======================================
| [  290.562405][   T69] ==================================================================
| [ 290.562926][ T69] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [  290.563364][   T69] Read of size 1 at addr ffff8880030131fc by task kworker/u8:1/69
| [  290.563854][   T69]
[  290.564448][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.565232][   T69] Workqueue: netns cleanup_net
[  290.565504][   T69] Call Trace:
[  290.565725][   T69]  <TASK>
[ 290.565882][ T69] dump_stack_lvl (lib/dump_stack.c:107) 
[ 290.566168][ T69] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 290.566582][ T69] ? kobject_put (lib/kobject.c:729) 
[ 290.566856][ T69] print_report (mm/kasan/report.c:489) 
[ 290.567152][ T69] ? 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) 
[ 290.567452][ T69] kasan_report (mm/kasan/report.c:603) 
[ 290.567706][ T69] ? kobject_put (lib/kobject.c:729) 
[ 290.567977][ T69] kobject_put (lib/kobject.c:729) 
[ 290.568238][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 290.568502][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.568761][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.569082][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.569360][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 290.569687][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.569964][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.570264][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.570582][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.570880][ T69] ? 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) 
[ 290.571126][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.571416][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.571662][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.571918][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.572267][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.572545][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.572819][ T69] kthread (kernel/kthread.c:388) 
[ 290.573055][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.573341][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.573653][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.573914][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.594236][   T69] ------------[ cut here ]------------
| [  290.594600][   T69] refcount_t: underflow; use-after-free.
| [ 290.594989][ T69] WARNING: CPU: 3 PID: 69 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [  290.595490][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  290.596737][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.597397][   T69] Workqueue: netns cleanup_net
[ 290.597655][ T69] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 290.598081][ T69] 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 a2 ad 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 a2 ad 	mov    $0xffffffffada27a20,%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
[  290.599253][   T69] RSP: 0018:ffffc900004ffb98 EFLAGS: 00010282
[  290.599660][   T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffaad1056f
[  290.600137][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  290.600645][   T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff5200009ff18
[  290.601119][   T69] R10: ffffc900004ff8c7 R11: 205d393654202020 R12: ffff88800622a000
[  290.601643][   T69] R13: ffff88800622adf8 R14: ffffc900004ffc98 R15: ffff88800622abc0
[  290.602108][   T69] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  290.602657][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.603072][   T69] CR2: 000055c148fab0f0 CR3: 0000000036b34001 CR4: 00000000001706f0
[  290.603578][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.604060][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.604556][   T69] Call Trace:
[  290.604735][   T69]  <TASK>
[ 290.604900][ T69] ? __warn (kernel/panic.c:677) 
[ 290.605137][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 290.605439][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 290.605682][ T69] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 290.605930][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 290.606170][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 290.606426][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 290.606699][ T69] ? 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) 
[ 290.606944][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 290.607241][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 290.607551][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 290.607797][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.608044][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.608397][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.608679][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 290.609021][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.609330][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.609649][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.609941][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.610362][ T69] ? 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) 
[ 290.610660][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.611034][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.611318][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.611584][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.612022][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.612334][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.612635][ T69] kthread (kernel/kthread.c:388) 
[ 290.612927][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.613312][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.613579][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.613894][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.617537][   T69] ------------[ cut here ]------------
| [  290.617841][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 290.618227][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.618711][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  290.619965][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.620736][   T69] Workqueue: netns cleanup_net
[ 290.621074][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.621392][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  290.622434][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  290.622761][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  290.623225][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  290.623765][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  290.624269][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800622a628
[  290.624704][   T69] R13: ffff88800622adf8 R14: ffffc900004ffc98 R15: ffff88800622abc0
[  290.625174][   T69] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  290.625744][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.626177][   T69] CR2: 000055c148fab0f0 CR3: 0000000036b34001 CR4: 00000000001706f0
[  290.626710][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.627207][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.627635][   T69] Call Trace:
[  290.627852][   T69]  <TASK>
[ 290.628012][ T69] ? __warn (kernel/panic.c:677) 
[ 290.628264][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 290.628586][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.628914][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 290.629199][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 290.629501][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 290.629755][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 290.630062][ T69] ? 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) 
[ 290.630360][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.630660][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.630990][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.631364][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.631623][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 290.631973][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.632248][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.632549][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.632882][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.633177][ T69] ? 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) 
[ 290.633512][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.633802][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.634056][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.634310][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.634660][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.634934][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.635223][ T69] kthread (kernel/kthread.c:388) 
[ 290.635478][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.635761][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.636033][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.636339][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.639722][   T69] ------------[ cut here ]------------
| [  290.640087][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 290.640495][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.641098][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  290.642387][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.643074][   T69] Workqueue: netns cleanup_net
