======================================
| [    9.950043] ------------[ cut here ]------------
| [    9.950474] refcount_t: underflow; use-after-free.
| [    9.950902] WARNING: CPU: 1 PID: 10 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [    9.951613] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.952736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.953619] Workqueue: netns cleanup_net
[    9.953955] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 9.954403] 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 e8 37 93 b3 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 e8 37 93 b3 	mov    $0xffffffffb39337e8,%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
[    9.955824] RSP: 0018:ffff9c494005bd78 EFLAGS: 00010286
[    9.956277] RAX: 0000000000000000 RBX: ffff8eb7421f2000 RCX: 00000000ffffdfff
[    9.956655] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.957056] RBP: ffff8eb7421f2610 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[    9.957515] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f2000
[    9.957948] R13: ffff9c494005be08 R14: ffff8eb7421f2b80 R15: ffff8eb7418c1750
[    9.958429] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[    9.958888] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.959181] CR2: 00007f0b04d5e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[    9.959624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.960165] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.960548] PKRU: 55555554
[    9.960778] Call Trace:
[    9.960983]  <TASK>
[    9.961193] ? __warn (kernel/panic.c:677) 
[    9.961536] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.962006] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.962299] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.962652] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.963035] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.963441] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.963906] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[    9.964348] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[    9.964718] br_dev_delete (net/bridge/br_if.c:396) 
[    9.965066] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.965501] cleanup_net (net/core/net_namespace.c:630) 
[    9.965889] ? process_one_work (kernel/workqueue.c:2606) 
[    9.966288] process_one_work (kernel/workqueue.c:2633) 
[    9.966623] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.966976] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.967333] kthread (kernel/kthread.c:388) 
[    9.967614] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.967957] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.968287] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.968569] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [    9.971426] ------------[ cut here ]------------
| [    9.971721] sysfs group 'bridge' not found for kobject 'br0'
| [    9.972175] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [    9.972593] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[    9.973507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    9.974424] Workqueue: netns cleanup_net
[    9.974685] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 9.975051] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[    9.976340] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[    9.976776] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[    9.977366] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    9.977964] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[    9.978586] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f2610
[    9.979167] R13: ffff9c494005be08 R14: ffff8eb7421f2b80 R15: ffff8eb7418c1750
[    9.979769] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[    9.980459] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.980941] CR2: 00007f0b04d5e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[    9.981546] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.982146] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.982740] PKRU: 55555554
[    9.982961] Call Trace:
[    9.983171]  <TASK>
[    9.983304] ? __warn (kernel/panic.c:677) 
[    9.983474] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.983709] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[    9.983952] ? handle_bug (arch/x86/kernel/traps.c:238) 
[    9.984137] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[    9.984335] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    9.984565] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[    9.984781] br_dev_delete (net/bridge/br_if.c:396) 
[    9.984978] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[    9.985264] cleanup_net (net/core/net_namespace.c:630) 
[    9.985488] ? process_one_work (kernel/workqueue.c:2606) 
[    9.985832] process_one_work (kernel/workqueue.c:2633) 
[    9.986113] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    9.986309] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    9.986610] kthread (kernel/kthread.c:388) 
[    9.986879] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.987241] ret_from_fork (arch/x86/kernel/process.c:147) 
[    9.987596] ? __pfx_kthread (kernel/kthread.c:341) 
[    9.987961] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   10.124717] ------------[ cut here ]------------
| [   10.124967] sysfs group 'bridge' not found for kobject 'br0'
| [   10.125284] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   10.125705] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   10.126442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   10.127021] Workqueue: netns cleanup_net
[   10.127237] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 10.127483] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   10.128413] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   10.128689] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   10.129047] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   10.129420] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   10.129786] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742700610
[   10.130146] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffffffffb5278f90
[   10.130509] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   10.130926] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.131219] CR2: 00007f0b04d5e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   10.131589] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.131947] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.132302] PKRU: 55555554
[   10.132445] Call Trace:
[   10.132587]  <TASK>
[   10.132704] ? __warn (kernel/panic.c:677) 
[   10.132888] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.133103] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   10.133297] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   10.133480] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   10.133688] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   10.133909] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.134125] br_dev_delete (net/bridge/br_if.c:396) 
[   10.134315] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   10.134553] cleanup_net (net/core/net_namespace.c:630) 
[   10.134744] ? process_one_work (kernel/workqueue.c:2606) 
[   10.134961] process_one_work (kernel/workqueue.c:2633) 
[   10.135171] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   10.135367] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   10.135596] kthread (kernel/kthread.c:388) 
[   10.135763] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.135959] ret_from_fork (arch/x86/kernel/process.c:147) 
[   10.136148] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.136342] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   10.138806] ------------[ cut here ]------------
| [   10.139043] sysfs group 'bridge' not found for kobject 'br0'
| [   10.139340] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   10.139751] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   10.140479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   10.141053] Workqueue: netns cleanup_net
[   10.141255] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 10.141500] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   10.142426] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   10.142697] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   10.143061] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   10.143419] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   10.143781] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742706610
[   10.144139] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffffffffb5278f90
[   10.144497] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   10.144907] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.145197] CR2: 00007f0b04d5e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   10.145563] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.145923] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.146280] PKRU: 55555554
[   10.146422] Call Trace:
[   10.146562]  <TASK>
[   10.146678] ? __warn (kernel/panic.c:677) 
[   10.146848] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.147062] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   10.147256] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   10.147437] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   10.147646] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   10.147864] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.148081] br_dev_delete (net/bridge/br_if.c:396) 
[   10.148269] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   10.148494] cleanup_net (net/core/net_namespace.c:630) 
[   10.148692] ? process_one_work (kernel/workqueue.c:2606) 
[   10.148908] process_one_work (kernel/workqueue.c:2633) 
[   10.149117] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   10.149313] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   10.149542] kthread (kernel/kthread.c:388) 
[   10.149709] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.149905] ret_from_fork (arch/x86/kernel/process.c:147) 
[   10.150092] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.150286] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   10.152772] ------------[ cut here ]------------
| [   10.153007] sysfs group 'bridge' not found for kobject 'br0'
| [   10.153303] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   10.153715] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   10.154442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   10.155019] Workqueue: netns cleanup_net
[   10.155224] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 10.155468] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   10.156391] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   10.156668] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   10.157024] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   10.157379] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   10.157744] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d2610
[   10.158102] R13: ffff9c494005be08 R14: ffff8eb7445d2b80 R15: ffffffffb5278f90
[   10.158460] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   10.158868] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.159160] CR2: 00007f0b04d5e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   10.159518] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.159887] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.160244] PKRU: 55555554
[   10.160387] Call Trace:
[   10.160520]  <TASK>
[   10.160643] ? __warn (kernel/panic.c:677) 
[   10.160813] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.161027] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   10.161219] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   10.161402] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   10.161609] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   10.161830] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   10.162048] br_dev_delete (net/bridge/br_if.c:396) 
[   10.162235] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   10.162462] cleanup_net (net/core/net_namespace.c:630) 
[   10.162658] ? process_one_work (kernel/workqueue.c:2606) 
[   10.162903] process_one_work (kernel/workqueue.c:2633) 
[   10.163113] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   10.163308] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   10.163537] kthread (kernel/kthread.c:388) 
[   10.163704] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.163899] ret_from_fork (arch/x86/kernel/process.c:147) 
[   10.164087] ? __pfx_kthread (kernel/kthread.c:341) 
[   10.164282] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.311755] ------------[ cut here ]------------
| [   18.312241] sysfs group 'bridge' not found for kobject 'br0'
| [   18.312795] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.313462] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.314739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.315614] Workqueue: netns cleanup_net
[   18.315823] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.316107] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   18.317272] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   18.317683] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   18.318064] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.318432] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   18.318800] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d6610
[   18.319270] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb742e42e50
[   18.319750] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   18.320273] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.320593] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[   18.321176] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.321761] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.322345] PKRU: 55555554
[   18.322588] Call Trace:
[   18.322825]  <TASK>
[   18.323022] ? __warn (kernel/panic.c:677) 
[   18.323309] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.323662] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.323981] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.324313] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.324641] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.325010] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.325405] br_dev_delete (net/bridge/br_if.c:396) 
[   18.325699] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.326083] cleanup_net (net/core/net_namespace.c:630) 
[   18.326410] ? process_one_work (kernel/workqueue.c:2606) 
[   18.326779] process_one_work (kernel/workqueue.c:2633) 
[   18.327125] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.327447] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.327813] kthread (kernel/kthread.c:388) 
[   18.328105] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.328383] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.328696] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.328975] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.450731] ------------[ cut here ]------------
| [   18.451209] sysfs group 'bridge' not found for kobject 'br0'
| [   18.451737] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.452510] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.453813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.454785] Workqueue: netns cleanup_net
[   18.455177] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.455610] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   18.457155] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   18.457595] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   18.458178] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.458724] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   18.459334] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f6610
[   18.459920] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb742e41750
[   18.460372] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   18.460885] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.461297] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[   18.461706] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.462153] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.462766] PKRU: 55555554
[   18.462993] Call Trace:
[   18.463228]  <TASK>
[   18.463407] ? __warn (kernel/panic.c:677) 
[   18.463663] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.463994] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.464330] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.464586] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.464807] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.465183] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.465524] br_dev_delete (net/bridge/br_if.c:396) 
[   18.465842] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.466226] cleanup_net (net/core/net_namespace.c:630) 
[   18.466565] ? process_one_work (kernel/workqueue.c:2606) 
[   18.466947] process_one_work (kernel/workqueue.c:2633) 
[   18.467374] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.467731] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.468160] kthread (kernel/kthread.c:388) 
[   18.468458] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.468813] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.469151] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.469497] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.473513] ------------[ cut here ]------------
| [   18.473821] sysfs group 'bridge' not found for kobject 'br0'
| [   18.474128] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.474719] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.475700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.476670] Workqueue: netns cleanup_net
[   18.477024] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.477459] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   18.479074] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   18.479538] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   18.480129] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.480725] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   18.481306] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d4610
[   18.481923] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffff8eb742e41750
[   18.482536] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   18.483215] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.483650] CR2: 00007fef73a81000 CR3: 0000000036660003 CR4: 0000000000770ef0
[   18.484258] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.484892] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.485490] PKRU: 55555554
[   18.485748] Call Trace:
[   18.485914]  <TASK>
[   18.486123] ? __warn (kernel/panic.c:677) 
[   18.486384] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.486755] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.487102] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.487293] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.487493] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.487776] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.488040] br_dev_delete (net/bridge/br_if.c:396) 
[   18.488282] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.488598] cleanup_net (net/core/net_namespace.c:630) 
[   18.488829] ? process_one_work (kernel/workqueue.c:2606) 
[   18.489064] process_one_work (kernel/workqueue.c:2633) 
[   18.489297] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.489547] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.489849] kthread (kernel/kthread.c:388) 
[   18.490129] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.490420] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.490632] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.490925] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   18.611780] ------------[ cut here ]------------
| [   18.612047] sysfs group 'bridge' not found for kobject 'br0'
| [   18.612454] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   18.612918] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   18.613735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   18.614374] Workqueue: netns cleanup_net
[   18.614649] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 18.614918] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   18.615913] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   18.616273] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   18.616708] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   18.617113] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   18.617549] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421bc610
[   18.618006] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb74462ae50
[   18.618413] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   18.618849] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.619239] CR2: 00007ffd0044b8e8 CR3: 000000000444c002 CR4: 0000000000770ef0
[   18.619683] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.620098] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.620478] PKRU: 55555554
[   18.620696] Call Trace:
[   18.620890]  <TASK>
[   18.621066] ? __warn (kernel/panic.c:677) 
[   18.621287] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.621575] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   18.621858] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   18.622124] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   18.622371] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   18.622650] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   18.622952] br_dev_delete (net/bridge/br_if.c:396) 
[   18.623186] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   18.623441] cleanup_net (net/core/net_namespace.c:630) 
[   18.623707] ? process_one_work (kernel/workqueue.c:2606) 
[   18.624040] process_one_work (kernel/workqueue.c:2633) 
[   18.624300] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   18.624516] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   18.624787] kthread (kernel/kthread.c:388) 
[   18.625022] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.625277] ret_from_fork (arch/x86/kernel/process.c:147) 
[   18.625493] ? __pfx_kthread (kernel/kthread.c:341) 
[   18.625750] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.695912] ------------[ cut here ]------------
| [   26.696308] sysfs group 'bridge' not found for kobject 'br0'
| [   26.696780] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.697324] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.698708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.699799] Workqueue: netns cleanup_net
[   26.700189] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.700654] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   26.702420] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   26.702972] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   26.703596] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.704200] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   26.704830] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d6610
[   26.705460] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb742e41750
[   26.706072] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   26.706729] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.707030] CR2: 000055a96ba3cdec CR3: 000000000444c002 CR4: 0000000000770ef0
[   26.707430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.707803] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.708168] PKRU: 55555554
[   26.708311] Call Trace:
[   26.708442]  <TASK>
[   26.708572] ? __warn (kernel/panic.c:677) 
[   26.708751] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.708972] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.709166] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.709353] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.709561] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.709783] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.710002] br_dev_delete (net/bridge/br_if.c:396) 
[   26.710193] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.710422] cleanup_net (net/core/net_namespace.c:630) 
[   26.710627] ? process_one_work (kernel/workqueue.c:2606) 
[   26.710854] process_one_work (kernel/workqueue.c:2633) 
[   26.711072] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.711269] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.711492] kthread (kernel/kthread.c:388) 
[   26.711675] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.711879] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.712077] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.712275] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.819738] ------------[ cut here ]------------
| [   26.819994] sysfs group 'bridge' not found for kobject 'br0'
| [   26.820358] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.820799] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.821592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.822197] Workqueue: netns cleanup_net
[   26.822436] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.822730] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   26.823698] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   26.824025] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   26.824431] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.824818] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   26.825225] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[   26.825649] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb74462ae50
[   26.826054] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   26.826477] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.826817] CR2: 00007f31c186c000 CR3: 0000000036660001 CR4: 0000000000770ef0
[   26.827238] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.827650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.828033] PKRU: 55555554
[   26.828222] Call Trace:
[   26.828407]  <TASK>
[   26.828559] ? __warn (kernel/panic.c:677) 
[   26.828750] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.828997] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.829232] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.829461] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.829686] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.829940] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.830199] br_dev_delete (net/bridge/br_if.c:396) 
[   26.830420] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.830684] cleanup_net (net/core/net_namespace.c:630) 
[   26.830930] ? process_one_work (kernel/workqueue.c:2606) 
[   26.831189] process_one_work (kernel/workqueue.c:2633) 
[   26.831426] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.831649] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.831898] kthread (kernel/kthread.c:388) 
[   26.832121] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.832348] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.832564] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.832800] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.835641] ------------[ cut here ]------------
| [   26.835915] sysfs group 'bridge' not found for kobject 'br0'
