======================================
| [    9.776048] ------------[ cut here ]------------
| [    9.776332] refcount_t: underflow; use-after-free.
| [    9.776643] WARNING: CPU: 0 PID: 69 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [    9.777123] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.777900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.778503] Workqueue: netns cleanup_net
[    9.778772] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 9.779102] Code: 0b 90 90 c3 cc cc cc cc 80 3d 69 d4 67 01 00 0f 85 75 ff ff ff c6 05 5c d4 67 01 01 90 48 c7 c7 b8 37 b3 b9 e8 a1 26 b4 ff 90 <0f> 0b 90 90 c3 cc cc cc cc 80 3d 3c d4 67 01 00 0f 85 4a ff ff ff
All code
========
   0:	0b 90 90 c3 cc cc    	or     -0x33333c70(%rax),%edx
   6:	cc                   	int3
   7:	cc                   	int3
   8:	80 3d 69 d4 67 01 00 	cmpb   $0x0,0x167d469(%rip)        # 0x167d478
   f:	0f 85 75 ff ff ff    	jne    0xffffffffffffff8a
  15:	c6 05 5c d4 67 01 01 	movb   $0x1,0x167d45c(%rip)        # 0x167d478
  1c:	90                   	nop
  1d:	48 c7 c7 b8 37 b3 b9 	mov    $0xffffffffb9b337b8,%rdi
  24:	e8 a1 26 b4 ff       	call   0xffffffffffb426ca
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	80 3d 3c d4 67 01 00 	cmpb   $0x0,0x167d43c(%rip)        # 0x167d476
  3a:	0f 85 4a ff ff ff    	jne    0xffffffffffffff8a

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	80 3d 3c d4 67 01 00 	cmpb   $0x0,0x167d43c(%rip)        # 0x167d44c
  10:	0f 85 4a ff ff ff    	jne    0xffffffffffffff60
[    9.780083] RSP: 0018:ffffaa568026bd78 EFLAGS: 00010286
[    9.780376] RAX: 0000000000000000 RBX: ffff952cc1d04000 RCX: 00000000ffffdfff
[    9.780792] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.781215] RBP: ffff952cc1d04610 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[    9.781618] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d04000
[    9.782011] R13: ffffaa568026be08 R14: ffff952cc1d04b80 R15: ffff952cc39f1750
[    9.782412] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[    9.782906] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.783246] CR2: 00007fff9ffa6588 CR3: 0000000002808002 CR4: 0000000000770ef0
[    9.783632] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.784046] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.784456] PKRU: 55555554
[    9.784649] Call Trace:
[    9.784818]  <TASK>
[    9.784987] ? __warn (kernel/panic.c:677) 
[    9.785221] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.785508] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.785739] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.785982] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.786220] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.786498] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.786782] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.787043] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[    9.787281] br_dev_delete (net/bridge/br_if.c:396) 
[    9.787509] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.787825] cleanup_net (net/core/net_namespace.c:630) 
[    9.788045] ? process_one_work (kernel/workqueue.c:2606) 
[    9.788289] process_one_work (kernel/workqueue.c:2633) 
[    9.788562] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.788808] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.789100] kthread (kernel/kthread.c:388) 
[    9.789306] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.789531] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.789765] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.790000] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [    9.792805] ------------[ cut here ]------------
| [    9.793084] sysfs group 'bridge' not found for kobject 'br0'
| [    9.793432] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [    9.793920] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.794737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.795373] Workqueue: netns cleanup_net
[    9.795618] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 9.795910] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[    9.796891] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[    9.797178] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[    9.797583] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.798032] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[    9.798441] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d04610
[    9.798835] R13: ffffaa568026be08 R14: ffff952cc1d04b80 R15: ffff952cc39f1750
[    9.799231] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[    9.799672] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.800032] CR2: 00007fff9ffa6588 CR3: 0000000002808002 CR4: 0000000000770ef0
[    9.800436] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.800841] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.801281] PKRU: 55555554
[    9.801458] Call Trace:
[    9.801616]  <TASK>
[    9.801783] ? __warn (kernel/panic.c:677) 
[    9.802005] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.802283] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.802514] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.802745] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.803024] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.803299] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.803571] br_dev_delete (net/bridge/br_if.c:396) 
[    9.803810] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.804073] cleanup_net (net/core/net_namespace.c:630) 
[    9.804313] ? process_one_work (kernel/workqueue.c:2606) 
[    9.804568] process_one_work (kernel/workqueue.c:2633) 
[    9.804851] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.805078] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.805351] kthread (kernel/kthread.c:388) 
[    9.805568] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.805778] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.805969] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.806196] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [    9.915972] ------------[ cut here ]------------
| [    9.916381] sysfs group 'bridge' not found for kobject 'br0'
| [    9.916892] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [    9.917551] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.918792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.919716] Workqueue: netns cleanup_net
[    9.920091] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 9.920539] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[    9.922011] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[    9.922452] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[    9.923072] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.923707] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[    9.924312] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d02610
[    9.924909] R13: ffffaa568026be08 R14: ffff952cc1d02b80 R15: ffff952cc3960050
[    9.925527] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[    9.926220] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.926739] CR2: 00007fff9ffa6588 CR3: 0000000036460003 CR4: 0000000000770ef0
[    9.927325] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.927941] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.928569] PKRU: 55555554
[    9.928846] Call Trace:
[    9.929084]  <TASK>
[    9.929306] ? __warn (kernel/panic.c:677) 
[    9.929608] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.930016] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.930363] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.930646] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.931013] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.931423] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.931809] br_dev_delete (net/bridge/br_if.c:396) 
[    9.932151] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.932504] cleanup_net (net/core/net_namespace.c:630) 
[    9.932818] ? process_one_work (kernel/workqueue.c:2606) 
[    9.933151] process_one_work (kernel/workqueue.c:2633) 
[    9.933532] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.933946] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.934335] kthread (kernel/kthread.c:388) 
[    9.934628] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.934983] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.935337] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.935735] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [    9.940088] ------------[ cut here ]------------
| [    9.940511] sysfs group 'bridge' not found for kobject 'br0'
| [    9.941178] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [    9.942569] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.944857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.946216] Workqueue: netns cleanup_net
[    9.946625] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 9.947066] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[    9.948867] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[    9.949486] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[    9.950334] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.951261] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[    9.951986] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc21be610
[    9.952762] R13: ffffaa568026be08 R14: ffff952cc21beb80 R15: ffff952cc3960050
[    9.953547] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[    9.954442] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.954976] CR2: 00007ffec19cbb88 CR3: 0000000002a78001 CR4: 0000000000770ef0
[    9.955590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.956203] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.956755] PKRU: 55555554
[    9.956903] Call Trace:
[    9.957046]  <TASK>
[    9.957175] ? __warn (kernel/panic.c:677) 
[    9.957407] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.957631] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.957962] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.958232] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.958434] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.958664] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.958884] br_dev_delete (net/bridge/br_if.c:396) 
[    9.959075] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.959441] cleanup_net (net/core/net_namespace.c:630) 
[    9.959771] ? process_one_work (kernel/workqueue.c:2606) 
[    9.960160] process_one_work (kernel/workqueue.c:2633) 
[    9.960513] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.960719] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.961040] kthread (kernel/kthread.c:388) 
[    9.961332] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.961539] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.961856] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.962225] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   10.073835] ------------[ cut here ]------------
| [   10.074341] sysfs group 'bridge' not found for kobject 'br0'
| [   10.074911] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   10.075529] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   10.076358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   10.076954] Workqueue: netns cleanup_net
[   10.077275] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 10.077716] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   10.079035] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   10.079532] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   10.080249] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   10.080903] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   10.081563] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d06610
[   10.082178] R13: ffffaa568026be08 R14: ffff952cc1d06b80 R15: ffff952cc2b60050
[   10.082856] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[   10.083589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.084144] CR2: 00007ffec19cbb88 CR3: 0000000036460003 CR4: 0000000000770ef0
[   10.084804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.085457] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.086093] PKRU: 55555554
[   10.086346] Call Trace:
[   10.086562]  <TASK>
[   10.086778] ? __warn (kernel/panic.c:677) 
[   10.087073] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.087472] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   10.087808] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   10.088139] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   10.088497] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   10.088857] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.089268] br_dev_delete (net/bridge/br_if.c:396) 
[   10.089585] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   10.090015] cleanup_net (net/core/net_namespace.c:630) 
[   10.090346] ? process_one_work (kernel/workqueue.c:2606) 
[   10.090712] process_one_work (kernel/workqueue.c:2633) 
[   10.091047] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   10.091393] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   10.091823] kthread (kernel/kthread.c:388) 
[   10.092141] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.092478] ret_from_fork (arch/x86/kernel/process.c:147) 
[   10.092717] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.092913] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.075093] ------------[ cut here ]------------
| [   18.075530] sysfs group 'bridge' not found for kobject 'br0'
| [   18.076156] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.076957] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.078394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.079528] Workqueue: netns cleanup_net
[   18.079947] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.080382] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   18.082037] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   18.082498] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   18.083152] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.083522] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   18.083917] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a64610
[   18.084276] R13: ffffaa568026be08 R14: ffff952cc2a64b80 R15: ffff952cc2b61750
[   18.084636] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   18.085047] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.085340] CR2: 00007f6fd5622000 CR3: 0000000036460003 CR4: 0000000000770ef0
[   18.085711] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.086071] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.086429] PKRU: 55555554
[   18.086572] Call Trace:
[   18.086713]  <TASK>
[   18.086831] ? __warn (kernel/panic.c:677) 
[   18.087004] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.087221] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.087416] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.087600] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.087809] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.088033] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.088249] br_dev_delete (net/bridge/br_if.c:396) 
[   18.088440] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.088680] cleanup_net (net/core/net_namespace.c:630) 
[   18.088872] ? process_one_work (kernel/workqueue.c:2606) 
[   18.089091] process_one_work (kernel/workqueue.c:2633) 
[   18.089302] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.089499] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.089731] kthread (kernel/kthread.c:388) 
[   18.089900] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.090096] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.090286] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.090481] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.182838] ------------[ cut here ]------------
| [   18.183329] sysfs group 'bridge' not found for kobject 'br0'
| [   18.183841] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.184580] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.185994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.187063] Workqueue: netns cleanup_net
[   18.187277] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.187572] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   18.188673] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   18.188982] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   18.189594] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.190143] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   18.190760] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1ff6610
[   18.191368] R13: ffffaa568026be08 R14: ffff952cc1ff6b80 R15: ffff952cc2b60050
[   18.191900] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   18.192599] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.193088] CR2: 00007f50e4dc4000 CR3: 0000000036460002 CR4: 0000000000770ef0
[   18.193684] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.194330] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.194989] PKRU: 55555554
[   18.195226] Call Trace:
[   18.195451]  <TASK>
[   18.195662] ? __warn (kernel/panic.c:677) 
[   18.195974] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.196361] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.196733] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.197057] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.197420] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.197764] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.197984] br_dev_delete (net/bridge/br_if.c:396) 
[   18.198229] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.198467] cleanup_net (net/core/net_namespace.c:630) 
[   18.198668] ? process_one_work (kernel/workqueue.c:2606) 
[   18.198893] process_one_work (kernel/workqueue.c:2633) 
[   18.199120] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.199449] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.199787] kthread (kernel/kthread.c:388) 
[   18.199957] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.200252] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.200567] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.200935] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.205671] ------------[ cut here ]------------
| [   18.206250] sysfs group 'bridge' not found for kobject 'br0'
| [   18.206760] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.207468] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.208707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.209334] Workqueue: netns cleanup_net
[   18.209635] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.209930] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   18.211118] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   18.211422] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   18.212023] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.212686] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   18.213318] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a62610
[   18.213956] R13: ffffaa568026be08 R14: ffff952cc2a62b80 R15: ffff952cc2b60050
[   18.214630] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   18.215350] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.215909] CR2: 00007f8175e35000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   18.216563] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.217215] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.217820] PKRU: 55555554
[   18.218059] Call Trace:
[   18.218361]  <TASK>
[   18.218648] ? __warn (kernel/panic.c:677) 
[   18.218936] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.219329] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.219802] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.220181] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.220440] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.220684] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.220932] br_dev_delete (net/bridge/br_if.c:396) 
[   18.221184] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.221414] cleanup_net (net/core/net_namespace.c:630) 
[   18.221615] ? process_one_work (kernel/workqueue.c:2606) 
[   18.221845] process_one_work (kernel/workqueue.c:2633) 
[   18.222058] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.222255] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.222475] kthread (kernel/kthread.c:388) 
[   18.222659] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.222855] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.223046] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.223242] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.345855] ------------[ cut here ]------------
| [   18.346108] sysfs group 'bridge' not found for kobject 'br0'
| [   18.346438] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.346901] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.347690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.348278] Workqueue: netns cleanup_net
[   18.348509] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.348784] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   18.349739] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   18.350032] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   18.350413] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.350801] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   18.351166] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc552c610
[   18.351556] R13: ffffaa568026be08 R14: ffff952cc552cb80 R15: ffff952cc2b62e50
[   18.351972] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   18.352398] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.352718] CR2: 00007f4ae298c000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   18.353098] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.353492] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.353885] PKRU: 55555554
[   18.354052] Call Trace:
[   18.354195]  <TASK>
[   18.354337] ? __warn (kernel/panic.c:677) 
[   18.354558] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.354799] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.355011] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.355197] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.355419] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.355698] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.355934] br_dev_delete (net/bridge/br_if.c:396) 
[   18.356145] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.356405] cleanup_net (net/core/net_namespace.c:630) 
[   18.356620] ? process_one_work (kernel/workqueue.c:2606) 
[   18.356874] process_one_work (kernel/workqueue.c:2633) 
[   18.357109] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.357321] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.357567] kthread (kernel/kthread.c:388) 
[   18.357781] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.357996] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.358196] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.358418] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.109937] ------------[ cut here ]------------
| [   26.110225] sysfs group 'bridge' not found for kobject 'br0'
| [   26.110593] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.111048] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.111905] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.112525] Workqueue: netns cleanup_net
[   26.112790] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.113092] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   26.114104] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   26.114401] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   26.114805] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.115226] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   26.115631] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfc610
[   26.116027] R13: ffffaa568026be08 R14: ffff952cc4bfcb80 R15: ffff952cc3890050
[   26.116444] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   26.116905] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.117223] CR2: 00007fff9ffa6588 CR3: 0000000002808004 CR4: 0000000000770ef0
[   26.117601] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.117992] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.118387] PKRU: 55555554
[   26.118555] Call Trace:
[   26.118714]  <TASK>
[   26.118861] ? __warn (kernel/panic.c:677) 
[   26.119066] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.119313] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.119525] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.119750] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.119989] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.120240] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.120478] br_dev_delete (net/bridge/br_if.c:396) 
[   26.120710] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.120999] cleanup_net (net/core/net_namespace.c:630) 
[   26.121236] ? process_one_work (kernel/workqueue.c:2606) 
[   26.121479] process_one_work (kernel/workqueue.c:2633) 
[   26.121732] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.121973] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.122232] kthread (kernel/kthread.c:388) 
[   26.122425] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.122669] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.122892] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.123118] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.226868] ------------[ cut here ]------------
| [   26.227128] sysfs group 'bridge' not found for kobject 'br0'
| [   26.227454] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.227928] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.228708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.229350] Workqueue: netns cleanup_net
[   26.229588] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.229904] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   26.230900] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   26.231216] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   26.231650] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.232066] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   26.232485] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[   26.232908] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc2b62e50
[   26.233299] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   26.233759] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.234102] CR2: 000055d5779cfdec CR3: 0000000036460003 CR4: 0000000000770ef0
[   26.234517] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.234932] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.235310] PKRU: 55555554
[   26.235481] Call Trace:
[   26.235677]  <TASK>
[   26.235834] ? __warn (kernel/panic.c:677) 
[   26.236023] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.236303] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.236531] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.236772] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.237010] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.237270] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.237506] br_dev_delete (net/bridge/br_if.c:396) 
[   26.237745] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.238004] cleanup_net (net/core/net_namespace.c:630) 
[   26.238211] ? process_one_work (kernel/workqueue.c:2606) 
[   26.238463] process_one_work (kernel/workqueue.c:2633) 
[   26.238735] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.238962] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.239208] kthread (kernel/kthread.c:388) 
[   26.239404] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.239626] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.239857] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.240095] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.242939] ------------[ cut here ]------------
| [   26.243307] sysfs group 'bridge' not found for kobject 'br0'
| [   26.243849] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.244532] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.245811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.246837] Workqueue: netns cleanup_net
[   26.247206] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.247631] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   26.249226] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   26.249700] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   26.250318] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.250982] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   26.251613] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfa610
[   26.252237] R13: ffffaa568026be08 R14: ffff952cc4bfab80 R15: ffff952cc2b62e50
[   26.252860] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   26.253539] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.253847] CR2: 00007ff83a3df000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   26.254315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.254682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.255042] PKRU: 55555554
[   26.255188] Call Trace:
[   26.255321]  <TASK>
[   26.255440] ? __warn (kernel/panic.c:677) 
[   26.255707] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.256054] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.256382] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.256588] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.256798] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.257159] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.257506] br_dev_delete (net/bridge/br_if.c:396) 
[   26.257870] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.258320] cleanup_net (net/core/net_namespace.c:630) 
[   26.258720] ? process_one_work (kernel/workqueue.c:2606) 
[   26.259196] process_one_work (kernel/workqueue.c:2633) 
[   26.259628] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.260038] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.260446] kthread (kernel/kthread.c:388) 
[   26.260779] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.261221] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.261615] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.262024] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.380877] ------------[ cut here ]------------
| [   26.381403] sysfs group 'bridge' not found for kobject 'br0'
| [   26.381981] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.382844] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.384403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.385551] Workqueue: netns cleanup_net
[   26.385969] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.386468] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   26.388184] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   26.388638] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   26.389309] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.389933] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   26.390611] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc21be610
[   26.391234] R13: ffffaa568026be08 R14: ffff952cc21beb80 R15: ffff952cc39f2e50
[   26.391627] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   26.392083] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.392463] CR2: 00007fff9ffa4c78 CR3: 0000000002808006 CR4: 0000000000770ef0
[   26.393024] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.393445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.393830] PKRU: 55555554
[   26.393985] Call Trace:
[   26.394159]  <TASK>
[   26.394412] ? __warn (kernel/panic.c:677) 
[   26.394802] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.395228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.395633] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.396114] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.396709] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.397326] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.397941] br_dev_delete (net/bridge/br_if.c:396) 
[   26.398492] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.399129] cleanup_net (net/core/net_namespace.c:630) 
[   26.399637] ? process_one_work (kernel/workqueue.c:2606) 
[   26.400300] process_one_work (kernel/workqueue.c:2633) 
[   26.400891] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.401508] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.402146] kthread (kernel/kthread.c:388) 
[   26.402612] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.403173] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.403722] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.404202] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.390849] ------------[ cut here ]------------
| [   34.391250] sysfs group 'bridge' not found for kobject 'br0'
| [   34.391561] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.392089] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.393099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.393692] Workqueue: netns cleanup_net
[   34.394007] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.394473] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   34.395909] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   34.396426] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   34.397120] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.397812] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   34.398558] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[   34.399216] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc2b62e50
[   34.399882] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   34.400671] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.401244] CR2: 00007f5e70d690e0 CR3: 00000000025ce003 CR4: 0000000000770ef0
[   34.401917] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.402522] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.403136] PKRU: 55555554
[   34.403364] Call Trace:
[   34.403614]  <TASK>
[   34.403834] ? __warn (kernel/panic.c:677) 
[   34.404127] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.404519] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.404876] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.405179] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.405568] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.405860] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.406085] br_dev_delete (net/bridge/br_if.c:396) 
[   34.406314] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.406580] cleanup_net (net/core/net_namespace.c:630) 
[   34.406789] ? process_one_work (kernel/workqueue.c:2606) 
[   34.407013] process_one_work (kernel/workqueue.c:2633) 
[   34.407236] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.407441] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.407681] kthread (kernel/kthread.c:388) 
[   34.407859] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.408056] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.408245] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.408440] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.507831] ------------[ cut here ]------------
| [   34.508368] sysfs group 'bridge' not found for kobject 'br0'
| [   34.508942] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.509792] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.510838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.511667] Workqueue: netns cleanup_net
[   34.512039] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.512291] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   34.513389] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   34.513863] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   34.514428] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.515004] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   34.515707] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29c8610
[   34.516421] R13: ffffaa568026be08 R14: ffff952cc29c8b80 R15: ffff952cc39f2e50
[   34.517130] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   34.517948] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.518587] CR2: 00007f5e70d690e0 CR3: 00000000025ce003 CR4: 0000000000770ef0
[   34.519468] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.520235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.520916] PKRU: 55555554
[   34.521208] Call Trace:
[   34.521490]  <TASK>
[   34.521742] ? __warn (kernel/panic.c:677) 
[   34.522101] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.522493] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.522821] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.523153] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.523494] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.523937] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.524353] br_dev_delete (net/bridge/br_if.c:396) 
[   34.524746] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.525237] cleanup_net (net/core/net_namespace.c:630) 
[   34.525640] ? process_one_work (kernel/workqueue.c:2606) 
[   34.525975] process_one_work (kernel/workqueue.c:2633) 
[   34.526342] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.526662] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.527111] kthread (kernel/kthread.c:388) 