[ 290.643330][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.643636][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  290.644759][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  290.645132][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  290.645601][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  290.646075][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  290.646560][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888009462628
[  290.647042][   T69] R13: ffff888009462df8 R14: ffffc900004ffc98 R15: ffff888009462bc0
[  290.647488][   T69] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  290.647952][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.648304][   T69] CR2: 000055c148fab0f0 CR3: 0000000036b34001 CR4: 00000000001706f0
[  290.648718][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.649139][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.649556][   T69] Call Trace:
[  290.649773][   T69]  <TASK>
[ 290.649939][ T69] ? __warn (kernel/panic.c:677) 
[ 290.650181][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 290.650468][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.650769][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 290.651015][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 290.651253][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 290.651503][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 290.651775][ T69] ? 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) 
[ 290.652013][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.652294][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.652601][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.652952][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.653269][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 290.653618][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.653948][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.654203][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.654477][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.654738][ T69] ? 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) 
[ 290.654980][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.655273][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.655520][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.655768][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.656120][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.656391][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.656725][ T69] kthread (kernel/kthread.c:388) 
[ 290.657019][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.657281][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.657549][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.657818][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.902475][   T69] ------------[ cut here ]------------
| [  290.902782][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 290.903211][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.903723][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  290.904938][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.905593][   T69] Workqueue: netns cleanup_net
[ 290.905856][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.906176][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  290.907207][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  290.907532][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  290.908003][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  290.908474][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  290.908938][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880086ea628
[  290.909400][   T69] R13: ffff8880086eadf8 R14: ffffc900004ffc98 R15: ffff8880086eabc0
[  290.909818][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  290.910294][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.910644][   T69] CR2: 00007f162016e000 CR3: 0000000036b34001 CR4: 00000000001706f0
[  290.911066][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.911487][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.911905][   T69] Call Trace:
[  290.912139][   T69]  <TASK>
[ 290.912301][ T69] ? __warn (kernel/panic.c:677) 
[ 290.912545][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 290.912844][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.913137][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 290.913386][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 290.913622][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 290.913877][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 290.914154][ T69] ? 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) 
[ 290.914395][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.914669][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.914917][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.915209][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.915462][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.915784][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.916070][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.916383][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.916681][ T69] ? 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) 
[ 290.916956][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.917296][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.917549][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.917858][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.918248][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.918586][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.918899][ T69] kthread (kernel/kthread.c:388) 
[ 290.919131][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.919379][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.919652][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.919932][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.923192][   T69] ------------[ cut here ]------------
| [  290.923524][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 290.923896][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.924398][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  290.925707][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.927120][   T69] Workqueue: netns cleanup_net
[ 290.927423][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.927784][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  290.928804][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  290.929134][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  290.929557][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  290.930005][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  290.930427][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800a9b2628
[  290.930846][   T69] R13: ffff88800a9b2df8 R14: ffffc900004ffc98 R15: ffff88800a9b2bc0
[  290.931267][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  290.931755][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.932176][   T69] CR2: 00007f0375478000 CR3: 0000000036b34006 CR4: 00000000001706f0
[  290.932665][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.933195][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.933654][   T69] Call Trace:
[  290.933922][   T69]  <TASK>
[ 290.934098][ T69] ? __warn (kernel/panic.c:677) 
[ 290.934349][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 290.934657][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.934993][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 290.935283][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 290.935536][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 290.935818][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 290.936121][ T69] ? 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) 
[ 290.936419][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.936729][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 290.937008][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 290.937330][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 290.937613][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 290.937936][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 290.938233][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 290.938533][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 290.938828][ T69] ? 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) 
[ 290.939209][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 290.939537][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 290.939837][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 290.940208][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 290.940627][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.940908][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 290.941189][ T69] kthread (kernel/kthread.c:388) 
[ 290.941407][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.941654][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 290.941917][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 290.942171][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.521204][   T69] ------------[ cut here ]------------
| [  307.521511][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 307.521888][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.522383][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  307.523745][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.524450][   T69] Workqueue: netns cleanup_net
[ 307.524737][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.525101][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  307.526240][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  307.526609][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  307.527068][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.527538][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  307.528173][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880096c2628