| [   26.836260] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.836706] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.837516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.838134] Workqueue: netns cleanup_net
[   26.838410] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.838708] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   26.839670] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   26.839992] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   26.840387] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.840809] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   26.841207] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421be610
[   26.841607] R13: ffff9c494005be08 R14: ffff8eb7421beb80 R15: ffff8eb74462ae50
[   26.842001] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   26.842452] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.842827] CR2: 00007f31c186c000 CR3: 0000000036660001 CR4: 0000000000770ef0
[   26.843211] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.843599] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.844008] PKRU: 55555554
[   26.844191] Call Trace:
[   26.844382]  <TASK>
[   26.844526] ? __warn (kernel/panic.c:677) 
[   26.844722] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.844977] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.845210] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.845465] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.845708] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.845964] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.846235] br_dev_delete (net/bridge/br_if.c:396) 
[   26.846472] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.846745] cleanup_net (net/core/net_namespace.c:630) 
[   26.846968] ? process_one_work (kernel/workqueue.c:2606) 
[   26.847203] process_one_work (kernel/workqueue.c:2633) 
[   26.847446] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.847716] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.847972] kthread (kernel/kthread.c:388) 
[   26.848180] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.848402] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.848626] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.848873] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   26.968737] ------------[ cut here ]------------
| [   26.968982] sysfs group 'bridge' not found for kobject 'br0'
| [   26.969315] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   26.969768] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   26.970564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.971139] Workqueue: netns cleanup_net
[   26.971360] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 26.971637] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   26.972629] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   26.972941] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   26.973336] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   26.973738] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   26.974130] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d0610
[   26.974551] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffff8eb74462dc50
[   26.974950] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   26.975387] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.975725] CR2: 00007f31c186c000 CR3: 0000000036660001 CR4: 0000000000770ef0
[   26.976141] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.976536] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.976929] PKRU: 55555554
[   26.977074] Call Trace:
[   26.977208]  <TASK>
[   26.977362] ? __warn (kernel/panic.c:677) 
[   26.977614] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.977871] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   26.978111] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   26.978342] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   26.978588] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   26.978859] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   26.979120] br_dev_delete (net/bridge/br_if.c:396) 
[   26.979328] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   26.979600] cleanup_net (net/core/net_namespace.c:630) 
[   26.979833] ? process_one_work (kernel/workqueue.c:2606) 
[   26.980083] process_one_work (kernel/workqueue.c:2633) 
[   26.980326] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   26.980571] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   26.980845] kthread (kernel/kthread.c:388) 
[   26.981048] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.981269] ret_from_fork (arch/x86/kernel/process.c:147) 
[   26.981495] ? __pfx_kthread (kernel/kthread.c:341) 
[   26.981742] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.611831] ------------[ cut here ]------------
| [   34.612129] sysfs group 'bridge' not found for kobject 'br0'
| [   34.612469] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.612937] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.614295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.615302] Workqueue: netns cleanup_net
[   34.615693] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.616202] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   34.617994] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   34.618464] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   34.619043] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.619656] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   34.620275] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c8c610
[   34.620772] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb744628050
[   34.621181] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   34.621593] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.621910] CR2: 00007f569fece270 CR3: 0000000002c2a006 CR4: 0000000000770ef0
[   34.622275] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.622644] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.623009] PKRU: 55555554
[   34.623205] Call Trace:
[   34.623353]  <TASK>
[   34.623471] ? __warn (kernel/panic.c:677) 
[   34.623652] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.623869] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.624069] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.624261] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.624461] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.624689] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.624904] br_dev_delete (net/bridge/br_if.c:396) 
[   34.625105] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.625335] cleanup_net (net/core/net_namespace.c:630) 
[   34.625552] ? process_one_work (kernel/workqueue.c:2606) 
[   34.625793] process_one_work (kernel/workqueue.c:2633) 
[   34.626028] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.626283] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.626576] kthread (kernel/kthread.c:388) 
[   34.626823] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.627117] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.627409] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.627615] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.720716] ------------[ cut here ]------------
| [   34.721153] sysfs group 'bridge' not found for kobject 'br0'
| [   34.721665] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.722416] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.723676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.724617] Workqueue: netns cleanup_net
[   34.724914] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.725285] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   34.726742] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   34.727140] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   34.727516] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.727950] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   34.728466] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475a610
[   34.728875] R13: ffff9c494005be08 R14: ffff8eb74475ab80 R15: ffff8eb74462dc50
[   34.729242] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   34.729842] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.730327] CR2: 00007f569fece270 CR3: 0000000036660002 CR4: 0000000000770ef0
[   34.730825] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.731403] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.731809] PKRU: 55555554
[   34.731971] Call Trace:
[   34.732228]  <TASK>
[   34.732374] ? __warn (kernel/panic.c:677) 
[   34.732660] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.733039] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.733370] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.733681] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.734022] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.734386] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.734763] br_dev_delete (net/bridge/br_if.c:396) 
[   34.735071] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.735458] cleanup_net (net/core/net_namespace.c:630) 
[   34.735765] ? process_one_work (kernel/workqueue.c:2606) 
[   34.736156] process_one_work (kernel/workqueue.c:2633) 
[   34.736508] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.736838] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.737252] kthread (kernel/kthread.c:388) 
[   34.737514] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.737834] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.738176] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.738517] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.741477] ------------[ cut here ]------------
| [   34.741843] sysfs group 'bridge' not found for kobject 'br0'
| [   34.742373] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.743045] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.744359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.745364] Workqueue: netns cleanup_net
[   34.745718] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.746167] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   34.747734] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   34.748173] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   34.748767] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.749376] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   34.749936] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741934610
[   34.750494] R13: ffff9c494005be08 R14: ffff8eb741934b80 R15: ffff8eb74462dc50
[   34.750868] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   34.751333] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.751736] CR2: 00007f569fece270 CR3: 0000000036660002 CR4: 0000000000770ef0
[   34.752112] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.752668] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.753060] PKRU: 55555554
[   34.753232] Call Trace:
[   34.753462]  <TASK>
[   34.753589] ? __warn (kernel/panic.c:677) 
[   34.753904] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.754313] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.754640] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.754938] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.755319] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.755680] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.756029] br_dev_delete (net/bridge/br_if.c:396) 
[   34.756348] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.756728] cleanup_net (net/core/net_namespace.c:630) 
[   34.757080] ? process_one_work (kernel/workqueue.c:2606) 
[   34.757477] process_one_work (kernel/workqueue.c:2633) 
[   34.757850] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.758193] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.758574] kthread (kernel/kthread.c:388) 
[   34.758847] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.759188] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.759515] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.759816] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   34.888721] ------------[ cut here ]------------
| [   34.888973] sysfs group 'bridge' not found for kobject 'br0'
| [   34.889288] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   34.889733] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   34.890468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.891042] Workqueue: netns cleanup_net
[   34.891249] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 34.891494] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   34.892428] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   34.892707] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   34.893070] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   34.893426] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   34.893789] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744758610
[   34.894151] R13: ffff9c494005be08 R14: ffff8eb744758b80 R15: ffff8eb742e41750
[   34.894510] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   34.894923] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.895221] CR2: 00007f569fece270 CR3: 0000000036660002 CR4: 0000000000770ef0
[   34.895590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   34.895949] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   34.896311] PKRU: 55555554
[   34.896452] Call Trace:
[   34.896592]  <TASK>
[   34.896709] ? __warn (kernel/panic.c:677) 
[   34.896884] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.897100] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   34.897302] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   34.897487] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   34.897698] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   34.897919] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   34.898142] br_dev_delete (net/bridge/br_if.c:396) 
[   34.898333] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   34.898568] cleanup_net (net/core/net_namespace.c:630) 
[   34.898759] ? process_one_work (kernel/workqueue.c:2606) 
[   34.898976] process_one_work (kernel/workqueue.c:2633) 
[   34.899186] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   34.899381] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   34.899613] kthread (kernel/kthread.c:388) 
[   34.899788] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.899986] ret_from_fork (arch/x86/kernel/process.c:147) 
[   34.900177] ? __pfx_kthread (kernel/kthread.c:341) 
[   34.900372] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.571824] ------------[ cut here ]------------
| [   42.572233] sysfs group 'bridge' not found for kobject 'br0'
| [   42.572710] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.573324] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.574414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.575276] Workqueue: netns cleanup_net
[   42.575593] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.575959] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   42.577098] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   42.577457] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   42.577999] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.578544] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   42.579087] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec6610
[   42.579638] R13: ffff9c494005be08 R14: ffff8eb742ec6b80 R15: ffff8eb7418c5c50
[   42.580181] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   42.580800] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.581242] CR2: 00007f4a9c6b0000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[   42.581791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.582333] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.582890] PKRU: 55555554
[   42.583110] Call Trace:
[   42.583311]  <TASK>
[   42.583488] ? __warn (kernel/panic.c:677) 
[   42.583756] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.584084] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.584379] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.584666] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.584969] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.585307] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.585647] br_dev_delete (net/bridge/br_if.c:396) 
[   42.585935] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.586282] cleanup_net (net/core/net_namespace.c:630) 
[   42.586583] ? process_one_work (kernel/workqueue.c:2606) 
[   42.586913] process_one_work (kernel/workqueue.c:2633) 
[   42.587234] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.587526] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.587868] kthread (kernel/kthread.c:388) 
[   42.588114] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.588408] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.588709] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.589010] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.685902] ------------[ cut here ]------------
| [   42.686191] sysfs group 'bridge' not found for kobject 'br0'
| [   42.686570] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.687049] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.687898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.688597] Workqueue: netns cleanup_net
[   42.688830] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.689116] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   42.690098] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   42.690385] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   42.690757] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.691153] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   42.691589] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec0610
[   42.691979] R13: ffff9c494005be08 R14: ffff8eb742ec0b80 R15: ffff8eb742e41750
[   42.692463] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   42.692933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.693303] CR2: 00007fe1565a4000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   42.693730] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.694138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.694522] PKRU: 55555554
[   42.694702] Call Trace:
[   42.694887]  <TASK>
[   42.695028] ? __warn (kernel/panic.c:677) 
[   42.695233] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.695460] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.695682] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.695924] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.696167] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.696439] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.696704] br_dev_delete (net/bridge/br_if.c:396) 
[   42.696923] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.697198] cleanup_net (net/core/net_namespace.c:630) 
[   42.697434] ? process_one_work (kernel/workqueue.c:2606) 
[   42.697689] process_one_work (kernel/workqueue.c:2633) 
[   42.697944] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.698182] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.698454] kthread (kernel/kthread.c:388) 
[   42.698659] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.698906] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.699158] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.699398] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.702326] ------------[ cut here ]------------
| [   42.702602] sysfs group 'bridge' not found for kobject 'br0'
| [   42.702985] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.703469] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.704345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.704993] Workqueue: netns cleanup_net
[   42.705250] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.705573] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   42.706586] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   42.706912] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   42.707346] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.707771] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   42.708185] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741d46610
[   42.708648] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffff8eb742e41750
[   42.709064] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   42.709517] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.709830] CR2: 00007fe1565a4000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   42.710234] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.710631] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.711010] PKRU: 55555554
[   42.711178] Call Trace:
[   42.711336]  <TASK>
[   42.711485] ? __warn (kernel/panic.c:677) 
[   42.711683] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.711909] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.712137] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.712448] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.712695] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.712943] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.713220] br_dev_delete (net/bridge/br_if.c:396) 
[   42.713447] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.713724] cleanup_net (net/core/net_namespace.c:630) 
[   42.713933] ? process_one_work (kernel/workqueue.c:2606) 
[   42.714195] process_one_work (kernel/workqueue.c:2633) 
[   42.714465] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.714709] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.714963] kthread (kernel/kthread.c:388) 
[   42.715192] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.715442] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.715685] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.715902] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.840746] ------------[ cut here ]------------
| [   42.841014] sysfs group 'bridge' not found for kobject 'br0'
| [   42.841357] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.841812] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.842654] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.843258] Workqueue: netns cleanup_net
[   42.843502] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.843810] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   42.844768] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   42.845085] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   42.845495] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.845924] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   42.846327] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421bc610
[   42.846717] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb744629750
[   42.847116] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   42.847635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.847976] CR2: 00007fe1565a4000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   42.848357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.848768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.849178] PKRU: 55555554
[   42.849355] Call Trace:
[   42.849506]  <TASK>
[   42.849669] ? __warn (kernel/panic.c:677) 
[   42.849901] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.850155] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.850367] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.850609] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.850842] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.851096] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.851338] br_dev_delete (net/bridge/br_if.c:396) 
[   42.851577] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.851852] cleanup_net (net/core/net_namespace.c:630) 
[   42.852079] ? process_one_work (kernel/workqueue.c:2606) 
[   42.852314] process_one_work (kernel/workqueue.c:2633) 
[   42.852573] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.852834] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.853092] kthread (kernel/kthread.c:388) 
[   42.853286] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.853536] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.853797] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.854034] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.836799] ------------[ cut here ]------------
| [   50.837509] sysfs group 'bridge' not found for kobject 'br0'
| [   50.838615] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.839720] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.841354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.842661] Workqueue: netns cleanup_net
[   50.843062] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.843585] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   50.845490] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   50.846064] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   50.846744] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.847394] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   50.848056] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475e610
[   50.848638] R13: ffff9c494005be08 R14: ffff8eb74475eb80 R15: ffff8eb7418c4550
[   50.849046] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[   50.849700] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.850142] CR2: 00007f6caeac90e0 CR3: 0000000002d96002 CR4: 0000000000770ef0
[   50.850591] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.851064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.851746] PKRU: 55555554
[   50.851897] Call Trace:
[   50.852128]  <TASK>
[   50.852348] ? __warn (kernel/panic.c:677) 
[   50.852858] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.853373] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   50.853837] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   50.854368] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   50.854836] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   50.855464] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.855980] br_dev_delete (net/bridge/br_if.c:396) 
[   50.856423] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   50.856915] cleanup_net (net/core/net_namespace.c:630) 
[   50.857392] ? process_one_work (kernel/workqueue.c:2606) 
[   50.857883] process_one_work (kernel/workqueue.c:2633) 
[   50.858376] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   50.858793] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   50.859241] kthread (kernel/kthread.c:388) 
[   50.859636] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.860011] ret_from_fork (arch/x86/kernel/process.c:147) 
[   50.860406] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.860799] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.976712] ------------[ cut here ]------------
| [   50.977176] sysfs group 'bridge' not found for kobject 'br0'
| [   50.977731] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   50.978479] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   50.979849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   50.980890] Workqueue: netns cleanup_net
[   50.981246] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 50.981492] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   50.982493] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   50.982776] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   50.983137] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   50.983501] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   50.983937] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c8e610
[   50.984505] R13: ffff9c494005be08 R14: ffff8eb741c8eb80 R15: ffffffffb5278f90