[   34.527431] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.527806] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.528144] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.528502] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.532579] ------------[ cut here ]------------
| [   34.532833] sysfs group 'bridge' not found for kobject 'br0'
| [   34.533336] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.533777] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.534608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.535544] Workqueue: netns cleanup_net
[   34.535933] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.536316] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   34.537733] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   34.538007] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   34.538536] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.539134] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   34.539764] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b82610
[   34.540422] R13: ffffaa568026be08 R14: ffff952cc4b82b80 R15: ffff952cc39f2e50
[   34.541153] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   34.541991] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.542647] CR2: 00007f5e70d690e0 CR3: 00000000025ce003 CR4: 0000000000770ef0
[   34.543376] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.544149] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.544956] PKRU: 55555554
[   34.545229] Call Trace:
[   34.545546]  <TASK>
[   34.545784] ? __warn (kernel/panic.c:677) 
[   34.546125] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.546505] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.546710] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.546897] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.547206] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.547429] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.547650] br_dev_delete (net/bridge/br_if.c:396) 
[   34.547850] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.548080] cleanup_net (net/core/net_namespace.c:630) 
[   34.548375] ? process_one_work (kernel/workqueue.c:2606) 
[   34.548690] process_one_work (kernel/workqueue.c:2633) 
[   34.549061] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.549315] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.549550] kthread (kernel/kthread.c:388) 
[   34.549837] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.550143] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.550469] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.550793] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.664868] ------------[ cut here ]------------
| [   34.665270] sysfs group 'bridge' not found for kobject 'br0'
| [   34.665789] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.666270] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.667512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.668501] Workqueue: netns cleanup_net
[   34.668883] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.669294] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   34.670926] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   34.671373] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   34.672056] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.672674] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   34.673311] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[   34.673963] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffff952cc39f4550
[   34.674585] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   34.675316] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.675877] CR2: 00007f5e70d690e0 CR3: 00000000025ce003 CR4: 0000000000770ef0
[   34.676488] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.677052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.677688] PKRU: 55555554
[   34.677925] Call Trace:
[   34.678141]  <TASK>
[   34.678315] ? __warn (kernel/panic.c:677) 
[   34.678621] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.678984] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.679282] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.679603] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.679953] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.680295] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.680674] br_dev_delete (net/bridge/br_if.c:396) 
[   34.680994] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.681385] cleanup_net (net/core/net_namespace.c:630) 
[   34.681623] ? process_one_work (kernel/workqueue.c:2606) 
[   34.681855] process_one_work (kernel/workqueue.c:2633) 
[   34.682113] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.682384] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.682661] kthread (kernel/kthread.c:388) 
[   34.682969] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.683308] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.683585] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.683899] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.511896] ------------[ cut here ]------------
| [   42.512352] sysfs group 'bridge' not found for kobject 'br0'
| [   42.512897] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.513596] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.514788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.515697] Workqueue: netns cleanup_net
[   42.516015] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.516449] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.517936] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   42.518207] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   42.518610] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.519143] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   42.519686] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc552c610
[   42.520047] R13: ffffaa568026be08 R14: ffff952cc552cb80 R15: ffff952cc39f2e50
[   42.520433] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   42.521102] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.521423] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[   42.521883] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.522466] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.523106] PKRU: 55555554
[   42.523372] Call Trace:
[   42.523584]  <TASK>
[   42.523768] ? __warn (kernel/panic.c:677) 
[   42.524060] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.524404] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.524710] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.525012] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.525337] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.525706] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.526057] br_dev_delete (net/bridge/br_if.c:396) 
[   42.526372] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.526757] cleanup_net (net/core/net_namespace.c:630) 
[   42.527071] ? process_one_work (kernel/workqueue.c:2606) 
[   42.527442] process_one_work (kernel/workqueue.c:2633) 
[   42.527784] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.528081] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.528451] kthread (kernel/kthread.c:388) 
[   42.528715] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.529044] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.529292] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.529604] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.636846] ------------[ cut here ]------------
| [   42.637252] sysfs group 'bridge' not found for kobject 'br0'
| [   42.637763] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.638451] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.639673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.640567] Workqueue: netns cleanup_net
[   42.640860] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.641263] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.642641] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   42.643083] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   42.643650] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.644049] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   42.644448] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b0610
[   42.644893] R13: ffffaa568026be08 R14: ffff952cc49b0b80 R15: ffff952cc39f4550
[   42.645349] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   42.645763] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.646100] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[   42.646724] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.647249] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.647829] PKRU: 55555554
[   42.648049] Call Trace:
[   42.648209]  <TASK>
[   42.648326] ? __warn (kernel/panic.c:677) 
[   42.648524] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.648852] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.649184] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.649513] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.649840] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.650228] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.650612] br_dev_delete (net/bridge/br_if.c:396) 
[   42.650931] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.651379] cleanup_net (net/core/net_namespace.c:630) 
[   42.651709] ? process_one_work (kernel/workqueue.c:2606) 
[   42.652084] process_one_work (kernel/workqueue.c:2633) 
[   42.652448] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.652798] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.653183] kthread (kernel/kthread.c:388) 
[   42.653478] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.653828] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.654142] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.654485] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.657553] ------------[ cut here ]------------
| [   42.657796] sysfs group 'bridge' not found for kobject 'br0'
| [   42.658195] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.658808] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.659993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.660908] Workqueue: netns cleanup_net
[   42.661250] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.661661] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.663196] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   42.663633] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   42.664238] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.664833] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   42.665409] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260e610
[   42.665950] R13: ffffaa568026be08 R14: ffff952cc260eb80 R15: ffff952cc39f4550
[   42.666478] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   42.667128] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.667564] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[   42.668103] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.668661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.669229] PKRU: 55555554
[   42.669375] Call Trace:
[   42.669508]  <TASK>
[   42.669624] ? __warn (kernel/panic.c:677) 
[   42.669814] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.670071] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.670295] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.670594] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.670803] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.671038] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.671258] br_dev_delete (net/bridge/br_if.c:396) 
[   42.671515] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.671888] cleanup_net (net/core/net_namespace.c:630) 
[   42.672116] ? process_one_work (kernel/workqueue.c:2606) 
[   42.672344] process_one_work (kernel/workqueue.c:2633) 
[   42.672678] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.673017] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.673404] kthread (kernel/kthread.c:388) 
[   42.673693] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.674065] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.674422] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.674779] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.791857] ------------[ cut here ]------------
| [   42.792258] sysfs group 'bridge' not found for kobject 'br0'
| [   42.792711] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.793154] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.794109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.794698] Workqueue: netns cleanup_net
[   42.794972] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.795342] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.796561] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   42.797007] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   42.797598] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.798180] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   42.798797] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2608610
[   42.799398] R13: ffffaa568026be08 R14: ffff952cc2608b80 R15: ffff952cc3891750
[   42.800027] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   42.800728] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.801232] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[   42.801875] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.802474] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.803077] PKRU: 55555554
[   42.803330] Call Trace:
[   42.803530]  <TASK>
[   42.803698] ? __warn (kernel/panic.c:677) 
[   42.803975] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.804312] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.804632] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.804908] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.805217] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.805553] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.805922] br_dev_delete (net/bridge/br_if.c:396) 
[   42.806182] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.806547] cleanup_net (net/core/net_namespace.c:630) 
[   42.806843] ? process_one_work (kernel/workqueue.c:2606) 
[   42.807200] process_one_work (kernel/workqueue.c:2633) 
[   42.807412] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.807610] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.807862] kthread (kernel/kthread.c:388) 
[   42.808104] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.808307] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.808501] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.808706] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.737981] ------------[ cut here ]------------
| [   50.738257] sysfs group 'bridge' not found for kobject 'br0'
| [   50.738613] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.739079] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.739878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.740496] Workqueue: netns cleanup_net
[   50.740761] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.741057] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   50.742061] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   50.742378] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   50.742799] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.743191] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   50.743566] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d06610
[   50.743981] R13: ffffaa568026be08 R14: ffff952cc1d06b80 R15: ffff952cc3892e50
[   50.744411] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   50.744850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.745174] CR2: 00007fba57c1f000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   50.745581] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.745994] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.746394] PKRU: 55555554
[   50.746573] Call Trace:
[   50.746751]  <TASK>
[   50.746897] ? __warn (kernel/panic.c:677) 
[   50.747095] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.747353] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   50.747568] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   50.747797] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   50.748036] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   50.748293] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.748537] br_dev_delete (net/bridge/br_if.c:396) 
[   50.748775] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   50.749059] cleanup_net (net/core/net_namespace.c:630) 
[   50.749302] ? process_one_work (kernel/workqueue.c:2606) 
[   50.749539] process_one_work (kernel/workqueue.c:2633) 
[   50.749795] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   50.750041] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   50.750304] kthread (kernel/kthread.c:388) 
[   50.750489] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.750732] ret_from_fork (arch/x86/kernel/process.c:147) 
[   50.750976] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.751219] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.846875] ------------[ cut here ]------------
| [   50.847172] sysfs group 'bridge' not found for kobject 'br0'
| [   50.847527] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.847971] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.848783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.849398] Workqueue: netns cleanup_net
[   50.849637] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.849919] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   50.850885] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   50.851209] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   50.851601] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.851988] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   50.852385] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc552a610
[   50.852792] R13: ffffaa568026be08 R14: ffff952cc552ab80 R15: ffff952cc3891750
[   50.853188] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   50.853612] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.853940] CR2: 00007fba57c1f000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   50.854342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.854758] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.855134] PKRU: 55555554
[   50.855313] Call Trace:
[   50.855504]  <TASK>
[   50.855649] ? __warn (kernel/panic.c:677) 
[   50.855847] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.856114] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   50.856361] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   50.856588] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   50.856813] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   50.857067] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.857343] br_dev_delete (net/bridge/br_if.c:396) 
[   50.857579] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   50.857841] cleanup_net (net/core/net_namespace.c:630) 
[   50.858081] ? process_one_work (kernel/workqueue.c:2606) 
[   50.858353] process_one_work (kernel/workqueue.c:2633) 
[   50.858596] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   50.858835] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   50.859116] kthread (kernel/kthread.c:388) 
[   50.859308] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.859537] ret_from_fork (arch/x86/kernel/process.c:147) 
[   50.859791] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.860030] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.862925] ------------[ cut here ]------------
| [   50.863214] sysfs group 'bridge' not found for kobject 'br0'
| [   50.863546] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.863968] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.864805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.865434] Workqueue: netns cleanup_net
[   50.865704] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.865990] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   50.866996] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   50.867305] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   50.867721] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.868132] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   50.868512] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[   50.868907] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffff952cc3891750
[   50.869326] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   50.869819] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.870156] CR2: 00007fba57c1f000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   50.870552] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.870964] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.871369] PKRU: 55555554
[   50.871561] Call Trace:
[   50.871747]  <TASK>
[   50.871882] ? __warn (kernel/panic.c:677) 
[   50.872087] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.872354] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   50.872583] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   50.872808] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   50.873053] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   50.873302] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.873556] br_dev_delete (net/bridge/br_if.c:396) 
[   50.873823] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   50.874084] cleanup_net (net/core/net_namespace.c:630) 
[   50.874298] ? process_one_work (kernel/workqueue.c:2606) 
[   50.874552] process_one_work (kernel/workqueue.c:2633) 
[   50.874818] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   50.875054] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   50.875293] kthread (kernel/kthread.c:388) 
[   50.875491] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.875742] ret_from_fork (arch/x86/kernel/process.c:147) 
[   50.876003] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.876224] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.992911] ------------[ cut here ]------------
| [   50.993187] sysfs group 'bridge' not found for kobject 'br0'
| [   50.993539] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.993989] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.994813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.995428] Workqueue: netns cleanup_net
[   50.995639] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.995909] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   50.996869] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   50.997182] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   50.997582] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.997978] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   50.998343] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc5528610
[   50.998714] R13: ffffaa568026be08 R14: ffff952cc5528b80 R15: ffff952cc3965c50
[   50.999113] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   50.999610] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.999942] CR2: 00007fba57c1f000 CR3: 0000000036460004 CR4: 0000000000770ef0
[   51.000334] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.000733] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.001163] PKRU: 55555554
[   51.001360] Call Trace:
[   51.001535]  <TASK>
[   51.001676] ? __warn (kernel/panic.c:677) 
[   51.001881] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.002154] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   51.002388] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   51.002599] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   51.002812] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   51.003064] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.003360] br_dev_delete (net/bridge/br_if.c:396) 
[   51.003562] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   51.003829] cleanup_net (net/core/net_namespace.c:630) 
[   51.004049] ? process_one_work (kernel/workqueue.c:2606) 
[   51.004321] process_one_work (kernel/workqueue.c:2633) 
[   51.004584] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   51.004828] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   51.005088] kthread (kernel/kthread.c:388) 
[   51.005274] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.005509] ret_from_fork (arch/x86/kernel/process.c:147) 
[   51.005758] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.005989] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   58.908889] ------------[ cut here ]------------
| [   58.909179] sysfs group 'bridge' not found for kobject 'br0'
| [   58.909533] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   58.909959] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   58.910760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   58.911380] Workqueue: netns cleanup_net
[   58.911616] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 58.911900] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   58.912863] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   58.913156] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   58.913546] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   58.913938] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   58.914326] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29cc610
[   58.914718] R13: ffffaa568026be08 R14: ffff952cc29ccb80 R15: ffff952cc39f1750
[   58.915107] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   58.915536] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   58.915862] CR2: 00007fc88e6e7000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   58.916249] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   58.916631] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   58.917018] PKRU: 55555554
[   58.917184] Call Trace:
[   58.917342]  <TASK>
[   58.917461] ? __warn (kernel/panic.c:677) 
[   58.917637] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   58.917864] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   58.918063] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   58.918273] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   58.918516] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   58.918769] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   58.919012] br_dev_delete (net/bridge/br_if.c:396) 
[   58.919225] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   58.919477] cleanup_net (net/core/net_namespace.c:630) 
[   58.919712] ? process_one_work (kernel/workqueue.c:2606) 
[   58.919955] process_one_work (kernel/workqueue.c:2633) 
[   58.920187] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   58.920408] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   58.920690] kthread (kernel/kthread.c:388) 
[   58.920889] ? __pfx_kthread (kernel/kthread.c:341) 
[   58.921119] ret_from_fork (arch/x86/kernel/process.c:147) 
[   58.921313] ? __pfx_kthread (kernel/kthread.c:341) 
[   58.921540] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.060860] ------------[ cut here ]------------
| [   59.061119] sysfs group 'bridge' not found for kobject 'br0'
| [   59.061457] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.061914] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.062706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.063306] Workqueue: netns cleanup_net
[   59.063549] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.063833] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   59.064786] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   59.065082] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   59.065483] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.065880] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   59.066259] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b82610
[   59.066646] R13: ffffaa568026be08 R14: ffff952cc4b82b80 R15: ffffffffbb478f90
[   59.067048] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   59.067482] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.067802] CR2: 00007fc88e6e7000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   59.068197] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.068589] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.068982] PKRU: 55555554
[   59.069142] Call Trace:
[   59.069289]  <TASK>
[   59.069423] ? __warn (kernel/panic.c:677) 
[   59.069628] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.069885] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.070100] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.070316] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.070553] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.070812] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.071054] br_dev_delete (net/bridge/br_if.c:396) 
[   59.071276] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.071543] cleanup_net (net/core/net_namespace.c:630) 
[   59.071764] ? process_one_work (kernel/workqueue.c:2606) 
[   59.072000] process_one_work (kernel/workqueue.c:2633) 
[   59.072240] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.072470] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.072729] kthread (kernel/kthread.c:388) 
[   59.072915] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.073144] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.073367] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.073588] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.076341] ------------[ cut here ]------------
| [   59.076611] sysfs group 'bridge' not found for kobject 'br0'
| [   59.076963] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.077395] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.078187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.078803] Workqueue: netns cleanup_net
[   59.079033] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.079293] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   59.080254] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   59.080559] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   59.080968] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.081348] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   59.081749] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ac610
[   59.082143] R13: ffffaa568026be08 R14: ffff952cc55acb80 R15: ffffffffbb478f90
[   59.082531] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   59.082958] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.083283] CR2: 00007fc88e6e7000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   59.083689] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.084074] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.084451] PKRU: 55555554
[   59.084625] Call Trace:
[   59.084814]  <TASK>
[   59.084959] ? __warn (kernel/panic.c:677) 
[   59.085148] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.085397] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.085623] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.085845] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.086061] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.086309] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.086561] br_dev_delete (net/bridge/br_if.c:396) 
[   59.086784] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.087031] cleanup_net (net/core/net_namespace.c:630) 
[   59.087255] ? process_one_work (kernel/workqueue.c:2606) 
[   59.087510] process_one_work (kernel/workqueue.c:2633) 
[   59.087756] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.087969] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.088224] kthread (kernel/kthread.c:388) 
[   59.088430] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.088662] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.088869] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.089096] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.091834] ------------[ cut here ]------------
| [   59.092094] sysfs group 'bridge' not found for kobject 'br0'
| [   59.092433] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.092875] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.093640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.094246] Workqueue: netns cleanup_net
[   59.094474] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.094753] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   59.095689] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   59.096026] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   59.096442] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.096839] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   59.097227] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ae610
[   59.097609] R13: ffffaa568026be08 R14: ffff952cc55aeb80 R15: ffffffffbb478f90
[   59.098010] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   59.098453] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.098780] CR2: 00007fc88e6e7000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   59.099155] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.099546] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.099956] PKRU: 55555554
[   59.100121] Call Trace:
[   59.100276]  <TASK>
[   59.100392] ? __warn (kernel/panic.c:677) 
[   59.100567] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.100823] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.101060] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.101253] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.101478] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.101729] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.101990] br_dev_delete (net/bridge/br_if.c:396) 
[   59.102208] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.102472] cleanup_net (net/core/net_namespace.c:630) 
[   59.102704] ? process_one_work (kernel/workqueue.c:2606) 
[   59.102936] process_one_work (kernel/workqueue.c:2633) 
[   59.103180] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.103422] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.103681] kthread (kernel/kthread.c:388) 
[   59.103863] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.104091] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.104313] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.104535] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.173839] ------------[ cut here ]------------
| [   67.174288] sysfs group 'bridge' not found for kobject 'br0'
| [   67.174829] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.175459] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.176754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.177709] Workqueue: netns cleanup_net
[   67.177958] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.178243] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   67.179440] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   67.179715] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   67.180179] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.180692] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   67.181179] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260e610
[   67.181910] R13: ffffaa568026be08 R14: ffff952cc260eb80 R15: ffff952cc39f1750
[   67.182810] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   67.183793] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.184476] CR2: 00007f5e70d690e0 CR3: 00000000025ce006 CR4: 0000000000770ef0
[   67.185366] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.186253] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.187022] PKRU: 55555554
[   67.187340] Call Trace:
[   67.187582]  <TASK>
[   67.187836] ? __warn (kernel/panic.c:677) 
[   67.188156] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.188540] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.188945] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.189258] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.189659] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.190129] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.190349] br_dev_delete (net/bridge/br_if.c:396) 
[   67.190567] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.190827] cleanup_net (net/core/net_namespace.c:630) 
[   67.191029] ? process_one_work (kernel/workqueue.c:2606) 
[   67.191249] process_one_work (kernel/workqueue.c:2633) 
[   67.191461] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.191664] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.191890] kthread (kernel/kthread.c:388) 
[   67.192062] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.192258] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.192449] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.192646] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.323837] ------------[ cut here ]------------
| [   67.324257] sysfs group 'bridge' not found for kobject 'br0'
| [   67.324783] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.325435] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.326375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.327019] Workqueue: netns cleanup_net
[   67.327229] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.327478] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   67.328445] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   67.328723] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   67.329087] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.329449] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   67.329818] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2608610