[  307.528692][   T69] R13: ffff8880096c2df8 R14: ffffc900004ffc98 R15: ffff8880096c2bc0
[  307.529161][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  307.529721][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.530090][   T69] CR2: 00007fc97e711000 CR3: 0000000036b34003 CR4: 00000000001706f0
[  307.530509][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.530941][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.531365][   T69] Call Trace:
[  307.531543][   T69]  <TASK>
[ 307.531781][ T69] ? __warn (kernel/panic.c:677) 
[ 307.532066][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.532334][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.532666][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.532951][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.533226][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.533506][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.533818][ T69] ? 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) 
[ 307.534086][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.534412][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.534668][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.535017][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.535284][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.535574][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.535903][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.536204][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.536523][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 307.536810][ T69] ? 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) 
[ 307.537090][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.537404][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 307.537676][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.537968][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.538377][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.538683][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.538981][ T69] kthread (kernel/kthread.c:388) 
[ 307.539211][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.539483][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.539768][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.540044][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.543137][   T69] ------------[ cut here ]------------
| [  307.543424][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 307.543784][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.544329][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  307.545671][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.546345][   T69] Workqueue: netns cleanup_net
[ 307.546648][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.546985][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  307.548121][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  307.548475][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  307.548889][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.549462][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  307.549908][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800892a628
[  307.550388][   T69] R13: ffff88800892adf8 R14: ffffc900004ffc98 R15: ffff88800892abc0
[  307.550833][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  307.551361][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.551716][   T69] CR2: 00007fc97e711000 CR3: 0000000036b34003 CR4: 00000000001706f0
[  307.552159][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.552619][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.553092][   T69] Call Trace:
[  307.553269][   T69]  <TASK>
[ 307.553473][ T69] ? __warn (kernel/panic.c:677) 
[ 307.553711][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.553979][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.554287][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.554527][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.554756][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.555033][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.555408][ T69] ? 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) 
[ 307.555667][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.555964][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.556249][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.556548][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.556787][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.557035][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.557306][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.557557][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.557830][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 307.558097][ T69] ? 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) 
[ 307.558340][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.558626][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 307.558872][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.559128][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.559495][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.559802][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.560096][ T69] kthread (kernel/kthread.c:388) 
[ 307.560316][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.560562][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.560797][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.561039][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.801411][   T69] ------------[ cut here ]------------
| [  307.801757][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 307.802186][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.802691][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  307.804100][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.804776][   T69] Workqueue: netns cleanup_net
[ 307.805039][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.805362][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  307.806386][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  307.806712][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  307.807143][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.807575][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  307.808001][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880381a2628
[  307.808425][   T69] R13: ffff8880381a2df8 R14: ffffc900004ffc98 R15: ffff8880381a2bc0
[  307.808843][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  307.809317][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.809668][   T69] CR2: 00007fc97e711000 CR3: 0000000036b34003 CR4: 00000000001706f0
[  307.810101][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.810520][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.810936][   T69] Call Trace:
[  307.811120][   T69]  <TASK>
[ 307.811278][ T69] ? __warn (kernel/panic.c:677) 
[ 307.811563][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.811834][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.812120][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.812366][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.812627][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.812909][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.813203][ T69] ? 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) 
[ 307.813451][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.813752][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.814026][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.814374][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.814614][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.814877][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.815218][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.815492][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 307.815758][ T69] ? 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) 
[ 307.816003][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.816296][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 307.816544][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.816792][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.817145][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.817417][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.817689][ T69] kthread (kernel/kthread.c:388) 
[ 307.817906][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.818163][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.818399][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.818699][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  307.828798][   T69] ------------[ cut here ]------------
| [  307.829199][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 307.829582][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  307.830630][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  307.831910][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  307.832622][   T69] Workqueue: netns cleanup_net
[ 307.832892][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.833270][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  307.834431][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  307.834877][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  307.835355][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  307.835774][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  307.836250][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800ab42628