[   50.984976] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   50.985707] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.986278] CR2: 00007ffd0044b8e8 CR3: 0000000036660002 CR4: 0000000000770ef0
[   50.987002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   50.987725] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   50.988426] PKRU: 55555554
[   50.988702] Call Trace:
[   50.988965]  <TASK>
[   50.989207] ? __warn (kernel/panic.c:677) 
[   50.989519] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.989959] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   50.990341] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   50.990696] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   50.991030] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   50.991405] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   50.991798] br_dev_delete (net/bridge/br_if.c:396) 
[   50.992158] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   50.992554] cleanup_net (net/core/net_namespace.c:630) 
[   50.992915] ? process_one_work (kernel/workqueue.c:2606) 
[   50.993270] process_one_work (kernel/workqueue.c:2633) 
[   50.993628] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   50.993971] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   50.994211] kthread (kernel/kthread.c:388) 
[   50.994394] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.994634] ret_from_fork (arch/x86/kernel/process.c:147) 
[   50.994867] ? __pfx_kthread (kernel/kthread.c:341) 
[   50.995187] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   50.998872] ------------[ cut here ]------------
| [   50.999310] sysfs group 'bridge' not found for kobject 'br0'
| [   50.999858] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   51.000622] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   51.001923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   51.002908] Workqueue: netns cleanup_net
[   51.003284] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 51.003726] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   51.005244] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   51.005701] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   51.006262] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   51.006860] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   51.007372] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c88610
[   51.007758] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffffffffb5278f90
[   51.008205] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   51.008611] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.008902] CR2: 00007ffd0044b8e8 CR3: 0000000036660002 CR4: 0000000000770ef0
[   51.009259] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.009620] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.009976] PKRU: 55555554
[   51.010118] Call Trace:
[   51.010248]  <TASK>
[   51.010363] ? __warn (kernel/panic.c:677) 
[   51.010541] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.010755] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   51.010947] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   51.011130] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   51.011328] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   51.011554] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.011768] br_dev_delete (net/bridge/br_if.c:396) 
[   51.011956] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   51.012184] cleanup_net (net/core/net_namespace.c:630) 
[   51.012372] ? process_one_work (kernel/workqueue.c:2606) 
[   51.012604] process_one_work (kernel/workqueue.c:2633) 
[   51.012815] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   51.013010] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   51.013230] kthread (kernel/kthread.c:388) 
[   51.013394] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.013595] ret_from_fork (arch/x86/kernel/process.c:147) 
[   51.013784] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.013978] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   51.016470] ------------[ cut here ]------------
| [   51.016753] sysfs group 'bridge' not found for kobject 'br0'
| [   51.017147] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   51.017715] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   51.018453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   51.019044] Workqueue: netns cleanup_net
[   51.019255] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 51.019500] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   51.020423] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   51.020694] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   51.021049] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   51.021411] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   51.021774] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475c610
[   51.022130] R13: ffff9c494005be08 R14: ffff8eb74475cb80 R15: ffffffffb5278f90
[   51.022493] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   51.022909] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.023207] CR2: 00007ffd0044b8e8 CR3: 0000000036660002 CR4: 0000000000770ef0
[   51.023567] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.023924] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.024285] PKRU: 55555554
[   51.024426] Call Trace:
[   51.024565]  <TASK>
[   51.024681] ? __warn (kernel/panic.c:677) 
[   51.024852] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.025068] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   51.025275] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   51.025458] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   51.025664] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   51.025883] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   51.026098] br_dev_delete (net/bridge/br_if.c:396) 
[   51.026292] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   51.026519] cleanup_net (net/core/net_namespace.c:630) 
[   51.026721] ? process_one_work (kernel/workqueue.c:2606) 
[   51.026937] process_one_work (kernel/workqueue.c:2633) 
[   51.027152] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   51.027348] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   51.027576] kthread (kernel/kthread.c:388) 
[   51.027742] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.027936] ret_from_fork (arch/x86/kernel/process.c:147) 
[   51.028123] ? __pfx_kthread (kernel/kthread.c:341) 
[   51.028324] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.167715] ------------[ cut here ]------------
| [   59.168202] sysfs group 'bridge' not found for kobject 'br0'
| [   59.168794] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.169617] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.170925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.171943] Workqueue: netns cleanup_net
[   59.172330] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.172750] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   59.174339] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   59.174839] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   59.175501] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.175962] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   59.176405] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742706610
[   59.176950] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffff8eb742e45c50
[   59.177446] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   59.178021] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.178314] CR2: 00007f880b788000 CR3: 0000000036660003 CR4: 0000000000770ef0
[   59.178846] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.179460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.179919] PKRU: 55555554
[   59.180164] Call Trace:
[   59.180433]  <TASK>
[   59.180714] ? __warn (kernel/panic.c:677) 
[   59.181111] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.181602] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.182064] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.182452] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.182880] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.183395] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.183926] br_dev_delete (net/bridge/br_if.c:396) 
[   59.184323] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.184814] cleanup_net (net/core/net_namespace.c:630) 
[   59.185270] ? process_one_work (kernel/workqueue.c:2606) 
[   59.185756] process_one_work (kernel/workqueue.c:2633) 
[   59.186198] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.186663] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.187200] kthread (kernel/kthread.c:388) 
[   59.187575] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.187915] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.188305] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.188652] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.302694] ------------[ cut here ]------------
| [   59.303179] sysfs group 'bridge' not found for kobject 'br0'
| [   59.303733] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.304549] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.305362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.306146] Workqueue: netns cleanup_net
[   59.306350] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.306602] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   59.308054] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   59.308541] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   59.309082] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.309730] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   59.310195] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[   59.310788] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb7450c1750
[   59.311456] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   59.312295] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.312895] CR2: 00007f880b788000 CR3: 0000000036660003 CR4: 0000000000770ef0
[   59.313590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.314295] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.315034] PKRU: 55555554
[   59.315338] Call Trace:
[   59.315579]  <TASK>
[   59.315787] ? __warn (kernel/panic.c:677) 
[   59.316161] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.316583] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.316964] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.317360] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.317805] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.318209] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.318621] br_dev_delete (net/bridge/br_if.c:396) 
[   59.318973] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.319429] cleanup_net (net/core/net_namespace.c:630) 
[   59.319829] ? process_one_work (kernel/workqueue.c:2606) 
[   59.320257] process_one_work (kernel/workqueue.c:2633) 
[   59.320687] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.321030] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.321450] kthread (kernel/kthread.c:388) 
[   59.321783] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.322161] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.322576] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.322771] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.326228] ------------[ cut here ]------------
| [   59.326738] sysfs group 'bridge' not found for kobject 'br0'
| [   59.327351] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.328312] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.330014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.331243] Workqueue: netns cleanup_net
[   59.331633] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.332142] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   59.334084] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   59.334670] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   59.335419] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.336035] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   59.336703] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742704610
[   59.337368] R13: ffff9c494005be08 R14: ffff8eb742704b80 R15: ffff8eb7450c1750
[   59.338043] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   59.338759] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.339326] CR2: 00007f880b788000 CR3: 0000000036660003 CR4: 0000000000770ef0
[   59.339801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.340209] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.340737] PKRU: 55555554
[   59.340930] Call Trace:
[   59.341061]  <TASK>
[   59.341177] ? __warn (kernel/panic.c:677) 
[   59.341385] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.341753] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.342158] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.342601] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.342899] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.343386] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.343869] br_dev_delete (net/bridge/br_if.c:396) 
[   59.344323] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.344881] cleanup_net (net/core/net_namespace.c:630) 
[   59.345339] ? process_one_work (kernel/workqueue.c:2606) 
[   59.345866] process_one_work (kernel/workqueue.c:2633) 
[   59.346377] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.346826] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.347340] kthread (kernel/kthread.c:388) 
[   59.347728] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.348197] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.348646] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.349135] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   59.472753] ------------[ cut here ]------------
| [   59.473285] sysfs group 'bridge' not found for kobject 'br0'
| [   59.473946] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   59.474908] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   59.476506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   59.477537] Workqueue: netns cleanup_net
[   59.478000] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 59.478499] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   59.480242] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   59.480584] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   59.480989] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   59.481474] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   59.481849] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421be610
[   59.482208] R13: ffff9c494005be08 R14: ffff8eb7421beb80 R15: ffff8eb744629750
[   59.482593] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   59.483002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.483297] CR2: 00007f880b788000 CR3: 0000000036660003 CR4: 0000000000770ef0
[   59.483659] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   59.484019] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   59.484386] PKRU: 55555554
[   59.484536] Call Trace:
[   59.484673]  <TASK>
[   59.484787] ? __warn (kernel/panic.c:677) 
[   59.484961] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.485179] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   59.485382] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   59.485582] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   59.485791] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   59.486011] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   59.486232] br_dev_delete (net/bridge/br_if.c:396) 
[   59.486425] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   59.486668] cleanup_net (net/core/net_namespace.c:630) 
[   59.486868] ? process_one_work (kernel/workqueue.c:2606) 
[   59.487090] process_one_work (kernel/workqueue.c:2633) 
[   59.487307] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   59.487509] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   59.487743] kthread (kernel/kthread.c:388) 
[   59.487911] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.488112] ret_from_fork (arch/x86/kernel/process.c:147) 
[   59.488304] ? __pfx_kthread (kernel/kthread.c:341) 
[   59.488505] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.348791] ------------[ cut here ]------------
| [   67.349059] sysfs group 'bridge' not found for kobject 'br0'
| [   67.349375] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.349810] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.350575] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.351151] Workqueue: netns cleanup_net
[   67.351364] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.351640] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   67.352684] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   67.353000] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   67.353404] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.353824] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   67.354232] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475c610
[   67.354653] R13: ffff9c494005be08 R14: ffff8eb74475cb80 R15: ffff8eb7418c4550
[   67.355049] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   67.355504] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.355878] CR2: 00007fb7c46d7270 CR3: 0000000002dfa005 CR4: 0000000000770ef0
[   67.356304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.356707] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.357128] PKRU: 55555554
[   67.357320] Call Trace:
[   67.357493]  <TASK>
[   67.357648] ? __warn (kernel/panic.c:677) 
[   67.357872] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.358155] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.358403] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.358635] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.358891] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.359170] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.359440] br_dev_delete (net/bridge/br_if.c:396) 
[   67.359677] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.359954] cleanup_net (net/core/net_namespace.c:630) 
[   67.360196] ? process_one_work (kernel/workqueue.c:2606) 
[   67.360449] process_one_work (kernel/workqueue.c:2633) 
[   67.360697] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.360947] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.361230] kthread (kernel/kthread.c:388) 
[   67.361438] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.361668] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.361917] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.362175] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.459719] ------------[ cut here ]------------
| [   67.460112] sysfs group 'bridge' not found for kobject 'br0'
| [   67.460625] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.461314] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.462550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.463544] Workqueue: netns cleanup_net
[   67.463891] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.464303] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   67.465865] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   67.466313] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   67.466792] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.467205] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   67.467574] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec4610
[   67.467934] R13: ffff9c494005be08 R14: ffff8eb742ec4b80 R15: ffff8eb744629750
[   67.468362] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   67.468970] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.469385] CR2: 00007fb7c43d5000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   67.470010] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.470676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.471322] PKRU: 55555554
[   67.471590] Call Trace:
[   67.471838]  <TASK>
[   67.472065] ? __warn (kernel/panic.c:677) 
[   67.472376] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.472784] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.473132] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.473470] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.473862] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.474294] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.474701] br_dev_delete (net/bridge/br_if.c:396) 
[   67.475050] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.475409] cleanup_net (net/core/net_namespace.c:630) 
[   67.475725] ? process_one_work (kernel/workqueue.c:2606) 
[   67.476121] process_one_work (kernel/workqueue.c:2633) 
[   67.476483] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.476821] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.477171] kthread (kernel/kthread.c:388) 
[   67.477461] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.477792] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.478109] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.478316] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.481300] ------------[ cut here ]------------
| [   67.481665] sysfs group 'bridge' not found for kobject 'br0'
| [   67.482171] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.482876] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.484109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.485073] Workqueue: netns cleanup_net
[   67.485425] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.485860] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   67.487414] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   67.487867] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   67.488440] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.489014] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   67.489601] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec6610
[   67.490180] R13: ffff9c494005be08 R14: ffff8eb742ec6b80 R15: ffff8eb744629750
[   67.490738] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   67.491385] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.491685] CR2: 00007fb7c43d5000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   67.492105] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.492628] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.492989] PKRU: 55555554
[   67.493131] Call Trace:
[   67.493263]  <TASK>
[   67.493378] ? __warn (kernel/panic.c:677) 
[   67.493591] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.493927] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.494263] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.494614] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.494881] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.495236] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.495574] br_dev_delete (net/bridge/br_if.c:396) 
[   67.495765] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.496105] cleanup_net (net/core/net_namespace.c:630) 
[   67.496441] ? process_one_work (kernel/workqueue.c:2606) 
[   67.496869] process_one_work (kernel/workqueue.c:2633) 
[   67.497270] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.497651] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.498052] kthread (kernel/kthread.c:388) 
[   67.498373] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.498746] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.499086] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.499446] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   67.643743] ------------[ cut here ]------------
| [   67.644010] sysfs group 'bridge' not found for kobject 'br0'
| [   67.644339] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   67.644789] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   67.645562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   67.646137] Workqueue: netns cleanup_net
[   67.646344] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 67.646609] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   67.647550] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   67.647821] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   67.648191] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   67.648586] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   67.648946] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741936610
[   67.649317] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb742e44550
[   67.649705] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   67.650128] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.650436] CR2: 00007fc1cfc60000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   67.650824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.651206] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.651600] PKRU: 55555554
[   67.651750] Call Trace:
[   67.651885]  <TASK>
[   67.652010] ? __warn (kernel/panic.c:677) 
[   67.652192] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.652430] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   67.652651] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   67.652852] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   67.653077] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   67.653306] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   67.653558] br_dev_delete (net/bridge/br_if.c:396) 
[   67.653759] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   67.654026] cleanup_net (net/core/net_namespace.c:630) 
[   67.654233] ? process_one_work (kernel/workqueue.c:2606) 
[   67.654455] process_one_work (kernel/workqueue.c:2633) 
[   67.654690] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   67.654887] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   67.655119] kthread (kernel/kthread.c:388) 
[   67.655289] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.655492] ret_from_fork (arch/x86/kernel/process.c:147) 
[   67.655696] ? __pfx_kthread (kernel/kthread.c:341) 
[   67.655903] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.754736] ------------[ cut here ]------------
| [   75.755028] sysfs group 'bridge' not found for kobject 'br0'
| [   75.755556] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.756082] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.757363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.758494] Workqueue: netns cleanup_net
[   75.758886] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.759329] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   75.760991] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   75.761485] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   75.762078] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.762499] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   75.762871] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421bc610
[   75.763232] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb742e45c50
[   75.763669] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   75.764271] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.764628] CR2: 00007ff160a05000 CR3: 0000000036660005 CR4: 0000000000770ef0
[   75.765262] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.765968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.766649] PKRU: 55555554
[   75.766909] Call Trace:
[   75.767169]  <TASK>
[   75.767381] ? __warn (kernel/panic.c:677) 
