======================================
| [   42.840267][   T11] ==================================================================
| [ 42.840713][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [   42.841123][   T11] Read of size 1 at addr ffff88800861207c by task kworker/u8:0/11
| [   42.841538][   T11]
[   42.842117][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.842790][   T11] Workqueue: netns cleanup_net
[   42.843050][   T11] Call Trace:
[   42.843237][   T11]  <TASK>
[ 42.843395][ T11] dump_stack_lvl (lib/dump_stack.c:107) 
[ 42.843642][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 42.844018][ T11] ? kobject_put (lib/kobject.c:729) 
[ 42.844270][ T11] print_report (mm/kasan/report.c:489) 
[ 42.844510][ T11] ? 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) 
[ 42.844793][ T11] kasan_report (mm/kasan/report.c:603) 
[ 42.845026][ T11] ? kobject_put (lib/kobject.c:729) 
[ 42.845265][ T11] kobject_put (lib/kobject.c:729) 
[ 42.845496][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 42.845737][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 42.845989][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 42.846274][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 42.846510][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 42.846836][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 42.847103][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 42.847371][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 42.847650][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 42.847928][ T11] ? 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) 
[ 42.848185][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 42.848480][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 42.848745][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 42.849001][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 42.849294][ T11] kthread (kernel/kthread.c:388) 
[ 42.849525][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.849782][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 42.850040][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.850339][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.869914][   T11] ------------[ cut here ]------------
| [   42.870204][   T11] refcount_t: underflow; use-after-free.
| [ 42.870537][ T11] WARNING: CPU: 3 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [   42.871209][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.872141][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.872847][   T11] Workqueue: netns cleanup_net
[ 42.873110][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 42.873495][ T11] 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 8c 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 8c 	mov    $0xffffffff8ca27a20,%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
[   42.874618][   T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282
[   42.874987][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff89d1056f
[   42.875460][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   42.875944][   T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18
[   42.876413][   T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff888009d0a000
[   42.876879][   T11] R13: ffff888009d0adf8 R14: ffffc900000bfc98 R15: ffff888009d0abc0
[   42.877359][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   42.877852][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.878254][   T11] CR2: 00007fe9a5197000 CR3: 000000001a534004 CR4: 00000000001706f0
[   42.878709][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.879157][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.879573][   T11] Call Trace:
[   42.879749][   T11]  <TASK>
[ 42.879913][ T11] ? __warn (kernel/panic.c:677) 
[ 42.880135][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 42.880429][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 42.880675][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 42.880937][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 42.881169][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 42.881471][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 42.881757][ T11] ? 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) 
[ 42.882053][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 42.882369][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 42.882686][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 42.882986][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 42.883244][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 42.883580][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 42.883845][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 42.884186][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 42.884476][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 42.884756][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 42.885061][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 42.885355][ T11] ? 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) 
[ 42.885610][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 42.885951][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 42.886229][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 42.886513][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 42.886803][ T11] kthread (kernel/kthread.c:388) 
[ 42.887048][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.887342][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 42.887594][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.887874][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.891007][   T11] ------------[ cut here ]------------
| [   42.891295][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 42.891669][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.892207][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.893164][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.893815][   T11] Workqueue: netns cleanup_net
[ 42.894104][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.894437][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   42.895584][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   42.895944][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   42.896387][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   42.896847][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   42.897328][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009d0a628
[   42.897799][   T11] R13: ffff888009d0adf8 R14: ffffc900000bfc98 R15: ffff888009d0abc0
[   42.898263][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   42.898771][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.899142][   T11] CR2: 00007fe9a5197000 CR3: 000000001a534004 CR4: 00000000001706f0
[   42.899609][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.900168][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.900631][   T11] Call Trace:
[   42.900809][   T11]  <TASK>
[ 42.901046][ T11] ? __warn (kernel/panic.c:677) 
[ 42.901283][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 42.901568][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.901868][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 42.902243][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 42.902490][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 42.902754][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 42.903043][ T11] ? 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) 
[ 42.903292][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.903621][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 42.903870][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 42.904162][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 42.904424][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 42.904759][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 42.905033][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 42.905284][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 42.905559][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 42.905825][ T11] ? 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) 
[ 42.906080][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 42.906369][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 42.906616][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 42.906892][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 42.907182][ T11] kthread (kernel/kthread.c:388) 
[ 42.907423][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.907746][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 42.908006][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.908267][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.911551][   T11] ------------[ cut here ]------------
| [   42.911842][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 42.912231][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.912744][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.914067][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.914769][   T11] Workqueue: netns cleanup_net
