthread.c:388) 
[ 1457.510543][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.510797][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1457.511051][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1457.511318][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1477.673943][   T70] ------------[ cut here ]------------
| [ 1477.674302][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1477.674697][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1477.675213][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1477.676256][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1477.676939][   T70] Workqueue: netns cleanup_net
[ 1477.677259][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.677644][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1477.678839][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1477.679244][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1477.679711][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1477.680244][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1477.680745][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880204d2628
[ 1477.681289][   T70] R13: ffff8880204d2df8 R14: ffffc9000050fc98 R15: ffff8880204d2bc0
[ 1477.681807][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1477.682376][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1477.682789][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1477.683309][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1477.683801][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1477.684274][   T70] Call Trace:
[ 1477.684497][   T70]  <TASK>
[ 1477.684656][ T70] ? __warn (kernel/panic.c:677) 
[ 1477.684929][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1477.685226][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.685542][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1477.685843][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1477.686121][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1477.686416][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1477.686749][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1477.687001][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.687310][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1477.687564][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1477.687848][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1477.688093][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1477.688368][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1477.688646][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1477.688915][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1477.689217][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1477.689497][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1477.689906][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1477.690293][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1477.690594][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1477.690877][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1477.691337][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1477.691663][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1477.691972][ T70] kthread (kernel/kthread.c:388) 
[ 1477.692242][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1477.692525][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1477.692826][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1477.693133][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1477.878534][   T70] ------------[ cut here ]------------
| [ 1477.878845][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1477.879233][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1477.879731][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1477.880960][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1477.881688][   T70] Workqueue: netns cleanup_net
[ 1477.881989][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.882381][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1477.883477][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1477.883851][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1477.884344][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1477.884801][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1477.885286][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009d6a628
[ 1477.885765][   T70] R13: ffff888009d6adf8 R14: ffffc9000050fc98 R15: ffff888009d6abc0
[ 1477.886236][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1477.886712][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1477.887067][   T70] CR2: 00007f8512101000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1477.887496][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1477.887918][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1477.888346][   T70] Call Trace:
[ 1477.888525][   T70]  <TASK>
[ 1477.888718][ T70] ? __warn (kernel/panic.c:677) 
[ 1477.888948][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1477.889251][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.889602][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1477.889890][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1477.890154][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1477.890468][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1477.890804][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1477.891091][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1477.891412][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1477.891710][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1477.892046][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1477.892337][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1477.892623][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1477.892926][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1477.893238][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1477.893561][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1477.893859][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1477.894225][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1477.894569][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1477.894864][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1477.895144][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1477.895558][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1477.895888][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1477.896221][ T70] kthread (kernel/kthread.c:388) 
[ 1477.896468][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1477.896769][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1477.897056][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1477.897361][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1478.098438][   T70] ------------[ cut here ]------------
| [ 1478.098780][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1478.099183][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1478.099687][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1478.100799][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1478.101512][   T70] Workqueue: netns cleanup_net
[ 1478.101776][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.102096][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1478.103136][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1478.103479][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1478.103958][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1478.104423][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1478.104908][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a9ea628
[ 1478.105374][   T70] R13: ffff88800a9eadf8 R14: ffffc9000050fc98 R15: ffff88800a9eabc0
[ 1478.105832][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1478.106367][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1478.106756][   T70] CR2: 00007f5570712000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1478.107238][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1478.107704][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1478.108180][   T70] Call Trace:
[ 1478.108392][   T70]  <TASK>
[ 1478.108569][ T70] ? __warn (kernel/panic.c:677) 
[ 1478.108836][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1478.109123][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.109435][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1478.109709][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1478.109988][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1478.110276][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1478.110582][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1478.110843][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.111152][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1478.111442][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1478.111750][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1478.112021][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1478.112299][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1478.112570][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1478.112826][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1478.113109][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1478.113391][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1478.113720][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1478.114015][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1478.114274][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1478.114568][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1478.114961][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1478.115265][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1478.115540][ T70] kthread (kernel/kthread.c:388) 
[ 1478.115765][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1478.116013][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1478.116271][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1478.116523][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1478.284444][   T70] ------------[ cut here ]------------
| [ 1478.284770][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1478.285161][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1478.285663][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1478.286692][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1478.287349][   T70] Workqueue: netns cleanup_net
[ 1478.287617][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.287930][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1478.288961][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1478.289371][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1478.289874][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1478.290346][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1478.290817][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bc4a628
[ 1478.291323][   T70] R13: ffff88800bc4adf8 R14: ffffc9000050fc98 R15: ffff88800bc4abc0
[ 1478.291791][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1478.292321][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1478.292740][   T70] CR2: 00007fec87c1e2a8 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1478.293297][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1478.293772][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1478.294297][   T70] Call Trace:
[ 1478.294517][   T70]  <TASK>
[ 1478.294690][ T70] ? __warn (kernel/panic.c:677) 
[ 1478.294995][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1478.295308][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.295620][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1478.295940][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1478.296243][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1478.296520][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1478.296842][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1478.297148][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1478.297452][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1478.297757][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1478.298115][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1478.298401][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1478.298702][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1478.299042][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1478.299330][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1478.299654][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1478.299971][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1478.300326][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1478.300628][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1478.300884][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1478.301144][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1478.301517][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1478.301809][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1478.302093][ T70] kthread (kernel/kthread.c:388) 