[   67.330180] R13: ffffaa568026be08 R14: ffff952cc2608b80 R15: ffffffffbb478f90
[   67.330543] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[   67.330965] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.331260] CR2: 00007fde9ce63000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   67.331624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.331991] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.332353] PKRU: 55555554
[   67.332497] Call Trace:
[   67.332631]  <TASK>
[   67.332756] ? __warn (kernel/panic.c:677) 
[   67.332931] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.333152] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.333350] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.333538] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.333746] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.333968] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.334190] br_dev_delete (net/bridge/br_if.c:396) 
[   67.334384] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.334613] cleanup_net (net/core/net_namespace.c:630) 
[   67.334812] ? process_one_work (kernel/workqueue.c:2606) 
[   67.335032] process_one_work (kernel/workqueue.c:2633) 
[   67.335244] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.335443] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.335675] kthread (kernel/kthread.c:388) 
[   67.335848] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.336046] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.336239] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.336436] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.338975] ------------[ cut here ]------------
| [   67.339236] sysfs group 'bridge' not found for kobject 'br0'
| [   67.339545] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.339975] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.340732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.341327] Workqueue: netns cleanup_net
[   67.341538] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.341801] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   67.342743] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   67.343017] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   67.343382] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.343753] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   67.344120] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ca610
[   67.344485] R13: ffffaa568026be08 R14: ffff952cc29cab80 R15: ffffffffbb478f90
[   67.344860] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   67.345274] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.345569] CR2: 00007f4a6cb60000 CR3: 0000000036460005 CR4: 0000000000770ef0
[   67.345941] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.346309] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.346680] PKRU: 55555554
[   67.346826] Call Trace:
[   67.346962]  <TASK>
[   67.347079] ? __warn (kernel/panic.c:677) 
[   67.347260] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.347483] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.347690] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.347881] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.348087] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.348314] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.348539] br_dev_delete (net/bridge/br_if.c:396) 
[   67.348741] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.348978] cleanup_net (net/core/net_namespace.c:630) 
[   67.349174] ? process_one_work (kernel/workqueue.c:2606) 
[   67.349397] process_one_work (kernel/workqueue.c:2633) 
[   67.349613] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.349824] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.350055] kthread (kernel/kthread.c:388) 
[   67.350229] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.350430] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.350627] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.350836] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.353387] ------------[ cut here ]------------
| [   67.353630] sysfs group 'bridge' not found for kobject 'br0'
| [   67.353946] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.354361] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.355113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.355696] Workqueue: netns cleanup_net
[   67.355910] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.356162] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   67.357107] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   67.357381] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   67.357752] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.358119] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   67.358485] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d04610
[   67.358857] R13: ffffaa568026be08 R14: ffff952cc1d04b80 R15: ffffffffbb478f90
[   67.359228] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   67.359641] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.359944] CR2: 00007f4a6cb60000 CR3: 0000000036460005 CR4: 0000000000770ef0
[   67.360317] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.360690] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.361062] PKRU: 55555554
[   67.361208] Call Trace:
[   67.361343]  <TASK>
[   67.361462] ? __warn (kernel/panic.c:677) 
[   67.361642] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.361871] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.362071] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.362261] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.362466] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.362701] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.362925] br_dev_delete (net/bridge/br_if.c:396) 
[   67.363120] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.363355] cleanup_net (net/core/net_namespace.c:630) 
[   67.363552] ? process_one_work (kernel/workqueue.c:2606) 
[   67.363781] process_one_work (kernel/workqueue.c:2633) 
[   67.363998] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.364201] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.364430] kthread (kernel/kthread.c:388) 
[   67.364601] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.364809] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.365004] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.365206] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.324913] ------------[ cut here ]------------
| [   75.325387] sysfs group 'bridge' not found for kobject 'br0'
| [   75.325917] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.326646] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.327980] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.329010] Workqueue: netns cleanup_net
[   75.329376] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.329776] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   75.331302] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   75.331731] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   75.332335] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.332852] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   75.333226] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260a610
[   75.333705] R13: ffffaa568026be08 R14: ffff952cc260ab80 R15: ffff952cc39f1750
[   75.334200] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   75.334642] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.334954] CR2: 00007f4e777de000 CR3: 0000000036460002 CR4: 0000000000770ef0
[   75.335507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.335910] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.336459] PKRU: 55555554
[   75.336724] Call Trace:
[   75.336951]  <TASK>
[   75.337145] ? __warn (kernel/panic.c:677) 
[   75.337438] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.337838] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.338172] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.338493] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.338861] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.339228] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.339617] br_dev_delete (net/bridge/br_if.c:396) 
[   75.339959] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.340367] cleanup_net (net/core/net_namespace.c:630) 
[   75.340712] ? process_one_work (kernel/workqueue.c:2606) 
[   75.341091] process_one_work (kernel/workqueue.c:2633) 
[   75.341463] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.341827] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.342218] kthread (kernel/kthread.c:388) 
[   75.342468] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.342778] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.343106] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.343424] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.442850] ------------[ cut here ]------------
| [   75.443248] sysfs group 'bridge' not found for kobject 'br0'
| [   75.443770] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.444224] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.445160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.445736] Workqueue: netns cleanup_net
[   75.446048] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.446485] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   75.447910] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   75.448240] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   75.448850] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.449512] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   75.450195] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2608610
[   75.450837] R13: ffffaa568026be08 R14: ffff952cc2608b80 R15: ffff952cc39f0050
[   75.451484] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   75.452226] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.452748] CR2: 00007f4e777de000 CR3: 0000000036460002 CR4: 0000000000770ef0
[   75.453403] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.454053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.454502] PKRU: 55555554
[   75.454648] Call Trace:
[   75.454851]  <TASK>
[   75.454976] ? __warn (kernel/panic.c:677) 
[   75.455151] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.455370] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.455577] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.455842] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.456158] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.456463] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.456719] br_dev_delete (net/bridge/br_if.c:396) 
[   75.456995] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.457411] cleanup_net (net/core/net_namespace.c:630) 
[   75.457754] ? process_one_work (kernel/workqueue.c:2606) 
[   75.458149] process_one_work (kernel/workqueue.c:2633) 
[   75.458538] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.458895] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.459296] kthread (kernel/kthread.c:388) 
[   75.459593] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.459946] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.460278] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.460638] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.464863] ------------[ cut here ]------------
| [   75.465275] sysfs group 'bridge' not found for kobject 'br0'
| [   75.465803] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.466231] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.467147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.467883] Workqueue: netns cleanup_net
[   75.468190] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.468457] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   75.469978] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   75.470457] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   75.471144] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.471808] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   75.472458] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260c610
[   75.473118] R13: ffffaa568026be08 R14: ffff952cc260cb80 R15: ffff952cc39f0050
[   75.473749] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   75.474476] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.474939] CR2: 00007f4e777de000 CR3: 0000000036460002 CR4: 0000000000770ef0
[   75.475514] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.476145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.476754] PKRU: 55555554
[   75.476994] Call Trace:
[   75.477199]  <TASK>
[   75.477394] ? __warn (kernel/panic.c:677) 
[   75.477648] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.478023] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.478220] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.478423] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.478654] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.478915] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.479135] br_dev_delete (net/bridge/br_if.c:396) 
[   75.479327] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.479556] cleanup_net (net/core/net_namespace.c:630) 
[   75.479754] ? process_one_work (kernel/workqueue.c:2606) 
[   75.479973] process_one_work (kernel/workqueue.c:2633) 
[   75.480191] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.480388] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.480614] kthread (kernel/kthread.c:388) 
[   75.480788] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.481000] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.481190] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.481386] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.587844] ------------[ cut here ]------------
| [   75.588301] sysfs group 'bridge' not found for kobject 'br0'
| [   75.588869] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.589538] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.590780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.591704] Workqueue: netns cleanup_net
[   75.592001] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.592249] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   75.593455] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   75.593729] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   75.594198] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.594707] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   75.595219] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1936610
[   75.595874] R13: ffffaa568026be08 R14: ffff952cc1936b80 R15: ffff952cc3895c50
[   75.596512] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   75.597248] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.597819] CR2: 00007f4e777de000 CR3: 0000000036460002 CR4: 0000000000770ef0
[   75.598472] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.599141] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.599784] PKRU: 55555554
[   75.600060] Call Trace:
[   75.600300]  <TASK>
[   75.600500] ? __warn (kernel/panic.c:677) 
[   75.600796] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.601190] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.601486] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.601820] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.602161] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.602506] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.602862] br_dev_delete (net/bridge/br_if.c:396) 
[   75.603179] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.603563] cleanup_net (net/core/net_namespace.c:630) 
[   75.603886] ? process_one_work (kernel/workqueue.c:2606) 
[   75.604114] process_one_work (kernel/workqueue.c:2633) 
[   75.604350] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.604626] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.604859] kthread (kernel/kthread.c:388) 
[   75.605037] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.605236] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.605427] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.605624] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   83.543912] ------------[ cut here ]------------
| [   83.544385] sysfs group 'bridge' not found for kobject 'br0'
| [   83.544738] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   83.545545] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   83.547338] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   83.548778] Workqueue: netns cleanup_net
[   83.549245] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 83.549939] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   83.552139] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   83.552778] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   83.553488] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   83.554274] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   83.555077] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc21ba610
[   83.555866] R13: ffffaa568026be08 R14: ffff952cc21bab80 R15: ffff952cc3960050
[   83.556544] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[   83.557435] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.557803] CR2: 00007f9d371e7000 CR3: 0000000036460003 CR4: 0000000000770ef0
[   83.558241] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.558606] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.558988] PKRU: 55555554
[   83.559133] Call Trace:
[   83.559268]  <TASK>
[   83.559386] ? __warn (kernel/panic.c:677) 
[   83.559562] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.559803] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   83.560002] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   83.560190] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   83.560399] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   83.560627] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.560878] br_dev_delete (net/bridge/br_if.c:396) 
[   83.561074] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   83.561305] cleanup_net (net/core/net_namespace.c:630) 
[   83.561500] ? process_one_work (kernel/workqueue.c:2606) 
[   83.561750] process_one_work (kernel/workqueue.c:2633) 
[   83.561996] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   83.562196] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   83.562420] kthread (kernel/kthread.c:388) 
[   83.562599] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.562855] ret_from_fork (arch/x86/kernel/process.c:147) 
[   83.563049] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.563246] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   83.702913] ------------[ cut here ]------------
| [   83.703389] sysfs group 'bridge' not found for kobject 'br0'
| [   83.704027] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   83.704830] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   83.706293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   83.707449] Workqueue: netns cleanup_net
[   83.707904] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 83.708408] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   83.710428] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   83.710985] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   83.711610] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   83.712267] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   83.712931] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ca610
[   83.713631] R13: ffffaa568026be08 R14: ffff952cc29cab80 R15: ffff952cc3895c50
[   83.714018] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[   83.714540] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.714932] CR2: 00007fe2c56b51b4 CR3: 00000000025ce003 CR4: 0000000000770ef0
[   83.715483] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.715851] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.716340] PKRU: 55555554
[   83.716557] Call Trace:
[   83.716804]  <TASK>
[   83.717033] ? __warn (kernel/panic.c:677) 
[   83.717274] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.717512] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   83.717885] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   83.718194] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   83.718551] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   83.719007] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.719425] br_dev_delete (net/bridge/br_if.c:396) 
[   83.719835] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   83.720320] cleanup_net (net/core/net_namespace.c:630) 
[   83.720674] ? process_one_work (kernel/workqueue.c:2606) 
[   83.721166] process_one_work (kernel/workqueue.c:2633) 
[   83.721617] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   83.721962] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   83.722397] kthread (kernel/kthread.c:388) 
[   83.722736] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.723122] ret_from_fork (arch/x86/kernel/process.c:147) 
[   83.723481] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.723898] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   83.728727] ------------[ cut here ]------------
| [   83.729238] sysfs group 'bridge' not found for kobject 'br0'
| [   83.729788] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   83.730445] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   83.731844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   83.732452] Workqueue: netns cleanup_net
[   83.732748] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 83.733027] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   83.733961] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   83.734232] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   83.734594] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   83.734960] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   83.735324] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ce610
[   83.735691] R13: ffffaa568026be08 R14: ffff952cc29ceb80 R15: ffff952cc3895c50
[   83.736054] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   83.736461] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.736765] CR2: 000055d5779cfdec CR3: 0000000002808003 CR4: 0000000000770ef0
[   83.737131] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.737496] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.737865] PKRU: 55555554
[   83.738011] Call Trace:
[   83.738144]  <TASK>
[   83.738263] ? __warn (kernel/panic.c:677) 
[   83.738443] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.738680] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   83.738877] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   83.739065] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   83.739266] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   83.739492] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.739718] br_dev_delete (net/bridge/br_if.c:396) 
[   83.739911] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   83.740144] cleanup_net (net/core/net_namespace.c:630) 
[   83.740338] ? process_one_work (kernel/workqueue.c:2606) 
[   83.740557] process_one_work (kernel/workqueue.c:2633) 
[   83.740779] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   83.741098] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   83.741324] kthread (kernel/kthread.c:388) 
[   83.741492] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.741697] ret_from_fork (arch/x86/kernel/process.c:147) 
[   83.741889] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.742087] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   83.849961] ------------[ cut here ]------------
| [   83.850512] sysfs group 'bridge' not found for kobject 'br0'
| [   83.851463] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   83.852389] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   83.854771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   83.856702] Workqueue: netns cleanup_net
[   83.857320] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 83.858206] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   83.861446] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   83.862365] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   83.863026] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   83.863633] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   83.864202] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc21bc610
[   83.865044] R13: ffffaa568026be08 R14: ffff952cc21bcb80 R15: ffff952cc3961750
[   83.865871] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   83.867144] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.868118] CR2: 000055d578a1dd40 CR3: 0000000036460006 CR4: 0000000000770ef0
[   83.869285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.870552] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.871430] PKRU: 55555554
[   83.871692] Call Trace:
[   83.872002]  <TASK>
[   83.872213] ? __warn (kernel/panic.c:677) 
[   83.872587] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.873054] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   83.873520] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   83.873894] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   83.874390] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   83.874747] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.875246] br_dev_delete (net/bridge/br_if.c:396) 
[   83.875744] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   83.876214] cleanup_net (net/core/net_namespace.c:630) 
[   83.876519] ? process_one_work (kernel/workqueue.c:2606) 
[   83.876915] process_one_work (kernel/workqueue.c:2633) 
[   83.877208] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   83.877535] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   83.877929] kthread (kernel/kthread.c:388) 
[   83.878247] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.878621] ret_from_fork (arch/x86/kernel/process.c:147) 
[   83.878966] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.879360] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.137943] ------------[ cut here ]------------
| [   92.138220] sysfs group 'bridge' not found for kobject 'br0'
| [   92.138588] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.139045] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.139872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.140526] Workqueue: netns cleanup_net
[   92.140769] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.141070] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   92.142121] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   92.142452] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   92.142865] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.143260] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   92.143693] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfc610
[   92.144106] R13: ffffaa568026be08 R14: ffff952cc4bfcb80 R15: ffff952cc3964550
[   92.144523] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   92.144974] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.145285] CR2: 00007f8dc527d000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   92.145686] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.146089] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.146476] PKRU: 55555554
[   92.146634] Call Trace:
[   92.146828]  <TASK>
[   92.146990] ? __warn (kernel/panic.c:677) 
[   92.147197] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.147450] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.147700] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.147961] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.148191] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.148433] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.148691] br_dev_delete (net/bridge/br_if.c:396) 
[   92.148933] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.149198] cleanup_net (net/core/net_namespace.c:630) 
[   92.149412] ? process_one_work (kernel/workqueue.c:2606) 
[   92.149674] process_one_work (kernel/workqueue.c:2633) 
[   92.149933] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.150166] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.150416] kthread (kernel/kthread.c:388) 
[   92.150620] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.150878] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.151102] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.151317] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.229881] ------------[ cut here ]------------
| [   92.230179] sysfs group 'bridge' not found for kobject 'br0'
| [   92.230523] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.230975] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.231823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.232443] Workqueue: netns cleanup_net
[   92.232699] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.232970] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   92.233941] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   92.234287] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   92.234689] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.235088] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   92.235518] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b4610
[   92.235968] R13: ffffaa568026be08 R14: ffff952cc49b4b80 R15: ffff952cc3960050
[   92.236369] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[   92.236814] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.237163] CR2: 00007f8dc527d000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   92.237559] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.237972] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.238367] PKRU: 55555554
[   92.238529] Call Trace:
[   92.238725]  <TASK>
[   92.238892] ? __warn (kernel/panic.c:677) 
[   92.239113] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.239347] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.239608] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.239842] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.240071] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.240314] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.240576] br_dev_delete (net/bridge/br_if.c:396) 
[   92.240832] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.241097] cleanup_net (net/core/net_namespace.c:630) 
[   92.241316] ? process_one_work (kernel/workqueue.c:2606) 
[   92.241582] process_one_work (kernel/workqueue.c:2633) 
[   92.241859] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.242089] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.242340] kthread (kernel/kthread.c:388) 
[   92.242545] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.242802] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.243045] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.243263] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.341847] ------------[ cut here ]------------
| [   92.342257] sysfs group 'bridge' not found for kobject 'br0'
| [   92.342780] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.343433] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.344418] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.345093] Workqueue: netns cleanup_net
[   92.345306] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.345556] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   92.346492] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   92.346781] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   92.347145] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.347507] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   92.347878] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b2610
[   92.348260] R13: ffffaa568026be08 R14: ffff952cc49b2b80 R15: ffffffffbb478f90
[   92.348623] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   92.349037] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.349333] CR2: 00007ff6671f6000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   92.349702] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.350066] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.350428] PKRU: 55555554
[   92.350572] Call Trace:
[   92.350722]  <TASK>
[   92.350854] ? __warn (kernel/panic.c:677) 
[   92.351030] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.351249] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.351445] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.351632] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.351841] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.352066] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.352287] br_dev_delete (net/bridge/br_if.c:396) 
[   92.352481] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.352722] cleanup_net (net/core/net_namespace.c:630) 
[   92.352917] ? process_one_work (kernel/workqueue.c:2606) 
[   92.353138] process_one_work (kernel/workqueue.c:2633) 
[   92.353352] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.353551] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.353783] kthread (kernel/kthread.c:388) 
[   92.353956] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.354155] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.354349] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.354546] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.357088] ------------[ cut here ]------------
| [   92.357327] sysfs group 'bridge' not found for kobject 'br0'
| [   92.357634] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.358049] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.358808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.359383] Workqueue: netns cleanup_net
[   92.359590] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.359844] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   92.360787] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[   92.361065] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[   92.361428] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.361806] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[   92.362168] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a64610
[   92.362533] R13: ffffaa568026be08 R14: ffff952cc2a64b80 R15: ffffffffbb478f90
[   92.362901] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[   92.363308] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.363603] CR2: 00007ff6671f6000 CR3: 0000000036460001 CR4: 0000000000770ef0
[   92.363972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.364342] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.364710] PKRU: 55555554
[   92.364855] Call Trace:
[   92.364988]  <TASK>
[   92.365106] ? __warn (kernel/panic.c:677) 
[   92.365282] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.365500] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.365702] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.365890] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.366094] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.366318] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.366537] br_dev_delete (net/bridge/br_if.c:396) 
[   92.366736] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.366979] cleanup_net (net/core/net_namespace.c:630) 
[   92.367173] ? process_one_work (kernel/workqueue.c:2606) 
[   92.367392] process_one_work (kernel/workqueue.c:2633) 
[   92.367606] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.367810] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.368035] kthread (kernel/kthread.c:388) 
[   92.368204] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.368405] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.368597] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.368802] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  100.539886] ------------[ cut here ]------------
| [  100.540169] sysfs group 'bridge' not found for kobject 'br0'
| [  100.540494] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  100.540980] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  100.541849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  100.542449] Workqueue: netns cleanup_net
[  100.542704] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 100.543015] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  100.544000] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  100.544288] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  100.544686] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  100.545096] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  100.545490] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ac610
[  100.545872] R13: ffffaa568026be08 R14: ffff952cc55acb80 R15: ffff952cc3961750
[  100.546300] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  100.546748] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.547069] CR2: 00007fff9ffa6588 CR3: 0000000002808005 CR4: 0000000000770ef0
[  100.547476] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  100.547868] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  100.548260] PKRU: 55555554
[  100.548423] Call Trace:
[  100.548595]  <TASK>
[  100.548748] ? __warn (kernel/panic.c:677) 
[  100.548951] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.549200] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  100.549409] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  100.549662] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  100.549898] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  100.550142] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.550372] br_dev_delete (net/bridge/br_if.c:396) 