[ 42.915051][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.915383][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   42.916492][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   42.916837][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   42.917286][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   42.917756][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   42.918179][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009dca628
[   42.918596][   T11] R13: ffff888009dcadf8 R14: ffffc900000bfc98 R15: ffff888009dcabc0
[   42.919016][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   42.919484][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.919831][   T11] CR2: 00007fe9a5197000 CR3: 000000001a534004 CR4: 00000000001706f0
[   42.920257][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.920698][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.921144][   T11] Call Trace:
[   42.921321][   T11]  <TASK>
[ 42.921481][ T11] ? __warn (kernel/panic.c:677) 
[ 42.921700][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 42.922032][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.922312][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 42.922560][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 42.922791][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 42.923048][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 42.923340][ T11] ? 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) 
[ 42.923593][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.923908][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 42.924182][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 42.924493][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 42.924749][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 42.925075][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 42.925342][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 42.925591][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 42.925864][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 42.926134][ T11] ? 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) 
[ 42.926376][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 42.926661][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 42.926910][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 42.927169][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 42.927441][ T11] kthread (kernel/kthread.c:388) 
[ 42.927659][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.927914][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 42.928152][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 42.928399][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   43.151340][   T11] ------------[ cut here ]------------
| [   43.151642][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 43.152028][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   43.152513][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   43.153384][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.154056][   T11] Workqueue: netns cleanup_net
[ 43.154332][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.154705][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   43.155826][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   43.156181][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   43.156651][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   43.157117][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   43.157574][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009c02628
[   43.158047][   T11] R13: ffff888009c02df8 R14: ffffc900000bfc98 R15: ffff888009c02bc0
[   43.158482][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   43.159023][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.159398][   T11] CR2: 00007f9e3039e270 CR3: 000000001a534004 CR4: 00000000001706f0
[   43.159840][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.160263][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.160683][   T11] Call Trace:
[   43.160866][   T11]  <TASK>
[ 43.161033][ T11] ? __warn (kernel/panic.c:677) 
[ 43.161258][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 43.161514][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.161818][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 43.162107][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 43.162371][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 43.162655][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 43.162955][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 43.163220][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.163520][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.163821][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.164135][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.164410][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.164702][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.164982][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.165291][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 43.165604][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.165867][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.166197][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 43.166469][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.166730][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.167037][ T11] kthread (kernel/kthread.c:388) 
[ 43.167305][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.167565][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.167829][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.168124][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   43.171327][   T11] ------------[ cut here ]------------
| [   43.171614][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 43.171996][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   43.172476][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   43.173330][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.173972][   T11] Workqueue: netns cleanup_net
[ 43.174228][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.174561][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[   43.175648][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   43.176029][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   43.176483][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   43.176969][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   43.177443][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009d82628
[   43.177862][   T11] R13: ffff888009d82df8 R14: ffffc900000bfc98 R15: ffff888009d82bc0
[   43.178343][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   43.178866][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.179275][   T11] CR2: 00007f9e3039e270 CR3: 000000001a534004 CR4: 00000000001706f0
[   43.179739][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.180197][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.180635][   T11] Call Trace:
[   43.180844][   T11]  <TASK>
[ 43.181037][ T11] ? __warn (kernel/panic.c:677) 
[ 43.181288][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 43.181569][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.181908][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 43.182190][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 43.182456][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 43.182710][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 43.182990][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 43.183286][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 43.183592][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 43.183876][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 43.184211][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 43.184470][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 43.184759][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 43.185052][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 43.185360][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 43.185642][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 43.185887][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 43.186182][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 43.186482][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 43.186757][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 43.187047][ T11] kthread (kernel/kthread.c:388) 
[ 43.187286][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.187550][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 43.187791][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 43.188045][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   60.764017][   T11] ------------[ cut here ]------------
| [   60.764355][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 60.764787][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   60.765329][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   60.766271][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   60.766963][   T11] Workqueue: netns cleanup_net