[ 1478.302350][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1478.302613][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1478.302904][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1478.303202][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1498.713404][   T70] ------------[ cut here ]------------
| [ 1498.713732][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1498.714106][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1498.714635][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1498.715780][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1498.716487][   T70] Workqueue: netns cleanup_net
[ 1498.716801][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.717113][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1498.718223][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1498.718575][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1498.719065][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1498.719529][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1498.719968][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800949a628
[ 1498.720448][   T70] R13: ffff88800949adf8 R14: ffffc9000050fc98 R15: ffff88800949abc0
[ 1498.720925][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1498.721446][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1498.721801][   T70] CR2: 00007fce1e45e000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1498.722235][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1498.722658][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1498.723086][   T70] Call Trace:
[ 1498.723274][   T70]  <TASK>
[ 1498.723434][ T70] ? __warn (kernel/panic.c:677) 
[ 1498.723657][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1498.723914][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.724202][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1498.724452][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1498.724690][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1498.724945][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1498.725226][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1498.725469][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.725776][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1498.726041][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1498.726386][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1498.726660][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1498.726915][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1498.727226][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1498.727520][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1498.727797][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1498.728066][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1498.728427][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1498.728754][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1498.729023][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1498.729309][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1498.729679][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1498.729979][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1498.730304][ T70] kthread (kernel/kthread.c:388) 
[ 1498.730561][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1498.730816][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1498.731092][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1498.731361][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1498.930427][   T70] ------------[ cut here ]------------
| [ 1498.930736][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1498.931122][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1498.931628][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1498.932727][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1498.933538][   T70] Workqueue: netns cleanup_net
[ 1498.933857][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.934212][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1498.935404][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1498.935818][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1498.936297][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1498.936805][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1498.937299][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800681a628
[ 1498.937807][   T70] R13: ffff88800681adf8 R14: ffffc9000050fc98 R15: ffff88800681abc0
[ 1498.938291][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1498.938855][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1498.939272][   T70] CR2: 000055b1407711d0 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1498.939786][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1498.940214][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1498.940633][   T70] Call Trace:
[ 1498.940811][   T70]  <TASK>
[ 1498.940971][ T70] ? __warn (kernel/panic.c:677) 
[ 1498.941203][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1498.941464][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.941744][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1498.941991][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1498.942232][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1498.942484][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1498.942817][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1498.943094][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1498.943444][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1498.943719][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1498.944068][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1498.944359][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1498.944663][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1498.944982][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1498.945290][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1498.945608][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1498.945908][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1498.946293][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1498.946613][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1498.946916][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1498.947219][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1498.947646][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1498.947989][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1498.948318][ T70] kthread (kernel/kthread.c:388) 
[ 1498.948569][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1498.948872][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1498.949145][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1498.949414][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1499.134775][   T70] ------------[ cut here ]------------
| [ 1499.135106][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1499.135938][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1499.136551][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1499.137744][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1499.138510][   T70] Workqueue: netns cleanup_net
[ 1499.138838][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.139216][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1499.140495][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1499.140885][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1499.141384][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1499.141904][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1499.142384][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800697a628
[ 1499.142913][   T70] R13: ffff88800697adf8 R14: ffffc9000050fc98 R15: ffff88800697abc0
[ 1499.143402][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1499.143959][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1499.144406][   T70] CR2: 00007fffd83bdf90 CR3: 0000000009a6a004 CR4: 00000000001706f0
[ 1499.144926][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1499.145395][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1499.145891][   T70] Call Trace:
[ 1499.146115][   T70]  <TASK>
[ 1499.146295][ T70] ? __warn (kernel/panic.c:677) 
[ 1499.146538][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1499.146838][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.147161][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1499.147438][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1499.147707][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1499.148022][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1499.148352][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1499.148614][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.148894][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1499.149149][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1499.149443][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1499.149687][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1499.149946][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1499.150224][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1499.150475][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1499.150753][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1499.151068][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1499.151491][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1499.151793][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1499.152123][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1499.152461][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1499.152880][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1499.153206][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1499.153588][ T70] kthread (kernel/kthread.c:388) 
[ 1499.153842][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1499.154130][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1499.154464][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1499.154756][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1499.336649][   T70] ------------[ cut here ]------------
| [ 1499.336975][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1499.337361][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1499.337854][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1499.338979][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1499.339693][   T70] Workqueue: netns cleanup_net
[ 1499.339984][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.340355][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1499.341467][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1499.341849][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1499.342312][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1499.342806][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1499.343309][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006472628
[ 1499.343795][   T70] R13: ffff888006472df8 R14: ffffc9000050fc98 R15: ffff888006472bc0
[ 1499.344260][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1499.344791][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1499.345208][   T70] CR2: 00007f01e8279000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1499.345682][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1499.346150][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1499.346646][   T70] Call Trace:
[ 1499.346843][   T70]  <TASK>
[ 1499.347064][ T70] ? __warn (kernel/panic.c:677) 
[ 1499.347327][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1499.347624][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.347956][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1499.348237][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1499.348494][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1499.348748][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1499.349026][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1499.349277][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1499.349557][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1499.349810][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1499.350174][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1499.350449][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1499.350729][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1499.351036][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1499.351357][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1499.351690][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1499.351982][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1499.352354][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1499.352713][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1499.353022][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1499.353330][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1499.353730][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1499.354060][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1499.354386][ T70] kthread (kernel/kthread.c:388) 