[   75.767723] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.768141] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.768512] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.768881] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.769252] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.769655] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.770016] br_dev_delete (net/bridge/br_if.c:396) 
[   75.770394] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.770803] cleanup_net (net/core/net_namespace.c:630) 
[   75.771139] ? process_one_work (kernel/workqueue.c:2606) 
[   75.771517] process_one_work (kernel/workqueue.c:2633) 
[   75.771859] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.772212] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.772593] kthread (kernel/kthread.c:388) 
[   75.772861] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.773056] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.773272] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.773518] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.887697] ------------[ cut here ]------------
| [   75.887940] sysfs group 'bridge' not found for kobject 'br0'
| [   75.888247] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.888672] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.889405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.889981] Workqueue: netns cleanup_net
[   75.890190] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.890436] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   75.891357] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   75.891631] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   75.891989] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.892346] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   75.892721] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741d46610
[   75.893080] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffffffffb5278f90
[   75.893439] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   75.893850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.894143] CR2: 00007ff160a05000 CR3: 0000000036660005 CR4: 0000000000770ef0
[   75.894503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.894867] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.895223] PKRU: 55555554
[   75.895368] Call Trace:
[   75.895500]  <TASK>
[   75.895623] ? __warn (kernel/panic.c:677) 
[   75.895796] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.896012] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.896206] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.896390] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.896596] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.896820] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.897035] br_dev_delete (net/bridge/br_if.c:396) 
[   75.897226] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.897456] cleanup_net (net/core/net_namespace.c:630) 
[   75.897652] ? process_one_work (kernel/workqueue.c:2606) 
[   75.897868] process_one_work (kernel/workqueue.c:2633) 
[   75.898082] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.898278] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.898499] kthread (kernel/kthread.c:388) 
[   75.898673] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.898870] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.899059] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.899255] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.901743] ------------[ cut here ]------------
| [   75.901981] sysfs group 'bridge' not found for kobject 'br0'
| [   75.902277] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.902697] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.903427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.904000] Workqueue: netns cleanup_net
[   75.904204] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.904449] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   75.905374] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   75.905645] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   75.906004] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.906362] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   75.906725] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f0610
[   75.907083] R13: ffff9c494005be08 R14: ffff8eb7421f0b80 R15: ffffffffb5278f90
[   75.907442] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   75.907852] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.908142] CR2: 00007ff160a05000 CR3: 0000000036660005 CR4: 0000000000770ef0
[   75.908501] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.908863] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.909221] PKRU: 55555554
[   75.909363] Call Trace:
[   75.909494]  <TASK>
[   75.909615] ? __warn (kernel/panic.c:677) 
[   75.909786] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.910002] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.910195] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.910377] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.910583] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.910802] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.911023] br_dev_delete (net/bridge/br_if.c:396) 
[   75.911211] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.911436] cleanup_net (net/core/net_namespace.c:630) 
[   75.911633] ? process_one_work (kernel/workqueue.c:2606) 
[   75.911851] process_one_work (kernel/workqueue.c:2633) 
[   75.912061] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.912257] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.912487] kthread (kernel/kthread.c:388) 
[   75.912658] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.912855] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.913042] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.913236] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   75.915740] ------------[ cut here ]------------
| [   75.915977] sysfs group 'bridge' not found for kobject 'br0'
| [   75.916271] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   75.916680] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   75.917409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   75.917981] Workqueue: netns cleanup_net
[   75.918183] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 75.918428] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   75.919352] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   75.919621] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   75.919983] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   75.920340] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   75.920703] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec2610
[   75.921060] R13: ffff9c494005be08 R14: ffff8eb742ec2b80 R15: ffffffffb5278f90
[   75.921418] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   75.921828] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.922119] CR2: 00007ff160a05000 CR3: 0000000036660005 CR4: 0000000000770ef0
[   75.922490] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.922856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.923215] PKRU: 55555554
[   75.923357] Call Trace:
[   75.923487]  <TASK>
[   75.923607] ? __warn (kernel/panic.c:677) 
[   75.923779] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.924001] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   75.924194] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   75.924377] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   75.924586] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   75.924805] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   75.925023] br_dev_delete (net/bridge/br_if.c:396) 
[   75.925212] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   75.925437] cleanup_net (net/core/net_namespace.c:630) 
[   75.925634] ? process_one_work (kernel/workqueue.c:2606) 
[   75.925851] process_one_work (kernel/workqueue.c:2633) 
[   75.926061] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   75.926257] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   75.926481] kthread (kernel/kthread.c:388) 
[   75.926654] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.926851] ret_from_fork (arch/x86/kernel/process.c:147) 
[   75.927038] ? __pfx_kthread (kernel/kthread.c:341) 
[   75.927233] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   83.880708] ------------[ cut here ]------------
| [   83.881111] sysfs group 'bridge' not found for kobject 'br0'
| [   83.881553] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   83.882191] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   83.883059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   83.883785] Workqueue: netns cleanup_net
[   83.884149] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 83.884404] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   83.885559] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   83.885891] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   83.886341] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   83.886879] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   83.887468] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742700610
[   83.888069] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffff8eb7418c2e50
[   83.888669] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   83.889338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.889833] CR2: 000055a96c4be3a0 CR3: 0000000036660006 CR4: 0000000000770ef0
[   83.890411] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.891029] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.891667] PKRU: 55555554
[   83.891891] Call Trace:
[   83.892120]  <TASK>
[   83.892342] ? __warn (kernel/panic.c:677) 
[   83.892637] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.893000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   83.893326] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   83.893596] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   83.893926] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   83.894249] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   83.894623] br_dev_delete (net/bridge/br_if.c:396) 
[   83.894918] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   83.895295] cleanup_net (net/core/net_namespace.c:630) 
[   83.895572] ? process_one_work (kernel/workqueue.c:2606) 
[   83.895913] process_one_work (kernel/workqueue.c:2633) 
[   83.896201] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   83.896512] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   83.896860] kthread (kernel/kthread.c:388) 
[   83.897160] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.897364] ret_from_fork (arch/x86/kernel/process.c:147) 
[   83.897586] ? __pfx_kthread (kernel/kthread.c:341) 
[   83.897809] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   84.005819] ------------[ cut here ]------------
| [   84.006379] sysfs group 'bridge' not found for kobject 'br0'
| [   84.007086] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   84.007833] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   84.009178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   84.010506] Workqueue: netns cleanup_net
[   84.010936] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 84.011535] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   84.013768] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   84.014494] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   84.015477] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   84.016483] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   84.017485] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec0610
[   84.018479] R13: ffff9c494005be08 R14: ffff8eb742ec0b80 R15: ffff8eb742e42e50
[   84.019114] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   84.019770] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.020290] CR2: 000055a96c4be3a0 CR3: 0000000036660006 CR4: 0000000000770ef0
[   84.021064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   84.021840] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   84.022727] PKRU: 55555554
[   84.023099] Call Trace:
[   84.023456]  <TASK>
[   84.023763] ? __warn (kernel/panic.c:677) 
[   84.024216] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.024757] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   84.025220] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   84.025701] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   84.026194] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   84.026759] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.027360] br_dev_delete (net/bridge/br_if.c:396) 
[   84.027860] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   84.028469] cleanup_net (net/core/net_namespace.c:630) 
[   84.028929] ? process_one_work (kernel/workqueue.c:2606) 
[   84.029471] process_one_work (kernel/workqueue.c:2633) 
[   84.030001] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   84.030465] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   84.031034] kthread (kernel/kthread.c:388) 
[   84.031431] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.031915] ret_from_fork (arch/x86/kernel/process.c:147) 
[   84.032328] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.032647] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   84.038209] ------------[ cut here ]------------
| [   84.038865] sysfs group 'bridge' not found for kobject 'br0'
| [   84.039666] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   84.040756] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   84.042644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   84.044066] Workqueue: netns cleanup_net
[   84.044572] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 84.045028] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   84.046537] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   84.046951] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   84.047507] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   84.048068] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   84.048629] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744630610
[   84.049183] R13: ffff9c494005be08 R14: ffff8eb744630b80 R15: ffff8eb742e42e50
[   84.049746] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   84.050372] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.050831] CR2: 000055a96c4be3a0 CR3: 0000000036660006 CR4: 0000000000770ef0
[   84.051388] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   84.051948] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   84.052512] PKRU: 55555554
[   84.052740] Call Trace:
[   84.052945]  <TASK>
[   84.053122] ? __warn (kernel/panic.c:677) 
[   84.053388] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.053733] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   84.054033] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   84.054318] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   84.054634] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   84.054976] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.055313] br_dev_delete (net/bridge/br_if.c:396) 
[   84.055614] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   84.055969] cleanup_net (net/core/net_namespace.c:630) 
[   84.056265] ? process_one_work (kernel/workqueue.c:2606) 
[   84.056606] process_one_work (kernel/workqueue.c:2633) 
[   84.056932] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   84.057236] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   84.057587] kthread (kernel/kthread.c:388) 
[   84.057846] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.058149] ret_from_fork (arch/x86/kernel/process.c:147) 
[   84.058439] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.058746] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   84.198843] ------------[ cut here ]------------
| [   84.199385] sysfs group 'bridge' not found for kobject 'br0'
| [   84.200094] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   84.201063] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   84.202704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   84.203686] Workqueue: netns cleanup_net
[   84.204008] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 84.204394] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   84.205831] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   84.206247] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   84.206810] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   84.207362] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   84.207923] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c88610
[   84.208481] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffff8eb7450c2e50
[   84.209048] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[   84.209685] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.210135] CR2: 000055a96c4be3a0 CR3: 0000000036660006 CR4: 0000000000770ef0
[   84.210700] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   84.211255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   84.211825] PKRU: 55555554
[   84.212046] Call Trace:
[   84.212250]  <TASK>
[   84.212439] ? __warn (kernel/panic.c:677) 
[   84.212719] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.213057] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   84.213365] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   84.213660] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   84.213970] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   84.214310] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   84.214659] br_dev_delete (net/bridge/br_if.c:396) 
[   84.214953] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   84.215305] cleanup_net (net/core/net_namespace.c:630) 
[   84.215611] ? process_one_work (kernel/workqueue.c:2606) 
[   84.215945] process_one_work (kernel/workqueue.c:2633) 
[   84.216272] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   84.216590] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   84.216933] kthread (kernel/kthread.c:388) 
[   84.217192] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.217495] ret_from_fork (arch/x86/kernel/process.c:147) 
[   84.217796] ? __pfx_kthread (kernel/kthread.c:341) 
[   84.218098] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.468791] ------------[ cut here ]------------
| [   92.469085] sysfs group 'bridge' not found for kobject 'br0'
| [   92.469446] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.469901] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.470714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.471352] Workqueue: netns cleanup_net
[   92.471608] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.471896] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   92.472873] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   92.473181] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   92.473602] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.473989] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   92.474387] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[   92.474814] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb7418c2e50
[   92.475223] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   92.475657] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.475990] CR2: 00007f0c11472000 CR3: 0000000036660006 CR4: 0000000000770ef0
[   92.476384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.476819] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.477212] PKRU: 55555554
[   92.477383] Call Trace:
[   92.477578]  <TASK>
[   92.477710] ? __warn (kernel/panic.c:677) 
[   92.477920] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.478199] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.478436] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.478654] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.478900] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.479160] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.479438] br_dev_delete (net/bridge/br_if.c:396) 
[   92.479677] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.479942] cleanup_net (net/core/net_namespace.c:630) 
[   92.480191] ? process_one_work (kernel/workqueue.c:2606) 
[   92.480410] process_one_work (kernel/workqueue.c:2633) 
[   92.480654] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.480860] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.481102] kthread (kernel/kthread.c:388) 
[   92.481313] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.481549] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.481789] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.482030] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.560753] ------------[ cut here ]------------
| [   92.561026] sysfs group 'bridge' not found for kobject 'br0'
| [   92.561392] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.561836] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.562648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.563259] Workqueue: netns cleanup_net
[   92.563505] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.563780] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   92.564748] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   92.565062] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   92.565460] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.565858] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   92.566271] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741932610
[   92.566681] R13: ffff9c494005be08 R14: ffff8eb741932b80 R15: ffff8eb74462c550
[   92.567100] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[   92.567524] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.567858] CR2: 00007f0c11472000 CR3: 0000000036660006 CR4: 0000000000770ef0
[   92.568281] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.568698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.569097] PKRU: 55555554
[   92.569292] Call Trace:
[   92.569482]  <TASK>
[   92.569639] ? __warn (kernel/panic.c:677) 
[   92.569843] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.570098] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.570340] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.570563] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.570785] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.571047] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.571308] br_dev_delete (net/bridge/br_if.c:396) 
[   92.571550] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.571799] cleanup_net (net/core/net_namespace.c:630) 
[   92.572026] ? process_one_work (kernel/workqueue.c:2606) 
[   92.572298] process_one_work (kernel/workqueue.c:2633) 
[   92.572562] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.572790] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.573053] kthread (kernel/kthread.c:388) 
[   92.573282] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.573533] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.573758] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.573994] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.710846] ------------[ cut here ]------------
| [   92.711239] sysfs group 'bridge' not found for kobject 'br0'
| [   92.711741] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.712379] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.713556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.714438] Workqueue: netns cleanup_net
[   92.714774] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.715158] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   92.716584] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   92.716999] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   92.717560] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.718116] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   92.718680] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742702610
[   92.719231] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffffffffb5278f90
[   92.719794] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   92.720422] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.720889] CR2: 00007fb60554a000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   92.721443] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.722010] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.722582] PKRU: 55555554
[   92.722804] Call Trace:
[   92.723004]  <TASK>
[   92.723181] ? __warn (kernel/panic.c:677) 
[   92.723443] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.723780] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.724079] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.724353] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.724672] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.725022] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.725353] br_dev_delete (net/bridge/br_if.c:396) 
[   92.725646] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.725990] cleanup_net (net/core/net_namespace.c:630) 
[   92.726280] ? process_one_work (kernel/workqueue.c:2606) 
[   92.726621] process_one_work (kernel/workqueue.c:2633) 
[   92.726942] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.727246] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.727597] kthread (kernel/kthread.c:388) 
[   92.727860] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.728166] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.728456] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.728762] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   92.732660] ------------[ cut here ]------------
| [   92.733024] sysfs group 'bridge' not found for kobject 'br0'
| [   92.733479] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   92.734122] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   92.735286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   92.736171] Workqueue: netns cleanup_net
[   92.736480] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 92.736872] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[   92.738289] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[   92.738599] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[   92.738958] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   92.739315] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[   92.739692] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744636610
[   92.740049] R13: ffff9c494005be08 R14: ffff8eb744636b80 R15: ffffffffb5278f90
[   92.740405] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[   92.740827] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.741119] CR2: 00007fb60554a000 CR3: 0000000036660002 CR4: 0000000000770ef0
[   92.741479] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.741879] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.742237] PKRU: 55555554
[   92.742391] Call Trace:
[   92.742541]  <TASK>
[   92.742658] ? __warn (kernel/panic.c:677) 
[   92.742827] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.743044] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   92.743237] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   92.743420] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   92.743640] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   92.743860] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   92.744079] br_dev_delete (net/bridge/br_if.c:396) 
[   92.744268] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   92.744504] cleanup_net (net/core/net_namespace.c:630) 