[ 60.767224][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.767536][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   60.768700][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   60.769056][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   60.769517][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   60.769981][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   60.770443][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a352628
[   60.770911][   T11] R13: ffff88800a352df8 R14: ffffc900000bfc98 R15: ffff88800a352bc0
[   60.771365][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   60.771907][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.772253][   T11] CR2: 00007fc1870bd000 CR3: 000000001a534002 CR4: 00000000001706f0
[   60.772671][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.773091][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.773506][   T11] Call Trace:
[   60.773680][   T11]  <TASK>
[ 60.773836][ T11] ? __warn (kernel/panic.c:677) 
[ 60.774096][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 60.774369][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.774713][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 60.774990][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 60.775234][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 60.775549][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 60.775880][ T11] ? 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) 
[ 60.776162][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.776507][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 60.776772][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 60.777125][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 60.777394][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 60.777695][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 60.778002][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 60.778279][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 60.778618][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 60.778920][ T11] ? 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) 
[ 60.779190][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 60.779507][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 60.779824][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 60.780089][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 60.780421][ T11] kthread (kernel/kthread.c:388) 
[ 60.780671][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 60.780956][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 60.781209][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 60.781470][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   60.784659][   T11] ------------[ cut here ]------------
| [   60.784991][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 60.785362][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   60.785858][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   60.786720][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   60.787367][   T11] Workqueue: netns cleanup_net
[ 60.787624][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.787970][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   60.789088][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   60.789444][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   60.789893][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   60.790373][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   60.790818][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888006362628
[   60.791239][   T11] R13: ffff888006362df8 R14: ffffc900000bfc98 R15: ffff888006362bc0
[   60.791666][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   60.792154][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.792503][   T11] CR2: 00007fc1870bd000 CR3: 000000001a534002 CR4: 00000000001706f0
[   60.792946][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.793385][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.793823][   T11] Call Trace:
[   60.794005][   T11]  <TASK>
[ 60.794216][ T11] ? __warn (kernel/panic.c:677) 
[ 60.794439][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 60.794705][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.794985][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 60.795228][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 60.795459][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 60.795743][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 60.796015][ T11] ? 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) 
[ 60.796254][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 60.796533][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 60.796815][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 60.797179][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 60.797420][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 60.797670][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 60.797939][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 60.798192][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 60.798518][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 60.798821][ T11] ? 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) 
[ 60.799074][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 60.799377][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 60.799624][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 60.800008][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 60.800281][ T11] kthread (kernel/kthread.c:388) 
[ 60.800530][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 60.800853][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 60.801099][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 60.801365][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   61.044216][   T11] ------------[ cut here ]------------
| [   61.044594][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 61.044999][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   61.045509][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   61.046484][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   61.047233][   T11] Workqueue: netns cleanup_net
[ 61.047495][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.047824][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   61.048912][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   61.049443][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   61.050115][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   61.050732][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   61.051364][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888007302628
[   61.051995][   T11] R13: ffff888007302df8 R14: ffffc900000bfc98 R15: ffff888007302bc0
[   61.052623][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   61.053366][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   61.053885][   T11] CR2: 00007efd2ac8a000 CR3: 000000001a534004 CR4: 00000000001706f0
[   61.054534][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   61.055186][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   61.055860][   T11] Call Trace:
[   61.056161][   T11]  <TASK>
[ 61.056429][ T11] ? __warn (kernel/panic.c:677) 
[ 61.056779][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 61.057192][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.057651][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 61.058052][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 61.058414][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 61.058810][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 61.059251][ T11] ? 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) 
[ 61.059611][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.060045][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 61.060422][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 61.060866][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 61.061287][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 61.061739][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 61.062170][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 61.062621][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 61.063038][ T11] ? 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) 
[ 61.063403][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 61.063834][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 61.064222][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 61.064621][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 61.065080][ T11] kthread (kernel/kthread.c:388) 
[ 61.065458][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 61.065854][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 61.066267][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 61.066684][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   61.071409][   T11] ------------[ cut here ]------------
| [   61.071876][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 61.072522][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   61.073927][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   61.075407][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   61.076464][   T11] Workqueue: netns cleanup_net