[ 1499.354635][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1499.354945][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1499.355254][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1499.355561][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1519.765684][   T70] ------------[ cut here ]------------
| [ 1519.766004][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1519.766414][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1519.766900][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1519.768047][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1519.768792][   T70] Workqueue: netns cleanup_net
[ 1519.769056][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.769376][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1519.770432][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1519.770778][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1519.771203][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1519.771658][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1519.772162][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009b52628
[ 1519.772636][   T70] R13: ffff888009b52df8 R14: ffffc9000050fc98 R15: ffff888009b52bc0
[ 1519.773149][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1519.773690][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1519.774095][   T70] CR2: 000055b1413d503c CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1519.774591][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1519.775076][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1519.775549][   T70] Call Trace:
[ 1519.775740][   T70]  <TASK>
[ 1519.775909][ T70] ? __warn (kernel/panic.c:677) 
[ 1519.776174][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1519.776469][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.776762][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1519.777030][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1519.777313][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1519.777578][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1519.777878][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1519.778150][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.778474][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1519.778742][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1519.779061][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1519.779335][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1519.779634][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1519.779934][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1519.780225][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1519.780528][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1519.780819][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1519.781184][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1519.781514][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1519.781809][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1519.782095][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1519.782457][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1519.782755][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1519.783036][ T70] kthread (kernel/kthread.c:388) 
[ 1519.783262][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1519.783510][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1519.783749][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1519.784020][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1519.963289][   T70] ------------[ cut here ]------------
| [ 1519.963662][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1519.964092][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1519.964635][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1519.965772][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1519.966539][   T70] Workqueue: netns cleanup_net
[ 1519.966837][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.967210][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1519.968251][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1519.968577][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1519.969020][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1519.969460][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1519.969956][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800d912628
[ 1519.970462][   T70] R13: ffff88800d912df8 R14: ffffc9000050fc98 R15: ffff88800d912bc0
[ 1519.970939][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1519.971479][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1519.971871][   T70] CR2: 00007f5a239d0000 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1519.972386][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1519.972851][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1519.973397][   T70] Call Trace:
[ 1519.973588][   T70]  <TASK>
[ 1519.973759][ T70] ? __warn (kernel/panic.c:677) 
[ 1519.974034][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1519.974338][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.974635][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1519.974951][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1519.975217][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1519.975484][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1519.975808][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1519.976089][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1519.976398][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1519.976680][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1519.977041][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1519.977326][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1519.977644][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1519.977972][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1519.978251][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1519.978592][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1519.978900][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1519.979240][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1519.979563][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1519.979880][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1519.980132][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1519.980492][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1519.980770][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1519.981072][ T70] kthread (kernel/kthread.c:388) 
[ 1519.981302][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1519.981551][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1519.981790][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1519.982040][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1520.168807][   T70] ------------[ cut here ]------------
| [ 1520.169140][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1520.169608][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1520.170225][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1520.171400][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1520.172153][   T70] Workqueue: netns cleanup_net
[ 1520.172431][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.172744][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1520.173854][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1520.174259][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1520.174747][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1520.175225][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1520.175711][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800d14a628
[ 1520.176210][   T70] R13: ffff88800d14adf8 R14: ffffc9000050fc98 R15: ffff88800d14abc0
[ 1520.176696][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1520.177179][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1520.177538][   T70] CR2: 00007f5a9e340270 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1520.177958][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1520.178395][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1520.178867][   T70] Call Trace:
[ 1520.179154][   T70]  <TASK>
[ 1520.179374][ T70] ? __warn (kernel/panic.c:677) 
[ 1520.179661][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1520.179975][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.180314][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1520.180615][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1520.180889][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1520.181243][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1520.181557][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1520.181815][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.182142][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1520.182467][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1520.182804][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1520.183109][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1520.183440][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1520.183805][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1520.184116][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1520.184439][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1520.184767][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1520.185175][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1520.185529][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1520.185816][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1520.186106][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1520.186551][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1520.186909][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1520.187234][ T70] kthread (kernel/kthread.c:388) 
[ 1520.187485][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1520.187760][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1520.188073][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1520.188406][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1520.395525][   T70] ------------[ cut here ]------------
| [ 1520.395840][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1520.396236][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1520.396774][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1520.397963][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1520.398710][   T70] Workqueue: netns cleanup_net
[ 1520.399007][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.399385][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1520.400629][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1520.401026][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1520.401568][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1520.402069][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1520.402601][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a4a2628
[ 1520.403153][   T70] R13: ffff88800a4a2df8 R14: ffffc9000050fc98 R15: ffff88800a4a2bc0
[ 1520.403667][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1520.404172][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1520.404546][   T70] CR2: 00007ffafbd91000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1520.404981][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1520.405414][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1520.405841][   T70] Call Trace:
[ 1520.406085][   T70]  <TASK>
[ 1520.406267][ T70] ? __warn (kernel/panic.c:677) 
[ 1520.406523][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1520.406833][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.407147][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1520.407438][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1520.407700][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1520.407994][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1520.408323][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1520.408617][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1520.408912][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1520.409206][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1520.409550][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1520.409812][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1520.410112][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1520.410438][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1520.410711][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1520.411028][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1520.411369][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1520.411713][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1520.412049][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1520.412352][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1520.412640][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1520.413047][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1520.413383][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1520.413723][ T70] kthread (kernel/kthread.c:388) 