[  100.550591] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  100.550918] cleanup_net (net/core/net_namespace.c:630) 
[  100.551136] ? process_one_work (kernel/workqueue.c:2606) 
[  100.551369] process_one_work (kernel/workqueue.c:2633) 
[  100.551608] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  100.551862] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  100.552122] kthread (kernel/kthread.c:388) 
[  100.552306] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.552543] ret_from_fork (arch/x86/kernel/process.c:147) 
[  100.552771] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.553028] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  100.674883] ------------[ cut here ]------------
| [  100.675395] sysfs group 'bridge' not found for kobject 'br0'
| [  100.675754] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  100.676248] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  100.677244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  100.677849] Workqueue: netns cleanup_net
[  100.678137] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 100.678564] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  100.679934] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  100.680423] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  100.681080] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  100.681740] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  100.682372] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ae610
[  100.683057] R13: ffffaa568026be08 R14: ffff952cc55aeb80 R15: ffff952cc3965c50
[  100.683717] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  100.684469] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.685005] CR2: 00007faa4c87f000 CR3: 0000000036460003 CR4: 0000000000770ef0
[  100.685610] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  100.686216] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  100.686848] PKRU: 55555554
[  100.687070] Call Trace:
[  100.687296]  <TASK>
[  100.687469] ? __warn (kernel/panic.c:677) 
[  100.687772] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.688113] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  100.688456] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  100.688675] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  100.688881] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  100.689133] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.689400] br_dev_delete (net/bridge/br_if.c:396) 
[  100.689694] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  100.689980] cleanup_net (net/core/net_namespace.c:630) 
[  100.690180] ? process_one_work (kernel/workqueue.c:2606) 
[  100.690411] process_one_work (kernel/workqueue.c:2633) 
[  100.690675] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  100.691037] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  100.691515] kthread (kernel/kthread.c:388) 
[  100.691957] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.692332] ret_from_fork (arch/x86/kernel/process.c:147) 
[  100.692846] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.693258] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  100.700591] ------------[ cut here ]------------
| [  100.700888] sysfs group 'bridge' not found for kobject 'br0'
| [  100.701232] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  100.701699] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  100.702509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  100.703129] Workqueue: netns cleanup_net
[  100.703371] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 100.703646] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  100.704614] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  100.704892] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  100.705256] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  100.705624] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  100.706033] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2a610
[  100.706467] R13: ffffaa568026be08 R14: ffff952cc3a2ab80 R15: ffff952cc3965c50
[  100.706861] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  100.707295] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.707617] CR2: 000055d578a331e0 CR3: 0000000036460004 CR4: 0000000000770ef0
[  100.708032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  100.708437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  100.708835] PKRU: 55555554
[  100.708997] Call Trace:
[  100.709163]  <TASK>
[  100.709346] ? __warn (kernel/panic.c:677) 
[  100.709543] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.709793] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  100.709992] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  100.710212] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  100.710480] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  100.710737] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.710997] br_dev_delete (net/bridge/br_if.c:396) 
[  100.711235] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  100.711507] cleanup_net (net/core/net_namespace.c:630) 
[  100.711747] ? process_one_work (kernel/workqueue.c:2606) 
[  100.711998] process_one_work (kernel/workqueue.c:2633) 
[  100.712226] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  100.712464] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  100.712734] kthread (kernel/kthread.c:388) 
[  100.712943] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.713155] ret_from_fork (arch/x86/kernel/process.c:147) 
[  100.713379] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.713618] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  100.834847] ------------[ cut here ]------------
| [  100.835097] sysfs group 'bridge' not found for kobject 'br0'
| [  100.835416] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  100.835876] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  100.836696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  100.837302] Workqueue: netns cleanup_net
[  100.837540] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 100.837826] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  100.838805] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  100.839108] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  100.839491] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  100.839883] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  100.840290] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b82610
[  100.840678] R13: ffffaa568026be08 R14: ffff952cc4b82b80 R15: ffff952cc2b61750
[  100.841077] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  100.841524] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.841879] CR2: 000055d578a331e0 CR3: 0000000036460004 CR4: 0000000000770ef0
[  100.842266] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  100.842649] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  100.843053] PKRU: 55555554
[  100.843229] Call Trace:
[  100.843395]  <TASK>
[  100.843535] ? __warn (kernel/panic.c:677) 
[  100.843742] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.844015] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  100.844248] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  100.844467] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  100.844694] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  100.844963] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  100.845227] br_dev_delete (net/bridge/br_if.c:396) 
[  100.845456] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  100.845715] cleanup_net (net/core/net_namespace.c:630) 
[  100.845944] ? process_one_work (kernel/workqueue.c:2606) 
[  100.846194] process_one_work (kernel/workqueue.c:2633) 
[  100.846434] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  100.846652] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  100.846910] kthread (kernel/kthread.c:388) 
[  100.847115] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.847347] ret_from_fork (arch/x86/kernel/process.c:147) 
[  100.847559] ? __pfx_kthread (kernel/kthread.c:341) 
[  100.847792] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.093917] ------------[ cut here ]------------
| [  108.094283] sysfs group 'bridge' not found for kobject 'br0'
| [  108.094593] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.095144] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.096184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.097233] Workqueue: netns cleanup_net
[  108.097623] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.098114] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  108.099891] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  108.100407] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  108.101110] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  108.101739] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  108.102343] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2a610
[  108.102970] R13: ffffaa568026be08 R14: ffff952cc3a2ab80 R15: ffff952cc3962e50
[  108.103626] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  108.104356] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.104658] CR2: 00007f9dcfeba000 CR3: 00000000025ce003 CR4: 0000000000770ef0
[  108.105059] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.105421] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.105787] PKRU: 55555554
[  108.105932] Call Trace:
[  108.106067]  <TASK>
[  108.106185] ? __warn (kernel/panic.c:677) 
[  108.106361] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.106582] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  108.106786] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  108.107028] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  108.107331] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  108.107685] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.108017] br_dev_delete (net/bridge/br_if.c:396) 
[  108.108310] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  108.108674] cleanup_net (net/core/net_namespace.c:630) 
[  108.108963] ? process_one_work (kernel/workqueue.c:2606) 
[  108.109280] process_one_work (kernel/workqueue.c:2633) 
[  108.109593] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  108.109898] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  108.110228] kthread (kernel/kthread.c:388) 
[  108.110479] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.110790] ret_from_fork (arch/x86/kernel/process.c:147) 
[  108.111071] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.111362] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.263852] ------------[ cut here ]------------
| [  108.264109] sysfs group 'bridge' not found for kobject 'br0'
| [  108.264422] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.264853] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.265596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.266177] Workqueue: netns cleanup_net
[  108.266388] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.266636] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  108.267559] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  108.267837] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  108.268198] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  108.268556] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  108.268924] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55aa610
[  108.269290] R13: ffffaa568026be08 R14: ffff952cc55aab80 R15: ffffffffbb478f90
[  108.269663] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  108.270073] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.270365] CR2: 00007f9dcfeba000 CR3: 00000000025ce003 CR4: 0000000000770ef0
[  108.270745] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.271107] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.271466] PKRU: 55555554
[  108.271609] Call Trace:
[  108.271749]  <TASK>
[  108.271868] ? __warn (kernel/panic.c:677) 
[  108.272043] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.272259] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  108.272454] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  108.272640] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  108.272853] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  108.273081] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.273301] br_dev_delete (net/bridge/br_if.c:396) 
[  108.273493] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  108.273733] cleanup_net (net/core/net_namespace.c:630) 
[  108.273928] ? process_one_work (kernel/workqueue.c:2606) 
[  108.274148] process_one_work (kernel/workqueue.c:2633) 
[  108.274359] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  108.274557] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  108.274788] kthread (kernel/kthread.c:388) 
[  108.274959] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.275157] ret_from_fork (arch/x86/kernel/process.c:147) 
[  108.275349] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.275545] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.278117] ------------[ cut here ]------------
| [  108.278396] sysfs group 'bridge' not found for kobject 'br0'
| [  108.278749] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.279171] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.279992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.280577] Workqueue: netns cleanup_net
[  108.280841] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.281121] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  108.282069] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  108.282345] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  108.282711] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  108.283079] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  108.283462] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ae610
[  108.283868] R13: ffffaa568026be08 R14: ffff952cc55aeb80 R15: ffffffffbb478f90
[  108.284256] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  108.284714] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.285062] CR2: 00007f9530e16000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  108.285450] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.285864] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.286249] PKRU: 55555554
[  108.286394] Call Trace:
[  108.286527]  <TASK>
[  108.286644] ? __warn (kernel/panic.c:677) 
[  108.286837] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.287056] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  108.287252] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  108.287438] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  108.287647] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  108.287899] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.288117] br_dev_delete (net/bridge/br_if.c:396) 
[  108.288307] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  108.288538] cleanup_net (net/core/net_namespace.c:630) 
[  108.288743] ? process_one_work (kernel/workqueue.c:2606) 
[  108.288979] process_one_work (kernel/workqueue.c:2633) 
[  108.289193] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  108.289391] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  108.289614] kthread (kernel/kthread.c:388) 
[  108.289816] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.290022] ret_from_fork (arch/x86/kernel/process.c:147) 
[  108.290240] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.290439] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  108.293028] ------------[ cut here ]------------
| [  108.293264] sysfs group 'bridge' not found for kobject 'br0'
| [  108.293585] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  108.294029] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  108.294782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  108.295352] Workqueue: netns cleanup_net
[  108.295561] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 108.295822] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  108.296757] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  108.297042] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  108.297400] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  108.297777] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  108.298140] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[  108.298499] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffffffffbb478f90
[  108.298866] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  108.299272] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.299564] CR2: 00007f9530e16000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  108.299931] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  108.300292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  108.300649] PKRU: 55555554
[  108.300837] Call Trace:
[  108.300970]  <TASK>
[  108.301088] ? __warn (kernel/panic.c:677) 
[  108.301262] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.301479] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  108.301680] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  108.301866] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  108.302067] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  108.302294] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  108.302511] br_dev_delete (net/bridge/br_if.c:396) 
[  108.302720] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  108.302977] cleanup_net (net/core/net_namespace.c:630) 
[  108.303202] ? process_one_work (kernel/workqueue.c:2606) 
[  108.303449] process_one_work (kernel/workqueue.c:2633) 
[  108.303674] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  108.303887] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  108.304134] kthread (kernel/kthread.c:388) 
[  108.304303] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.304517] ret_from_fork (arch/x86/kernel/process.c:147) 
[  108.304722] ? __pfx_kthread (kernel/kthread.c:341) 
[  108.304954] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  115.840861] ------------[ cut here ]------------
| [  115.841130] sysfs group 'bridge' not found for kobject 'br0'
| [  115.841468] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  115.841916] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  115.842733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  115.843337] Workqueue: netns cleanup_net
[  115.843593] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 115.843879] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  115.844846] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  115.845147] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  115.845552] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  115.845955] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  115.846333] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2c610
[  115.846734] R13: ffffaa568026be08 R14: ffff952cc3a2cb80 R15: ffff952cc2b65c50
[  115.847134] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  115.847579] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  115.847895] CR2: 00007fff9ffa6588 CR3: 0000000002808002 CR4: 0000000000770ef0
[  115.848290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  115.848699] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  115.849088] PKRU: 55555554
[  115.849249] Call Trace:
[  115.849414]  <TASK>
[  115.849570] ? __warn (kernel/panic.c:677) 
[  115.849784] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.850021] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  115.850252] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  115.850474] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  115.850731] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  115.850982] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.851232] br_dev_delete (net/bridge/br_if.c:396) 
[  115.851467] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  115.851732] cleanup_net (net/core/net_namespace.c:630) 
[  115.851944] ? process_one_work (kernel/workqueue.c:2606) 
[  115.852204] process_one_work (kernel/workqueue.c:2633) 
[  115.852453] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  115.852688] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  115.852926] kthread (kernel/kthread.c:388) 
[  115.853121] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.853355] ret_from_fork (arch/x86/kernel/process.c:147) 
[  115.853574] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.853795] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  115.964891] ------------[ cut here ]------------
| [  115.965174] sysfs group 'bridge' not found for kobject 'br0'
| [  115.965522] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  115.965997] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  115.966799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  115.967424] Workqueue: netns cleanup_net
[  115.967672] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 115.967958] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  115.968940] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  115.969233] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  115.969644] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  115.970052] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  115.970452] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260c610
[  115.970890] R13: ffffaa568026be08 R14: ffff952cc260cb80 R15: ffff952cc39f4550
[  115.971275] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  115.971731] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  115.972068] CR2: 00007fff9ffa65b8 CR3: 0000000036460001 CR4: 0000000000770ef0
[  115.972465] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  115.972863] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  115.973273] PKRU: 55555554
[  115.973449] Call Trace:
[  115.973619]  <TASK>
[  115.973776] ? __warn (kernel/panic.c:677) 
[  115.973969] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.974198] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  115.974428] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  115.974664] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  115.974900] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  115.975142] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.975394] br_dev_delete (net/bridge/br_if.c:396) 
[  115.975639] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  115.975910] cleanup_net (net/core/net_namespace.c:630) 
[  115.976127] ? process_one_work (kernel/workqueue.c:2606) 
[  115.976376] process_one_work (kernel/workqueue.c:2633) 
[  115.976617] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  115.976858] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  115.977109] kthread (kernel/kthread.c:388) 
[  115.977293] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.977526] ret_from_fork (arch/x86/kernel/process.c:147) 
[  115.977775] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.977996] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  115.980820] ------------[ cut here ]------------
| [  115.981097] sysfs group 'bridge' not found for kobject 'br0'
| [  115.981441] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  115.981906] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  115.982724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  115.983339] Workqueue: netns cleanup_net
[  115.983573] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 115.983845] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  115.984827] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  115.985129] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  115.985524] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  115.985927] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  115.986326] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e0610
[  115.986744] R13: ffffaa568026be08 R14: ffff952cc49e0b80 R15: ffff952cc39f4550
[  115.987132] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  115.987558] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  115.987896] CR2: 00007fff9ffa65b8 CR3: 0000000036460001 CR4: 0000000000770ef0
[  115.988297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  115.988698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  115.989076] PKRU: 55555554
[  115.989253] Call Trace:
[  115.989422]  <TASK>
[  115.989573] ? __warn (kernel/panic.c:677) 
[  115.989779] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.990033] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  115.990275] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  115.990487] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  115.990729] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  115.990984] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  115.991236] br_dev_delete (net/bridge/br_if.c:396) 
[  115.991460] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  115.991716] cleanup_net (net/core/net_namespace.c:630) 
[  115.991947] ? process_one_work (kernel/workqueue.c:2606) 
[  115.992208] process_one_work (kernel/workqueue.c:2633) 
[  115.992448] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  115.992676] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  115.992927] kthread (kernel/kthread.c:388) 
[  115.993130] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.993361] ret_from_fork (arch/x86/kernel/process.c:147) 
[  115.993566] ? __pfx_kthread (kernel/kthread.c:341) 
[  115.993805] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  116.126871] ------------[ cut here ]------------
| [  116.127145] sysfs group 'bridge' not found for kobject 'br0'
| [  116.127493] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  116.127945] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  116.128743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  116.129342] Workqueue: netns cleanup_net
[  116.129594] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 116.129871] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  116.130844] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  116.131156] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  116.131549] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  116.131952] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  116.132342] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1d04610
[  116.132729] R13: ffffaa568026be08 R14: ffff952cc1d04b80 R15: ffff952cc3892e50
[  116.133121] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  116.133555] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  116.133910] CR2: 00007fff9ffa65b8 CR3: 0000000036460001 CR4: 0000000000770ef0
[  116.134294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  116.134689] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  116.135103] PKRU: 55555554
[  116.135275] Call Trace:
[  116.135448]  <TASK>
[  116.135593] ? __warn (kernel/panic.c:677) 
[  116.135790] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.136040] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  116.136263] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  116.136500] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  116.136736] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  116.136984] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.137232] br_dev_delete (net/bridge/br_if.c:396) 
[  116.137453] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  116.137727] cleanup_net (net/core/net_namespace.c:630) 
[  116.137946] ? process_one_work (kernel/workqueue.c:2606) 
[  116.138180] process_one_work (kernel/workqueue.c:2633) 
[  116.138421] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  116.138675] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  116.138931] kthread (kernel/kthread.c:388) 
[  116.139121] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.139340] ret_from_fork (arch/x86/kernel/process.c:147) 
[  116.139553] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.139795] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.651886] ------------[ cut here ]------------
| [  123.652239] sysfs group 'bridge' not found for kobject 'br0'
| [  123.652768] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.653539] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.654988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.656230] Workqueue: netns cleanup_net
[  123.656621] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.657067] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  123.658763] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  123.659193] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  123.659821] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  123.660414] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  123.660966] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ce610
[  123.661595] R13: ffffaa568026be08 R14: ffff952cc29ceb80 R15: ffff952cc2b65c50
[  123.661970] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  123.662477] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.662857] CR2: 00007f07528cb270 CR3: 0000000036460002 CR4: 0000000000770ef0
[  123.663384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.663752] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.664173] PKRU: 55555554
[  123.664359] Call Trace:
[  123.664571]  <TASK>
[  123.664765] ? __warn (kernel/panic.c:677) 
[  123.664947] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.665164] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  123.665463] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  123.665733] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  123.666057] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  123.666432] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.666806] br_dev_delete (net/bridge/br_if.c:396) 
[  123.667119] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  123.667504] cleanup_net (net/core/net_namespace.c:630) 
[  123.667828] ? process_one_work (kernel/workqueue.c:2606) 
[  123.668185] process_one_work (kernel/workqueue.c:2633) 
[  123.668534] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  123.668847] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  123.669224] kthread (kernel/kthread.c:388) 
[  123.669503] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.669829] ret_from_fork (arch/x86/kernel/process.c:147) 
[  123.670138] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.670466] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.798882] ------------[ cut here ]------------
| [  123.799366] sysfs group 'bridge' not found for kobject 'br0'
| [  123.799992] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.800859] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.802308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.803006] Workqueue: netns cleanup_net
[  123.803221] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.803499] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  123.804925] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  123.805417] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  123.806159] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  123.806916] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  123.807668] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e0610
[  123.808478] R13: ffffaa568026be08 R14: ffff952cc49e0b80 R15: ffff952cc3892e50
[  123.809291] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  123.810180] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.810854] CR2: 00007f07528cb270 CR3: 0000000036460002 CR4: 0000000000770ef0
[  123.811619] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.812349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.813015] PKRU: 55555554
[  123.813331] Call Trace:
[  123.813560]  <TASK>
[  123.813780] ? __warn (kernel/panic.c:677) 
[  123.814108] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.814509] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  123.814890] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  123.815269] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  123.815690] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  123.816153] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.816389] br_dev_delete (net/bridge/br_if.c:396) 
[  123.816644] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  123.816977] cleanup_net (net/core/net_namespace.c:630) 
[  123.817367] ? process_one_work (kernel/workqueue.c:2606) 
[  123.817636] process_one_work (kernel/workqueue.c:2633) 
[  123.817902] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  123.818196] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  123.818611] kthread (kernel/kthread.c:388) 
[  123.818897] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.819178] ret_from_fork (arch/x86/kernel/process.c:147) 
[  123.819504] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.819970] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.825361] ------------[ cut here ]------------
| [  123.826050] sysfs group 'bridge' not found for kobject 'br0'
| [  123.826807] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.827667] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.829346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.830551] Workqueue: netns cleanup_net
[  123.830993] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.831487] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  123.833084] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  123.833465] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  123.833884] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  123.834244] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  123.834601] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[  123.834970] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc3892e50
[  123.835332] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  123.835748] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.836040] CR2: 000055d5779cfdec CR3: 0000000002808005 CR4: 0000000000770ef0
[  123.836409] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.836777] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.837136] PKRU: 55555554
[  123.837279] Call Trace:
[  123.837412]  <TASK>
[  123.837529] ? __warn (kernel/panic.c:677) 
[  123.837711] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.837927] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  123.838128] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  123.838314] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  123.838516] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  123.838747] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.838965] br_dev_delete (net/bridge/br_if.c:396) 
[  123.839158] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  123.839387] cleanup_net (net/core/net_namespace.c:630) 
[  123.839578] ? process_one_work (kernel/workqueue.c:2606) 
[  123.839806] process_one_work (kernel/workqueue.c:2633) 
[  123.840017] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  123.840213] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  123.840435] kthread (kernel/kthread.c:388) 
[  123.840604] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.840821] ret_from_fork (arch/x86/kernel/process.c:147) 
[  123.841011] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.841207] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  123.948868] ------------[ cut here ]------------
| [  123.949152] sysfs group 'bridge' not found for kobject 'br0'
| [  123.949564] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  123.950019] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  123.950815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  123.951825] Workqueue: netns cleanup_net
[  123.952048] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 123.952484] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  123.954191] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  123.954743] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  123.955465] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  123.956125] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  123.956827] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e6610
[  123.957509] R13: ffffaa568026be08 R14: ffff952cc49e6b80 R15: ffff952cc39f4550
[  123.958187] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  123.958996] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.959521] CR2: 000055d5789b53b0 CR3: 0000000036460004 CR4: 0000000000770ef0
[  123.960156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.960849] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.961504] PKRU: 55555554
[  123.961766] Call Trace:
[  123.962019]  <TASK>
[  123.962215] ? __warn (kernel/panic.c:677) 
[  123.962476] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.962825] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  123.963182] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  123.963457] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  123.963807] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  123.964216] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  123.964612] br_dev_delete (net/bridge/br_if.c:396) 