[ 61.076852][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.077326][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   61.078972][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   61.079512][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   61.080241][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   61.080982][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   61.081702][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a38a628
[   61.082431][   T11] R13: ffff88800a38adf8 R14: ffffc900000bfc98 R15: ffff88800a38abc0
[   61.083169][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   61.083969][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   61.084562][   T11] CR2: 00007efd2ac8a000 CR3: 000000001a534004 CR4: 00000000001706f0
[   61.085302][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   61.086036][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   61.086749][   T11] Call Trace:
[   61.087030][   T11]  <TASK>
[ 61.087265][ T11] ? __warn (kernel/panic.c:677) 
[ 61.087594][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 61.087991][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.088410][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 61.088780][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 61.089138][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 61.089514][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 61.089926][ T11] ? 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) 
[ 61.090283][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 61.090746][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 61.091193][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 61.091662][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 61.092113][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 61.092581][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 61.093009][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 61.093497][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 61.093947][ T11] ? 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) 
[ 61.094311][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 61.094772][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 61.095183][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 61.095597][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 61.096054][ T11] kthread (kernel/kthread.c:388) 
[ 61.096397][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 61.096800][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 61.097170][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 61.097562][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   79.388874][   T11] ------------[ cut here ]------------
| [   79.389345][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 79.389921][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   79.390628][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   79.392033][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   79.392995][   T11] Workqueue: netns cleanup_net
[ 79.393436][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.393975][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   79.395693][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   79.396242][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   79.396973][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   79.397687][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   79.398416][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009e62628
[   79.399116][   T11] R13: ffff888009e62df8 R14: ffffc900000bfc98 R15: ffff888009e62bc0
[   79.399810][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   79.400595][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.401152][   T11] CR2: 00005561e11b90f0 CR3: 000000001a534005 CR4: 00000000001706f0
[   79.401782][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.402411][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.403095][   T11] Call Trace:
[   79.403381][   T11]  <TASK>
[ 79.403655][ T11] ? __warn (kernel/panic.c:677) 
[ 79.404078][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.404552][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.405002][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 79.405391][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 79.405827][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 79.406285][ T11] ? 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) 
[ 79.406723][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.407192][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 79.407629][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 79.408112][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 79.408543][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.408963][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 79.409447][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.409841][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 79.410294][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 79.410692][ T11] ? 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) 
[ 79.411111][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 79.411596][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 79.412030][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 79.412493][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 79.412958][ T11] kthread (kernel/kthread.c:388) 
[ 79.413287][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.413666][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 79.414086][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.414498][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   79.419213][   T11] ------------[ cut here ]------------
| [   79.419717][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 79.420307][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   79.421073][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   79.422469][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   79.423542][   T11] Workqueue: netns cleanup_net
[ 79.424003][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.424504][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   79.426254][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   79.426782][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   79.427464][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   79.428204][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   79.428892][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009752628
[   79.429597][   T11] R13: ffff888009752df8 R14: ffffc900000bfc98 R15: ffff888009752bc0
[   79.430276][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   79.430991][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.431546][   T11] CR2: 00005561e11b90f0 CR3: 000000001a534005 CR4: 00000000001706f0
[   79.432187][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.432844][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.433477][   T11] Call Trace:
[   79.433749][   T11]  <TASK>
[ 79.433997][ T11] ? __warn (kernel/panic.c:677) 
[ 79.434378][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 79.434811][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.435271][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.435677][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 79.436071][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 79.436470][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 79.436934][ T11] ? 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) 
[ 79.437327][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.437778][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 79.438351][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 79.438811][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 79.439432][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.439806][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 79.440207][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.440587][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 79.441013][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 79.441482][ T11] ? 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) 
[ 79.441863][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 79.442370][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 79.442781][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 79.443197][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 79.443605][ T11] kthread (kernel/kthread.c:388) 
[ 79.443939][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.444300][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 79.444658][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.445044][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   79.697333][   T11] ------------[ cut here ]------------
| [   79.697691][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 79.698076][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   79.698653][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   79.699645][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   79.700387][   T11] Workqueue: netns cleanup_net