[ 1520.414001][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1520.414307][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1520.414599][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1520.414907][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1540.388586][   T70] ------------[ cut here ]------------
| [ 1540.388960][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1540.389412][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1540.390012][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1540.391183][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1540.391950][   T70] Workqueue: netns cleanup_net
[ 1540.392257][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.392574][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1540.393757][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1540.394171][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1540.394640][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1540.395065][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1540.395519][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888007392628
[ 1540.395937][   T70] R13: ffff888007392df8 R14: ffffc9000050fc98 R15: ffff888007392bc0
[ 1540.396450][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1540.396969][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1540.397376][   T70] CR2: 00007fee0d7ae000 CR3: 000000001eb34002 CR4: 00000000001706f0
[ 1540.397857][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1540.398347][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1540.398836][   T70] Call Trace:
[ 1540.399038][   T70]  <TASK>
[ 1540.399219][ T70] ? __warn (kernel/panic.c:677) 
[ 1540.399471][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1540.399793][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.400094][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1540.400394][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1540.400653][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1540.400978][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1540.401300][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1540.401567][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.401891][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1540.402209][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1540.402509][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1540.402802][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.403118][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1540.403431][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.403707][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1540.404015][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1540.404330][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1540.404688][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1540.404985][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1540.405259][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1540.405526][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1540.405877][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.406151][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.406458][ T70] kthread (kernel/kthread.c:388) 
[ 1540.406680][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.406928][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1540.407165][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.407424][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1540.608460][   T70] ------------[ cut here ]------------
| [ 1540.608790][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1540.609238][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1540.609770][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1540.610941][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1540.611691][   T70] Workqueue: netns cleanup_net
[ 1540.612027][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.612386][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1540.613591][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1540.613970][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1540.614434][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1540.614929][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1540.615403][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800984a628
[ 1540.615908][   T70] R13: ffff88800984adf8 R14: ffffc9000050fc98 R15: ffff88800984abc0
[ 1540.616388][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1540.616874][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1540.617232][   T70] CR2: 00007f0b41b96000 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1540.617662][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1540.618085][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1540.618515][   T70] Call Trace:
[ 1540.618697][   T70]  <TASK>
[ 1540.618857][ T70] ? __warn (kernel/panic.c:677) 
[ 1540.619081][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1540.619370][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.619685][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1540.619977][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1540.620259][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1540.620537][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1540.620853][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1540.621137][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.621478][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1540.621761][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1540.622106][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1540.622370][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.622667][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1540.622989][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.623276][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1540.623585][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1540.623905][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1540.624288][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1540.624611][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1540.624908][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1540.625187][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1540.625627][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.625941][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.626282][ T70] kthread (kernel/kthread.c:388) 
[ 1540.626517][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.626796][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1540.627071][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.627378][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1540.821643][   T70] ------------[ cut here ]------------
| [ 1540.821986][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1540.822461][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1540.823012][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1540.824180][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1540.824917][   T70] Workqueue: netns cleanup_net
[ 1540.825206][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.825549][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1540.826591][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1540.826924][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1540.827356][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1540.827802][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1540.828226][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888008552628
[ 1540.828668][   T70] R13: ffff888008552df8 R14: ffffc9000050fc98 R15: ffff888008552bc0
[ 1540.829158][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1540.829693][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1540.830091][   T70] CR2: 00007f0f012ab000 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1540.830574][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1540.831022][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1540.831520][   T70] Call Trace:
[ 1540.831722][   T70]  <TASK>
[ 1540.831885][ T70] ? __warn (kernel/panic.c:677) 
[ 1540.832150][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1540.832464][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.832757][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1540.833046][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1540.833335][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1540.833602][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1540.833891][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1540.834174][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1540.834501][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1540.834799][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1540.835104][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1540.835383][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.835691][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1540.835971][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1540.836263][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1540.836563][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1540.836870][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1540.837235][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1540.837570][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1540.837844][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1540.838094][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1540.838453][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.838727][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1540.839026][ T70] kthread (kernel/kthread.c:388) 
[ 1540.839251][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.839499][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1540.839737][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1540.840008][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1541.047974][   T70] ------------[ cut here ]------------
| [ 1541.048291][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1541.048674][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1541.049167][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1541.050355][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1541.051005][   T70] Workqueue: netns cleanup_net
[ 1541.051280][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1541.051655][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1541.052904][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1541.053257][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1541.053780][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1541.054286][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1541.054768][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800869a628
[ 1541.055296][   T70] R13: ffff88800869adf8 R14: ffffc9000050fc98 R15: ffff88800869abc0
[ 1541.055807][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1541.056371][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1541.056788][   T70] CR2: 000055b141572740 CR3: 0000000020304004 CR4: 00000000001706f0
[ 1541.057312][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1541.057827][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1541.058334][   T70] Call Trace:
[ 1541.058557][   T70]  <TASK>
[ 1541.058748][ T70] ? __warn (kernel/panic.c:677) 
[ 1541.058984][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1541.059294][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1541.059578][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1541.059829][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1541.060066][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1541.060328][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1541.060604][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1541.060845][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1541.061125][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1541.061383][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1541.061744][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1541.062002][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1541.062308][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1541.062663][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1541.062942][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1541.063306][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1541.063626][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1541.064018][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1541.064367][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1541.064640][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1541.064961][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1541.065371][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1541.065693][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1541.066037][ T70] kthread (kernel/kthread.c:388) 