[  307.836671][   T69] R13: ffff88800ab42df8 R14: ffffc900004ffc98 R15: ffff88800ab42bc0
[  307.837146][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  307.837626][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  307.838029][   T69] CR2: 00005651b1995048 CR3: 0000000036b34004 CR4: 00000000001706f0
[  307.838590][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  307.839156][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  307.839649][   T69] Call Trace:
[  307.839837][   T69]  <TASK>
[ 307.840032][ T69] ? __warn (kernel/panic.c:677) 
[ 307.840449][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 307.840735][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.841166][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 307.841464][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 307.841743][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 307.842115][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 307.842420][ T69] ? 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) 
[ 307.842658][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 307.843005][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 307.843344][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 307.843708][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 307.843958][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 307.844305][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 307.844585][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 307.844865][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 307.845179][ T69] ? 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) 
[ 307.845426][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 307.845714][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 307.845962][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 307.846272][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 307.846659][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.846996][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 307.847350][ T69] kthread (kernel/kthread.c:388) 
[ 307.847595][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.847911][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 307.848239][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 307.848489][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.712472][   T69] ------------[ cut here ]------------
| [  324.712834][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 324.713256][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.713742][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  324.714994][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.715719][   T69] Workqueue: netns cleanup_net
[ 324.716040][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.716374][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  324.717484][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  324.717821][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  324.718245][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  324.718766][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  324.719230][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800915a628
[  324.719709][   T69] R13: ffff88800915adf8 R14: ffffc900004ffc98 R15: ffff88800915abc0
[  324.720199][   T69] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  324.720705][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.721126][   T69] CR2: 00007f626849f000 CR3: 0000000036b34005 CR4: 00000000001706f0
[  324.721628][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.722108][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.722577][   T69] Call Trace:
[  324.722797][   T69]  <TASK>
[ 324.722986][ T69] ? __warn (kernel/panic.c:677) 
[ 324.723228][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 324.723515][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.723849][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 324.724120][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 324.724390][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 324.724677][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 324.724950][ T69] ? 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) 
[ 324.725195][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.725471][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 324.725717][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 324.725999][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 324.726241][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 324.726494][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 324.726761][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 324.727054][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 324.727381][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 324.727671][ T69] ? 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) 
[ 324.727958][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 324.728271][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 324.728589][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 324.728866][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 324.729272][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 324.729576][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 324.729888][ T69] kthread (kernel/kthread.c:388) 
[ 324.730124][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 324.730416][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 324.730682][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 324.730937][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.734256][   T69] ------------[ cut here ]------------
| [  324.734586][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 324.735026][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.735558][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  324.736874][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.737605][   T69] Workqueue: netns cleanup_net
[ 324.737936][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.738264][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  324.739400][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  324.739748][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  324.740172][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  324.740589][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  324.741005][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800a932628
[  324.741436][   T69] R13: ffff88800a932df8 R14: ffffc900004ffc98 R15: ffff88800a932bc0
[  324.741857][   T69] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  324.742410][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.742851][   T69] CR2: 00007f626849f000 CR3: 0000000036b34005 CR4: 00000000001706f0
[  324.743333][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.743808][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.744233][   T69] Call Trace:
[  324.744410][   T69]  <TASK>
[ 324.744569][ T69] ? __warn (kernel/panic.c:677) 
[ 324.744818][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 324.745132][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.745441][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 324.745698][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 324.745961][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 324.746273][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 324.746595][ T69] ? 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) 
[ 324.746852][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.747162][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 324.747447][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 324.747757][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 324.747993][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 324.748253][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 324.748568][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 324.748871][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 324.749172][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 324.749495][ T69] ? 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) 
[ 324.749783][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 324.750101][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 324.750413][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 324.750666][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 324.751017][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 324.751360][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 324.751668][ T69] kthread (kernel/kthread.c:388) 
[ 324.751906][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 324.752200][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 324.752497][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 324.752775][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  325.018182][   T69] ------------[ cut here ]------------
| [  325.018556][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 325.019031][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  325.019569][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  325.020909][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  325.021649][   T69] Workqueue: netns cleanup_net
[ 325.021930][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.022250][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  325.023381][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  325.023727][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  325.024287][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  325.024749][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  325.025317][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880085fa628