[   92.744704] ? process_one_work (kernel/workqueue.c:2606) 
[   92.744919] process_one_work (kernel/workqueue.c:2633) 
[   92.745129] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   92.745325] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   92.745595] kthread (kernel/kthread.c:388) 
[   92.745850] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.746149] ret_from_fork (arch/x86/kernel/process.c:147) 
[   92.746436] ? __pfx_kthread (kernel/kthread.c:341) 
[   92.746716] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  101.183864] ------------[ cut here ]------------
| [  101.184564] sysfs group 'bridge' not found for kobject 'br0'
| [  101.185341] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  101.186355] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  101.188184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  101.189517] Workqueue: netns cleanup_net
[  101.190007] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 101.190392] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  101.191859] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  101.192269] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  101.192840] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  101.193381] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  101.193894] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741932610
[  101.194414] R13: ffff9c494005be08 R14: ffff8eb741932b80 R15: ffff8eb744629750
[  101.194952] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  101.195574] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  101.196021] CR2: 00007ffedef90858 CR3: 0000000036660001 CR4: 0000000000770ef0
[  101.196584] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  101.197136] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  101.197695] PKRU: 55555554
[  101.197916] Call Trace:
[  101.198112]  <TASK>
[  101.198284] ? __warn (kernel/panic.c:677) 
[  101.198555] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.198884] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  101.199174] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  101.199451] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  101.199763] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  101.200098] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.200430] br_dev_delete (net/bridge/br_if.c:396) 
[  101.200727] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  101.201076] cleanup_net (net/core/net_namespace.c:630) 
[  101.201368] ? process_one_work (kernel/workqueue.c:2606) 
[  101.201705] process_one_work (kernel/workqueue.c:2633) 
[  101.202028] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  101.202334] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  101.202683] kthread (kernel/kthread.c:388) 
[  101.202940] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.203239] ret_from_fork (arch/x86/kernel/process.c:147) 
[  101.203540] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.203840] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  101.321870] ------------[ cut here ]------------
| [  101.322306] sysfs group 'bridge' not found for kobject 'br0'
| [  101.323071] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  101.323997] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  101.325538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  101.326983] Workqueue: netns cleanup_net
[  101.327537] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 101.328152] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  101.330601] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  101.331254] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  101.332124] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  101.332746] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  101.333187] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744632610
[  101.333630] R13: ffff9c494005be08 R14: ffff8eb744632b80 R15: ffff8eb742e41750
[  101.333988] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  101.334391] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  101.334829] CR2: 00007ffedef90858 CR3: 0000000036660001 CR4: 0000000000770ef0
[  101.335420] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  101.336208] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  101.337151] PKRU: 55555554
[  101.337516] Call Trace:
[  101.337841]  <TASK>
[  101.338134] ? __warn (kernel/panic.c:677) 
[  101.338581] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.339181] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  101.339734] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  101.340226] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  101.340740] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  101.341157] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.341546] br_dev_delete (net/bridge/br_if.c:396) 
[  101.341901] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  101.342255] cleanup_net (net/core/net_namespace.c:630) 
[  101.342565] ? process_one_work (kernel/workqueue.c:2606) 
[  101.342905] process_one_work (kernel/workqueue.c:2633) 
[  101.343274] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  101.343586] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  101.344013] kthread (kernel/kthread.c:388) 
[  101.344274] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.344626] ret_from_fork (arch/x86/kernel/process.c:147) 
[  101.344905] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.345214] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  101.348368] ------------[ cut here ]------------
| [  101.348718] sysfs group 'bridge' not found for kobject 'br0'
| [  101.349117] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  101.349714] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  101.351225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  101.352456] Workqueue: netns cleanup_net
[  101.352882] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 101.353377] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  101.355304] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  101.355866] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  101.356593] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  101.357322] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  101.357947] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744634610
[  101.358617] R13: ffff9c494005be08 R14: ffff8eb744634b80 R15: ffff8eb742e41750
[  101.359370] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  101.360167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  101.360735] CR2: 000055a96c64d028 CR3: 0000000036660003 CR4: 0000000000770ef0
[  101.361369] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  101.361781] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  101.362187] PKRU: 55555554
[  101.362431] Call Trace:
[  101.362600]  <TASK>
[  101.362718] ? __warn (kernel/panic.c:677) 
[  101.362891] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.363107] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  101.363302] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  101.363488] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  101.363696] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  101.363920] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.364137] br_dev_delete (net/bridge/br_if.c:396) 
[  101.364328] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  101.364565] cleanup_net (net/core/net_namespace.c:630) 
[  101.364755] ? process_one_work (kernel/workqueue.c:2606) 
[  101.364971] process_one_work (kernel/workqueue.c:2633) 
[  101.365184] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  101.365380] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  101.365609] kthread (kernel/kthread.c:388) 
[  101.365777] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.365972] ret_from_fork (arch/x86/kernel/process.c:147) 
[  101.366163] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.366357] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  101.478736] ------------[ cut here ]------------
| [  101.479206] sysfs group 'bridge' not found for kobject 'br0'
| [  101.479815] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  101.480616] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  101.482042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  101.483143] Workqueue: netns cleanup_net
[  101.483478] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 101.483971] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  101.485600] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  101.485985] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  101.486375] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  101.486846] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  101.487364] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[  101.487805] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb742e40050
[  101.488202] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  101.488923] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  101.489352] CR2: 000055a96c64d028 CR3: 0000000036660003 CR4: 0000000000770ef0
[  101.489877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  101.490518] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  101.491193] PKRU: 55555554
[  101.491469] Call Trace:
[  101.491746]  <TASK>
[  101.491989] ? __warn (kernel/panic.c:677) 
[  101.492336] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.492721] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  101.493098] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  101.493471] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  101.493875] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  101.494309] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  101.494741] br_dev_delete (net/bridge/br_if.c:396) 
[  101.495072] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  101.495537] cleanup_net (net/core/net_namespace.c:630) 
[  101.495894] ? process_one_work (kernel/workqueue.c:2606) 
[  101.496325] process_one_work (kernel/workqueue.c:2633) 
[  101.496707] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  101.497108] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  101.497566] kthread (kernel/kthread.c:388) 
[  101.497915] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.498282] ret_from_fork (arch/x86/kernel/process.c:147) 
[  101.498646] ? __pfx_kthread (kernel/kthread.c:341) 
[  101.498943] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  109.017824] ------------[ cut here ]------------
| [  109.018310] sysfs group 'bridge' not found for kobject 'br0'
| [  109.018878] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  109.019639] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  109.021011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  109.022021] Workqueue: netns cleanup_net
[  109.022359] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 109.022759] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  109.024354] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  109.024768] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  109.025371] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  109.025788] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  109.026203] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca4610
[  109.026618] R13: ffff9c494005be08 R14: ffff8eb744ca4b80 R15: ffff8eb7450c2e50
[  109.026985] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  109.027420] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  109.027733] CR2: 00007fc79d92a000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  109.028111] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  109.028490] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  109.028871] PKRU: 55555554
[  109.029022] Call Trace:
[  109.029155]  <TASK>
[  109.029285] ? __warn (kernel/panic.c:677) 
[  109.029489] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.029730] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  109.029935] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  109.030130] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  109.030327] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  109.030562] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.030777] br_dev_delete (net/bridge/br_if.c:396) 
[  109.030968] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  109.031197] cleanup_net (net/core/net_namespace.c:630) 
[  109.031387] ? process_one_work (kernel/workqueue.c:2606) 
[  109.031613] process_one_work (kernel/workqueue.c:2633) 
[  109.031824] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  109.032019] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  109.032239] kthread (kernel/kthread.c:388) 
[  109.032415] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.032622] ret_from_fork (arch/x86/kernel/process.c:147) 
[  109.032813] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.033008] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  109.131729] ------------[ cut here ]------------
| [  109.132197] sysfs group 'bridge' not found for kobject 'br0'
| [  109.132747] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  109.133490] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  109.134801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  109.135818] Workqueue: netns cleanup_net
[  109.136182] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 109.136582] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  109.138115] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  109.138536] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  109.139137] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  109.139641] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  109.140030] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca2610
[  109.140501] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb742e40050
[  109.140995] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  109.141413] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  109.141809] CR2: 00007fc79d92a000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  109.142508] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  109.143108] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  109.143740] PKRU: 55555554
[  109.144059] Call Trace:
[  109.144221]  <TASK>
[  109.144337] ? __warn (kernel/panic.c:677) 
[  109.144558] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.144923] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  109.145310] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  109.145680] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  109.146104] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  109.146553] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.146982] br_dev_delete (net/bridge/br_if.c:396) 
[  109.147378] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  109.147862] cleanup_net (net/core/net_namespace.c:630) 
[  109.148252] ? process_one_work (kernel/workqueue.c:2606) 
[  109.148709] process_one_work (kernel/workqueue.c:2633) 
[  109.149149] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  109.149557] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  109.150002] kthread (kernel/kthread.c:388) 
[  109.150343] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.150771] ret_from_fork (arch/x86/kernel/process.c:147) 
[  109.151126] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.151504] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  109.154862] ------------[ cut here ]------------
| [  109.155276] sysfs group 'bridge' not found for kobject 'br0'
| [  109.155866] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  109.156745] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  109.158269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  109.159451] Workqueue: netns cleanup_net
[  109.159868] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 109.160400] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  109.162243] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  109.162711] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  109.163365] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  109.164091] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  109.164783] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744758610
[  109.165410] R13: ffff9c494005be08 R14: ffff8eb744758b80 R15: ffff8eb742e40050
[  109.166062] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  109.166559] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  109.166898] CR2: 00007fc79d92a000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  109.167317] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  109.167855] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  109.168213] PKRU: 55555554
[  109.168399] Call Trace:
[  109.168604]  <TASK>
[  109.168811] ? __warn (kernel/panic.c:677) 
[  109.169141] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.169384] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  109.169673] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  109.169970] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  109.170353] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  109.170807] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.171236] br_dev_delete (net/bridge/br_if.c:396) 
[  109.171625] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  109.172107] cleanup_net (net/core/net_namespace.c:630) 
[  109.172508] ? process_one_work (kernel/workqueue.c:2606) 
[  109.172935] process_one_work (kernel/workqueue.c:2633) 
[  109.173341] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  109.173738] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  109.174175] kthread (kernel/kthread.c:388) 
[  109.174515] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.174882] ret_from_fork (arch/x86/kernel/process.c:147) 
[  109.175254] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.175650] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  109.275715] ------------[ cut here ]------------
| [  109.276172] sysfs group 'bridge' not found for kobject 'br0'
| [  109.276712] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  109.277407] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  109.278215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  109.278796] Workqueue: netns cleanup_net
[  109.279099] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 109.279513] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  109.280858] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  109.281344] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  109.281997] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  109.282652] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  109.283300] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca0610
[  109.283958] R13: ffff9c494005be08 R14: ffff8eb744ca0b80 R15: ffff8eb744629750
[  109.284623] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  109.285361] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  109.285877] CR2: 00007fc79d92a000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  109.286585] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  109.287214] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  109.287840] PKRU: 55555554
[  109.288080] Call Trace:
[  109.288308]  <TASK>
[  109.288502] ? __warn (kernel/panic.c:677) 
[  109.288787] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.289139] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  109.289474] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  109.289707] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  109.289907] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  109.290147] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  109.290422] br_dev_delete (net/bridge/br_if.c:396) 
[  109.290638] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  109.291014] cleanup_net (net/core/net_namespace.c:630) 
[  109.291205] ? process_one_work (kernel/workqueue.c:2606) 
[  109.291426] process_one_work (kernel/workqueue.c:2633) 
[  109.291704] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  109.292015] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  109.292320] kthread (kernel/kthread.c:388) 
[  109.292503] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.292780] ret_from_fork (arch/x86/kernel/process.c:147) 
[  109.293063] ? __pfx_kthread (kernel/kthread.c:341) 
[  109.293413] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  116.663733] ------------[ cut here ]------------
| [  116.664272] sysfs group 'bridge' not found for kobject 'br0'
| [  116.664964] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  116.665775] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  116.667310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  116.668440] Workqueue: netns cleanup_net
[  116.668842] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 116.669370] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  116.670607] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  116.670991] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  116.671492] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  116.671854] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  116.672541] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744632610
[  116.673078] R13: ffff9c494005be08 R14: ffff8eb744632b80 R15: ffff8eb742e40050
[  116.673657] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  116.674412] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  116.675052] CR2: 00007fda67546270 CR3: 0000000036660006 CR4: 0000000000770ef0
[  116.675764] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  116.676496] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  116.677240] PKRU: 55555554
[  116.677495] Call Trace:
[  116.677765]  <TASK>
[  116.678017] ? __warn (kernel/panic.c:677) 
[  116.678359] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.678780] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  116.679200] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  116.679537] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  116.679931] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  116.680394] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.680838] br_dev_delete (net/bridge/br_if.c:396) 
[  116.681207] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  116.681690] cleanup_net (net/core/net_namespace.c:630) 
[  116.682062] ? process_one_work (kernel/workqueue.c:2606) 
[  116.682418] process_one_work (kernel/workqueue.c:2633) 
[  116.682833] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  116.683194] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  116.683669] kthread (kernel/kthread.c:388) 
[  116.683966] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.684367] ret_from_fork (arch/x86/kernel/process.c:147) 
[  116.684748] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.685122] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  116.779721] ------------[ cut here ]------------
| [  116.780021] sysfs group 'bridge' not found for kobject 'br0'
| [  116.780406] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  116.781045] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  116.781893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  116.782816] Workqueue: netns cleanup_net
[  116.783173] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 116.783663] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  116.785723] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  116.786336] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  116.787130] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  116.787959] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  116.788749] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744758610
[  116.789535] R13: ffff9c494005be08 R14: ffff8eb744758b80 R15: ffff8eb744629750
[  116.790318] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  116.791150] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  116.791705] CR2: 00007fda67546270 CR3: 0000000036660006 CR4: 0000000000770ef0
[  116.792415] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  116.793123] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  116.793838] PKRU: 55555554
[  116.794063] Call Trace:
[  116.794326]  <TASK>
[  116.794569] ? __warn (kernel/panic.c:677) 
[  116.794886] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.795282] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  116.795484] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  116.795705] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  116.795920] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  116.796185] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.796645] br_dev_delete (net/bridge/br_if.c:396) 
[  116.796837] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  116.797066] cleanup_net (net/core/net_namespace.c:630) 
[  116.797258] ? process_one_work (kernel/workqueue.c:2606) 
[  116.797572] process_one_work (kernel/workqueue.c:2633) 
[  116.797953] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  116.798284] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  116.798708] kthread (kernel/kthread.c:388) 
[  116.799013] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.799236] ret_from_fork (arch/x86/kernel/process.c:147) 
[  116.799596] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.799893] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  116.804411] ------------[ cut here ]------------
| [  116.804843] sysfs group 'bridge' not found for kobject 'br0'
| [  116.805370] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  116.806117] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  116.807494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  116.808612] Workqueue: netns cleanup_net
[  116.808990] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 116.809472] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  116.811023] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  116.811314] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  116.811753] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  116.812109] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  116.812588] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742706610
[  116.813260] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffff8eb744629750
[  116.813663] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  116.814357] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  116.814943] CR2: 00007fda67546270 CR3: 0000000036660006 CR4: 0000000000770ef0
[  116.815590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  116.816323] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  116.817026] PKRU: 55555554
[  116.817298] Call Trace:
[  116.817591]  <TASK>
[  116.817851] ? __warn (kernel/panic.c:677) 
[  116.818240] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.818645] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  116.819045] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  116.819399] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  116.819830] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  116.820230] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.820716] br_dev_delete (net/bridge/br_if.c:396) 
[  116.821118] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  116.821623] cleanup_net (net/core/net_namespace.c:630) 