[ 79.700650][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.700964][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   79.701993][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   79.702321][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   79.702741][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   79.703167][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   79.703586][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880099e2628
[   79.704015][   T11] R13: ffff8880099e2df8 R14: ffffc900000bfc98 R15: ffff8880099e2bc0
[   79.704502][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   79.705075][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.705492][   T11] CR2: 00007f4b7f7bf270 CR3: 000000001a534003 CR4: 00000000001706f0
[   79.705992][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.706463][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.706970][   T11] Call Trace:
[   79.707150][   T11]  <TASK>
[ 79.707308][ T11] ? __warn (kernel/panic.c:677) 
[ 79.707527][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 79.707812][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.708154][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.708414][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 79.708685][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 79.709036][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 79.709342][ T11] ? 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) 
[ 79.709608][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.709944][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 79.710194][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 79.710511][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 79.710794][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 79.711085][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.711374][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 79.711709][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 79.712010][ T11] ? 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) 
[ 79.712285][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 79.712621][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 79.712867][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 79.713129][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 79.713404][ T11] kthread (kernel/kthread.c:388) 
[ 79.713620][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.713867][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 79.714143][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.714390][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   79.717411][   T11] ------------[ cut here ]------------
| [   79.717741][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 79.718135][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   79.718621][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   79.719785][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   79.720471][   T11] Workqueue: netns cleanup_net
[ 79.720763][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.721137][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   79.722740][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   79.723075][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   79.723500][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   79.723922][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   79.724338][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a7ba628
[   79.724766][   T11] R13: ffff88800a7badf8 R14: ffffc900000bfc98 R15: ffff88800a7babc0
[   79.725201][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[   79.725718][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.726134][   T11] CR2: 00007f4b7f7bf270 CR3: 000000001a534003 CR4: 00000000001706f0
[   79.726605][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.727031][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.727449][   T11] Call Trace:
[   79.727626][   T11]  <TASK>
[ 79.727783][ T11] ? __warn (kernel/panic.c:677) 
[ 79.728013][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 79.728277][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.728556][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.728801][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 79.729040][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 79.729291][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 79.729606][ T11] ? 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) 
[ 79.729848][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 79.730162][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 79.730446][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 79.730756][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 79.731010][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 79.731278][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 79.731530][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 79.731804][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 79.732078][ T11] ? 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) 
[ 79.732323][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 79.732609][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 79.732939][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 79.733236][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 79.733572][ T11] kthread (kernel/kthread.c:388) 
[ 79.733824][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.734092][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 79.734387][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 79.734696][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   97.519331][   T11] ------------[ cut here ]------------
| [   97.519648][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 97.520047][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   97.520580][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   97.521531][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   97.522185][   T11] Workqueue: netns cleanup_net
[ 97.522448][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.522757][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   97.523779][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   97.524190][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   97.524650][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   97.525131][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   97.525626][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880087b2628
[   97.526119][   T11] R13: ffff8880087b2df8 R14: ffffc900000bfc98 R15: ffff8880087b2bc0
[   97.526699][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   97.527253][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   97.527605][   T11] CR2: 00007fb9333f3270 CR3: 000000001a534002 CR4: 00000000001706f0
[   97.528043][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   97.528479][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   97.528916][   T11] Call Trace:
[   97.529103][   T11]  <TASK>
[ 97.529264][ T11] ? __warn (kernel/panic.c:677) 
[ 97.529541][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 97.529893][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.530255][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 97.530569][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 97.530865][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 97.531120][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 97.531435][ T11] ? 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) 
[ 97.531754][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.532083][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 97.532407][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 97.532738][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 97.533044][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.533382][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 97.533710][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.533982][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 97.534262][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 97.534536][ T11] ? 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) 
[ 97.534791][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 97.535096][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 97.535343][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 97.535623][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 97.535973][ T11] kthread (kernel/kthread.c:388) 
[ 97.536250][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.536544][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 97.536836][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.537151][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   97.540831][   T11] ------------[ cut here ]------------
| [   97.541203][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 97.541625][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   97.542216][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   97.543338][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   97.544121][   T11] Workqueue: netns cleanup_net