[  325.025775][   T69] R13: ffff8880085fadf8 R14: ffffc900004ffc98 R15: ffff8880085fabc0
[  325.026263][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  325.026894][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  325.027286][   T69] CR2: 00007f199807a2a8 CR3: 0000000036b34006 CR4: 00000000001706f0
[  325.027816][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  325.028327][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  325.028796][   T69] Call Trace:
[  325.029058][   T69]  <TASK>
[ 325.029269][ T69] ? __warn (kernel/panic.c:677) 
[ 325.029505][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 325.029824][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.030132][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 325.030491][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 325.030756][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 325.031044][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 325.031348][ T69] ? 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) 
[ 325.031635][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.032013][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 325.032278][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 325.032559][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 325.032826][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 325.033197][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 325.033449][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 325.033741][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 325.034008][ T69] ? 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) 
[ 325.034306][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 325.034638][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 325.034894][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 325.035156][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 325.035517][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.035874][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.036213][ T69] kthread (kernel/kthread.c:388) 
[ 325.036491][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.036766][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 325.037127][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.037374][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  325.040894][   T69] ------------[ cut here ]------------
| [  325.041302][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 325.041737][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  325.042238][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  325.043567][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  325.044335][   T69] Workqueue: netns cleanup_net
[ 325.044641][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.044952][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  325.046153][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  325.046526][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  325.047017][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  325.047473][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  325.047892][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888038432628
[  325.048318][   T69] R13: ffff888038432df8 R14: ffffc900004ffc98 R15: ffff888038432bc0
[  325.048735][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  325.049208][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  325.049563][   T69] CR2: 000055c148ff9dec CR3: 0000000007fa8005 CR4: 00000000001706f0
[  325.049982][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  325.050405][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  325.050827][   T69] Call Trace:
[  325.051004][   T69]  <TASK>
[ 325.051171][ T69] ? __warn (kernel/panic.c:677) 
[ 325.051392][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 325.051673][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.051989][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 325.052285][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 325.052543][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 325.052887][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 325.053190][ T69] ? 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) 
[ 325.053497][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 325.053773][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 325.054031][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 325.054367][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 325.054639][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 325.054935][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 325.055283][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 325.055587][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 325.055896][ T69] ? 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) 
[ 325.056149][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 325.056440][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 325.056689][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 325.056936][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 325.057303][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.057588][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 325.057858][ T69] kthread (kernel/kthread.c:388) 
[ 325.058114][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.058365][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 325.058614][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 325.058857][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  342.253972][   T69] ------------[ cut here ]------------
| [  342.254337][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 342.254767][ T69] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  342.255296][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  342.256643][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  342.257366][   T69] Workqueue: netns cleanup_net
[ 342.257625][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.257940][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  342.259005][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  342.259381][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  342.259840][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  342.260322][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  342.260779][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888006992628
[  342.261230][   T69] R13: ffff888006992df8 R14: ffffc900004ffc98 R15: ffff888006992bc0
[  342.261686][   T69] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  342.262213][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  342.262615][   T69] CR2: 00007f751f802000 CR3: 0000000036b34002 CR4: 00000000001706f0
[  342.263082][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  342.263541][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  342.264014][   T69] Call Trace:
[  342.264208][   T69]  <TASK>
[ 342.264367][ T69] ? __warn (kernel/panic.c:677) 
[ 342.264624][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 342.264882][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.265170][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 342.265419][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 342.265655][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 342.265912][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 342.266194][ T69] ? 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) 
[ 342.266434][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.266715][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 342.266966][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 342.267258][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 342.267496][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.267786][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 342.268061][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.268364][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 342.268653][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 342.268969][ T69] ? 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) 
[ 342.269225][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 342.269553][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 342.269803][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 342.270102][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 342.270563][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.270847][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.271158][ T69] kthread (kernel/kthread.c:388) 
[ 342.271381][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.271669][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 342.271907][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.272192][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  342.275411][   T69] ------------[ cut here ]------------
| [  342.275762][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 342.276165][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  342.276719][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  342.277979][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  342.278662][   T69] Workqueue: netns cleanup_net