[  116.822025] ? process_one_work (kernel/workqueue.c:2606) 
[  116.822443] process_one_work (kernel/workqueue.c:2633) 
[  116.822768] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  116.823158] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  116.823553] kthread (kernel/kthread.c:388) 
[  116.823875] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.824230] ret_from_fork (arch/x86/kernel/process.c:147) 
[  116.824637] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.824976] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  116.960840] ------------[ cut here ]------------
| [  116.961276] sysfs group 'bridge' not found for kobject 'br0'
| [  116.961820] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  116.962543] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  116.963817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  116.964816] Workqueue: netns cleanup_net
[  116.965171] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 116.965601] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  116.967198] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  116.967672] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  116.968302] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  116.968926] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  116.969560] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742702610
[  116.970185] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffff8eb744628050
[  116.970820] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  116.971564] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  116.972075] CR2: 00007fda67546270 CR3: 0000000036660006 CR4: 0000000000770ef0
[  116.972718] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  116.973340] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  116.973974] PKRU: 55555554
[  116.974227] Call Trace:
[  116.974457]  <TASK>
[  116.974668] ? __warn (kernel/panic.c:677) 
[  116.974961] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.975199] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  116.975539] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  116.975860] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  116.976181] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  116.976568] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  116.976936] br_dev_delete (net/bridge/br_if.c:396) 
[  116.977265] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  116.977679] cleanup_net (net/core/net_namespace.c:630) 
[  116.978012] ? process_one_work (kernel/workqueue.c:2606) 
[  116.978385] process_one_work (kernel/workqueue.c:2633) 
[  116.978767] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  116.979108] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  116.979493] kthread (kernel/kthread.c:388) 
[  116.979793] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.980136] ret_from_fork (arch/x86/kernel/process.c:147) 
[  116.980464] ? __pfx_kthread (kernel/kthread.c:341) 
[  116.980818] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.369819] ------------[ cut here ]------------
| [  124.370594] sysfs group 'bridge' not found for kobject 'br0'
| [  124.371387] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.372766] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.374816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.376231] Workqueue: netns cleanup_net
[  124.376623] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.377133] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  124.378835] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  124.379221] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  124.379899] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  124.380351] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  124.381064] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec2610
[  124.381960] R13: ffff9c494005be08 R14: ffff8eb742ec2b80 R15: ffff8eb7418c1750
[  124.382782] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  124.383607] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.384238] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  124.385039] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.385812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.386599] PKRU: 55555554
[  124.386952] Call Trace:
[  124.387282]  <TASK>
[  124.387536] ? __warn (kernel/panic.c:677) 
[  124.387897] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.388341] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  124.388760] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  124.389106] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  124.389613] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  124.390093] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.390513] br_dev_delete (net/bridge/br_if.c:396) 
[  124.390907] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  124.391377] cleanup_net (net/core/net_namespace.c:630) 
[  124.391827] ? process_one_work (kernel/workqueue.c:2606) 
[  124.392304] process_one_work (kernel/workqueue.c:2633) 
[  124.392731] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  124.393164] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  124.393640] kthread (kernel/kthread.c:388) 
[  124.393811] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.394053] ret_from_fork (arch/x86/kernel/process.c:147) 
[  124.394283] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.394491] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.529729] ------------[ cut here ]------------
| [  124.530181] sysfs group 'bridge' not found for kobject 'br0'
| [  124.530523] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.531498] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.533268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.534950] Workqueue: netns cleanup_net
[  124.535569] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.536290] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  124.539042] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  124.539884] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  124.540927] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  124.541902] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  124.542931] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d2610
[  124.543858] R13: ffff9c494005be08 R14: ffff8eb7445d2b80 R15: ffffffffb5278f90
[  124.544903] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  124.545744] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.546351] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  124.546945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.547448] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.547960] PKRU: 55555554
[  124.548161] Call Trace:
[  124.548345]  <TASK>
[  124.548507] ? __warn (kernel/panic.c:677) 
[  124.548755] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.549060] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  124.549331] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  124.549611] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  124.549857] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  124.550088] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.550312] br_dev_delete (net/bridge/br_if.c:396) 
[  124.550508] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  124.550756] cleanup_net (net/core/net_namespace.c:630) 
[  124.550954] ? process_one_work (kernel/workqueue.c:2606) 
[  124.551173] process_one_work (kernel/workqueue.c:2633) 
[  124.551388] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  124.551605] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  124.551831] kthread (kernel/kthread.c:388) 
[  124.552003] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.552201] ret_from_fork (arch/x86/kernel/process.c:147) 
[  124.552406] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.552618] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.555158] ------------[ cut here ]------------
| [  124.555416] sysfs group 'bridge' not found for kobject 'br0'
| [  124.555787] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.556199] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.556950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.557546] Workqueue: netns cleanup_net
[  124.557754] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.558003] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  124.558937] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  124.559207] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  124.559580] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  124.559936] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  124.560296] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d4610
[  124.560663] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffffffffb5278f90
[  124.561023] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  124.561464] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.561770] CR2: 000055a96ba3cdec CR3: 000000000444c004 CR4: 0000000000770ef0
[  124.562132] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.562498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.562861] PKRU: 55555554
[  124.563005] Call Trace:
[  124.563136]  <TASK>
[  124.563253] ? __warn (kernel/panic.c:677) 
[  124.563426] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.563650] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  124.563844] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  124.564027] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  124.564228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  124.564449] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.564672] br_dev_delete (net/bridge/br_if.c:396) 
[  124.564864] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  124.565092] cleanup_net (net/core/net_namespace.c:630) 
[  124.565282] ? process_one_work (kernel/workqueue.c:2606) 
[  124.565500] process_one_work (kernel/workqueue.c:2633) 
[  124.565716] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  124.565913] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  124.566135] kthread (kernel/kthread.c:388) 
[  124.566300] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.566497] ret_from_fork (arch/x86/kernel/process.c:147) 
[  124.566693] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.566889] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  124.569417] ------------[ cut here ]------------
| [  124.569683] sysfs group 'bridge' not found for kobject 'br0'
| [  124.569985] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  124.570395] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  124.571136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  124.571708] Workqueue: netns cleanup_net
[  124.571912] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 124.572158] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  124.573092] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  124.573358] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  124.573721] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  124.574079] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  124.574438] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec0610
[  124.574802] R13: ffff9c494005be08 R14: ffff8eb742ec0b80 R15: ffffffffb5278f90
[  124.575162] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  124.575573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  124.575863] CR2: 000055a96c6349a8 CR3: 0000000036660003 CR4: 0000000000770ef0
[  124.576227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  124.576591] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  124.576951] PKRU: 55555554
[  124.577093] Call Trace:
[  124.577225]  <TASK>
[  124.577342] ? __warn (kernel/panic.c:677) 
[  124.577515] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.577736] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  124.577932] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  124.578116] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  124.578317] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  124.578542] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  124.578761] br_dev_delete (net/bridge/br_if.c:396) 
[  124.578950] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  124.579176] cleanup_net (net/core/net_namespace.c:630) 
[  124.579366] ? process_one_work (kernel/workqueue.c:2606) 
[  124.579588] process_one_work (kernel/workqueue.c:2633) 
[  124.579799] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  124.579995] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  124.580218] kthread (kernel/kthread.c:388) 
[  124.580384] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.580586] ret_from_fork (arch/x86/kernel/process.c:147) 
[  124.580776] ? __pfx_kthread (kernel/kthread.c:341) 
[  124.580971] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  132.091708] ------------[ cut here ]------------
| [  132.092071] sysfs group 'bridge' not found for kobject 'br0'
| [  132.092739] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  132.093486] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  132.095346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  132.096874] Workqueue: netns cleanup_net
[  132.097399] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 132.098069] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  132.100575] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  132.101293] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  132.102228] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  132.103122] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  132.104088] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741936610
[  132.104994] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb742e41750
[  132.105862] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  132.106688] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.107142] CR2: 00007f3dfbd8e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  132.107625] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  132.107983] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  132.108339] PKRU: 55555554
[  132.108483] Call Trace:
[  132.108628]  <TASK>
[  132.108745] ? __warn (kernel/panic.c:677) 
[  132.108920] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.109137] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  132.109333] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  132.109518] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  132.109729] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  132.109954] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.110169] br_dev_delete (net/bridge/br_if.c:396) 
[  132.110361] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  132.110604] cleanup_net (net/core/net_namespace.c:630) 
[  132.110798] ? process_one_work (kernel/workqueue.c:2606) 
[  132.111019] process_one_work (kernel/workqueue.c:2633) 
[  132.111237] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  132.111445] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  132.111683] kthread (kernel/kthread.c:388) 
[  132.111851] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.112048] ret_from_fork (arch/x86/kernel/process.c:147) 
[  132.112250] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.112447] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  132.197786] ------------[ cut here ]------------
| [  132.198159] sysfs group 'bridge' not found for kobject 'br0'
| [  132.198809] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  132.199567] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  132.201460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  132.203040] Workqueue: netns cleanup_net
[  132.203613] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 132.204311] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  132.206836] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  132.207569] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  132.208448] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  132.209324] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  132.210229] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475a610
[  132.211091] R13: ffff9c494005be08 R14: ffff8eb74475ab80 R15: ffff8eb74462c550
[  132.211951] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  132.212703] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.213037] CR2: 00007f3dfbd8e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  132.213478] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  132.214094] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  132.214452] PKRU: 55555554
[  132.214602] Call Trace:
[  132.214735]  <TASK>
[  132.214866] ? __warn (kernel/panic.c:677) 
[  132.215137] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.215481] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  132.215848] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  132.216035] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  132.216377] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  132.216767] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.217238] br_dev_delete (net/bridge/br_if.c:396) 
[  132.217651] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  132.218076] cleanup_net (net/core/net_namespace.c:630) 
[  132.218467] ? process_one_work (kernel/workqueue.c:2606) 
[  132.218896] process_one_work (kernel/workqueue.c:2633) 
[  132.219313] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  132.219728] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  132.220174] kthread (kernel/kthread.c:388) 
[  132.220499] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.220898] ret_from_fork (arch/x86/kernel/process.c:147) 
[  132.221298] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.221727] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  132.226689] ------------[ cut here ]------------
| [  132.227088] sysfs group 'bridge' not found for kobject 'br0'
| [  132.227655] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  132.228380] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  132.229205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  132.229971] Workqueue: netns cleanup_net
[  132.230174] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 132.230535] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  132.232232] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  132.232513] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  132.233027] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  132.233615] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  132.234090] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c8e610
[  132.234744] R13: ffff9c494005be08 R14: ffff8eb741c8eb80 R15: ffff8eb74462c550
[  132.235471] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  132.236284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.236896] CR2: 00007f3dfbd8e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  132.237656] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  132.238364] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  132.239095] PKRU: 55555554
[  132.239379] Call Trace:
[  132.239639]  <TASK>
[  132.239870] ? __warn (kernel/panic.c:677) 
[  132.240230] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.240631] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  132.241028] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  132.241366] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  132.241775] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  132.242212] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.242575] br_dev_delete (net/bridge/br_if.c:396) 
[  132.242910] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  132.243149] cleanup_net (net/core/net_namespace.c:630) 
[  132.243340] ? process_one_work (kernel/workqueue.c:2606) 
[  132.243661] process_one_work (kernel/workqueue.c:2633) 
[  132.243873] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  132.244069] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  132.244289] kthread (kernel/kthread.c:388) 
[  132.244455] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.244781] ret_from_fork (arch/x86/kernel/process.c:147) 
[  132.245087] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.245429] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  132.359689] ------------[ cut here ]------------
| [  132.360139] sysfs group 'bridge' not found for kobject 'br0'
| [  132.360683] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  132.361443] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  132.362691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  132.363353] Workqueue: netns cleanup_net
[  132.363621] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 132.363926] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  132.365088] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  132.365403] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  132.366017] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  132.366469] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  132.367082] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c88610
[  132.367832] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffff8eb74462dc50
[  132.368601] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  132.369448] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.370034] CR2: 00007f3dfbd8e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  132.370792] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  132.371565] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  132.372296] PKRU: 55555554
[  132.372609] Call Trace:
[  132.372889]  <TASK>
[  132.373121] ? __warn (kernel/panic.c:677) 
[  132.373454] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.373890] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  132.374296] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  132.374647] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  132.375009] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  132.375422] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  132.375895] br_dev_delete (net/bridge/br_if.c:396) 
[  132.376257] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  132.376721] cleanup_net (net/core/net_namespace.c:630) 
[  132.377101] ? process_one_work (kernel/workqueue.c:2606) 
[  132.377467] process_one_work (kernel/workqueue.c:2633) 
[  132.377910] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  132.378268] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  132.378683] kthread (kernel/kthread.c:388) 
[  132.378851] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.379070] ret_from_fork (arch/x86/kernel/process.c:147) 
[  132.379304] ? __pfx_kthread (kernel/kthread.c:341) 
[  132.379561] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.488016] ------------[ cut here ]------------
| [  142.488485] sysfs group 'bridge' not found for kobject 'br0'
| [  142.489053] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.489788] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.491100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.492123] Workqueue: netns cleanup_net
[  142.492490] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.492908] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  142.494421] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  142.494849] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  142.495409] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.495802] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  142.496186] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec6610
[  142.496558] R13: ffff9c494005be08 R14: ffff8eb742ec6b80 R15: ffff8eb7418c0050
[  142.496919] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  142.497337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.497659] CR2: 00007f1b7cdc4000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  142.498018] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.498385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.498755] PKRU: 55555554
[  142.498902] Call Trace:
[  142.499034]  <TASK>
[  142.499148] ? __warn (kernel/panic.c:677) 
[  142.499328] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.499556] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.499757] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.499947] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.500152] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.500376] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.500606] br_dev_delete (net/bridge/br_if.c:396) 
[  142.500808] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.501045] cleanup_net (net/core/net_namespace.c:630) 
[  142.501240] ? process_one_work (kernel/workqueue.c:2606) 
[  142.501457] process_one_work (kernel/workqueue.c:2633) 
[  142.501675] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.501880] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.502100] kthread (kernel/kthread.c:388) 
[  142.502311] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.502510] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.502710] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.502903] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.616711] ------------[ cut here ]------------
| [  142.617158] sysfs group 'bridge' not found for kobject 'br0'
| [  142.617502] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.617990] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.618818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.619644] Workqueue: netns cleanup_net
[  142.619956] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.620401] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  142.622178] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  142.622715] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  142.623460] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.624197] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  142.624931] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741936610
[  142.625648] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffffffffb5278f90
[  142.626260] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  142.626962] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.627468] CR2: 00007fda14ba6000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  142.628049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.628689] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.629162] PKRU: 55555554
[  142.629306] Call Trace:
[  142.629457]  <TASK>
[  142.629612] ? __warn (kernel/panic.c:677) 
[  142.629786] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.630185] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.630379] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.630570] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.630863] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.631246] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.631507] br_dev_delete (net/bridge/br_if.c:396) 
[  142.631756] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.632117] cleanup_net (net/core/net_namespace.c:630) 
[  142.632476] ? process_one_work (kernel/workqueue.c:2606) 
[  142.632887] process_one_work (kernel/workqueue.c:2633) 
[  142.633279] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.633645] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.634063] kthread (kernel/kthread.c:388) 