[ 97.544427][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.544817][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   97.545834][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   97.546161][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   97.546577][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   97.547127][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   97.547650][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880080fa628
[   97.548265][   T11] R13: ffff8880080fadf8 R14: ffffc900000bfc98 R15: ffff8880080fabc0
[   97.548857][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[   97.549445][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   97.549841][   T11] CR2: 00007fb9333f3270 CR3: 000000001a534002 CR4: 00000000001706f0
[   97.550358][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   97.550890][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   97.551513][   T11] Call Trace:
[   97.551719][   T11]  <TASK>
[ 97.551960][ T11] ? __warn (kernel/panic.c:677) 
[ 97.552193][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 97.552452][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.552779][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 97.553099][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 97.553353][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 97.553681][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 97.554018][ T11] ? 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) 
[ 97.554367][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.554674][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 97.555001][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 97.555285][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 97.555530][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.555843][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 97.556175][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.556508][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 97.556862][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 97.557181][ T11] ? 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) 
[ 97.557536][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 97.557871][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 97.558157][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 97.558498][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 97.558772][ T11] kthread (kernel/kthread.c:388) 
[ 97.559038][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.559330][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 97.559600][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.559849][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   97.771271][   T11] ------------[ cut here ]------------
| [   97.771592][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 97.771986][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   97.772474][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   97.773437][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   97.774090][   T11] Workqueue: netns cleanup_net
[ 97.774380][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.774691][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   97.775773][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   97.776171][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   97.776658][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   97.777138][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   97.777617][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888008772628
[   97.778087][   T11] R13: ffff888008772df8 R14: ffffc900000bfc98 R15: ffff888008772bc0
[   97.778599][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   97.779104][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   97.779451][   T11] CR2: 00007f31894107f0 CR3: 000000001a534004 CR4: 00000000001706f0
[   97.779889][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   97.780316][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   97.780743][   T11] Call Trace:
[   97.780929][   T11]  <TASK>
[ 97.781103][ T11] ? __warn (kernel/panic.c:677) 
[ 97.781385][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 97.781683][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.782005][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 97.782322][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 97.782553][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 97.782811][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 97.783155][ T11] ? 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) 
[ 97.783422][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.783749][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 97.784047][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 97.784388][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 97.784628][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 97.784896][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.785185][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 97.785458][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 97.785724][ T11] ? 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) 
[ 97.785971][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 97.786263][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 97.786518][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 97.786774][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 97.787051][ T11] kthread (kernel/kthread.c:388) 
[ 97.787270][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.787519][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 97.787754][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.788008][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   97.796998][   T11] ------------[ cut here ]------------
| [   97.797313][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 97.797775][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   97.798706][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   97.799626][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   97.800326][   T11] Workqueue: netns cleanup_net
[ 97.800595][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.800972][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[   97.802048][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[   97.802381][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[   97.802801][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[   97.803267][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[   97.803691][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800aa5a628
[   97.804160][   T11] R13: ffff88800aa5adf8 R14: ffffc900000bfc98 R15: ffff88800aa5abc0
[   97.804592][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[   97.805115][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   97.805489][   T11] CR2: 0000562619143048 CR3: 000000001a534004 CR4: 00000000001706f0
[   97.806061][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   97.806593][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   97.807158][   T11] Call Trace:
[   97.807381][   T11]  <TASK>
[ 97.807582][ T11] ? __warn (kernel/panic.c:677) 
[ 97.807802][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 97.808103][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.808385][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 97.808633][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 97.808875][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 97.809178][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 97.809457][ T11] ? 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) 
[ 97.809697][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 97.810021][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 97.810274][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 97.810558][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 97.810796][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 97.811108][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 97.811407][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 97.811745][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 97.812027][ T11] ? 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) 
[ 97.812343][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 97.812665][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 97.812951][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 97.813272][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 97.813564][ T11] kthread (kernel/kthread.c:388) 
[ 97.813855][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.814178][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 97.814448][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 97.814743][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.569579][   T11] ------------[ cut here ]------------
| [  123.569894][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 123.570771][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.571357][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.572413][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.573155][   T11] Workqueue: netns cleanup_net