[ 342.278955][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.279289][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  342.280311][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  342.280634][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  342.281055][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  342.281480][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  342.281893][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800a23a628
[  342.282318][   T69] R13: ffff88800a23adf8 R14: ffffc900004ffc98 R15: ffff88800a23abc0
[  342.282748][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  342.283268][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  342.283632][   T69] CR2: 00007ffc7a69d558 CR3: 0000000007fa8001 CR4: 00000000001706f0
[  342.284075][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  342.284497][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  342.284920][   T69] Call Trace:
[  342.285106][   T69]  <TASK>
[ 342.285266][ T69] ? __warn (kernel/panic.c:677) 
[ 342.285490][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 342.285744][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.286027][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 342.286282][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 342.286516][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 342.286765][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 342.287032][ T69] ? 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) 
[ 342.287275][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.287589][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 342.287879][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 342.288167][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 342.288424][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.288698][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 342.288985][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.289265][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 342.289567][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 342.289867][ T69] ? 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) 
[ 342.290159][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 342.290464][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 342.290729][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 342.290978][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 342.291335][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.291608][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.291880][ T69] kthread (kernel/kthread.c:388) 
[ 342.292104][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.292351][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 342.292586][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.292846][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  342.520408][   T69] ------------[ cut here ]------------
| [  342.520740][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 342.521190][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  342.521730][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  342.523095][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  342.523765][   T69] Workqueue: netns cleanup_net
[ 342.524030][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.524392][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  342.525530][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  342.525875][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  342.526359][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  342.526831][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  342.527306][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888009cfa628
[  342.527758][   T69] R13: ffff888009cfadf8 R14: ffffc900004ffc98 R15: ffff888009cfabc0
[  342.528178][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  342.528646][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  342.529017][   T69] CR2: 00007ffc7a69d558 CR3: 0000000036b34004 CR4: 00000000001706f0
[  342.529452][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  342.529905][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  342.530328][   T69] Call Trace:
[  342.530504][   T69]  <TASK>
[ 342.530660][ T69] ? __warn (kernel/panic.c:677) 
[ 342.530879][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 342.531143][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.531418][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 342.531661][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 342.531891][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 342.532146][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 342.532416][ T69] ? 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) 
[ 342.532652][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.532939][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 342.533188][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 342.533471][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 342.533707][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 342.533986][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.534262][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 342.534558][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 342.534848][ T69] ? 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) 
[ 342.535119][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 342.535425][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 342.535688][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 342.535964][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 342.536341][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.536629][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.536925][ T69] kthread (kernel/kthread.c:388) 
[ 342.537150][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.537398][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 342.537635][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.537887][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  342.541013][   T69] ------------[ cut here ]------------
| [  342.541309][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 342.541675][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  342.542165][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  342.543461][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  342.544161][   T69] Workqueue: netns cleanup_net
[ 342.544464][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.544800][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  342.545921][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  342.546245][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  342.546667][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  342.547095][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  342.547517][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800afa2628
[  342.547933][   T69] R13: ffff88800afa2df8 R14: ffffc900004ffc98 R15: ffff88800afa2bc0
[  342.548386][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  342.548903][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  342.549277][   T69] CR2: 00007ffc7a69d558 CR3: 0000000036b34004 CR4: 00000000001706f0
[  342.549732][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  342.550187][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  342.550662][   T69] Call Trace:
[  342.550853][   T69]  <TASK>
[ 342.551011][ T69] ? __warn (kernel/panic.c:677) 
[ 342.551263][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 342.551584][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.551873][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 342.552162][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 342.552428][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 342.552708][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 342.553010][ T69] ? 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) 
[ 342.553293][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 342.553600][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 342.553861][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 342.554204][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 342.554476][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 342.554747][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 342.554998][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 342.555282][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 342.555547][ T69] ? 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) 
[ 342.555797][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 342.556093][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 342.556341][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 342.556588][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 342.556960][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.557366][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 342.557666][ T69] kthread (kernel/kthread.c:388) 
[ 342.557929][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.558213][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 342.558488][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 342.558769][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  368.862690][   T69] ------------[ cut here ]------------
| [  368.863028][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 368.863531][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  368.864318][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  368.866220][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  368.867283][   T69] Workqueue: netns cleanup_net