[  142.634372] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.634742] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.635097] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.635465] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.639814] ------------[ cut here ]------------
| [  142.640219] sysfs group 'bridge' not found for kobject 'br0'
| [  142.640717] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.641411] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.642257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.642825] Workqueue: netns cleanup_net
[  142.643028] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.643272] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  142.644187] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  142.644456] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  142.644820] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.645176] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  142.645540] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475a610
[  142.645895] R13: ffff9c494005be08 R14: ffff8eb74475ab80 R15: ffffffffb5278f90
[  142.646258] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  142.646675] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.646963] CR2: 00007fda14ba6000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  142.647320] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.647682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.648038] PKRU: 55555554
[  142.648179] Call Trace:
[  142.648309]  <TASK>
[  142.648425] ? __warn (kernel/panic.c:677) 
[  142.648602] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.648818] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.649011] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.649194] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.649395] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.649618] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.649838] br_dev_delete (net/bridge/br_if.c:396) 
[  142.650026] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.650251] cleanup_net (net/core/net_namespace.c:630) 
[  142.650440] ? process_one_work (kernel/workqueue.c:2606) 
[  142.650662] process_one_work (kernel/workqueue.c:2633) 
[  142.650871] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.651065] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.651287] kthread (kernel/kthread.c:388) 
[  142.651453] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.651654] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.651842] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.652035] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  142.654521] ------------[ cut here ]------------
| [  142.654761] sysfs group 'bridge' not found for kobject 'br0'
| [  142.655057] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  142.655458] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  142.656187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.656756] Workqueue: netns cleanup_net
[  142.656958] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 142.657200] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  142.658116] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  142.658380] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  142.658739] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  142.659094] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  142.659446] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475c610
[  142.659807] R13: ffff9c494005be08 R14: ffff8eb74475cb80 R15: ffffffffb5278f90
[  142.660162] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  142.660568] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  142.660856] CR2: 00007fda14ba6000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  142.661213] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  142.661573] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  142.661929] PKRU: 55555554
[  142.662070] Call Trace:
[  142.662239]  <TASK>
[  142.662354] ? __warn (kernel/panic.c:677) 
[  142.662525] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.662746] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  142.662941] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  142.663124] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  142.663324] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  142.663547] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  142.663763] br_dev_delete (net/bridge/br_if.c:396) 
[  142.663949] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  142.664174] cleanup_net (net/core/net_namespace.c:630) 
[  142.664362] ? process_one_work (kernel/workqueue.c:2606) 
[  142.664581] process_one_work (kernel/workqueue.c:2633) 
[  142.664789] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  142.664984] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  142.665206] kthread (kernel/kthread.c:388) 
[  142.665369] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.665571] ret_from_fork (arch/x86/kernel/process.c:147) 
[  142.665758] ? __pfx_kthread (kernel/kthread.c:341) 
[  142.665952] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  181.789761] ------------[ cut here ]------------
| [  181.790057] sysfs group 'bridge' not found for kobject 'br0'
| [  181.790481] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  181.791065] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  181.791839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  181.792690] Workqueue: netns cleanup_net
[  181.792898] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 181.793198] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  181.794604] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  181.795045] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  181.795627] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  181.796238] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  181.796852] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec6610
[  181.797477] R13: ffff9c494005be08 R14: ffff8eb742ec6b80 R15: ffff8eb7418c0050
[  181.798120] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  181.798828] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  181.799398] CR2: 00007f6caecc8a30 CR3: 0000000036660003 CR4: 0000000000770ef0
[  181.799990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  181.800571] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  181.801157] PKRU: 55555554
[  181.801360] Call Trace:
[  181.801612]  <TASK>
[  181.801812] ? __warn (kernel/panic.c:677) 
[  181.802206] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.802566] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  181.802901] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  181.803086] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  181.803307] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  181.803553] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.803770] br_dev_delete (net/bridge/br_if.c:396) 
[  181.803963] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  181.804199] cleanup_net (net/core/net_namespace.c:630) 
[  181.804390] ? process_one_work (kernel/workqueue.c:2606) 
[  181.804611] process_one_work (kernel/workqueue.c:2633) 
[  181.804825] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  181.805021] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  181.805241] kthread (kernel/kthread.c:388) 
[  181.805410] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.805611] ret_from_fork (arch/x86/kernel/process.c:147) 
[  181.805801] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.805996] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  181.906735] ------------[ cut here ]------------
| [  181.907110] sysfs group 'bridge' not found for kobject 'br0'
| [  181.907420] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  181.907883] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  181.909033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  181.909909] Workqueue: netns cleanup_net
[  181.910174] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 181.910567] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  181.912254] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  181.912722] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  181.913399] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  181.914037] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  181.914676] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca6610
[  181.915300] R13: ffff9c494005be08 R14: ffff8eb744ca6b80 R15: ffff8eb744629750
[  181.915942] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  181.916500] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  181.916857] CR2: 00007f6caecc8a30 CR3: 0000000036660003 CR4: 0000000000770ef0
[  181.917217] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  181.917581] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  181.918079] PKRU: 55555554
[  181.918298] Call Trace:
[  181.918460]  <TASK>
[  181.918584] ? __warn (kernel/panic.c:677) 
[  181.918846] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.919171] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  181.919512] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  181.919837] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  181.920188] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  181.920568] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.920954] br_dev_delete (net/bridge/br_if.c:396) 
[  181.921288] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  181.921687] cleanup_net (net/core/net_namespace.c:630) 
[  181.922035] ? process_one_work (kernel/workqueue.c:2606) 
[  181.922417] process_one_work (kernel/workqueue.c:2633) 
[  181.922791] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  181.923124] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  181.923523] kthread (kernel/kthread.c:388) 
[  181.923827] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.924143] ret_from_fork (arch/x86/kernel/process.c:147) 
[  181.924471] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.924808] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  181.928621] ------------[ cut here ]------------
| [  181.928896] sysfs group 'bridge' not found for kobject 'br0'
| [  181.929370] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  181.929798] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  181.930840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  181.931811] Workqueue: netns cleanup_net
[  181.932177] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 181.932637] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  181.934283] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  181.934780] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  181.935423] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  181.936094] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  181.936723] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec0610
[  181.937297] R13: ffff9c494005be08 R14: ffff8eb742ec0b80 R15: ffff8eb744629750
[  181.937919] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  181.938572] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  181.939038] CR2: 00007f6caecc8a30 CR3: 0000000036660003 CR4: 0000000000770ef0
[  181.939604] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  181.940149] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  181.940537] PKRU: 55555554
[  181.940750] Call Trace:
[  181.940882]  <TASK>
[  181.940998] ? __warn (kernel/panic.c:677) 
[  181.941170] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.941386] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  181.941584] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  181.941771] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  181.941977] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  181.942196] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  181.942414] br_dev_delete (net/bridge/br_if.c:396) 
[  181.942609] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  181.942836] cleanup_net (net/core/net_namespace.c:630) 
[  181.943026] ? process_one_work (kernel/workqueue.c:2606) 
[  181.943245] process_one_work (kernel/workqueue.c:2633) 
[  181.943455] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  181.943657] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  181.943881] kthread (kernel/kthread.c:388) 
[  181.944049] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.944245] ret_from_fork (arch/x86/kernel/process.c:147) 
[  181.944435] ? __pfx_kthread (kernel/kthread.c:341) 
[  181.944634] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  182.054721] ------------[ cut here ]------------
| [  182.055167] sysfs group 'bridge' not found for kobject 'br0'
| [  182.055724] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  182.056436] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  182.057748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  182.058712] Workqueue: netns cleanup_net
[  182.059063] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 182.059455] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  182.060944] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  182.061382] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  182.061941] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  182.062324] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  182.062766] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744634610
[  182.063277] R13: ffff9c494005be08 R14: ffff8eb744634b80 R15: ffff8eb74462c550
[  182.063644] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  182.064129] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  182.064558] CR2: 00007f6caecc8a30 CR3: 0000000036660003 CR4: 0000000000770ef0
[  182.064981] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  182.065439] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  182.065965] PKRU: 55555554
[  182.066193] Call Trace:
[  182.066434]  <TASK>
[  182.066622] ? __warn (kernel/panic.c:677) 
[  182.066878] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  182.067220] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  182.067561] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  182.067852] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  182.068153] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  182.068508] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  182.068872] br_dev_delete (net/bridge/br_if.c:396) 
[  182.069164] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  182.069537] cleanup_net (net/core/net_namespace.c:630) 
[  182.069832] ? process_one_work (kernel/workqueue.c:2606) 
[  182.070180] process_one_work (kernel/workqueue.c:2633) 
[  182.070495] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  182.070814] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  182.071177] kthread (kernel/kthread.c:388) 
[  182.071430] ? __pfx_kthread (kernel/kthread.c:341) 
[  182.071744] ret_from_fork (arch/x86/kernel/process.c:147) 
[  182.072049] ? __pfx_kthread (kernel/kthread.c:341) 
[  182.072364] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  192.255766] ------------[ cut here ]------------
| [  192.256068] sysfs group 'bridge' not found for kobject 'br0'
| [  192.256456] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  192.256898] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  192.257724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  192.258333] Workqueue: netns cleanup_net
[  192.258587] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.258862] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  192.259814] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  192.260123] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  192.260568] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  192.260970] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  192.261372] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[  192.261783] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb74462ae50
[  192.262233] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  192.262708] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.263055] CR2: 00007f499ed8b000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  192.263460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  192.263884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  192.264288] PKRU: 55555554
[  192.264452] Call Trace:
[  192.264644]  <TASK>
[  192.264797] ? __warn (kernel/panic.c:677) 
[  192.265039] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.265306] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  192.265546] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  192.265782] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  192.266018] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  192.266287] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.266540] br_dev_delete (net/bridge/br_if.c:396) 
[  192.266751] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  192.267026] cleanup_net (net/core/net_namespace.c:630) 
[  192.267254] ? process_one_work (kernel/workqueue.c:2606) 
[  192.267561] process_one_work (kernel/workqueue.c:2633) 
[  192.267805] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  192.268044] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  192.268327] kthread (kernel/kthread.c:388) 
[  192.268497] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.268709] ret_from_fork (arch/x86/kernel/process.c:147) 
[  192.268931] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.269130] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  192.409722] ------------[ cut here ]------------
| [  192.410036] sysfs group 'bridge' not found for kobject 'br0'
| [  192.410436] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  192.411260] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  192.412771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  192.413931] Workqueue: netns cleanup_net
[  192.414285] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.414785] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  192.416646] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  192.417150] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  192.417794] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  192.418453] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  192.419103] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744630610
[  192.419824] R13: ffff9c494005be08 R14: ffff8eb744630b80 R15: ffffffffb5278f90
[  192.420457] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  192.421180] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.421613] CR2: 00007ffd0044cbc8 CR3: 0000000036660004 CR4: 0000000000770ef0
[  192.422386] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  192.423102] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  192.423790] PKRU: 55555554
[  192.424016] Call Trace:
[  192.424257]  <TASK>
[  192.424490] ? __warn (kernel/panic.c:677) 
[  192.424745] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.424982] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  192.425226] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  192.425446] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  192.425685] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  192.426054] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.426345] br_dev_delete (net/bridge/br_if.c:396) 
[  192.426576] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  192.426834] cleanup_net (net/core/net_namespace.c:630) 
[  192.427128] ? process_one_work (kernel/workqueue.c:2606) 
[  192.427455] process_one_work (kernel/workqueue.c:2633) 
[  192.427933] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  192.428129] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  192.428424] kthread (kernel/kthread.c:388) 
[  192.428717] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.429014] ret_from_fork (arch/x86/kernel/process.c:147) 
[  192.429352] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.429735] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  192.434295] ------------[ cut here ]------------
| [  192.434786] sysfs group 'bridge' not found for kobject 'br0'
| [  192.435337] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  192.436184] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  192.437579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  192.438558] Workqueue: netns cleanup_net
[  192.438948] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.439363] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  192.440966] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  192.441463] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  192.441986] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  192.442637] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  192.443250] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475c610
[  192.443735] R13: ffff9c494005be08 R14: ffff8eb74475cb80 R15: ffffffffb5278f90
[  192.444132] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  192.444667] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.444958] CR2: 000055a96ba3cdec CR3: 000000000444c006 CR4: 0000000000770ef0
[  192.445319] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  192.445687] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  192.446055] PKRU: 55555554
[  192.446198] Call Trace:
[  192.446330]  <TASK>
[  192.446448] ? __warn (kernel/panic.c:677) 
[  192.446627] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.446852] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  192.447046] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  192.447231] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  192.447435] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  192.447666] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.447885] br_dev_delete (net/bridge/br_if.c:396) 
[  192.448086] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  192.448324] cleanup_net (net/core/net_namespace.c:630) 
[  192.448515] ? process_one_work (kernel/workqueue.c:2606) 
[  192.448752] process_one_work (kernel/workqueue.c:2633) 
[  192.448964] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  192.449166] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  192.449390] kthread (kernel/kthread.c:388) 
[  192.449573] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.449774] ret_from_fork (arch/x86/kernel/process.c:147) 
[  192.449969] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.450167] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  192.452719] ------------[ cut here ]------------
| [  192.452957] sysfs group 'bridge' not found for kobject 'br0'
| [  192.453259] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  192.453672] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  192.454401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  192.454974] Workqueue: netns cleanup_net
[  192.455179] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 192.455423] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  192.456361] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  192.456633] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  192.457003] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  192.457359] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  192.457733] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744634610
[  192.458094] R13: ffff9c494005be08 R14: ffff8eb744634b80 R15: ffffffffb5278f90
[  192.458461] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  192.458868] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.459159] CR2: 000055a96ba3cdec CR3: 000000000444c006 CR4: 0000000000770ef0
[  192.459538] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  192.459897] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  192.460263] PKRU: 55555554
[  192.460410] Call Trace:
[  192.460550]  <TASK>
[  192.460666] ? __warn (kernel/panic.c:677) 
[  192.460838] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.461053] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  192.461255] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  192.461443] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  192.461653] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  192.461884] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  192.462101] br_dev_delete (net/bridge/br_if.c:396) 
[  192.462290] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  192.462517] cleanup_net (net/core/net_namespace.c:630) 
[  192.462713] ? process_one_work (kernel/workqueue.c:2606) 
[  192.462930] process_one_work (kernel/workqueue.c:2633) 
[  192.463140] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  192.463336] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  192.463566] kthread (kernel/kthread.c:388) 
[  192.463733] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.463929] ret_from_fork (arch/x86/kernel/process.c:147) 
[  192.464117] ? __pfx_kthread (kernel/kthread.c:341) 
[  192.464311] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  232.835741] ------------[ cut here ]------------
| [  232.836008] sysfs group 'bridge' not found for kobject 'br0'
| [  232.836343] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  232.836797] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  232.837599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  232.838204] Workqueue: netns cleanup_net
[  232.838461] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 232.838786] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  232.839803] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  232.840091] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  232.840633] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  232.841080] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  232.841486] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec2610
[  232.841895] R13: ffff9c494005be08 R14: ffff8eb742ec2b80 R15: ffff8eb742e42e50
[  232.842294] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  232.842737] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  232.843100] CR2: 00007f6caecc8a30 CR3: 0000000036660001 CR4: 0000000000770ef0
[  232.843502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  232.843878] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  232.844287] PKRU: 55555554
[  232.844477] Call Trace:
[  232.844652]  <TASK>
[  232.844788] ? __warn (kernel/panic.c:677) 
[  232.845009] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  232.845271] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  232.845489] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  232.845696] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  232.845933] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  232.846191] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  232.846447] br_dev_delete (net/bridge/br_if.c:396) 
[  232.846662] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  232.846930] cleanup_net (net/core/net_namespace.c:630) 
[  232.847164] ? process_one_work (kernel/workqueue.c:2606) 
[  232.847421] process_one_work (kernel/workqueue.c:2633) 
[  232.847670] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  232.847908] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  232.848183] kthread (kernel/kthread.c:388) 
[  232.848398] ? __pfx_kthread (kernel/kthread.c:341) 
[  232.848633] ret_from_fork (arch/x86/kernel/process.c:147) 