[  123.964885] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  123.965308] cleanup_net (net/core/net_namespace.c:630) 
[  123.965616] ? process_one_work (kernel/workqueue.c:2606) 
[  123.965940] process_one_work (kernel/workqueue.c:2633) 
[  123.966313] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  123.966636] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  123.966973] kthread (kernel/kthread.c:388) 
[  123.967251] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.967577] ret_from_fork (arch/x86/kernel/process.c:147) 
[  123.967785] ? __pfx_kthread (kernel/kthread.c:341) 
[  123.968016] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  131.613887] ------------[ cut here ]------------
| [  131.614357] sysfs group 'bridge' not found for kobject 'br0'
| [  131.614832] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  131.615568] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  131.616625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  131.617337] Workqueue: netns cleanup_net
[  131.617650] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 131.617958] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  131.619122] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  131.619579] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  131.620139] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  131.620673] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  131.621313] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1934610
[  131.622033] R13: ffffaa568026be08 R14: ffff952cc1934b80 R15: ffff952cc2b60050
[  131.622753] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  131.623586] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  131.624157] CR2: 00007f7f7acbd000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  131.624874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  131.625599] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  131.626271] PKRU: 55555554
[  131.626552] Call Trace:
[  131.626825]  <TASK>
[  131.627054] ? __warn (kernel/panic.c:677) 
[  131.627381] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.627817] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  131.628211] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  131.628540] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  131.628922] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  131.629356] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.629709] br_dev_delete (net/bridge/br_if.c:396) 
[  131.630049] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  131.630452] cleanup_net (net/core/net_namespace.c:630) 
[  131.630846] ? process_one_work (kernel/workqueue.c:2606) 
[  131.631243] process_one_work (kernel/workqueue.c:2633) 
[  131.631639] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  131.631948] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  131.632345] kthread (kernel/kthread.c:388) 
[  131.632605] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.633000] ret_from_fork (arch/x86/kernel/process.c:147) 
[  131.633302] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.633673] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  131.731819] ------------[ cut here ]------------
| [  131.732294] sysfs group 'bridge' not found for kobject 'br0'
| [  131.732814] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  131.733610] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  131.734538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  131.735420] Workqueue: netns cleanup_net
[  131.735629] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 131.735884] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  131.737244] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  131.737557] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  131.738158] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  131.738949] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  131.739667] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfc610
[  131.740431] R13: ffffaa568026be08 R14: ffff952cc4bfcb80 R15: ffff952cc39f4550
[  131.741192] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  131.742204] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  131.742912] CR2: 00007f7f7acbd000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  131.743620] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  131.744279] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  131.744974] PKRU: 55555554
[  131.745274] Call Trace:
[  131.745508]  <TASK>
[  131.745739] ? __warn (kernel/panic.c:677) 
[  131.746071] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.746426] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  131.746804] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  131.747151] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  131.747536] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  131.747896] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.748350] br_dev_delete (net/bridge/br_if.c:396) 
[  131.748676] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  131.749092] cleanup_net (net/core/net_namespace.c:630) 
[  131.749399] ? process_one_work (kernel/workqueue.c:2606) 
[  131.749832] process_one_work (kernel/workqueue.c:2633) 
[  131.750189] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  131.750569] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  131.750823] kthread (kernel/kthread.c:388) 
[  131.751029] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.751243] ret_from_fork (arch/x86/kernel/process.c:147) 
[  131.751483] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.751797] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  131.755695] ------------[ cut here ]------------
| [  131.755943] sysfs group 'bridge' not found for kobject 'br0'
| [  131.756417] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  131.757171] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  131.758660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  131.759794] Workqueue: netns cleanup_net
[  131.760169] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 131.760720] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  131.762649] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  131.763186] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  131.763871] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  131.764601] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  131.765099] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[  131.765565] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc39f4550
[  131.765931] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  131.766338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  131.766629] CR2: 00007f7f7acbd000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  131.767220] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  131.767742] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  131.768147] PKRU: 55555554
[  131.768388] Call Trace:
[  131.768591]  <TASK>
[  131.768803] ? __warn (kernel/panic.c:677) 
[  131.769093] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.769504] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  131.769860] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  131.770204] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  131.770622] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  131.771048] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.771441] br_dev_delete (net/bridge/br_if.c:396) 
[  131.771802] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  131.772229] cleanup_net (net/core/net_namespace.c:630) 
[  131.772593] ? process_one_work (kernel/workqueue.c:2606) 
[  131.773282] process_one_work (kernel/workqueue.c:2633) 
[  131.773941] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  131.774343] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  131.774740] kthread (kernel/kthread.c:388) 
[  131.775049] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.775438] ret_from_fork (arch/x86/kernel/process.c:147) 
[  131.775801] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.776150] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  131.898870] ------------[ cut here ]------------
| [  131.899324] sysfs group 'bridge' not found for kobject 'br0'
| [  131.899904] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  131.900592] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  131.901895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  131.902966] Workqueue: netns cleanup_net
[  131.903344] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 131.903759] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  131.905211] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  131.905525] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  131.906014] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  131.906540] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  131.906991] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2e610
[  131.907355] R13: ffffaa568026be08 R14: ffff952cc3a2eb80 R15: ffff952cc2b62e50
[  131.907829] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  131.908514] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  131.908851] CR2: 00007f7f7acbd000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  131.909524] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  131.910235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  131.910982] PKRU: 55555554
[  131.911244] Call Trace:
[  131.911490]  <TASK>
[  131.911707] ? __warn (kernel/panic.c:677) 
[  131.912076] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.912508] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  131.912905] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  131.913261] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  131.913639] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  131.914064] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  131.914499] br_dev_delete (net/bridge/br_if.c:396) 
[  131.914888] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  131.915329] cleanup_net (net/core/net_namespace.c:630) 
[  131.915678] ? process_one_work (kernel/workqueue.c:2606) 
[  131.916104] process_one_work (kernel/workqueue.c:2633) 
[  131.916520] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  131.916912] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  131.917319] kthread (kernel/kthread.c:388) 
[  131.917665] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.918006] ret_from_fork (arch/x86/kernel/process.c:147) 
[  131.918359] ? __pfx_kthread (kernel/kthread.c:341) 
[  131.918727] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.215873] ------------[ cut here ]------------
| [  142.216355] sysfs group 'bridge' not found for kobject 'br0'
| [  142.216982] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.217799] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.219231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.220353] Workqueue: netns cleanup_net
[  142.220752] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.221241] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  142.223010] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  142.223572] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  142.224195] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.224879] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  142.225603] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a62610
[  142.226236] R13: ffffaa568026be08 R14: ffff952cc2a62b80 R15: ffff952cc2b60050
[  142.226886] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  142.227620] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.228203] CR2: 00007fff9ffa6588 CR3: 0000000002808002 CR4: 0000000000770ef0
[  142.228569] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.229083] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.229589] PKRU: 55555554
[  142.229783] Call Trace:
[  142.230061]  <TASK>
[  142.230225] ? __warn (kernel/panic.c:677) 
[  142.230401] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.230631] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.230841] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.231106] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.231435] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.231856] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.232074] br_dev_delete (net/bridge/br_if.c:396) 
[  142.232443] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.232837] cleanup_net (net/core/net_namespace.c:630) 
[  142.233266] ? process_one_work (kernel/workqueue.c:2606) 
[  142.233720] process_one_work (kernel/workqueue.c:2633) 
[  142.234166] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.234633] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.235103] kthread (kernel/kthread.c:388) 
[  142.235490] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.235963] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.236364] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.236793] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.386967] ------------[ cut here ]------------
| [  142.387682] sysfs group 'bridge' not found for kobject 'br0'
| [  142.388540] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.389681] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.391805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.393313] Workqueue: netns cleanup_net
[  142.393798] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.394417] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  142.396687] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  142.397218] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  142.397800] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.398445] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  142.399011] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ce610
[  142.399561] R13: ffffaa568026be08 R14: ffff952cc29ceb80 R15: ffffffffbb478f90
[  142.400108] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  142.400631] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.400935] CR2: 00007fff9ffa6588 CR3: 0000000036460001 CR4: 0000000000770ef0
[  142.401296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.401677] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.402039] PKRU: 55555554
[  142.402185] Call Trace:
[  142.402319]  <TASK>
[  142.402451] ? __warn (kernel/panic.c:677) 
[  142.402732] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.403069] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.403269] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.403465] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.403676] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.403903] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.404121] br_dev_delete (net/bridge/br_if.c:396) 
[  142.404314] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.404556] cleanup_net (net/core/net_namespace.c:630) 
[  142.404755] ? process_one_work (kernel/workqueue.c:2606) 
[  142.404974] process_one_work (kernel/workqueue.c:2633) 
[  142.405189] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.405387] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.405616] kthread (kernel/kthread.c:388) 
[  142.405795] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.405993] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.406183] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.406381] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.410150] ------------[ cut here ]------------
| [  142.410411] sysfs group 'bridge' not found for kobject 'br0'
| [  142.410749] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.411192] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.411940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.412541] Workqueue: netns cleanup_net
[  142.412754] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.413004] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  142.413965] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  142.414234] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  142.414623] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.414993] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  142.415354] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a28610
[  142.415750] R13: ffffaa568026be08 R14: ffff952cc3a28b80 R15: ffffffffbb478f90
[  142.416117] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  142.416527] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.416858] CR2: 000055d5779cfdec CR3: 0000000002808005 CR4: 0000000000770ef0
[  142.417219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.417581] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.417977] PKRU: 55555554
[  142.418142] Call Trace:
[  142.418283]  <TASK>
[  142.418401] ? __warn (kernel/panic.c:677) 
[  142.418575] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.418815] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.419029] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.419216] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.419417] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.419640] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.419870] br_dev_delete (net/bridge/br_if.c:396) 
[  142.420091] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.420323] cleanup_net (net/core/net_namespace.c:630) 
[  142.420517] ? process_one_work (kernel/workqueue.c:2606) 
[  142.420754] process_one_work (kernel/workqueue.c:2633) 
[  142.420967] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.421202] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.421425] kthread (kernel/kthread.c:388) 
[  142.421596] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.421801] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.421995] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.422214] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.424807] ------------[ cut here ]------------
| [  142.425047] sysfs group 'bridge' not found for kobject 'br0'
| [  142.425354] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.425798] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.426535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.427141] Workqueue: netns cleanup_net
[  142.427347] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.427595] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  142.428556] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  142.428830] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  142.429217] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.429579] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  142.429947] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ca610
[  142.430334] R13: ffffaa568026be08 R14: ffff952cc29cab80 R15: ffffffffbb478f90
[  142.430749] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  142.431202] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.431498] CR2: 000055d5779cfdec CR3: 0000000002808005 CR4: 0000000000770ef0
[  142.431877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.432250] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.432629] PKRU: 55555554
[  142.432780] Call Trace:
[  142.432915]  <TASK>
[  142.433031] ? __warn (kernel/panic.c:677) 
[  142.433204] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.433450] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.433646] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.433840] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.434043] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.434266] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.434506] br_dev_delete (net/bridge/br_if.c:396) 
[  142.434713] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.434948] cleanup_net (net/core/net_namespace.c:630) 
[  142.435147] ? process_one_work (kernel/workqueue.c:2606) 
[  142.435364] process_one_work (kernel/workqueue.c:2633) 
[  142.435588] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.435818] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.436043] kthread (kernel/kthread.c:388) 
[  142.436214] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.436422] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.436622] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.436862] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  185.031937] ------------[ cut here ]------------
| [  185.032236] sysfs group 'bridge' not found for kobject 'br0'
| [  185.032587] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  185.033086] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  185.033955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  185.034590] Workqueue: netns cleanup_net
[  185.034848] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 185.035144] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  185.036157] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  185.036484] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  185.036902] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  185.037307] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  185.037731] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55ae610
[  185.038108] R13: ffffaa568026be08 R14: ffff952cc55aeb80 R15: ffff952cc2b64550
[  185.038525] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  185.039001] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.039380] CR2: 00007fff9ffa6588 CR3: 0000000002808006 CR4: 0000000000770ef0
[  185.039804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  185.040220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  185.040645] PKRU: 55555554
[  185.040836] Call Trace:
[  185.041017]  <TASK>
[  185.041195] ? __warn (kernel/panic.c:677) 
[  185.041374] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.041637] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  185.041883] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  185.042111] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  185.042356] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  185.042633] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.042909] br_dev_delete (net/bridge/br_if.c:396) 
[  185.043138] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  185.043435] cleanup_net (net/core/net_namespace.c:630) 
[  185.043664] ? process_one_work (kernel/workqueue.c:2606) 
[  185.043909] process_one_work (kernel/workqueue.c:2633) 
[  185.044126] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  185.044326] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  185.044551] kthread (kernel/kthread.c:388) 
[  185.044729] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.044973] ret_from_fork (arch/x86/kernel/process.c:147) 
[  185.045269] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.045507] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  185.156915] ------------[ cut here ]------------
| [  185.157194] sysfs group 'bridge' not found for kobject 'br0'
| [  185.157566] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  185.158027] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  185.158893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  185.159545] Workqueue: netns cleanup_net
[  185.159800] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 185.160095] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  185.161064] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  185.161375] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  185.161806] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  185.162203] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  185.162593] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[  185.163026] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc39f4550
[  185.163476] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  185.163939] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.164253] CR2: 00007fff9ffa6588 CR3: 0000000036460005 CR4: 0000000000770ef0
[  185.164663] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  185.165090] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  185.165482] PKRU: 55555554
[  185.165645] Call Trace:
[  185.165836]  <TASK>
[  185.165991] ? __warn (kernel/panic.c:677) 
[  185.166198] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.166437] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  185.166689] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  185.166931] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  185.167164] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  185.167442] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.167719] br_dev_delete (net/bridge/br_if.c:396) 
[  185.167956] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  185.168217] cleanup_net (net/core/net_namespace.c:630) 
[  185.168430] ? process_one_work (kernel/workqueue.c:2606) 
[  185.168691] process_one_work (kernel/workqueue.c:2633) 
[  185.168970] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  185.169240] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  185.169514] kthread (kernel/kthread.c:388) 
[  185.169736] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.169992] ret_from_fork (arch/x86/kernel/process.c:147) 
[  185.170235] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.170483] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  185.173462] ------------[ cut here ]------------
| [  185.173762] sysfs group 'bridge' not found for kobject 'br0'
| [  185.174161] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  185.174601] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  185.175460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  185.176105] Workqueue: netns cleanup_net
[  185.176360] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 185.176636] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  185.177613] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  185.177926] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  185.178329] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  185.178716] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  185.179127] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc55a8610
[  185.179567] R13: ffffaa568026be08 R14: ffff952cc55a8b80 R15: ffff952cc39f4550
[  185.179967] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  185.180413] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.180751] CR2: 00007fff9ffa6588 CR3: 0000000036460005 CR4: 0000000000770ef0
[  185.181161] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  185.181565] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  185.181961] PKRU: 55555554
[  185.182148] Call Trace:
[  185.182321]  <TASK>
[  185.182467] ? __warn (kernel/panic.c:677) 
[  185.182668] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.182932] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  185.183176] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  185.183424] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  185.183644] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  185.183910] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.184171] br_dev_delete (net/bridge/br_if.c:396) 
[  185.184394] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  185.184642] cleanup_net (net/core/net_namespace.c:630) 
[  185.184875] ? process_one_work (kernel/workqueue.c:2606) 
[  185.185134] process_one_work (kernel/workqueue.c:2633) 
[  185.185385] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  185.185602] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  185.185868] kthread (kernel/kthread.c:388) 
[  185.186092] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.186319] ret_from_fork (arch/x86/kernel/process.c:147) 
[  185.186527] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.186765] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  185.368013] ------------[ cut here ]------------
| [  185.368420] sysfs group 'bridge' not found for kobject 'br0'
| [  185.368907] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  185.369532] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  185.370693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  185.371566] Workqueue: netns cleanup_net
[  185.371901] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 185.372281] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  185.373710] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  185.374124] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  185.374689] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  185.375248] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  185.375804] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a28610
[  185.376352] R13: ffffaa568026be08 R14: ffff952cc3a28b80 R15: ffff952cc2b60050
[  185.376913] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  185.377532] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.377996] CR2: 00007fff9ffa6588 CR3: 0000000036460005 CR4: 0000000000770ef0
[  185.378551] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  185.379117] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  185.379677] PKRU: 55555554
[  185.379899] Call Trace:
[  185.380104]  <TASK>
[  185.380285] ? __warn (kernel/panic.c:677) 
[  185.380559] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.380906] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  185.381208] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  185.381491] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  185.381814] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  185.382161] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  185.382504] br_dev_delete (net/bridge/br_if.c:396) 
[  185.382818] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  185.383177] cleanup_net (net/core/net_namespace.c:630) 
[  185.383478] ? process_one_work (kernel/workqueue.c:2606) 
[  185.383834] process_one_work (kernel/workqueue.c:2633) 
[  185.384165] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  185.384473] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  185.384831] kthread (kernel/kthread.c:388) 
[  185.385095] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.385405] ret_from_fork (arch/x86/kernel/process.c:147) 
[  185.385711] ? __pfx_kthread (kernel/kthread.c:341) 
[  185.386020] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  195.812900] ------------[ cut here ]------------
| [  195.813349] sysfs group 'bridge' not found for kobject 'br0'
| [  195.813909] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  195.814649] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  195.815845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  195.816779] Workqueue: netns cleanup_net
[  195.817137] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 195.817556] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  195.818798] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  195.819191] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  195.819668] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  195.820141] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  195.820520] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b4610
[  195.820896] R13: ffffaa568026be08 R14: ffff952cc49b4b80 R15: ffff952cc2b61750
[  195.821455] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  195.821984] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  195.822418] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[  195.823029] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  195.823722] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  195.824423] PKRU: 55555554
[  195.824704] Call Trace:
[  195.824976]  <TASK>
[  195.825194] ? __warn (kernel/panic.c:677) 
[  195.825538] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.825978] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  195.826364] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  195.826723] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  195.827094] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  195.827494] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.827913] br_dev_delete (net/bridge/br_if.c:396) 
[  195.828320] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  195.828750] cleanup_net (net/core/net_namespace.c:630) 
[  195.829125] ? process_one_work (kernel/workqueue.c:2606) 
[  195.829560] process_one_work (kernel/workqueue.c:2633) 
[  195.829967] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  195.830314] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  195.830664] kthread (kernel/kthread.c:388) 
[  195.830918] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.831297] ret_from_fork (arch/x86/kernel/process.c:147) 
[  195.831668] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.831996] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  195.954968] ------------[ cut here ]------------
| [  195.955508] sysfs group 'bridge' not found for kobject 'br0'
| [  195.956239] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  195.957244] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  195.959076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  195.960509] Workqueue: netns cleanup_net
[  195.960993] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 195.961593] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  195.963045] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  195.963318] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  195.963691] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  195.964059] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  195.964514] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b6610
[  195.965129] R13: ffffaa568026be08 R14: ffff952cc49b6b80 R15: ffff952cc2b60050
[  195.965611] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  195.966360] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  195.966975] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[  195.967708] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  195.968508] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  195.969214] PKRU: 55555554
[  195.969484] Call Trace:
[  195.969732]  <TASK>
[  195.969957] ? __warn (kernel/panic.c:677) 
[  195.970247] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.970582] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  195.970911] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  195.971243] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  195.971578] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  195.971948] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.972290] br_dev_delete (net/bridge/br_if.c:396) 
[  195.972594] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  195.972973] cleanup_net (net/core/net_namespace.c:630) 
[  195.973300] ? process_one_work (kernel/workqueue.c:2606) 
[  195.973586] process_one_work (kernel/workqueue.c:2633) 
[  195.973930] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  195.974196] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  195.974569] kthread (kernel/kthread.c:388) 
[  195.974810] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.975146] ret_from_fork (arch/x86/kernel/process.c:147) 
[  195.975403] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.975738] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  195.979038] ------------[ cut here ]------------
| [  195.979301] sysfs group 'bridge' not found for kobject 'br0'
| [  195.979759] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  195.980273] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  195.981409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  195.982349] Workqueue: netns cleanup_net
[  195.982699] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 195.983093] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  195.984625] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  195.985067] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  195.985677] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  195.986256] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  195.986876] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b0610
[  195.987487] R13: ffffaa568026be08 R14: ffff952cc49b0b80 R15: ffff952cc2b60050
[  195.988037] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  195.988683] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  195.989152] CR2: 00007fff9ffa6588 CR3: 0000000036460006 CR4: 0000000000770ef0
[  195.989726] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  195.990269] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  195.990844] PKRU: 55555554
[  195.991080] Call Trace:
[  195.991298]  <TASK>
[  195.991417] ? __warn (kernel/panic.c:677) 
[  195.991593] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.991839] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  195.992063] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  195.992315] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  195.992517] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  195.992747] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  195.992969] br_dev_delete (net/bridge/br_if.c:396) 
[  195.993162] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  195.993392] cleanup_net (net/core/net_namespace.c:630) 
[  195.993586] ? process_one_work (kernel/workqueue.c:2606) 
[  195.993815] process_one_work (kernel/workqueue.c:2633) 
[  195.994029] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  195.994228] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  195.994454] kthread (kernel/kthread.c:388) 