[ 123.573540][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.573970][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  123.575088][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  123.575411][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  123.575828][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  123.576369][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  123.576864][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800aea2628
[  123.577331][   T11] R13: ffff88800aea2df8 R14: ffffc900000bfc98 R15: ffff88800aea2bc0
[  123.577752][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  123.578278][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.578725][   T11] CR2: 000000000049cf40 CR3: 000000001a534005 CR4: 00000000001706f0
[  123.579189][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.579635][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.580108][   T11] Call Trace:
[  123.580331][   T11]  <TASK>
[ 123.580524][ T11] ? __warn (kernel/panic.c:677) 
[ 123.580776][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 123.581068][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.581377][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 123.581654][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 123.581888][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 123.582144][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 123.582413][ T11] ? 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) 
[ 123.582649][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.582935][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 123.583187][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 123.583468][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 123.583709][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.584001][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 123.584278][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.584576][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 123.584924][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 123.585191][ T11] ? 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) 
[ 123.585471][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 123.585761][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 123.586013][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 123.586268][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 123.586542][ T11] kthread (kernel/kthread.c:388) 
[ 123.586761][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.587020][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 123.587258][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.587545][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.590808][   T11] ------------[ cut here ]------------
| [  123.591145][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 123.591554][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.592406][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.593269][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.593963][   T11] Workqueue: netns cleanup_net
[ 123.594291][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.594633][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  123.595683][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  123.596057][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  123.596475][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  123.596935][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  123.597395][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880063fa628
[  123.597850][   T11] R13: ffff8880063fadf8 R14: ffffc900000bfc98 R15: ffff8880063fabc0
[  123.598300][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  123.598811][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.599204][   T11] CR2: 000000000049cf40 CR3: 000000001a534005 CR4: 00000000001706f0
[  123.599657][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.600105][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.600560][   T11] Call Trace:
[  123.600776][   T11]  <TASK>
[ 123.600969][ T11] ? __warn (kernel/panic.c:677) 
[ 123.601214][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 123.601509][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.601831][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 123.602117][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 123.602373][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 123.602661][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 123.602973][ T11] ? 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) 
[ 123.603243][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.603542][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 123.603827][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 123.604152][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 123.604439][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.604709][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 123.605013][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.605306][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 123.605613][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 123.605916][ T11] ? 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) 
[ 123.606196][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 123.606525][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 123.606809][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 123.607073][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 123.607345][ T11] kthread (kernel/kthread.c:388) 
[ 123.607563][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.607812][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 123.608053][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.608302][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.611450][   T11] ------------[ cut here ]------------
| [  123.611773][   T11] sysfs group 'bridge' not found for kobject 'br3'
| [ 123.612193][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.612705][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.613633][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.614340][   T11] Workqueue: netns cleanup_net
[ 123.614636][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.614986][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  123.616064][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  123.616432][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  123.616895][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  123.617348][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  123.617879][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888004572628
[  123.618356][   T11] R13: ffff888004572df8 R14: ffffc900000bfc98 R15: ffff888004572bc0
[  123.618815][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  123.619312][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.619696][   T11] CR2: 000000000049cf40 CR3: 000000001a534005 CR4: 00000000001706f0
[  123.620165][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.620686][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.621145][   T11] Call Trace:
[  123.621362][   T11]  <TASK>
[ 123.621522][ T11] ? __warn (kernel/panic.c:677) 
[ 123.621782][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 123.622080][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.622375][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 123.622662][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 123.622948][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 123.623237][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 123.623532][ T11] ? 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) 
[ 123.623812][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.624143][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 123.624438][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 123.624738][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 123.625019][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.625309][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 123.625607][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 123.625885][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 123.626177][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 123.626467][ T11] ? 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) 
[ 123.626762][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 123.627089][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 123.627360][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 123.627616][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 123.627890][ T11] kthread (kernel/kthread.c:388) 
[ 123.628116][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.628364][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 123.628600][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 123.628847][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.047533][   T11] ------------[ cut here ]------------
| [  124.047850][   T11] sysfs group 'bridge' not found for kobject 'br1'