[ 368.867669][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.868138][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  368.869654][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  368.870193][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  368.870871][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  368.871492][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  368.872003][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800a8f2628
[  368.872512][   T69] R13: ffff88800a8f2df8 R14: ffffc900004ffc98 R15: ffff88800a8f2bc0
[  368.872948][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  368.873480][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  368.873881][   T69] CR2: 00007f02af028000 CR3: 0000000036b34004 CR4: 00000000001706f0
[  368.874412][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  368.874875][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  368.875386][   T69] Call Trace:
[  368.875566][   T69]  <TASK>
[ 368.875724][ T69] ? __warn (kernel/panic.c:677) 
[ 368.875971][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 368.876285][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.876597][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 368.876872][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 368.877190][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 368.877458][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 368.877750][ T69] ? 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) 
[ 368.878028][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.878313][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 368.878587][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 368.878941][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 368.879208][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.879496][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 368.879829][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.880152][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 368.880473][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 368.880738][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 368.881027][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 368.881283][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 368.881534][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 368.881952][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.882235][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.882507][ T69] kthread (kernel/kthread.c:388) 
[ 368.882733][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.883004][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 368.883270][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.883516][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  368.886676][   T69] ------------[ cut here ]------------
| [  368.886996][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 368.887416][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  368.887966][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  368.889274][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  368.889975][   T69] Workqueue: netns cleanup_net
[ 368.890243][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.890553][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  368.891579][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  368.891975][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  368.892462][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  368.892969][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  368.893436][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800979a628
[  368.893853][   T69] R13: ffff88800979adf8 R14: ffffc900004ffc98 R15: ffff88800979abc0
[  368.894281][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  368.894749][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  368.895103][   T69] CR2: 00007f02af028000 CR3: 0000000036b34004 CR4: 00000000001706f0
[  368.895519][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  368.895937][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  368.896389][   T69] Call Trace:
[  368.896570][   T69]  <TASK>
[ 368.896730][ T69] ? __warn (kernel/panic.c:677) 
[ 368.896952][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 368.897216][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.897493][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 368.897739][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 368.897973][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 368.898232][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 368.898502][ T69] ? 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) 
[ 368.898741][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.899061][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 368.899377][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 368.899705][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 368.899944][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.900221][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 368.900488][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.900737][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 368.901009][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 368.901284][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 368.901571][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 368.901816][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 368.902076][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 368.902447][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.902778][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.903110][ T69] kthread (kernel/kthread.c:388) 
[ 368.903355][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.903616][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 368.903882][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.904197][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  368.907201][   T69] ------------[ cut here ]------------
| [  368.907490][   T69] sysfs group 'bridge' not found for kobject 'br3'
| [ 368.907906][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  368.908493][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  368.909807][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  368.910624][   T69] Workqueue: netns cleanup_net
[ 368.910920][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.911303][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  368.912464][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  368.912839][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  368.913327][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  368.913816][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  368.914356][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888038172628
[  368.914843][   T69] R13: ffff888038172df8 R14: ffffc900004ffc98 R15: ffff888038172bc0
[  368.915304][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  368.915855][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  368.916220][   T69] CR2: 00007f02af028000 CR3: 0000000036b34004 CR4: 00000000001706f0
[  368.916697][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  368.917149][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  368.917568][   T69] Call Trace:
[  368.917745][   T69]  <TASK>
[ 368.917907][ T69] ? __warn (kernel/panic.c:677) 
[ 368.918136][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 368.918394][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.918706][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 368.918986][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 368.919267][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 368.919546][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 368.919827][ T69] ? 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) 
[ 368.920102][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 368.920419][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 368.920714][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 368.921023][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 368.921302][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.921585][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 368.921878][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 368.922168][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 368.922488][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 368.922801][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 368.923146][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 368.923441][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 368.923725][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 368.924128][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.924433][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 368.924739][ T69] kthread (kernel/kthread.c:388) 
[ 368.924992][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.925261][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 368.925543][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 368.925828][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  369.339219][   T69] ------------[ cut here ]------------
| [  369.339574][   T69] sysfs group 'bridge' not found for kobject 'br1'
| [ 369.339997][ T69] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  369.340497][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  369.341800][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  369.342481][   T69] Workqueue: netns cleanup_net