[  195.994625] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.994833] ret_from_fork (arch/x86/kernel/process.c:147) 
[  195.995027] ? __pfx_kthread (kernel/kthread.c:341) 
[  195.995225] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  196.191911] ------------[ cut here ]------------
| [  196.192358] sysfs group 'bridge' not found for kobject 'br0'
| [  196.192954] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  196.193748] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  196.195182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  196.195884] Workqueue: netns cleanup_net
[  196.196176] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 196.196528] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  196.197805] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  196.198091] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  196.198677] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  196.199277] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  196.199743] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e6610
[  196.200366] R13: ffffaa568026be08 R14: ffff952cc49e6b80 R15: ffff952cc3892e50
[  196.201037] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  196.201740] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  196.202254] CR2: 00007f351430f000 CR3: 0000000036460001 CR4: 0000000000770ef0
[  196.202908] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  196.203512] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  196.204120] PKRU: 55555554
[  196.204364] Call Trace:
[  196.204599]  <TASK>
[  196.204816] ? __warn (kernel/panic.c:677) 
[  196.205119] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  196.205556] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  196.205887] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  196.206175] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  196.206545] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  196.206964] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  196.207326] br_dev_delete (net/bridge/br_if.c:396) 
[  196.207710] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  196.208130] cleanup_net (net/core/net_namespace.c:630) 
[  196.208486] ? process_one_work (kernel/workqueue.c:2606) 
[  196.208901] process_one_work (kernel/workqueue.c:2633) 
[  196.209304] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  196.209682] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  196.210043] kthread (kernel/kthread.c:388) 
[  196.210361] ? __pfx_kthread (kernel/kthread.c:341) 
[  196.210662] ret_from_fork (arch/x86/kernel/process.c:147) 
[  196.210980] ? __pfx_kthread (kernel/kthread.c:341) 
[  196.211314] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  238.574968] ------------[ cut here ]------------
| [  238.575380] sysfs group 'bridge' not found for kobject 'br0'
| [  238.575873] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  238.576562] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  238.577936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  238.578819] Workqueue: netns cleanup_net
[  238.579174] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 238.579569] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  238.581139] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  238.581637] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  238.582027] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  238.582465] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  238.582943] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e6610
[  238.583494] R13: ffffaa568026be08 R14: ffff952cc49e6b80 R15: ffff952cc3890050
[  238.583885] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  238.584392] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  238.584840] CR2: 00007f3dbe7ea000 CR3: 0000000036460001 CR4: 0000000000770ef0
[  238.585315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  238.585769] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  238.586317] PKRU: 55555554
[  238.586559] Call Trace:
[  238.586780]  <TASK>
[  238.586961] ? __warn (kernel/panic.c:677) 
[  238.587271] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.587630] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  238.587935] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  238.588253] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  238.588597] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  238.588965] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.589326] br_dev_delete (net/bridge/br_if.c:396) 
[  238.589673] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  238.590069] cleanup_net (net/core/net_namespace.c:630) 
[  238.590397] ? process_one_work (kernel/workqueue.c:2606) 
[  238.590776] process_one_work (kernel/workqueue.c:2633) 
[  238.591126] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  238.591461] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  238.591833] kthread (kernel/kthread.c:388) 
[  238.592120] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.592442] ret_from_fork (arch/x86/kernel/process.c:147) 
[  238.592754] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.593086] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  238.726851] ------------[ cut here ]------------
| [  238.727342] sysfs group 'bridge' not found for kobject 'br0'
| [  238.727943] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  238.728748] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  238.730281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  238.731383] Workqueue: netns cleanup_net
[  238.731807] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 238.732286] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  238.733886] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  238.734347] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  238.734992] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  238.735611] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  238.736251] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a62610
[  238.736891] R13: ffffaa568026be08 R14: ffff952cc2a62b80 R15: ffffffffbb478f90
[  238.737254] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  238.737737] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  238.738173] CR2: 00007f12d1ad3000 CR3: 0000000036460004 CR4: 0000000000770ef0
[  238.738585] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  238.738969] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  238.739548] PKRU: 55555554
[  238.739790] Call Trace:
[  238.739994]  <TASK>
[  238.740125] ? __warn (kernel/panic.c:677) 
[  238.740333] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.740782] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  238.741227] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  238.741557] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  238.741962] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  238.742349] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.742715] br_dev_delete (net/bridge/br_if.c:396) 
[  238.743067] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  238.743461] cleanup_net (net/core/net_namespace.c:630) 
[  238.743827] ? process_one_work (kernel/workqueue.c:2606) 
[  238.744234] process_one_work (kernel/workqueue.c:2633) 
[  238.744670] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  238.745204] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  238.745827] kthread (kernel/kthread.c:388) 
[  238.746251] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.746662] ret_from_fork (arch/x86/kernel/process.c:147) 
[  238.747041] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.747394] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  238.751892] ------------[ cut here ]------------
| [  238.752157] sysfs group 'bridge' not found for kobject 'br0'
| [  238.752513] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  238.752980] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  238.753809] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  238.754402] Workqueue: netns cleanup_net
[  238.754650] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 238.754949] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  238.755980] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  238.756280] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  238.756677] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  238.757124] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  238.757485] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1934610
[  238.757894] R13: ffffaa568026be08 R14: ffff952cc1934b80 R15: ffffffffbb478f90
[  238.758308] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  238.758755] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  238.759098] CR2: 000055d5779cfdec CR3: 0000000002808006 CR4: 0000000000770ef0
[  238.759498] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  238.759870] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  238.760245] PKRU: 55555554
[  238.760390] Call Trace:
[  238.760524]  <TASK>
[  238.760640] ? __warn (kernel/panic.c:677) 
[  238.760819] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.761039] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  238.761235] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  238.761422] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  238.761627] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  238.761855] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.762075] br_dev_delete (net/bridge/br_if.c:396) 
[  238.762267] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  238.762499] cleanup_net (net/core/net_namespace.c:630) 
[  238.762700] ? process_one_work (kernel/workqueue.c:2606) 
[  238.762919] process_one_work (kernel/workqueue.c:2633) 
[  238.763134] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  238.763335] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  238.763571] kthread (kernel/kthread.c:388) 
[  238.763746] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.763948] ret_from_fork (arch/x86/kernel/process.c:147) 
[  238.764138] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.764334] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  238.766868] ------------[ cut here ]------------
| [  238.767108] sysfs group 'bridge' not found for kobject 'br0'
| [  238.767416] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  238.767830] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  238.768569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  238.769146] Workqueue: netns cleanup_net
[  238.769352] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 238.769600] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  238.770532] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  238.770807] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  238.771169] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  238.771532] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  238.771898] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e4610
[  238.772259] R13: ffffaa568026be08 R14: ffff952cc49e4b80 R15: ffffffffbb478f90
[  238.772622] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  238.773036] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  238.773331] CR2: 000055d5779cfdec CR3: 0000000002808006 CR4: 0000000000770ef0
[  238.773699] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  238.774061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  238.774422] PKRU: 55555554
[  238.774565] Call Trace:
[  238.774706]  <TASK>
[  238.774822] ? __warn (kernel/panic.c:677) 
[  238.774995] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.775215] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  238.775410] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  238.775595] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  238.775803] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  238.776024] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  238.776247] br_dev_delete (net/bridge/br_if.c:396) 
[  238.776438] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  238.776674] cleanup_net (net/core/net_namespace.c:630) 
[  238.776866] ? process_one_work (kernel/workqueue.c:2606) 
[  238.777083] process_one_work (kernel/workqueue.c:2633) 
[  238.777295] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  238.777494] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  238.777725] kthread (kernel/kthread.c:388) 
[  238.777894] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.778092] ret_from_fork (arch/x86/kernel/process.c:147) 
[  238.778282] ? __pfx_kthread (kernel/kthread.c:341) 
[  238.778479] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  247.262936] ------------[ cut here ]------------
| [  247.263357] sysfs group 'bridge' not found for kobject 'br0'
| [  247.263678] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  247.264262] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  247.265514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  247.266523] Workqueue: netns cleanup_net
[  247.266893] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 247.267286] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  247.268884] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  247.269337] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  247.269937] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  247.270526] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  247.271113] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b84610
[  247.271698] R13: ffffaa568026be08 R14: ffff952cc4b84b80 R15: ffff952cc3891750
[  247.272284] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  247.272884] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.273341] CR2: 00007f55b0a1b000 CR3: 0000000036460003 CR4: 0000000000770ef0
[  247.273863] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  247.274226] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  247.274620] PKRU: 55555554
[  247.274774] Call Trace:
[  247.274908]  <TASK>
[  247.275027] ? __warn (kernel/panic.c:677) 
[  247.275202] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.275420] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  247.275618] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  247.275810] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  247.276014] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  247.276237] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.276457] br_dev_delete (net/bridge/br_if.c:396) 
[  247.276651] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  247.276887] cleanup_net (net/core/net_namespace.c:630) 
[  247.277079] ? process_one_work (kernel/workqueue.c:2606) 
[  247.277317] process_one_work (kernel/workqueue.c:2633) 
[  247.277529] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  247.277732] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  247.277957] kthread (kernel/kthread.c:388) 
[  247.278129] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.278339] ret_from_fork (arch/x86/kernel/process.c:147) 
[  247.278531] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.278735] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  247.402864] ------------[ cut here ]------------
| [  247.403331] sysfs group 'bridge' not found for kobject 'br0'
| [  247.403899] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  247.405163] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  247.407646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  247.409319] Workqueue: netns cleanup_net
[  247.409944] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 247.410632] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  247.412442] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  247.412860] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  247.413403] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  247.413967] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  247.414506] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29c8610
[  247.415011] R13: ffffaa568026be08 R14: ffff952cc29c8b80 R15: ffffffffbb478f90
[  247.415382] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  247.415836] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.416131] CR2: 00007f6511970000 CR3: 00000000025ce006 CR4: 0000000000770ef0
[  247.416493] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  247.416879] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  247.417243] PKRU: 55555554
[  247.417387] Call Trace:
[  247.417520]  <TASK>
[  247.417639] ? __warn (kernel/panic.c:677) 
[  247.417841] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.418060] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  247.418258] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  247.418450] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  247.418661] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  247.418892] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.419111] br_dev_delete (net/bridge/br_if.c:396) 
[  247.419305] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  247.419536] cleanup_net (net/core/net_namespace.c:630) 
[  247.419761] ? process_one_work (kernel/workqueue.c:2606) 
[  247.419984] process_one_work (kernel/workqueue.c:2633) 
[  247.420231] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  247.420429] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  247.420661] kthread (kernel/kthread.c:388) 
[  247.420839] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.421037] ret_from_fork (arch/x86/kernel/process.c:147) 
[  247.421231] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.421427] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  247.424083] ------------[ cut here ]------------
| [  247.424354] sysfs group 'bridge' not found for kobject 'br0'
| [  247.424679] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  247.425100] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  247.425881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  247.426454] Workqueue: netns cleanup_net
[  247.426671] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 247.426920] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  247.427849] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  247.428118] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  247.428479] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  247.428855] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  247.429232] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29cc610
[  247.429606] R13: ffffaa568026be08 R14: ffff952cc29ccb80 R15: ffffffffbb478f90
[  247.429973] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  247.430391] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.430692] CR2: 00007f84751f9000 CR3: 0000000036460005 CR4: 0000000000770ef0
[  247.431054] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  247.431414] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  247.431779] PKRU: 55555554
[  247.431923] Call Trace:
[  247.432057]  <TASK>
[  247.432175] ? __warn (kernel/panic.c:677) 
[  247.432349] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.432566] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  247.432767] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  247.432953] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  247.433154] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  247.433403] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.433620] br_dev_delete (net/bridge/br_if.c:396) 
[  247.433819] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  247.434051] cleanup_net (net/core/net_namespace.c:630) 
[  247.434243] ? process_one_work (kernel/workqueue.c:2606) 
[  247.434461] process_one_work (kernel/workqueue.c:2633) 
[  247.434681] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  247.434880] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  247.435105] kthread (kernel/kthread.c:388) 
[  247.435275] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.435479] ret_from_fork (arch/x86/kernel/process.c:147) 
[  247.435678] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.435876] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  247.438433] ------------[ cut here ]------------
| [  247.438677] sysfs group 'bridge' not found for kobject 'br0'
| [  247.438986] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  247.439396] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  247.440147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  247.440724] Workqueue: netns cleanup_net
[  247.440932] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 247.441179] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  247.442132] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  247.442402] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  247.442767] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  247.443127] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  247.443488] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2c610
[  247.443853] R13: ffffaa568026be08 R14: ffff952cc3a2cb80 R15: ffffffffbb478f90
[  247.444215] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  247.444621] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.444921] CR2: 00007f84751f9000 CR3: 0000000036460005 CR4: 0000000000770ef0
[  247.445309] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  247.445676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  247.446038] PKRU: 55555554
[  247.446183] Call Trace:
[  247.446316]  <TASK>
[  247.446433] ? __warn (kernel/panic.c:677) 
[  247.446606] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.446829] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  247.447024] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  247.447210] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  247.447410] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  247.447634] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  247.447857] br_dev_delete (net/bridge/br_if.c:396) 
[  247.448047] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  247.448279] cleanup_net (net/core/net_namespace.c:630) 
[  247.448470] ? process_one_work (kernel/workqueue.c:2606) 
[  247.448694] process_one_work (kernel/workqueue.c:2633) 
[  247.448908] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  247.449106] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  247.449351] kthread (kernel/kthread.c:388) 
[  247.449545] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.449814] ret_from_fork (arch/x86/kernel/process.c:147) 
[  247.450114] ? __pfx_kthread (kernel/kthread.c:341) 
[  247.450395] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  257.297921] ------------[ cut here ]------------
| [  257.298351] sysfs group 'bridge' not found for kobject 'br0'
| [  257.298905] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  257.299600] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  257.300979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  257.301730] Workqueue: netns cleanup_net
[  257.302023] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 257.302343] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  257.303499] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  257.304009] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  257.304571] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  257.305115] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  257.305793] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260c610
[  257.306630] R13: ffffaa568026be08 R14: ffff952cc260cb80 R15: ffff952cc2b61750
[  257.307289] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  257.308068] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  257.308663] CR2: 00007f5e70d690e0 CR3: 0000000036460003 CR4: 0000000000770ef0
[  257.309395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  257.310221] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  257.311083] PKRU: 55555554
[  257.311359] Call Trace:
[  257.311635]  <TASK>
[  257.311855] ? __warn (kernel/panic.c:677) 
[  257.312148] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.312556] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  257.312897] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  257.313240] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  257.313609] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  257.313959] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.314393] br_dev_delete (net/bridge/br_if.c:396) 
[  257.314718] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  257.315085] cleanup_net (net/core/net_namespace.c:630) 
[  257.315463] ? process_one_work (kernel/workqueue.c:2606) 
[  257.315756] process_one_work (kernel/workqueue.c:2633) 
[  257.315973] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  257.316201] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  257.316516] kthread (kernel/kthread.c:388) 
[  257.316697] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.316894] ret_from_fork (arch/x86/kernel/process.c:147) 
[  257.317087] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.317292] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  257.446869] ------------[ cut here ]------------
| [  257.447299] sysfs group 'bridge' not found for kobject 'br0'
| [  257.447866] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  257.448646] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  257.450479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  257.451664] Workqueue: netns cleanup_net
[  257.452087] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 257.452643] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  257.454308] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  257.454701] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  257.455096] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  257.455486] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  257.455984] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[  257.456624] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffffffffbb478f90
[  257.457009] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  257.457748] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  257.458270] CR2: 00007f2ae7b87000 CR3: 0000000036460001 CR4: 0000000000770ef0
[  257.458990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  257.459677] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  257.460198] PKRU: 55555554
[  257.460426] Call Trace:
[  257.460663]  <TASK>
[  257.460860] ? __warn (kernel/panic.c:677) 
[  257.461152] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.461514] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  257.461866] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  257.462188] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  257.462544] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  257.462948] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.463383] br_dev_delete (net/bridge/br_if.c:396) 
[  257.463737] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  257.464144] cleanup_net (net/core/net_namespace.c:630) 
[  257.464459] ? process_one_work (kernel/workqueue.c:2606) 
[  257.464843] process_one_work (kernel/workqueue.c:2633) 
[  257.465206] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  257.465498] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  257.465872] kthread (kernel/kthread.c:388) 
[  257.466097] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.466423] ret_from_fork (arch/x86/kernel/process.c:147) 
[  257.466710] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.467076] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  257.470861] ------------[ cut here ]------------
| [  257.471144] sysfs group 'bridge' not found for kobject 'br0'
| [  257.471522] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  257.472049] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  257.473005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  257.473683] Workqueue: netns cleanup_net
[  257.473945] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 257.474243] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  257.475258] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  257.475572] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  257.476003] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  257.476411] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  257.476828] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2e610
[  257.477235] R13: ffffaa568026be08 R14: ffff952cc3a2eb80 R15: ffffffffbb478f90
[  257.477756] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  257.478208] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  257.478542] CR2: 00007fcf68232000 CR3: 0000000036460005 CR4: 0000000000770ef0
[  257.478937] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  257.479357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  257.479809] PKRU: 55555554
[  257.480019] Call Trace:
[  257.480189]  <TASK>
[  257.480370] ? __warn (kernel/panic.c:677) 
[  257.480613] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.480919] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  257.481178] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  257.481390] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  257.481650] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  257.481936] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.482193] br_dev_delete (net/bridge/br_if.c:396) 
[  257.482406] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  257.482690] cleanup_net (net/core/net_namespace.c:630) 
[  257.482936] ? process_one_work (kernel/workqueue.c:2606) 
[  257.483192] process_one_work (kernel/workqueue.c:2633) 
[  257.483431] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  257.483700] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  257.484006] kthread (kernel/kthread.c:388) 
[  257.484210] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.484437] ret_from_fork (arch/x86/kernel/process.c:147) 
[  257.484675] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.484917] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  257.487801] ------------[ cut here ]------------
| [  257.488102] sysfs group 'bridge' not found for kobject 'br0'
| [  257.488430] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  257.488962] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  257.490772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  257.491925] Workqueue: netns cleanup_net
[  257.492309] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 257.492796] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  257.494543] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  257.494989] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  257.495681] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  257.496316] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  257.496974] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b84610
[  257.497597] R13: ffffaa568026be08 R14: ffff952cc4b84b80 R15: ffffffffbb478f90
[  257.498016] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  257.498543] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  257.498898] CR2: 00007f380cda2270 CR3: 0000000005fd6005 CR4: 0000000000770ef0
[  257.499289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  257.499698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  257.500261] PKRU: 55555554
[  257.500409] Call Trace:
[  257.500541]  <TASK>
[  257.500672] ? __warn (kernel/panic.c:677) 
[  257.500847] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.501065] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  257.501263] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  257.501451] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  257.501660] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  257.501884] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  257.502104] br_dev_delete (net/bridge/br_if.c:396) 
[  257.502296] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  257.502526] cleanup_net (net/core/net_namespace.c:630) 
[  257.502724] ? process_one_work (kernel/workqueue.c:2606) 
[  257.502944] process_one_work (kernel/workqueue.c:2633) 
[  257.503155] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  257.503352] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  257.503575] kthread (kernel/kthread.c:388) 
[  257.503751] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.503949] ret_from_fork (arch/x86/kernel/process.c:147) 
[  257.504141] ? __pfx_kthread (kernel/kthread.c:341) 
[  257.504336] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  267.515915] ------------[ cut here ]------------
| [  267.516197] sysfs group 'bridge' not found for kobject 'br0'
| [  267.516548] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  267.517018] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  267.518315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  267.519208] Workqueue: netns cleanup_net
[  267.519549] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 267.519970] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  267.521380] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  267.521845] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  267.522420] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  267.522996] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  267.523562] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2608610
[  267.524134] R13: ffffaa568026be08 R14: ffff952cc2608b80 R15: ffff952cc3965c50
[  267.524710] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  267.525344] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  267.525824] CR2: 00007fff9ffa6588 CR3: 0000000002808001 CR4: 0000000000770ef0
[  267.526389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  267.526956] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  267.527508] PKRU: 55555554
[  267.527761] Call Trace:
[  267.527976]  <TASK>
[  267.528096] ? __warn (kernel/panic.c:677) 
[  267.528272] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.528491] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  267.528693] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  267.528916] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  267.529170] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  267.529411] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.529645] br_dev_delete (net/bridge/br_if.c:396) 
[  267.529870] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  267.530163] cleanup_net (net/core/net_namespace.c:630) 
[  267.530411] ? process_one_work (kernel/workqueue.c:2606) 
[  267.530665] process_one_work (kernel/workqueue.c:2633) 
[  267.530901] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  267.531130] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  267.531406] kthread (kernel/kthread.c:388) 
[  267.531598] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.531851] ret_from_fork (arch/x86/kernel/process.c:147) 
[  267.532043] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.532270] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  267.644917] ------------[ cut here ]------------
| [  267.645198] sysfs group 'bridge' not found for kobject 'br0'
| [  267.645525] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  267.645980] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  267.647016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  267.647605] Workqueue: netns cleanup_net
[  267.647855] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 267.648142] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  267.649099] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  267.649381] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  267.649780] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  267.650190] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  267.650585] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ce610
[  267.650964] R13: ffffaa568026be08 R14: ffff952cc29ceb80 R15: ffff952cc39f5c50
[  267.651357] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  267.651811] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  267.652138] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  267.652513] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  267.652904] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  267.653298] PKRU: 55555554
[  267.653465] Call Trace:
[  267.653609]  <TASK>
[  267.653759] ? __warn (kernel/panic.c:677) 
[  267.653965] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.654204] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  267.654412] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  267.654621] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  267.654870] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  267.655114] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.655345] br_dev_delete (net/bridge/br_if.c:396) 
[  267.655561] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  267.655832] cleanup_net (net/core/net_namespace.c:630) 
[  267.656050] ? process_one_work (kernel/workqueue.c:2606) 
[  267.656279] process_one_work (kernel/workqueue.c:2633) 
[  267.656518] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  267.656759] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  267.657009] kthread (kernel/kthread.c:388) 