| [ 124.048269][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.048815][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.049781][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.050512][   T11] Workqueue: netns cleanup_net
[ 124.050806][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.051156][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  124.052318][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  124.052700][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  124.053200][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  124.053682][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  124.054204][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009a12628
[  124.054690][   T11] R13: ffff888009a12df8 R14: ffffc900000bfc98 R15: ffff888009a12bc0
[  124.055199][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  124.055731][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.056139][   T11] CR2: 00007faaff243000 CR3: 000000001a534002 CR4: 00000000001706f0
[  124.056587][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.057010][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.057426][   T11] Call Trace:
[  124.057615][   T11]  <TASK>
[ 124.057805][ T11] ? __warn (kernel/panic.c:677) 
[ 124.058050][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 124.058383][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.058702][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 124.059004][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 124.059286][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 124.059605][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 124.059888][ T11] ? 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) 
[ 124.060156][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.060434][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 124.060681][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 124.060973][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 124.061212][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 124.061479][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 124.061747][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 124.062058][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 124.062336][ T11] ? 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) 
[ 124.062576][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 124.062861][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 124.063115][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 124.063370][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 124.063642][ T11] kthread (kernel/kthread.c:388) 
[ 124.063860][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 124.064113][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 124.064360][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 124.064607][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.067890][   T11] ------------[ cut here ]------------
| [  124.068186][   T11] sysfs group 'bridge' not found for kobject 'br2'
| [ 124.068559][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.069053][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.069926][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.070676][   T11] Workqueue: netns cleanup_net
[ 124.070955][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.071294][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  124.072396][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  124.072766][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  124.073226][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  124.073730][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  124.074202][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800b15a628
[  124.074637][   T11] R13: ffff88800b15adf8 R14: ffffc900000bfc98 R15: ffff88800b15abc0
[  124.075076][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  124.075576][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.075932][   T11] CR2: 00007faaff243000 CR3: 000000001a534002 CR4: 00000000001706f0
[  124.076352][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.076766][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.077190][   T11] Call Trace:
[  124.077366][   T11]  <TASK>
[ 124.077524][ T11] ? __warn (kernel/panic.c:677) 
[ 124.077746][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 124.078010][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.078301][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 124.078549][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 124.078795][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 124.079152][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 124.079467][ T11] ? 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) 
[ 124.079749][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.080058][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 124.080367][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 124.080673][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 124.080939][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 124.081249][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 124.081506][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 124.081819][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 124.082112][ T11] ? 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) 
[ 124.082373][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 124.082696][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 124.082971][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 124.083246][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 124.083545][ T11] kthread (kernel/kthread.c:388) 
[ 124.083781][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 124.084086][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 124.084376][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 124.084672][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.087929][   T11] ------------[ cut here ]------------
| [  124.088226][   T11] sysfs group 'bridge' not found for kobject 'br3'
| [ 124.088614][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.089142][   T11] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.090064][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.090784][   T11] Workqueue: netns cleanup_net
[ 124.091052][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.091412][ T11] 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 8c 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 8c 	mov    $0xffffffff8c9ca7a0,%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
[  124.092535][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  124.092914][   T11] RAX: 0000000000000000 RBX: ffffffff8cdbe220 RCX: ffffffff89d1056f
[  124.093386][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  124.093861][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  124.094339][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800b602628
[  124.094778][   T11] R13: ffff88800b602df8 R14: ffffc900000bfc98 R15: ffff88800b602bc0
[  124.095281][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  124.095790][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.096209][   T11] CR2: 00007faaff243000 CR3: 000000001a534002 CR4: 00000000001706f0
[  124.096671][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.097152][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.097604][   T11] Call Trace:
[  124.097821][   T11]  <TASK>
[ 124.098007][ T11] ? __warn (kernel/panic.c:677) 
[ 124.098258][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 124.098554][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.098897][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 124.099460][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 124.099696][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 124.099987][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 124.100298][ T11] ? 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) 
[ 124.100587][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.100873][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 124.101145][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 124.101440][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 124.101711][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 124.101986][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 124.102267][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 124.102594][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 124.102939][ T11] ? 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) 
[ 124.103217][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 124.103549][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 124.103793][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 124.104066][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 124.104383][ T11] kthread (kernel/kthread.c:388) 
[ 124.104649][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 124.104944][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 124.105213][ T11] ? __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