[ 1541.066287][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1541.066589][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1541.066859][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1541.067138][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1588.798582][   T70] ------------[ cut here ]------------
| [ 1588.798893][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1588.799284][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1588.799775][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1588.800929][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1588.801657][   T70] Workqueue: netns cleanup_net
[ 1588.801953][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1588.802319][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1588.803435][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1588.803805][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1588.804287][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1588.804760][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1588.805268][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800dcba628
[ 1588.805751][   T70] R13: ffff88800dcbadf8 R14: ffffc9000050fc98 R15: ffff88800dcbabc0
[ 1588.806225][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1588.806754][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1588.807161][   T70] CR2: 00007fb163fb9000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1588.807650][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1588.808110][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1588.808602][   T70] Call Trace:
[ 1588.808797][   T70]  <TASK>
[ 1588.809004][ T70] ? __warn (kernel/panic.c:677) 
[ 1588.809293][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1588.809596][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1588.809904][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1588.810155][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1588.810402][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1588.810701][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1588.811013][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1588.811307][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1588.811639][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1588.811932][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1588.812273][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1588.812556][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1588.812852][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1588.813120][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1588.813418][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1588.813737][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1588.814045][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1588.814459][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1588.814813][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1588.815107][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1588.815402][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1588.815793][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1588.816105][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1588.816446][ T70] kthread (kernel/kthread.c:388) 
[ 1588.816680][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1588.816967][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1588.817257][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1588.817508][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1589.030403][   T70] ------------[ cut here ]------------
| [ 1589.030746][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1589.031159][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1589.031719][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1589.032863][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1589.033594][   T70] Workqueue: netns cleanup_net
[ 1589.033858][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.034220][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1589.035385][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1589.035710][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1589.036131][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1589.036563][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1589.036990][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880061e2628
[ 1589.037423][   T70] R13: ffff8880061e2df8 R14: ffffc9000050fc98 R15: ffff8880061e2bc0
[ 1589.037846][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1589.038423][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1589.038817][   T70] CR2: 00007ffee1d0d948 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1589.039280][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1589.039724][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1589.040214][   T70] Call Trace:
[ 1589.040412][   T70]  <TASK>
[ 1589.040581][ T70] ? __warn (kernel/panic.c:677) 
[ 1589.040837][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1589.041145][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.041443][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1589.041736][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1589.042004][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1589.042280][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1589.042600][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1589.042888][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.043187][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1589.043446][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1589.043733][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1589.043974][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.044235][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1589.044504][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.044755][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1589.045032][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1589.045331][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1589.045707][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1589.046008][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1589.046297][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1589.046581][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1589.046970][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.047305][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.047607][ T70] kthread (kernel/kthread.c:388) 
[ 1589.047851][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.048127][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1589.048407][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.048685][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1589.232401][   T70] ------------[ cut here ]------------
| [ 1589.232795][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1589.233214][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1589.233732][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1589.234773][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1589.235435][   T70] Workqueue: netns cleanup_net
[ 1589.235704][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.236025][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1589.237065][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1589.237402][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1589.237831][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1589.238321][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1589.238769][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800bcfa628
[ 1589.239308][   T70] R13: ffff88800bcfadf8 R14: ffffc9000050fc98 R15: ffff88800bcfabc0
[ 1589.239806][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1589.240306][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1589.240726][   T70] CR2: 00007f585ff17000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1589.241212][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1589.241688][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1589.242172][   T70] Call Trace:
[ 1589.242385][   T70]  <TASK>
[ 1589.242580][ T70] ? __warn (kernel/panic.c:677) 
[ 1589.242854][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.243185][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1589.243482][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1589.243763][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1589.244042][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1589.244374][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1589.244673][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.244992][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1589.245277][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1589.245623][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1589.245911][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.246218][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1589.246526][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.246825][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1589.247130][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1589.247433][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1589.247821][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1589.248144][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1589.248438][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1589.248728][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1589.249128][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.249429][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.249706][ T70] kthread (kernel/kthread.c:388) 
[ 1589.249934][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.250183][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1589.250436][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.250688][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1589.444332][   T70] ------------[ cut here ]------------
| [ 1589.444682][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1589.445110][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1589.445638][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1589.446672][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1589.447340][   T70] Workqueue: netns cleanup_net
[ 1589.447607][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.447922][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1589.449133][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1589.449500][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1589.449960][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1589.450437][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1589.450898][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880059da628
[ 1589.451328][   T70] R13: ffff8880059dadf8 R14: ffffc9000050fc98 R15: ffff8880059dabc0
[ 1589.451792][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1589.452353][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1589.452747][   T70] CR2: 00007f4348ea4000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1589.453260][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1589.453740][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1589.454245][   T70] Call Trace:
[ 1589.454455][   T70]  <TASK>
[ 1589.454631][ T70] ? __warn (kernel/panic.c:677) 
[ 1589.454899][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1589.455211][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.455525][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1589.455812][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1589.456074][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1589.456379][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1589.456670][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1589.456946][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1589.457282][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1589.457581][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1589.457903][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1589.458178][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.458488][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1589.458769][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1589.459018][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1589.459301][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1589.459570][ T70] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 1589.459895][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1589.460197][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1589.460449][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1589.460730][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1589.461138][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.461459][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1589.461774][ T70] kthread (kernel/kthread.c:388) 