[  267.657188] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.657412] ret_from_fork (arch/x86/kernel/process.c:147) 
[  267.657631] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.657912] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  267.660625] ------------[ cut here ]------------
| [  267.660881] sysfs group 'bridge' not found for kobject 'br0'
| [  267.661221] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  267.661662] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  267.662592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  267.663199] Workqueue: netns cleanup_net
[  267.663441] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 267.663721] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  267.664661] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  267.664964] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  267.665379] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  267.665919] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  267.666426] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc29ca610
[  267.666998] R13: ffffaa568026be08 R14: ffff952cc29cab80 R15: ffff952cc39f5c50
[  267.667577] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  267.668222] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  267.668700] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  267.669260] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  267.669834] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  267.670417] PKRU: 55555554
[  267.670685] Call Trace:
[  267.670906]  <TASK>
[  267.671101] ? __warn (kernel/panic.c:677) 
[  267.671396] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.671761] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  267.672086] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  267.672389] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  267.672718] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  267.673081] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.673431] br_dev_delete (net/bridge/br_if.c:396) 
[  267.673777] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  267.674144] cleanup_net (net/core/net_namespace.c:630) 
[  267.674454] ? process_one_work (kernel/workqueue.c:2606) 
[  267.674842] process_one_work (kernel/workqueue.c:2633) 
[  267.675207] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  267.675545] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  267.675918] kthread (kernel/kthread.c:388) 
[  267.676190] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.676510] ret_from_fork (arch/x86/kernel/process.c:147) 
[  267.676749] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.676989] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  267.798856] ------------[ cut here ]------------
| [  267.799294] sysfs group 'bridge' not found for kobject 'br0'
| [  267.799789] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  267.800425] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  267.801887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  267.802807] Workqueue: netns cleanup_net
[  267.803089] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 267.803337] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  267.804519] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  267.804794] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  267.805226] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  267.805783] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  267.806246] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a60610
[  267.806833] R13: ffffaa568026be08 R14: ffff952cc2a60b80 R15: ffff952cc3964550
[  267.807466] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  267.808174] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  267.808706] CR2: 00007f93eac34000 CR3: 0000000036460006 CR4: 0000000000770ef0
[  267.809353] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  267.810015] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  267.810679] PKRU: 55555554
[  267.810934] Call Trace:
[  267.811171]  <TASK>
[  267.811381] ? __warn (kernel/panic.c:677) 
[  267.811675] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.812087] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  267.812408] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  267.812727] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  267.813050] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  267.813405] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  267.813794] br_dev_delete (net/bridge/br_if.c:396) 
[  267.814100] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  267.814463] cleanup_net (net/core/net_namespace.c:630) 
[  267.814783] ? process_one_work (kernel/workqueue.c:2606) 
[  267.815117] process_one_work (kernel/workqueue.c:2633) 
[  267.815480] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  267.815685] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  267.815923] kthread (kernel/kthread.c:388) 
[  267.816105] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.816367] ret_from_fork (arch/x86/kernel/process.c:147) 
[  267.816557] ? __pfx_kthread (kernel/kthread.c:341) 
[  267.816759] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  277.285110] ------------[ cut here ]------------
| [  277.285615] sysfs group 'bridge' not found for kobject 'br0'
| [  277.286273] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  277.287378] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  277.289877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  277.291756] Workqueue: netns cleanup_net
[  277.292272] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 277.292868] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  277.295135] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  277.295859] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  277.296567] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  277.297110] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  277.297610] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49e0610
[  277.298117] R13: ffffaa568026be08 R14: ffff952cc49e0b80 R15: ffff952cc3895c50
[  277.298638] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  277.299200] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  277.299548] CR2: 00007f994826f000 CR3: 0000000036460003 CR4: 0000000000770ef0
[  277.300048] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  277.300542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  277.301023] PKRU: 55555554
[  277.301169] Call Trace:
[  277.301343]  <TASK>
[  277.301498] ? __warn (kernel/panic.c:677) 
[  277.301747] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.302064] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  277.302293] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  277.302486] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  277.302791] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  277.303100] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.303402] br_dev_delete (net/bridge/br_if.c:396) 
[  277.303685] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  277.303955] cleanup_net (net/core/net_namespace.c:630) 
[  277.304153] ? process_one_work (kernel/workqueue.c:2606) 
[  277.304398] process_one_work (kernel/workqueue.c:2633) 
[  277.304676] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  277.304916] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  277.305237] kthread (kernel/kthread.c:388) 
[  277.305428] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.305629] ret_from_fork (arch/x86/kernel/process.c:147) 
[  277.305870] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.306136] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  277.420847] ------------[ cut here ]------------
| [  277.421436] sysfs group 'bridge' not found for kobject 'br0'
| [  277.422045] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  277.422947] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  277.424918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  277.426305] Workqueue: netns cleanup_net
[  277.426613] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 277.427069] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  277.428133] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  277.428465] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  277.428985] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  277.429624] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  277.430363] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2c610
[  277.431223] R13: ffffaa568026be08 R14: ffff952cc3a2cb80 R15: ffffffffbb478f90
[  277.432117] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  277.433073] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  277.433745] CR2: 000055d578a36d90 CR3: 0000000036460004 CR4: 0000000000770ef0
[  277.434640] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  277.435501] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  277.436432] PKRU: 55555554
[  277.436841] Call Trace:
[  277.437297]  <TASK>
[  277.437676] ? __warn (kernel/panic.c:677) 
[  277.438176] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.438812] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  277.439381] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  277.439681] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  277.440158] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  277.440695] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.441025] br_dev_delete (net/bridge/br_if.c:396) 
[  277.441315] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  277.441892] cleanup_net (net/core/net_namespace.c:630) 
[  277.442322] ? process_one_work (kernel/workqueue.c:2606) 
[  277.442797] process_one_work (kernel/workqueue.c:2633) 
[  277.443364] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  277.443952] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  277.444512] kthread (kernel/kthread.c:388) 
[  277.444877] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.445301] ret_from_fork (arch/x86/kernel/process.c:147) 
[  277.445873] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.446286] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  277.453135] ------------[ cut here ]------------
| [  277.453430] sysfs group 'bridge' not found for kobject 'br0'
| [  277.453823] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  277.454270] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  277.455227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  277.455838] Workqueue: netns cleanup_net
[  277.456081] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 277.456340] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  277.457281] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  277.457551] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  277.457918] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  277.458286] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  277.458647] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a28610
[  277.459012] R13: ffffaa568026be08 R14: ffff952cc3a28b80 R15: ffffffffbb478f90
[  277.459375] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  277.459789] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  277.460095] CR2: 00007fbc3c12f000 CR3: 0000000036460002 CR4: 0000000000770ef0
[  277.460457] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  277.460823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  277.461187] PKRU: 55555554
[  277.461331] Call Trace:
[  277.461467]  <TASK>
[  277.461584] ? __warn (kernel/panic.c:677) 
[  277.461764] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.461985] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  277.462182] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  277.462375] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  277.462578] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  277.462812] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.463065] br_dev_delete (net/bridge/br_if.c:396) 
[  277.463269] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  277.463525] cleanup_net (net/core/net_namespace.c:630) 
[  277.463729] ? process_one_work (kernel/workqueue.c:2606) 
[  277.463954] process_one_work (kernel/workqueue.c:2633) 
[  277.464179] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  277.464393] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  277.464637] kthread (kernel/kthread.c:388) 
[  277.464813] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.465015] ret_from_fork (arch/x86/kernel/process.c:147) 
[  277.465208] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.465405] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  277.468057] ------------[ cut here ]------------
| [  277.468296] sysfs group 'bridge' not found for kobject 'br0'
| [  277.468602] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  277.469016] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  277.469922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  277.470507] Workqueue: netns cleanup_net
[  277.470718] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 277.470966] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  277.471910] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  277.472179] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  277.472541] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  277.472907] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  277.473302] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260a610
[  277.473671] R13: ffffaa568026be08 R14: ffff952cc260ab80 R15: ffffffffbb478f90
[  277.474033] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  277.474445] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  277.474744] CR2: 00007fbc3c12f000 CR3: 0000000036460002 CR4: 0000000000770ef0
[  277.475104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  277.475465] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  277.475830] PKRU: 55555554
[  277.475974] Call Trace:
[  277.476108]  <TASK>
[  277.476224] ? __warn (kernel/panic.c:677) 
[  277.476405] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.476631] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  277.476833] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  277.477046] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  277.477259] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  277.477502] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  277.477745] br_dev_delete (net/bridge/br_if.c:396) 
[  277.477960] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  277.478206] cleanup_net (net/core/net_namespace.c:630) 
[  277.478416] ? process_one_work (kernel/workqueue.c:2606) 
[  277.478649] process_one_work (kernel/workqueue.c:2633) 
[  277.478870] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  277.479077] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  277.479308] kthread (kernel/kthread.c:388) 
[  277.479478] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.479681] ret_from_fork (arch/x86/kernel/process.c:147) 
[  277.479883] ? __pfx_kthread (kernel/kthread.c:341) 
[  277.480079] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.259363] ------------[ cut here ]------------
| [  287.259636] sysfs group 'bridge' not found for kobject 'br0'
| [  287.259975] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.260394] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  287.261360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.262027] Workqueue: netns cleanup_net
[  287.262325] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.262704] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  287.263883] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  287.264304] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  287.264861] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  287.265415] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  287.265988] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc552c610
[  287.266552] R13: ffffaa568026be08 R14: ffff952cc552cb80 R15: ffff952cc2b64550
[  287.267159] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  287.267792] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.268244] CR2: 00007f0c791cc000 CR3: 0000000036460004 CR4: 0000000000770ef0
[  287.268819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.269377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.269957] PKRU: 55555554
[  287.270172] Call Trace:
[  287.270379]  <TASK>
[  287.270554] ? __warn (kernel/panic.c:677) 
[  287.270857] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.271215] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  287.271517] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  287.271748] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  287.272052] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  287.272354] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.272689] br_dev_delete (net/bridge/br_if.c:396) 
[  287.272984] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  287.273299] cleanup_net (net/core/net_namespace.c:630) 
[  287.273612] ? process_one_work (kernel/workqueue.c:2606) 
[  287.273921] process_one_work (kernel/workqueue.c:2633) 
[  287.274262] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  287.274506] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  287.274892] kthread (kernel/kthread.c:388) 
[  287.275155] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.275425] ret_from_fork (arch/x86/kernel/process.c:147) 
[  287.275729] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.275971] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.378978] ------------[ cut here ]------------
| [  287.379424] sysfs group 'bridge' not found for kobject 'br0'
| [  287.380068] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.380518] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  287.381512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.382162] Workqueue: netns cleanup_net
[  287.382411] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.382705] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  287.383737] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  287.384044] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  287.384496] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  287.384903] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  287.385323] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a62610
[  287.385694] R13: ffffaa568026be08 R14: ffff952cc2a62b80 R15: ffff952cc3891750
[  287.386097] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  287.386613] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.386973] CR2: 00007fff9ffa65b8 CR3: 0000000002808002 CR4: 0000000000770ef0
[  287.387409] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.387852] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.388255] PKRU: 55555554
[  287.388458] Call Trace:
[  287.388652]  <TASK>
[  287.388808] ? __warn (kernel/panic.c:677) 
[  287.389037] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.389358] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  287.389693] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  287.390013] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  287.390272] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  287.390553] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.390817] br_dev_delete (net/bridge/br_if.c:396) 
[  287.391049] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  287.391369] cleanup_net (net/core/net_namespace.c:630) 
[  287.391623] ? process_one_work (kernel/workqueue.c:2606) 
[  287.391900] process_one_work (kernel/workqueue.c:2633) 
[  287.392138] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  287.392385] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  287.392696] kthread (kernel/kthread.c:388) 
[  287.392932] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.393185] ret_from_fork (arch/x86/kernel/process.c:147) 
[  287.393425] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.393682] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.396735] ------------[ cut here ]------------
| [  287.397047] sysfs group 'bridge' not found for kobject 'br0'
| [  287.397389] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.397881] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  287.398914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.399534] Workqueue: netns cleanup_net
[  287.399847] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.400185] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  287.401187] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  287.401487] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  287.401917] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  287.402338] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  287.402766] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2a610
[  287.403185] R13: ffffaa568026be08 R14: ffff952cc3a2ab80 R15: ffff952cc3891750
[  287.403589] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  287.404060] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.404412] CR2: 00007fff9ffa65b8 CR3: 0000000002808002 CR4: 0000000000770ef0
[  287.404810] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.405213] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.405638] PKRU: 55555554
[  287.405826] Call Trace:
[  287.405985]  <TASK>
[  287.406144] ? __warn (kernel/panic.c:677) 
[  287.406382] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.406647] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  287.406878] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  287.407103] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  287.407342] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  287.407627] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.407877] br_dev_delete (net/bridge/br_if.c:396) 
[  287.408114] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  287.408407] cleanup_net (net/core/net_namespace.c:630) 
[  287.408679] ? process_one_work (kernel/workqueue.c:2606) 
[  287.408936] process_one_work (kernel/workqueue.c:2633) 
[  287.409203] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  287.409460] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  287.409766] kthread (kernel/kthread.c:388) 
[  287.409970] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.410221] ret_from_fork (arch/x86/kernel/process.c:147) 
[  287.410471] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.410739] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  287.531905] ------------[ cut here ]------------
| [  287.532172] sysfs group 'bridge' not found for kobject 'br0'
| [  287.532542] WARNING: CPU: 0 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  287.533041] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  287.534020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  287.534624] Workqueue: netns cleanup_net
[  287.534877] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 287.535197] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  287.536180] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  287.536495] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  287.536921] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  287.537360] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  287.537784] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a64610
[  287.538206] R13: ffffaa568026be08 R14: ffff952cc2a64b80 R15: ffff952cc3892e50
[  287.538580] FS:  0000000000000000(0000) GS:ffff952cfec00000(0000) knlGS:0000000000000000
[  287.539032] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  287.539425] CR2: 00007fff9ffa4c78 CR3: 0000000002808002 CR4: 0000000000770ef0
[  287.539844] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  287.540242] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  287.540663] PKRU: 55555554
[  287.540909] Call Trace:
[  287.541122]  <TASK>
[  287.541272] ? __warn (kernel/panic.c:677) 
[  287.541495] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.541792] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  287.542065] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  287.542309] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  287.542553] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  287.542866] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  287.543189] br_dev_delete (net/bridge/br_if.c:396) 
[  287.543414] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  287.543670] cleanup_net (net/core/net_namespace.c:630) 
[  287.543929] ? process_one_work (kernel/workqueue.c:2606) 
[  287.544219] process_one_work (kernel/workqueue.c:2633) 
[  287.544481] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  287.544741] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  287.545038] kthread (kernel/kthread.c:388) 
[  287.545262] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.545517] ret_from_fork (arch/x86/kernel/process.c:147) 
[  287.545777] ? __pfx_kthread (kernel/kthread.c:341) 
[  287.546064] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  296.508870] ------------[ cut here ]------------
| [  296.509283] sysfs group 'bridge' not found for kobject 'br0'
| [  296.509628] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  296.510102] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  296.511012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  296.511758] Workqueue: netns cleanup_net
[  296.512089] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 296.512370] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  296.514118] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  296.514624] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  296.515335] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  296.516005] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  296.516674] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2a610
[  296.517394] R13: ffffaa568026be08 R14: ffff952cc3a2ab80 R15: ffff952cc2b61750
[  296.518015] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  296.518726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  296.519223] CR2: 000055d578a349e8 CR3: 0000000036460005 CR4: 0000000000770ef0
[  296.519832] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  296.520445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  296.520945] PKRU: 55555554
[  296.521092] Call Trace:
[  296.521248]  <TASK>
[  296.521366] ? __warn (kernel/panic.c:677) 
[  296.521556] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.521788] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  296.521986] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  296.522174] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  296.522378] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  296.522600] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.522826] br_dev_delete (net/bridge/br_if.c:396) 
[  296.523026] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  296.523260] cleanup_net (net/core/net_namespace.c:630) 
[  296.523453] ? process_one_work (kernel/workqueue.c:2606) 
[  296.523677] process_one_work (kernel/workqueue.c:2633) 
[  296.523889] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  296.524095] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  296.524324] kthread (kernel/kthread.c:388) 
[  296.524493] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.524697] ret_from_fork (arch/x86/kernel/process.c:147) 
[  296.524890] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.525089] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  296.610970] ------------[ cut here ]------------
| [  296.611582] sysfs group 'bridge' not found for kobject 'br0'
| [  296.612319] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  296.613406] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  296.615077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  296.615948] Workqueue: netns cleanup_net
[  296.616439] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 296.617004] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  296.619718] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  296.620573] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  296.621682] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  296.622745] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  296.623702] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1932610
[  296.624557] R13: ffffaa568026be08 R14: ffff952cc1932b80 R15: ffff952cc3892e50
[  296.625424] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  296.626387] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  296.627045] CR2: 000055d578a349e8 CR3: 0000000036460005 CR4: 0000000000770ef0
[  296.627617] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  296.628286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  296.628904] PKRU: 55555554
[  296.629128] Call Trace:
[  296.629366]  <TASK>
[  296.629626] ? __warn (kernel/panic.c:677) 
[  296.630276] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.630907] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  296.631380] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  296.631889] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  296.632213] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  296.632724] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.633314] br_dev_delete (net/bridge/br_if.c:396) 
[  296.633884] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  296.634573] cleanup_net (net/core/net_namespace.c:630) 
[  296.635120] ? process_one_work (kernel/workqueue.c:2606) 
[  296.635800] process_one_work (kernel/workqueue.c:2633) 
[  296.636440] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  296.637072] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  296.637717] kthread (kernel/kthread.c:388) 
[  296.638147] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.638631] ret_from_fork (arch/x86/kernel/process.c:147) 
[  296.639121] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.639583] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  296.644393] ------------[ cut here ]------------
| [  296.644953] sysfs group 'bridge' not found for kobject 'br0'
| [  296.645688] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  296.646759] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  296.649076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  296.650477] Workqueue: netns cleanup_net
[  296.650983] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 296.651537] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  296.653332] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  296.653752] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  296.654522] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  296.655294] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  296.656267] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc1936610
[  296.657181] R13: ffffaa568026be08 R14: ffff952cc1936b80 R15: ffff952cc3892e50
[  296.658094] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  296.659100] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  296.659825] CR2: 000055d578a349e8 CR3: 0000000036460005 CR4: 0000000000770ef0
[  296.660690] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  296.661222] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  296.661781] PKRU: 55555554
[  296.662014] Call Trace:
[  296.662206]  <TASK>
[  296.662394] ? __warn (kernel/panic.c:677) 
[  296.662742] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.663201] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  296.663457] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  296.663761] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  296.664037] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  296.664376] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.664603] br_dev_delete (net/bridge/br_if.c:396) 
[  296.664804] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  296.665055] cleanup_net (net/core/net_namespace.c:630) 
[  296.665287] ? process_one_work (kernel/workqueue.c:2606) 
[  296.665549] process_one_work (kernel/workqueue.c:2633) 
[  296.665768] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  296.665966] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  296.666191] kthread (kernel/kthread.c:388) 
[  296.666358] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.666577] ret_from_fork (arch/x86/kernel/process.c:147) 
[  296.666776] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.666974] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  296.770846] ------------[ cut here ]------------
| [  296.771282] sysfs group 'bridge' not found for kobject 'br0'
| [  296.771870] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  296.772627] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  296.774127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  296.774795] Workqueue: netns cleanup_net
[  296.775013] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 296.775266] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  296.776784] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  296.777286] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  296.778257] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  296.779198] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  296.780203] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc3a2e610
[  296.781142] R13: ffffaa568026be08 R14: ffff952cc3a2eb80 R15: ffff952cc39f0050
[  296.782106] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  296.783137] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  296.783796] CR2: 000055d578a349e8 CR3: 0000000036460005 CR4: 0000000000770ef0
[  296.784587] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  296.785424] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  296.786217] PKRU: 55555554
[  296.786535] Call Trace:
[  296.786871]  <TASK>
[  296.787107] ? __warn (kernel/panic.c:677) 
[  296.787376] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.787741] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  296.788124] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  296.788506] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  296.788856] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  296.789201] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  296.789683] br_dev_delete (net/bridge/br_if.c:396) 
[  296.790092] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  296.790454] cleanup_net (net/core/net_namespace.c:630) 
[  296.790925] ? process_one_work (kernel/workqueue.c:2606) 
[  296.791557] process_one_work (kernel/workqueue.c:2633) 
[  296.792113] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  296.792622] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  296.793234] kthread (kernel/kthread.c:388) 
[  296.793731] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.794255] ret_from_fork (arch/x86/kernel/process.c:147) 
[  296.794754] ? __pfx_kthread (kernel/kthread.c:341) 
[  296.795269] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  305.498106] ------------[ cut here ]------------
| [  305.498742] sysfs group 'bridge' not found for kobject 'br0'
| [  305.499203] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  305.500165] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  305.502458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  305.504322] Workqueue: netns cleanup_net
[  305.505001] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 305.505902] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  305.508207] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  305.508737] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  305.509380] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  305.510109] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  305.510807] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a66610
[  305.511434] R13: ffffaa568026be08 R14: ffff952cc2a66b80 R15: ffff952cc3892e50
[  305.512107] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  305.512682] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  305.512981] CR2: 00007f4fd3a6d000 CR3: 0000000036460002 CR4: 0000000000770ef0
[  305.513404] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  305.513776] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  305.514136] PKRU: 55555554
[  305.514278] Call Trace:
[  305.514410]  <TASK>
[  305.514527] ? __warn (kernel/panic.c:677) 
[  305.514711] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.514933] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  305.515131] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  305.515316] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  305.515518] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  305.515766] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.516051] br_dev_delete (net/bridge/br_if.c:396) 
[  305.516303] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  305.516646] cleanup_net (net/core/net_namespace.c:630) 
[  305.516940] ? process_one_work (kernel/workqueue.c:2606) 
[  305.517267] process_one_work (kernel/workqueue.c:2633) 
[  305.517586] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  305.517892] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  305.518228] kthread (kernel/kthread.c:388) 