[ 369.342750][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.343071][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  369.344114][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  369.344470][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  369.344947][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  369.345425][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  369.345870][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff888008882628
[  369.346347][   T69] R13: ffff888008882df8 R14: ffffc900004ffc98 R15: ffff888008882bc0
[  369.346806][   T69] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  369.347338][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  369.347732][   T69] CR2: 00007fdea3fc2000 CR3: 0000000036b34002 CR4: 00000000001706f0
[  369.348157][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  369.348570][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  369.349041][   T69] Call Trace:
[  369.349226][   T69]  <TASK>
[ 369.349383][ T69] ? __warn (kernel/panic.c:677) 
[ 369.349600][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 369.349875][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.350155][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 369.350399][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 369.350629][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 369.350876][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 369.351154][ T69] ? 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) 
[ 369.351397][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.351698][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 369.351947][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 369.352236][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 369.352472][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 369.352779][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 369.353032][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 369.353318][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 369.353582][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 369.353870][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 369.354127][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 369.354378][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 369.354724][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.354994][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.355272][ T69] kthread (kernel/kthread.c:388) 
[ 369.355509][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.355762][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 369.356003][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.356259][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  369.359282][   T69] ------------[ cut here ]------------
| [  369.359657][   T69] sysfs group 'bridge' not found for kobject 'br2'
| [ 369.360035][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  369.360545][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  369.361785][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  369.362522][   T69] Workqueue: netns cleanup_net
[ 369.362826][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.363227][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  369.364296][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  369.364618][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  369.365035][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  369.365461][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  369.365881][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880380d2628
[  369.366308][   T69] R13: ffff8880380d2df8 R14: ffffc900004ffc98 R15: ffff8880380d2bc0
[  369.366726][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  369.367204][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  369.367557][   T69] CR2: 000055c148ff9dec CR3: 0000000007fa8006 CR4: 00000000001706f0
[  369.367983][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  369.368411][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  369.368840][   T69] Call Trace:
[  369.369020][   T69]  <TASK>
[ 369.369189][ T69] ? __warn (kernel/panic.c:677) 
[ 369.369413][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 369.369669][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.369949][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 369.370208][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 369.370538][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 369.370804][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 369.371137][ T69] ? 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) 
[ 369.371399][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.371702][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 369.372010][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 369.372340][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 369.372608][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 369.372941][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 369.373235][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 369.373545][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 369.373850][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 369.374205][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 369.374479][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 369.374785][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 369.375209][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.375498][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.375781][ T69] kthread (kernel/kthread.c:388) 
[ 369.376037][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.376319][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 369.376579][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.376909][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  369.379870][   T69] ------------[ cut here ]------------
| [  369.380176][   T69] sysfs group 'bridge' not found for kobject 'br3'
| [ 369.380552][ T69] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  369.381092][   T69] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  369.382453][   T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  369.383206][   T69] Workqueue: netns cleanup_net
[ 369.383465][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.383775][ T69] 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 9c ad 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 9c ad 	mov    $0xffffffffad9ca7a0,%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
[  369.384797][   T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282
[  369.385123][   T69] RAX: 0000000000000000 RBX: ffffffffaddbe220 RCX: ffffffffaad1056f
[  369.385605][   T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  369.386120][   T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19
[  369.386616][   T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff88800c002628
[  369.387080][   T69] R13: ffff88800c002df8 R14: ffffc900004ffc98 R15: ffff88800c002bc0
[  369.387566][   T69] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  369.388130][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  369.388522][   T69] CR2: 000055c148ff9dec CR3: 0000000036b34005 CR4: 00000000001706f0
[  369.389016][   T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  369.389502][   T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  369.389984][   T69] Call Trace:
[  369.390179][   T69]  <TASK>
[ 369.390372][ T69] ? __warn (kernel/panic.c:677) 
[ 369.390654][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 369.390924][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.391258][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 369.391530][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 369.391821][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 369.392106][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 369.392420][ T69] ? 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) 
[ 369.392726][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.393083][ T69] br_dev_delete (net/bridge/br_if.c:396) 
[ 369.393333][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 369.393612][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 369.393857][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 369.394127][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 369.394381][ T69] ? process_one_work (kernel/workqueue.c:2609) 
[ 369.394659][ T69] process_one_work (kernel/workqueue.c:2638) 
[ 369.394923][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 369.395221][ T69] ? assign_work (kernel/workqueue.c:1101) 
[ 369.395469][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 369.395737][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 369.396147][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.396459][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.396776][ T69] kthread (kernel/kthread.c:388) 
[ 369.397034][ T69] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.397307][ T69] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 369.397594][ T69] ? __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
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
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
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
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
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
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
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
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
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
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