[ 1589.462034][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.462340][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1589.462600][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1589.462892][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1637.277727][   T70] ------------[ cut here ]------------
| [ 1637.278049][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1637.278505][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1637.279044][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1637.280154][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1637.280891][   T70] Workqueue: netns cleanup_net
[ 1637.281155][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.281496][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1637.282657][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1637.283016][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1637.283514][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1637.283963][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1637.284392][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff8880064b2628
[ 1637.284811][   T70] R13: ffff8880064b2df8 R14: ffffc9000050fc98 R15: ffff8880064b2bc0
[ 1637.285237][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1637.285708][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1637.286064][   T70] CR2: 000055b1407220f0 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1637.286516][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1637.287016][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1637.287481][   T70] Call Trace:
[ 1637.287669][   T70]  <TASK>
[ 1637.287863][ T70] ? __warn (kernel/panic.c:677) 
[ 1637.288086][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1637.288357][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.288640][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1637.288892][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1637.289132][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1637.289392][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1637.289668][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1637.289912][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.290199][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1637.290452][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1637.290737][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1637.290976][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.291240][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1637.291507][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.291757][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1637.292035][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1637.292315][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1637.292615][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1637.292869][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1637.293149][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1637.293563][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.293855][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.294162][ T70] kthread (kernel/kthread.c:388) 
[ 1637.294420][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.294686][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1637.294937][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.295225][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1637.491996][   T70] ------------[ cut here ]------------
| [ 1637.492356][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1637.492752][ T70] WARNING: CPU: 1 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1637.493253][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1637.494276][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1637.494930][   T70] Workqueue: netns cleanup_net
[ 1637.495203][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.495517][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1637.496571][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1637.496947][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1637.497405][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1637.497857][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1637.498336][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009df2628
[ 1637.498790][   T70] R13: ffff888009df2df8 R14: ffffc9000050fc98 R15: ffff888009df2bc0
[ 1637.499221][   T70] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[ 1637.499693][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1637.500042][   T70] CR2: 00007f1600d10270 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1637.500467][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1637.500886][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1637.501329][   T70] Call Trace:
[ 1637.501525][   T70]  <TASK>
[ 1637.501701][ T70] ? __warn (kernel/panic.c:677) 
[ 1637.501951][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1637.502233][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.502552][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1637.502797][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1637.503054][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1637.503343][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1637.503651][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1637.503918][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.504243][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1637.504514][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1637.504826][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1637.505093][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.505372][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1637.505667][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.505951][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1637.506255][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1637.506546][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1637.506876][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1637.507151][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1637.507435][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1637.507809][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.508118][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.508445][ T70] kthread (kernel/kthread.c:388) 
[ 1637.508673][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.508942][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1637.509214][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.509461][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1637.684427][   T70] ------------[ cut here ]------------
| [ 1637.684740][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1637.685123][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1637.685648][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1637.686691][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1637.687406][   T70] Workqueue: netns cleanup_net
[ 1637.687671][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.688011][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1637.689171][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1637.689552][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1637.690017][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1637.690453][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1637.690882][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b1ca628
[ 1637.691316][   T70] R13: ffff88800b1cadf8 R14: ffffc9000050fc98 R15: ffff88800b1cabc0
[ 1637.691738][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1637.692232][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1637.692697][   T70] CR2: 000055b14071e5a0 CR3: 000000001eb34005 CR4: 00000000001706f0
[ 1637.693203][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1637.693665][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1637.694131][   T70] Call Trace:
[ 1637.694360][   T70]  <TASK>
[ 1637.694555][ T70] ? __warn (kernel/panic.c:677) 
[ 1637.694788][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1637.695090][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.695420][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1637.695700][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1637.695957][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1637.696263][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1637.696558][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1637.696840][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.697160][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1637.697443][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1637.697747][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1637.698038][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.698318][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1637.698618][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.698900][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1637.699232][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1637.699508][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1637.699826][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1637.700111][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1637.700377][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1637.700738][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.701017][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.701302][ T70] kthread (kernel/kthread.c:388) 
[ 1637.701528][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.701776][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1637.702021][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.702277][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1637.893458][   T70] ------------[ cut here ]------------
| [ 1637.893825][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1637.894217][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1637.894711][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1637.895755][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1637.896460][   T70] Workqueue: netns cleanup_net
[ 1637.896806][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.897161][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1637.898273][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1637.898603][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1637.899105][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1637.899595][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1637.900107][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888009b22628
[ 1637.900577][   T70] R13: ffff888009b22df8 R14: ffffc9000050fc98 R15: ffff888009b22bc0
[ 1637.901059][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1637.901553][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1637.901910][   T70] CR2: 00007fa635ad8000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1637.902348][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1637.902780][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1637.903220][   T70] Call Trace:
[ 1637.903405][   T70]  <TASK>
[ 1637.903566][ T70] ? __warn (kernel/panic.c:677) 
[ 1637.903792][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.904070][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1637.904325][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1637.904561][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1637.904869][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1637.905188][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1637.905469][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1637.905809][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1637.906120][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1637.906495][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1637.906775][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.907049][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1637.907362][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1637.907666][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1637.907984][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1637.908304][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1637.908644][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1637.908927][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1637.909211][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1637.909633][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.909953][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1637.910282][ T70] kthread (kernel/kthread.c:388) 
[ 1637.910527][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.910802][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1637.911057][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1637.911330][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1686.045732][   T70] ------------[ cut here ]------------