[  305.518484] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.518788] ret_from_fork (arch/x86/kernel/process.c:147) 
[  305.519075] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.519370] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  305.654911] ------------[ cut here ]------------
| [  305.655337] sysfs group 'bridge' not found for kobject 'br0'
| [  305.655850] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  305.656365] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  305.657506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  305.658092] Workqueue: netns cleanup_net
[  305.658372] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 305.658787] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  305.660052] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  305.660494] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  305.661094] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  305.661683] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  305.662278] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc260e610
[  305.662873] R13: ffffaa568026be08 R14: ffff952cc260eb80 R15: ffffffffbb478f90
[  305.663474] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  305.664156] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  305.664684] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  305.665284] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  305.665948] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  305.666554] PKRU: 55555554
[  305.666792] Call Trace:
[  305.667009]  <TASK>
[  305.667226] ? __warn (kernel/panic.c:677) 
[  305.667459] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.667833] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  305.668107] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  305.668489] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  305.668948] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  305.669450] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.669923] br_dev_delete (net/bridge/br_if.c:396) 
[  305.670307] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  305.670727] cleanup_net (net/core/net_namespace.c:630) 
[  305.671062] ? process_one_work (kernel/workqueue.c:2606) 
[  305.671285] process_one_work (kernel/workqueue.c:2633) 
[  305.671517] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  305.671745] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  305.672019] kthread (kernel/kthread.c:388) 
[  305.672190] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.672419] ret_from_fork (arch/x86/kernel/process.c:147) 
[  305.672612] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.672816] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  305.675360] ------------[ cut here ]------------
| [  305.675599] sysfs group 'bridge' not found for kobject 'br0'
| [  305.675912] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  305.676328] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  305.677237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  305.677826] Workqueue: netns cleanup_net
[  305.678037] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 305.678292] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  305.679249] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  305.679522] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  305.679909] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  305.680278] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  305.680645] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a60610
[  305.681022] R13: ffffaa568026be08 R14: ffff952cc2a60b80 R15: ffffffffbb478f90
[  305.681390] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  305.681815] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  305.682116] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  305.682483] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  305.682859] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  305.683226] PKRU: 55555554
[  305.683372] Call Trace:
[  305.683506]  <TASK>
[  305.683627] ? __warn (kernel/panic.c:677) 
[  305.683810] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.684033] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  305.684232] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  305.684422] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  305.684626] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  305.684855] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.685077] br_dev_delete (net/bridge/br_if.c:396) 
[  305.685269] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  305.685497] cleanup_net (net/core/net_namespace.c:630) 
[  305.685698] ? process_one_work (kernel/workqueue.c:2606) 
[  305.685920] process_one_work (kernel/workqueue.c:2633) 
[  305.686133] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  305.686332] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  305.686559] kthread (kernel/kthread.c:388) 
[  305.686736] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.686935] ret_from_fork (arch/x86/kernel/process.c:147) 
[  305.687124] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.687322] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  305.689915] ------------[ cut here ]------------
| [  305.690154] sysfs group 'bridge' not found for kobject 'br0'
| [  305.690456] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  305.690869] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  305.691751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  305.692326] Workqueue: netns cleanup_net
[  305.692534] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 305.692791] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  305.693724] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  305.693996] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  305.694356] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  305.694723] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  305.695086] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[  305.695449] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffffffffbb478f90
[  305.695819] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  305.696226] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  305.696521] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  305.696893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  305.697255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  305.697614] PKRU: 55555554
[  305.697769] Call Trace:
[  305.697901]  <TASK>
[  305.698018] ? __warn (kernel/panic.c:677) 
[  305.698191] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.698409] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  305.698603] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  305.698798] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  305.699000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  305.699223] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  305.699442] br_dev_delete (net/bridge/br_if.c:396) 
[  305.699631] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  305.699880] cleanup_net (net/core/net_namespace.c:630) 
[  305.700073] ? process_one_work (kernel/workqueue.c:2606) 
[  305.700290] process_one_work (kernel/workqueue.c:2633) 
[  305.700505] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  305.700710] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  305.700934] kthread (kernel/kthread.c:388) 
[  305.701101] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.701298] ret_from_fork (arch/x86/kernel/process.c:147) 
[  305.701488] ? __pfx_kthread (kernel/kthread.c:341) 
[  305.701693] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  314.785923] ------------[ cut here ]------------
| [  314.786372] sysfs group 'bridge' not found for kobject 'br0'
| [  314.786891] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  314.787595] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  314.789070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  314.790045] Workqueue: netns cleanup_net
[  314.790371] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 314.790771] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  314.792230] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  314.792677] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  314.793201] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  314.793759] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  314.794253] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b80610
[  314.794641] R13: ffffaa568026be08 R14: ffff952cc4b80b80 R15: ffff952cc39f0050
[  314.795068] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  314.795581] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  314.795947] CR2: 00007fff9ffa6588 CR3: 0000000002808001 CR4: 0000000000770ef0
[  314.796419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  314.796792] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  314.797355] PKRU: 55555554
[  314.797609] Call Trace:
[  314.797923]  <TASK>
[  314.798179] ? __warn (kernel/panic.c:677) 
[  314.798439] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.798852] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  314.799285] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  314.799739] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  314.800264] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  314.800852] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.801401] br_dev_delete (net/bridge/br_if.c:396) 
[  314.801892] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  314.802464] cleanup_net (net/core/net_namespace.c:630) 
[  314.802966] ? process_one_work (kernel/workqueue.c:2606) 
[  314.803521] process_one_work (kernel/workqueue.c:2633) 
[  314.804076] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  314.804571] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  314.805117] kthread (kernel/kthread.c:388) 
[  314.805534] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.806006] ret_from_fork (arch/x86/kernel/process.c:147) 
[  314.806487] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.806918] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  314.900095] ------------[ cut here ]------------
| [  314.900456] sysfs group 'bridge' not found for kobject 'br0'
| [  314.900812] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  314.901320] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  314.902264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  314.903193] Workqueue: netns cleanup_net
[  314.903413] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 314.903832] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  314.906037] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  314.906732] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  314.907662] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  314.908589] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  314.909550] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b4610
[  314.910459] R13: ffffaa568026be08 R14: ffff952cc49b4b80 R15: ffff952cc39f1750
[  314.911319] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  314.912257] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  314.912944] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  314.913735] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  314.914338] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  314.914779] PKRU: 55555554
[  314.914925] Call Trace:
[  314.915086]  <TASK>
[  314.915215] ? __warn (kernel/panic.c:677) 
[  314.915416] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.915717] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  314.916013] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  314.916200] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  314.916401] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  314.916627] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.916853] br_dev_delete (net/bridge/br_if.c:396) 
[  314.917159] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  314.917565] cleanup_net (net/core/net_namespace.c:630) 
[  314.917768] ? process_one_work (kernel/workqueue.c:2606) 
[  314.918079] process_one_work (kernel/workqueue.c:2633) 
[  314.918407] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  314.918794] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  314.919210] kthread (kernel/kthread.c:388) 
[  314.919517] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.919894] ret_from_fork (arch/x86/kernel/process.c:147) 
[  314.920250] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.920630] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  314.926797] ------------[ cut here ]------------
| [  314.927273] sysfs group 'bridge' not found for kobject 'br0'
| [  314.927971] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  314.928712] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  314.930186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  314.930767] Workqueue: netns cleanup_net
[  314.931003] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 314.931340] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  314.932815] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  314.933221] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  314.933685] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  314.934194] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  314.934801] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a64610
[  314.935444] R13: ffffaa568026be08 R14: ffff952cc2a64b80 R15: ffff952cc39f1750
[  314.936057] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  314.936768] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  314.937256] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  314.937899] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  314.938504] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  314.939154] PKRU: 55555554
[  314.939397] Call Trace:
[  314.939648]  <TASK>
[  314.939863] ? __warn (kernel/panic.c:677) 
[  314.940155] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.940509] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  314.940849] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  314.941232] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  314.941534] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  314.941768] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  314.942001] br_dev_delete (net/bridge/br_if.c:396) 
[  314.942245] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  314.942476] cleanup_net (net/core/net_namespace.c:630) 
[  314.942678] ? process_one_work (kernel/workqueue.c:2606) 
[  314.942898] process_one_work (kernel/workqueue.c:2633) 
[  314.943136] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  314.943405] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  314.943788] kthread (kernel/kthread.c:388) 
[  314.943983] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.944201] ret_from_fork (arch/x86/kernel/process.c:147) 
[  314.944488] ? __pfx_kthread (kernel/kthread.c:341) 
[  314.944817] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  315.070907] ------------[ cut here ]------------
| [  315.071356] sysfs group 'bridge' not found for kobject 'br0'
| [  315.071707] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  315.072220] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  315.073473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  315.074423] Workqueue: netns cleanup_net
[  315.074811] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 315.075323] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  315.077001] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  315.077467] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  315.078090] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  315.078709] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  315.079301] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc49b2610
[  315.079990] R13: ffffaa568026be08 R14: ffff952cc49b2b80 R15: ffff952cc39f5c50
[  315.080590] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  315.081209] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  315.081646] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  315.082201] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  315.082779] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  315.083379] PKRU: 55555554
[  315.083539] Call Trace:
[  315.083751]  <TASK>
[  315.083948] ? __warn (kernel/panic.c:677) 
[  315.084189] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  315.084548] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  315.084816] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  315.085012] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  315.085215] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  315.085461] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  315.085711] br_dev_delete (net/bridge/br_if.c:396) 
[  315.085975] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  315.086206] cleanup_net (net/core/net_namespace.c:630) 
[  315.086402] ? process_one_work (kernel/workqueue.c:2606) 
[  315.086621] process_one_work (kernel/workqueue.c:2633) 
[  315.086846] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  315.087089] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  315.087331] kthread (kernel/kthread.c:388) 
[  315.087503] ? __pfx_kthread (kernel/kthread.c:341) 
[  315.087712] ret_from_fork (arch/x86/kernel/process.c:147) 
[  315.087912] ? __pfx_kthread (kernel/kthread.c:341) 
[  315.088127] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.063055] ------------[ cut here ]------------
| [  324.063332] sysfs group 'bridge' not found for kobject 'br0'
| [  324.063670] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.064392] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  324.066056] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.066706] Workqueue: netns cleanup_net
[  324.066969] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.067323] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  324.068315] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  324.068754] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  324.069145] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  324.069527] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  324.070206] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfe610
[  324.070852] R13: ffffaa568026be08 R14: ffff952cc4bfeb80 R15: ffff952cc2b60050
[  324.071832] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  324.073078] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.073988] CR2: 00007f4d36fca270 CR3: 0000000036460001 CR4: 0000000000770ef0
[  324.075088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.076026] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.076822] PKRU: 55555554
[  324.077101] Call Trace:
[  324.077433]  <TASK>
[  324.077746] ? __warn (kernel/panic.c:677) 
[  324.078193] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.078803] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  324.079295] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  324.079736] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  324.080211] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  324.080778] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.081327] br_dev_delete (net/bridge/br_if.c:396) 
[  324.081772] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  324.082346] cleanup_net (net/core/net_namespace.c:630) 
[  324.082770] ? process_one_work (kernel/workqueue.c:2606) 
[  324.083176] process_one_work (kernel/workqueue.c:2633) 
[  324.083535] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  324.083881] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  324.084162] kthread (kernel/kthread.c:388) 
[  324.084331] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.084529] ret_from_fork (arch/x86/kernel/process.c:147) 
[  324.084757] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.084959] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.224888] ------------[ cut here ]------------
| [  324.225367] sysfs group 'bridge' not found for kobject 'br0'
| [  324.225951] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.226789] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  324.228242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.228964] Workqueue: netns cleanup_net
[  324.229208] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.229670] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  324.230756] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  324.231222] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  324.231764] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  324.232342] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  324.233074] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc21be610
[  324.233858] R13: ffffaa568026be08 R14: ffff952cc21beb80 R15: ffffffffbb478f90
[  324.234701] FS:  0000000000000000(0000) GS:ffff952cfed80000(0000) knlGS:0000000000000000
[  324.235620] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.236223] CR2: 00007fff9ffa6588 CR3: 0000000036460001 CR4: 0000000000770ef0
[  324.236939] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.237729] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.238522] PKRU: 55555554
[  324.238878] Call Trace:
[  324.239177]  <TASK>
[  324.239451] ? __warn (kernel/panic.c:677) 
[  324.239824] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.240242] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  324.240577] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  324.240926] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  324.241272] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  324.241679] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.242058] br_dev_delete (net/bridge/br_if.c:396) 
[  324.242425] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  324.242779] cleanup_net (net/core/net_namespace.c:630) 
[  324.243138] ? process_one_work (kernel/workqueue.c:2606) 
[  324.243493] process_one_work (kernel/workqueue.c:2633) 
[  324.243847] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  324.244061] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  324.244313] kthread (kernel/kthread.c:388) 
[  324.244515] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.244790] ret_from_fork (arch/x86/kernel/process.c:147) 
[  324.244982] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.245187] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.247814] ------------[ cut here ]------------
| [  324.248086] sysfs group 'bridge' not found for kobject 'br0'
| [  324.248402] WARNING: CPU: 1 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.248881] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  324.249987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.250564] Workqueue: netns cleanup_net
[  324.250789] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.251039] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  324.251976] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  324.252246] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  324.252607] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  324.252984] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  324.253347] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a62610
[  324.253725] R13: ffffaa568026be08 R14: ffff952cc2a62b80 R15: ffffffffbb478f90
[  324.254088] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  324.254495] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.254803] CR2: 00007f3a8c6a4000 CR3: 0000000036460003 CR4: 0000000000770ef0
[  324.255168] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.255529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.255903] PKRU: 55555554
[  324.256048] Call Trace:
[  324.256182]  <TASK>
[  324.256333] ? __warn (kernel/panic.c:677) 
[  324.256557] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.256876] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  324.257103] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  324.257325] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  324.257585] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  324.257901] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.258201] br_dev_delete (net/bridge/br_if.c:396) 
[  324.258474] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  324.258814] cleanup_net (net/core/net_namespace.c:630) 
[  324.259097] ? process_one_work (kernel/workqueue.c:2606) 
[  324.259415] process_one_work (kernel/workqueue.c:2633) 
[  324.259741] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  324.260025] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  324.260346] kthread (kernel/kthread.c:388) 
[  324.260591] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.260892] ret_from_fork (arch/x86/kernel/process.c:147) 
[  324.261138] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.261423] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  324.264413] ------------[ cut here ]------------
| [  324.264701] sysfs group 'bridge' not found for kobject 'br0'
| [  324.265016] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  324.265432] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  324.266328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  324.266915] Workqueue: netns cleanup_net
[  324.267125] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 324.267377] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  324.268322] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  324.268593] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  324.268964] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  324.269330] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  324.269710] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4bfa610
[  324.270075] R13: ffffaa568026be08 R14: ffff952cc4bfab80 R15: ffffffffbb478f90
[  324.270445] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  324.270867] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  324.271165] CR2: 000055d5779cfdec CR3: 0000000002808006 CR4: 0000000000770ef0
[  324.271532] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  324.271904] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  324.272271] PKRU: 55555554
[  324.272417] Call Trace:
[  324.272553]  <TASK>
[  324.272678] ? __warn (kernel/panic.c:677) 
[  324.272856] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.273080] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  324.273281] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  324.273471] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  324.273699] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  324.273927] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  324.274148] br_dev_delete (net/bridge/br_if.c:396) 
[  324.274344] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  324.274578] cleanup_net (net/core/net_namespace.c:630) 
[  324.274781] ? process_one_work (kernel/workqueue.c:2606) 
[  324.275002] process_one_work (kernel/workqueue.c:2633) 
[  324.275215] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  324.275417] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  324.275643] kthread (kernel/kthread.c:388) 
[  324.275822] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.276022] ret_from_fork (arch/x86/kernel/process.c:147) 
[  324.276216] ? __pfx_kthread (kernel/kthread.c:341) 
[  324.276415] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  333.315115] ------------[ cut here ]------------
| [  333.315699] sysfs group 'bridge' not found for kobject 'br0'
| [  333.316165] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  333.316986] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  333.318779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  333.319776] Workqueue: netns cleanup_net
[  333.320116] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 333.320516] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  333.322351] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  333.322632] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  333.323100] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  333.323644] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  333.324193] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc2a66610
[  333.324628] R13: ffffaa568026be08 R14: ffff952cc2a66b80 R15: ffff952cc3962e50
[  333.325252] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  333.325682] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  333.325981] CR2: 00007fff9ffa6588 CR3: 0000000002808003 CR4: 0000000000770ef0
[  333.326736] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  333.327351] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  333.327970] PKRU: 55555554
[  333.328318] Call Trace:
[  333.328569]  <TASK>
[  333.328834] ? __warn (kernel/panic.c:677) 
[  333.329243] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  333.329802] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  333.330382] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  333.330889] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  333.331336] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  333.331793] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  333.332235] br_dev_delete (net/bridge/br_if.c:396) 
[  333.332705] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  333.333106] cleanup_net (net/core/net_namespace.c:630) 
[  333.333525] ? process_one_work (kernel/workqueue.c:2606) 
[  333.334069] process_one_work (kernel/workqueue.c:2633) 
[  333.334551] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  333.335266] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  333.335765] kthread (kernel/kthread.c:388) 
[  333.336084] ? __pfx_kthread (kernel/kthread.c:341) 
[  333.336607] ret_from_fork (arch/x86/kernel/process.c:147) 
[  333.337225] ? __pfx_kthread (kernel/kthread.c:341) 
[  333.337851] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  333.467919] ------------[ cut here ]------------
| [  333.468244] sysfs group 'bridge' not found for kobject 'br0'
| [  333.468558] WARNING: CPU: 2 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  333.469095] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  333.471124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  333.472995] Workqueue: netns cleanup_net
[  333.473564] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 333.474226] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd b2 b9 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd b2 b9 	mov    $0xffffffffb9b2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[  333.476340] RSP: 0018:ffffaa568026bd70 EFLAGS: 00010286
[  333.476883] RAX: 0000000000000000 RBX: ffffffffb97472c0 RCX: 00000000ffffdfff
[  333.477716] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  333.478388] RBP: 0000000000000000 R08: ffffffffb9f78508 R09: 00000000ffffdfff
[  333.479101] R10: ffffffffb9e98520 R11: ffffffffb9f48520 R12: ffff952cc4b84610
[  333.479795] R13: ffffaa568026be08 R14: ffff952cc4b84b80 R15: ffffffffbb478f90
[  333.480447] FS:  0000000000000000(0000) GS:ffff952cfed00000(0000) knlGS:0000000000000000
[  333.481301] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  333.481709] CR2: 00007fff9ffa6588 CR3: 0000000036460004 CR4: 0000000000770ef0
[  333.482157] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  333.482714] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  333.483182] PKRU: 55555554
[  333.483328] Call Trace:
[  333.483473]  <TASK>
[  333.483680] ? __warn (kernel/panic.c:677) 
[  333.483978] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  333.484366] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  333.484566] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  333.484912] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  333.485244] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  333.485695] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  333.486082] br_dev_delete (net/bridge/br_if.c:396) 
[  333.486461] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  333.486916] cleanup_net (net/core/net_namespace.c:630) 
[  333.487275] ? process_one_work (kernel/workqueue.c:2606) 
[  333.487751] process_one_work (kernel/workqueue.c:2633) 
[  333.488145] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  333.488549] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  333.489019] kthread (kernel/kthread.c:388) 
[  333.489371] ? __pfx_kthread (kernel/kthread.c:341) 
[  333.489825] ret_from_fork (arch/x86/kernel/process.c:147) 
[  333.490194] ? __pfx_kthread (kernel/kthread.c:341) 
[  333.490602] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  333.496353] #PF: supervisor read access in kernel mode
| [  333.496819] #PF: error_code(0x0000) - not-present page
| [  333.497264] PGD 37c01067 P4D 37c01067 PUD 0
| [  333.497490] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  333.498248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  333.498827] Workqueue: netns cleanup_net
[  333.499039] RIP: 0010:string (lib/vsprintf.c:646 lib/vsprintf.c:728) 
[ 333.499242] Code: ff 77 36 45 89 d1 31 f6 49 01 f9 66 45 85 d2 75 19 eb 1e 49 39 f8 76 02 88 07 48 83 c7 01 83 c6 01 48 83 c2 01 4c 39 cf 74 07 <0f> b6 02 84 c0 75 e2 4c 89 c2 e9 f8 e0 ff ff 48 c7 c0 a0 87 af b9
All code
========
   0:	ff 77 36             	push   0x36(%rdi)
   3:	45 89 d1             	mov    %r10d,%r9d
   6:	31 f6                	xor    %esi,%esi
   8:	49 01 f9             	add    %rdi,%r9
   b:	66 45 85 d2          	test   %r10w,%r10w
   f:	75 19                	jne    0x2a
  11:	eb 1e                	jmp    0x31
  13:	49 39 f8             	cmp    %rdi,%r8
  16:	76 02                	jbe    0x1a
  18:	88 07                	mov    %al,(%rdi)
  1a:	48 83 c7 01          	add    $0x1,%rdi
  1e:	83 c6 01             	add    $0x1,%esi
  21:	48 83 c2 01          	add    $0x1,%rdx
  25:	4c 39 cf             	cmp    %r9,%rdi
  28:	74 07                	je     0x31
  2a:*	0f b6 02             	movzbl (%rdx),%eax		<-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	75 e2                	jne    0x13
  31:	4c 89 c2             	mov    %r8,%rdx
  34:	e9 f8 e0 ff ff       	jmp    0xffffffffffffe131
  39:	48 c7 c0 a0 87 af b9 	mov    $0xffffffffb9af87a0,%rax

Code starting with the faulting instruction
===========================================
   0:	0f b6 02             	movzbl (%rdx),%eax
   3:	84 c0                	test   %al,%al
   5:	75 e2                	jne    0xffffffffffffffe9
   7:	4c 89 c2             	mov    %r8,%rdx
   a:	e9 f8 e0 ff ff       	jmp    0xffffffffffffe107
   f:	48 c7 c0 a0 87 af b9 	mov    $0xffffffffb9af87a0,%rax
[  333.500220] RSP: 0018:ffffaa568026bb68 EFLAGS: 00010086
[  333.500490] RAX: ffff952bfffff100 RBX: ffffaa568026bc38 RCX: ffff0a00ffffff04
[  333.500854] RDX: ffff952c00000100 RSI: 0000000000000000 RDI: ffffaa568026bc5c
[  333.501210] RBP: ffffffffb9bace66 R08: ffffaa568026bc58 R09: ffffaa578026bc5b
[  333.501583] R10: ffffffffffffffff R11: ffffffffb9f48520 R12: ffffaa568026bc58
[  333.501959] R13: ffffffffb9bace66 R14: 0000000000000008 R15: ffffaa568026bc5c
[  333.502319] FS:  0000000000000000(0000) GS:ffff952cfec80000(0000) knlGS:0000000000000000
[  333.502731] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  333.503027] CR2: ffff952c00000100 CR3: 000000000572e002 CR4: 0000000000770ef0
[  333.503395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  333.503762] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  333.504123] PKRU: 55555554
[  333.504263] Call Trace:
[  333.504394]  <TASK>
[  333.504506] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) 
[  333.504673] ? page_fault_oops (arch/x86/mm/fault.c:707) 
[  333.504883] ? fixup_exception (arch/x86/mm/extable.c:254) 
[  333.505092] ? exc_page_fault (arch/x86/mm/fault.c:1505 arch/x86/mm/fault.c:1563) 
[  333.505294] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:570) 
[  333.505511] ? string (lib/vsprintf.c:646 lib/vsprintf.c:728) 
[  333.505681] vsnprintf (lib/vsprintf.c:2774) 
[  333.505862] vprintk_store (kernel/printk/printk.c:2194) 
[  333.506063] ? console_unlock (kernel/printk/printk.c:3055) 
[  333.506269] ? vprintk_emit (./arch/x86/include/asm/preempt.h:94 kernel/printk/printk.c:2304) 
[  333.506462] vprintk_emit (kernel/printk/printk.c:2284) 
[  333.506647] __warn_printk (./include/linux/context_tracking.h:153 kernel/panic.c:726) 
[  333.506846] kobject_put (lib/kobject.c:730 (discriminator 1)) 
[  333.507029] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[  333.507219] br_dev_delete (net/bridge/br_if.c:396) 
[  333.507411] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  333.507640] cleanup_net (net/core/net_namespace.c:630) 
[  333.507834] ? process_one_work (kernel/workqueue.c:2606) 
[  333.508049] process_one_work (kernel/workqueue.c:2633) 
[  333.508259] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  333.508452] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  333.508681] kthread (kernel/kthread.c:388) 
[  333.508853] ? __pfx_kthread (kernel/kthread.c:341) 
[  333.509052] ret_from_fork (arch/x86/kernel/process.c:147) 
[  333.509247] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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string:vsnprintf:vprintk_store:vprintk_emit