| [ 1686.046085][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1686.046479][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1686.046975][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1686.048001][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1686.048705][   T70] Workqueue: netns cleanup_net
[ 1686.049006][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.049380][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1686.050542][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1686.050899][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1686.051402][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1686.051853][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1686.052355][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b592628
[ 1686.052845][   T70] R13: ffff88800b592df8 R14: ffffc9000050fc98 R15: ffff88800b592bc0
[ 1686.053334][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1686.053875][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1686.054265][   T70] CR2: 00007f3faabb7000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1686.054744][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1686.055223][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1686.055692][   T70] Call Trace:
[ 1686.055881][   T70]  <TASK>
[ 1686.056068][ T70] ? __warn (kernel/panic.c:677) 
[ 1686.056336][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1686.056622][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.056921][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1686.057221][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1686.057458][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1686.057710][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1686.057981][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1686.058226][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.058508][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1686.058764][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1686.059074][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1686.059335][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.059622][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1686.059897][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.060214][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1686.060508][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1686.060802][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1686.061128][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1686.061417][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1686.061688][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1686.062104][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.062425][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.062700][ T70] kthread (kernel/kthread.c:388) 
[ 1686.062920][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.063166][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1686.063443][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.063717][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1686.252363][   T70] ------------[ cut here ]------------
| [ 1686.252670][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1686.253046][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1686.253542][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1686.254615][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1686.255363][   T70] Workqueue: netns cleanup_net
[ 1686.255629][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.255987][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1686.257035][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1686.257389][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1686.257889][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1686.258688][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1686.259457][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a752628
[ 1686.260244][   T70] R13: ffff88800a752df8 R14: ffffc9000050fc98 R15: ffff88800a752bc0
[ 1686.260988][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1686.261819][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1686.262461][   T70] CR2: 00007f3faabb7000 CR3: 000000001eb34004 CR4: 00000000001706f0
[ 1686.263236][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1686.263977][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1686.264732][   T70] Call Trace:
[ 1686.265050][   T70]  <TASK>
[ 1686.265349][ T70] ? __warn (kernel/panic.c:677) 
[ 1686.265811][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1686.266337][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.266905][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1686.267403][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1686.267866][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1686.268384][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1686.268930][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1686.269437][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.270028][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1686.270564][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1686.271131][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1686.271627][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.272141][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1686.272696][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.273225][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1686.273725][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1686.274226][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1686.274755][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1686.275216][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1686.275730][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1686.276417][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.276914][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.277421][ T70] kthread (kernel/kthread.c:388) 
[ 1686.277819][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.278298][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1686.278724][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.279165][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1686.449347][   T70] ------------[ cut here ]------------
| [ 1686.449709][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1686.450089][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1686.450588][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1686.451619][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1686.452367][   T70] Workqueue: netns cleanup_net
[ 1686.452696][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.453057][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1686.454216][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1686.454586][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1686.455055][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1686.455543][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1686.456036][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a152628
[ 1686.456523][   T70] R13: ffff88800a152df8 R14: ffffc9000050fc98 R15: ffff88800a152bc0
[ 1686.457010][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1686.457558][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1686.457955][   T70] CR2: 00007fb19e390000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1686.458440][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1686.458932][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1686.459419][   T70] Call Trace:
[ 1686.459650][   T70]  <TASK>
[ 1686.459812][ T70] ? __warn (kernel/panic.c:677) 
[ 1686.460034][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1686.460304][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.460587][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1686.460840][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1686.461077][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1686.461334][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1686.461613][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1686.461876][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.462201][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1686.462500][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1686.462850][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1686.463107][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.463430][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1686.463740][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.464002][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1686.464362][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1686.464657][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1686.464992][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1686.465293][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1686.465589][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1686.465981][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.466298][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.466593][ T70] kthread (kernel/kthread.c:388) 
[ 1686.466840][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.467152][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1686.467412][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.467718][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1686.649400][   T70] ------------[ cut here ]------------
| [ 1686.649709][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1686.650090][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1686.650594][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1686.651657][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1686.652370][   T70] Workqueue: netns cleanup_net
[ 1686.652672][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.653055][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1686.654214][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1686.654595][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1686.655066][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1686.655545][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1686.656030][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800b0aa628
[ 1686.656532][   T70] R13: ffff88800b0aadf8 R14: ffffc9000050fc98 R15: ffff88800b0aabc0
[ 1686.657004][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1686.657575][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1686.657976][   T70] CR2: 00007fb19e390000 CR3: 000000001eb34006 CR4: 00000000001706f0
[ 1686.658473][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1686.658947][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1686.659454][   T70] Call Trace:
[ 1686.659660][   T70]  <TASK>
[ 1686.659841][ T70] ? __warn (kernel/panic.c:677) 
[ 1686.660094][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1686.660402][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.660716][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1686.661014][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1686.661305][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1686.661595][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1686.661868][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1686.662109][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1686.662405][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1686.662658][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1686.662945][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1686.663187][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.663454][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1686.663725][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1686.663977][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1686.664260][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1686.664537][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1686.664822][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1686.665066][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1686.665338][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1686.665727][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.666057][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1686.666386][ T70] kthread (kernel/kthread.c:388) 
[ 1686.666621][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.666915][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1686.667188][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1686.667479][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1734.590482][   T70] ------------[ cut here ]------------
| [ 1734.590822][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1734.591219][ T70] WARNING: CPU: 0 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1734.591787][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1734.592967][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1734.593674][   T70] Workqueue: netns cleanup_net
[ 1734.593994][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.594410][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1734.595498][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1734.595885][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1734.596371][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1734.596863][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1734.597362][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800ad9a628
[ 1734.597845][   T70] R13: ffff88800ad9adf8 R14: ffffc9000050fc98 R15: ffff88800ad9abc0
[ 1734.598313][   T70] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[ 1734.598832][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1734.599231][   T70] CR2: 00007fd6e36db000 CR3: 000000001eb34003 CR4: 00000000001706f0
[ 1734.599693][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1734.600160][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1734.600633][   T70] Call Trace:
[ 1734.600813][   T70]  <TASK>
[ 1734.600973][ T70] ? __warn (kernel/panic.c:677) 
[ 1734.601203][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.601483][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1734.601731][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1734.601976][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1734.602240][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1734.602515][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1734.602761][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.603039][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1734.603392][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1734.603705][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1734.604005][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1734.604273][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1734.604539][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1734.604797][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1734.605084][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1734.605361][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1734.605652][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1734.605904][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1734.606160][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1734.606523][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1734.606798][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1734.607078][ T70] kthread (kernel/kthread.c:388) 
[ 1734.607309][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1734.607560][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1734.607797][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1734.608052][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1734.821006][   T70] ------------[ cut here ]------------
| [ 1734.821332][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1734.821729][ T70] WARNING: CPU: 3 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1734.822353][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1734.823409][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1734.824067][   T70] Workqueue: netns cleanup_net
[ 1734.824338][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.824653][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1734.825704][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1734.826075][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1734.826601][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1734.827096][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1734.827527][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800a812628
[ 1734.828007][   T70] R13: ffff88800a812df8 R14: ffffc9000050fc98 R15: ffff88800a812bc0
[ 1734.828487][   T70] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[ 1734.829027][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1734.829485][   T70] CR2: 00007ffee1d0d948 CR3: 0000000020304001 CR4: 00000000001706f0
[ 1734.829967][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1734.830449][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1734.830936][   T70] Call Trace:
[ 1734.831148][   T70]  <TASK>
[ 1734.831326][ T70] ? __warn (kernel/panic.c:677) 
[ 1734.831576][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1734.831872][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.832224][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1734.832504][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1734.832770][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1734.833069][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1734.833382][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1734.833647][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1734.833967][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1734.834250][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1734.834576][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1734.834852][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1734.835133][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1734.835440][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1734.835711][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1734.836029][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1734.836359][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1734.836652][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1734.836907][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1734.837160][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1734.837522][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1734.837803][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1734.838076][ T70] kthread (kernel/kthread.c:388) 
[ 1734.838372][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1734.838658][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1734.838933][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1734.839240][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1735.028336][   T70] ------------[ cut here ]------------
| [ 1735.028669][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1735.029078][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1735.029629][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1735.030770][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1735.031475][   T70] Workqueue: netns cleanup_net
[ 1735.031742][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.032064][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1735.033107][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1735.033440][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1735.033865][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1735.034337][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1735.034832][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff888006b3a628
[ 1735.035312][   T70] R13: ffff888006b3adf8 R14: ffffc9000050fc98 R15: ffff888006b3abc0
[ 1735.035769][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1735.036276][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1735.036688][   T70] CR2: 00007f8784587000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1735.037145][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1735.037620][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1735.038098][   T70] Call Trace:
[ 1735.038294][   T70]  <TASK>
[ 1735.038469][ T70] ? __warn (kernel/panic.c:677) 
[ 1735.038717][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1735.038994][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.039331][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1735.039600][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1735.039844][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1735.040096][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1735.040374][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1735.040614][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.040896][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1735.041151][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1735.041445][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1735.041686][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1735.041948][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1735.042224][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1735.042476][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1735.042831][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1735.043120][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1735.043446][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1735.043731][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1735.044010][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1735.044407][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1735.044711][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1735.045004][ T70] kthread (kernel/kthread.c:388) 
[ 1735.045245][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1735.045534][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1735.045795][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1735.046066][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [ 1735.235374][   T70] ------------[ cut here ]------------
| [ 1735.235696][   T70] sysfs group 'bridge' not found for kobject 'br0'
| [ 1735.236093][ T70] WARNING: CPU: 2 PID: 70 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [ 1735.236661][   T70] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[ 1735.237745][   T70] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1735.238401][   T70] Workqueue: netns cleanup_net
[ 1735.238664][ T70] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.238976][ T70] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 dc b9 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 dc b9 	mov    $0xffffffffb9dca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[ 1735.240011][   T70] RSP: 0018:ffffc9000050fba0 EFLAGS: 00010282
[ 1735.240348][   T70] RAX: 0000000000000000 RBX: ffffffffba1be220 RCX: ffffffffb711056f
[ 1735.240774][   T70] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 1735.241208][   T70] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a1f19
[ 1735.241740][   T70] R10: ffffc9000050f8cf R11: 205d303754202020 R12: ffff88800d242628
[ 1735.242207][   T70] R13: ffff88800d242df8 R14: ffffc9000050fc98 R15: ffff88800d242bc0
[ 1735.242636][   T70] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[ 1735.243108][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1735.243482][   T70] CR2: 00007f8784587000 CR3: 000000001eb34001 CR4: 00000000001706f0
[ 1735.243957][   T70] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1735.244387][   T70] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1735.244811][   T70] Call Trace:
[ 1735.245015][   T70]  <TASK>
[ 1735.245174][ T70] ? __warn (kernel/panic.c:677) 
[ 1735.245443][ T70] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 1735.245705][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.245988][ T70] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 1735.246245][ T70] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 1735.246482][ T70] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 1735.246740][ T70] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 1735.247015][ T70] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 1735.247268][ T70] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 1735.247548][ T70] br_dev_delete (net/bridge/br_if.c:396) 
[ 1735.247795][ T70] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 1735.248083][ T70] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 1735.248329][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1735.248586][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 1735.248857][ T70] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 1735.249109][ T70] ? process_one_work (kernel/workqueue.c:2609) 
[ 1735.249393][ T70] process_one_work (kernel/workqueue.c:2638) 
[ 1735.249664][ T70] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 1735.249957][ T70] ? assign_work (kernel/workqueue.c:1101) 
[ 1735.250210][ T70] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 1735.250465][ T70] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 1735.250825][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1735.251101][ T70] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 1735.251383][ T70] kthread (kernel/kthread.c:388) 
[ 1735.251603][ T70] ? __pfx_kthread (kernel/kthread.c:341) 
[ 1735.251850][ T70] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 1735.252103][ T70] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
dump_stack_lvl:print_report:kasan_report:kobject_put
refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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