[  232.848869] ? __pfx_kthread (kernel/kthread.c:341) 
[  232.849123] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  232.971814] ------------[ cut here ]------------
| [  232.972175] sysfs group 'bridge' not found for kobject 'br0'
| [  232.972643] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  232.973316] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  232.974144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  232.974927] Workqueue: netns cleanup_net
[  232.975134] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 232.975384] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  232.976431] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  232.976901] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  232.977332] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  232.977888] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  232.978559] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d0610
[  232.979169] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffff8eb744628050
[  232.979838] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  232.980576] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  232.981138] CR2: 000055a96c5fde50 CR3: 0000000036660004 CR4: 0000000000770ef0
[  232.981843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  232.982498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  232.983261] PKRU: 55555554
[  232.983534] Call Trace:
[  232.983808]  <TASK>
[  232.984046] ? __warn (kernel/panic.c:677) 
[  232.984341] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  232.984751] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  232.985175] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  232.985632] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  232.986005] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  232.986496] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  232.987004] br_dev_delete (net/bridge/br_if.c:396) 
[  232.987410] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  232.987892] cleanup_net (net/core/net_namespace.c:630) 
[  232.988224] ? process_one_work (kernel/workqueue.c:2606) 
[  232.988540] process_one_work (kernel/workqueue.c:2633) 
[  232.988882] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  232.989260] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  232.989615] kthread (kernel/kthread.c:388) 
[  232.989853] ? __pfx_kthread (kernel/kthread.c:341) 
[  232.990129] ret_from_fork (arch/x86/kernel/process.c:147) 
[  232.990402] ? __pfx_kthread (kernel/kthread.c:341) 
[  232.990767] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  232.995478] ------------[ cut here ]------------
| [  232.995889] sysfs group 'bridge' not found for kobject 'br0'
| [  232.996348] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  232.997092] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  232.998346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  232.999493] Workqueue: netns cleanup_net
[  232.999930] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 233.000500] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  233.002572] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  233.003041] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  233.003556] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  233.004128] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  233.004629] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb74475c610
[  233.005215] R13: ffff9c494005be08 R14: ffff8eb74475cb80 R15: ffff8eb744628050
[  233.005980] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  233.006725] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  233.007496] CR2: 000055a96c5fde50 CR3: 0000000036660004 CR4: 0000000000770ef0
[  233.008465] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  233.009306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  233.010101] PKRU: 55555554
[  233.010412] Call Trace:
[  233.010680]  <TASK>
[  233.010909] ? __warn (kernel/panic.c:677) 
[  233.011296] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  233.011785] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  233.012214] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  233.012574] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  233.013011] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  233.013464] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  233.013951] br_dev_delete (net/bridge/br_if.c:396) 
[  233.014340] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  233.014840] cleanup_net (net/core/net_namespace.c:630) 
[  233.015270] ? process_one_work (kernel/workqueue.c:2606) 
[  233.015743] process_one_work (kernel/workqueue.c:2633) 
[  233.016246] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  233.016585] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  233.016916] kthread (kernel/kthread.c:388) 
[  233.017180] ? __pfx_kthread (kernel/kthread.c:341) 
[  233.017609] ret_from_fork (arch/x86/kernel/process.c:147) 
[  233.017866] ? __pfx_kthread (kernel/kthread.c:341) 
[  233.018126] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  233.213741] ------------[ cut here ]------------
| [  233.214004] sysfs group 'bridge' not found for kobject 'br0'
| [  233.214323] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  233.214749] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  233.215762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  233.216412] Workqueue: netns cleanup_net
[  233.216720] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 233.217050] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  233.218787] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  233.219280] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  233.219981] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  233.220651] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  233.221341] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d6610
[  233.222026] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb7450c4550
[  233.222742] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  233.223507] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  233.224075] CR2: 00007fc2744d9000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  233.224766] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  233.225423] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  233.226105] PKRU: 55555554
[  233.226354] Call Trace:
[  233.226631]  <TASK>
[  233.226817] ? __warn (kernel/panic.c:677) 
[  233.227139] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  233.227509] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  233.227903] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  233.228230] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  233.228534] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  233.228955] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  233.229319] br_dev_delete (net/bridge/br_if.c:396) 
[  233.229690] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  233.229920] cleanup_net (net/core/net_namespace.c:630) 
[  233.230111] ? process_one_work (kernel/workqueue.c:2606) 
[  233.230354] process_one_work (kernel/workqueue.c:2633) 
[  233.230575] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  233.230830] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  233.231102] kthread (kernel/kthread.c:388) 
[  233.231271] ? __pfx_kthread (kernel/kthread.c:341) 
[  233.231612] ret_from_fork (arch/x86/kernel/process.c:147) 
[  233.231896] ? __pfx_kthread (kernel/kthread.c:341) 
[  233.232094] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  241.745702] ------------[ cut here ]------------
| [  241.746044] sysfs group 'bridge' not found for kobject 'br0'
| [  241.746408] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  241.746982] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  241.747975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  241.748741] Workqueue: netns cleanup_net
[  241.749124] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 241.749610] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  241.751433] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  241.752003] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  241.752725] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  241.753453] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  241.754163] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7479a2610
[  241.754787] R13: ffff9c494005be08 R14: ffff8eb7479a2b80 R15: ffff8eb744628050
[  241.755442] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  241.756149] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  241.756653] CR2: 00007f7745854000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  241.757229] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  241.757606] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  241.757991] PKRU: 55555554
[  241.758133] Call Trace:
[  241.758265]  <TASK>
[  241.758381] ? __warn (kernel/panic.c:677) 
[  241.758558] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.758774] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  241.758968] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  241.759151] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  241.759352] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  241.759578] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.759796] br_dev_delete (net/bridge/br_if.c:396) 
[  241.759986] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  241.760212] cleanup_net (net/core/net_namespace.c:630) 
[  241.760402] ? process_one_work (kernel/workqueue.c:2606) 
[  241.760624] process_one_work (kernel/workqueue.c:2633) 
[  241.760834] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  241.761030] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  241.761253] kthread (kernel/kthread.c:388) 
[  241.761420] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.761634] ret_from_fork (arch/x86/kernel/process.c:147) 
[  241.761824] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.762018] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  241.885699] ------------[ cut here ]------------
| [  241.886139] sysfs group 'bridge' not found for kobject 'br0'
| [  241.886443] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  241.886922] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  241.887817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  241.888681] Workqueue: netns cleanup_net
[  241.888885] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 241.889267] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  241.890927] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  241.891413] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  241.892081] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  241.892729] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  241.893361] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f0610
[  241.893996] R13: ffff9c494005be08 R14: ffff8eb7421f0b80 R15: ffffffffb5278f90
[  241.894648] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  241.895368] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  241.895872] CR2: 00007fb55536f270 CR3: 0000000036660004 CR4: 0000000000770ef0
[  241.896460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  241.897052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  241.897623] PKRU: 55555554
[  241.897877] Call Trace:
[  241.898069]  <TASK>
[  241.898261] ? __warn (kernel/panic.c:677) 
[  241.898556] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.898771] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  241.898978] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  241.899198] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  241.899433] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  241.899660] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.899875] br_dev_delete (net/bridge/br_if.c:396) 
[  241.900065] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  241.900293] cleanup_net (net/core/net_namespace.c:630) 
[  241.900482] ? process_one_work (kernel/workqueue.c:2606) 
[  241.900703] process_one_work (kernel/workqueue.c:2633) 
[  241.900914] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  241.901110] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  241.901332] kthread (kernel/kthread.c:388) 
[  241.901497] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.901706] ret_from_fork (arch/x86/kernel/process.c:147) 
[  241.901896] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.902090] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  241.904579] ------------[ cut here ]------------
| [  241.904814] sysfs group 'bridge' not found for kobject 'br0'
| [  241.905115] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  241.905516] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  241.906246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  241.906813] Workqueue: netns cleanup_net
[  241.907018] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 241.907262] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  241.908183] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  241.908449] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  241.908808] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  241.909165] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  241.909521] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f6610
[  241.909882] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffffffffb5278f90
[  241.910240] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  241.910646] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  241.910937] CR2: 00007fb55536f270 CR3: 0000000036660004 CR4: 0000000000770ef0
[  241.911293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  241.911685] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  241.912040] PKRU: 55555554
[  241.912184] Call Trace:
[  241.912314]  <TASK>
[  241.912429] ? __warn (kernel/panic.c:677) 
[  241.912604] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.912819] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  241.913010] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  241.913193] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  241.913391] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  241.913615] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.913830] br_dev_delete (net/bridge/br_if.c:396) 
[  241.914015] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  241.914243] cleanup_net (net/core/net_namespace.c:630) 
[  241.914432] ? process_one_work (kernel/workqueue.c:2606) 
[  241.914651] process_one_work (kernel/workqueue.c:2633) 
[  241.914863] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  241.915058] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  241.915276] kthread (kernel/kthread.c:388) 
[  241.915443] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.915642] ret_from_fork (arch/x86/kernel/process.c:147) 
[  241.915830] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.916025] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  241.918555] ------------[ cut here ]------------
| [  241.918793] sysfs group 'bridge' not found for kobject 'br0'
| [  241.919092] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  241.919495] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[  241.920224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  241.920792] Workqueue: netns cleanup_net
[  241.920994] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 241.921238] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  241.922173] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  241.922438] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  241.922798] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  241.923153] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  241.923507] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742ec0610
[  241.923872] R13: ffff9c494005be08 R14: ffff8eb742ec0b80 R15: ffffffffb5278f90
[  241.924229] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  241.924634] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  241.924923] CR2: 00007fb55536f270 CR3: 0000000036660004 CR4: 0000000000770ef0
[  241.925279] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  241.925638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  241.925995] PKRU: 55555554
[  241.926135] Call Trace:
[  241.926265]  <TASK>
[  241.926379] ? __warn (kernel/panic.c:677) 
[  241.926554] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.926769] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  241.926960] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  241.927143] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  241.927343] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  241.927565] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  241.927781] br_dev_delete (net/bridge/br_if.c:396) 
[  241.927968] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  241.928194] cleanup_net (net/core/net_namespace.c:630) 
[  241.928382] ? process_one_work (kernel/workqueue.c:2606) 
[  241.928602] process_one_work (kernel/workqueue.c:2633) 
[  241.928810] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  241.929005] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  241.929226] kthread (kernel/kthread.c:388) 
[  241.929389] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.929591] ret_from_fork (arch/x86/kernel/process.c:147) 
[  241.929778] ? __pfx_kthread (kernel/kthread.c:341) 
[  241.929972] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  251.755830] ------------[ cut here ]------------
| [  251.756316] sysfs group 'bridge' not found for kobject 'br0'
| [  251.756923] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  251.757561] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  251.759794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  251.761515] Workqueue: netns cleanup_net
[  251.762015] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 251.762509] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  251.764501] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  251.765042] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  251.765730] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  251.766372] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  251.767057] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca6610
[  251.767616] R13: ffff9c494005be08 R14: ffff8eb744ca6b80 R15: ffff8eb7450c2e50
[  251.768189] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  251.768891] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  251.769401] CR2: 000055a96c63f3a0 CR3: 0000000036660001 CR4: 0000000000770ef0
[  251.769994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  251.770581] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  251.771194] PKRU: 55555554
[  251.771417] Call Trace:
[  251.771644]  <TASK>
[  251.771846] ? __warn (kernel/panic.c:677) 
[  251.772144] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.772360] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  251.772570] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  251.772785] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  251.772985] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  251.773247] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.773463] br_dev_delete (net/bridge/br_if.c:396) 
[  251.773682] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  251.773912] cleanup_net (net/core/net_namespace.c:630) 
[  251.774102] ? process_one_work (kernel/workqueue.c:2606) 
[  251.774318] process_one_work (kernel/workqueue.c:2633) 
[  251.774559] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  251.774757] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  251.774978] kthread (kernel/kthread.c:388) 
[  251.775143] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.775339] ret_from_fork (arch/x86/kernel/process.c:147) 
[  251.775542] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.775741] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  251.873818] ------------[ cut here ]------------
| [  251.874317] sysfs group 'bridge' not found for kobject 'br0'
| [  251.874908] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  251.875701] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  251.877316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  251.878321] Workqueue: netns cleanup_net
[  251.878731] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 251.879143] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  251.880822] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  251.881260] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  251.881924] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  251.882544] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  251.882936] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742704610
[  251.883346] R13: ffff9c494005be08 R14: ffff8eb742704b80 R15: ffff8eb7418c2e50
[  251.883894] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  251.884349] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  251.884689] CR2: 000055a96c63f3a0 CR3: 0000000036660001 CR4: 0000000000770ef0
[  251.885081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  251.885590] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  251.886193] PKRU: 55555554
[  251.886378] Call Trace:
[  251.886518]  <TASK>
[  251.886682] ? __warn (kernel/panic.c:677) 
[  251.886968] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.887306] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  251.887690] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  251.888047] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  251.888432] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  251.888892] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.889290] br_dev_delete (net/bridge/br_if.c:396) 
[  251.889664] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  251.890092] cleanup_net (net/core/net_namespace.c:630) 
[  251.890456] ? process_one_work (kernel/workqueue.c:2606) 
[  251.890884] process_one_work (kernel/workqueue.c:2633) 
[  251.891263] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  251.891673] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  251.892100] kthread (kernel/kthread.c:388) 
[  251.892436] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.892804] ret_from_fork (arch/x86/kernel/process.c:147) 
[  251.893152] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.893546] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  251.898225] ------------[ cut here ]------------
| [  251.898644] sysfs group 'bridge' not found for kobject 'br0'
| [  251.899184] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  251.899931] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  251.900936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  251.901769] Workqueue: netns cleanup_net
[  251.901981] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 251.902226] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  251.903802] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  251.904177] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  251.904803] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  251.905414] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  251.905917] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca2610
[  251.906562] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb7418c2e50
[  251.907242] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  251.908046] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  251.908618] CR2: 000055a96c63f3a0 CR3: 0000000036660001 CR4: 0000000000770ef0
[  251.909312] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  251.910025] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  251.910712] PKRU: 55555554
[  251.910987] Call Trace:
[  251.911257]  <TASK>
[  251.911490] ? __warn (kernel/panic.c:677) 
[  251.911800] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.912232] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  251.912630] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  251.912984] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  251.913366] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  251.913792] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  251.914209] br_dev_delete (net/bridge/br_if.c:396) 
[  251.914606] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  251.914859] cleanup_net (net/core/net_namespace.c:630) 
[  251.915048] ? process_one_work (kernel/workqueue.c:2606) 
[  251.915375] process_one_work (kernel/workqueue.c:2633) 
[  251.915590] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  251.915786] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  251.916007] kthread (kernel/kthread.c:388) 
[  251.916181] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.916390] ret_from_fork (arch/x86/kernel/process.c:147) 
[  251.916668] ? __pfx_kthread (kernel/kthread.c:341) 
[  251.916930] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  252.045715] ------------[ cut here ]------------
| [  252.046195] sysfs group 'bridge' not found for kobject 'br0'
| [  252.046798] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  252.047615] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  252.049278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  252.050354] Workqueue: netns cleanup_net
[  252.050727] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 252.051176] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  252.052793] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  252.053075] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  252.053525] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  252.054056] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  252.054520] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421bc610
[  252.054943] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb742e40050
[  252.055588] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  252.056116] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  252.056611] CR2: 000055a96c63f3a0 CR3: 0000000036660001 CR4: 0000000000770ef0
[  252.057314] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  252.058035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  252.058782] PKRU: 55555554
[  252.059065] Call Trace:
[  252.059331]  <TASK>
[  252.059570] ? __warn (kernel/panic.c:677) 
[  252.059884] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  252.060305] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  252.060707] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  252.061076] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  252.061469] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  252.061863] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  252.062275] br_dev_delete (net/bridge/br_if.c:396) 
[  252.062623] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  252.063100] cleanup_net (net/core/net_namespace.c:630) 
[  252.063502] ? process_one_work (kernel/workqueue.c:2606) 
[  252.063969] process_one_work (kernel/workqueue.c:2633) 
[  252.064516] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  252.065141] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  252.065799] kthread (kernel/kthread.c:388) 
[  252.066263] ? __pfx_kthread (kernel/kthread.c:341) 
[  252.066841] ret_from_fork (arch/x86/kernel/process.c:147) 
[  252.067429] ? __pfx_kthread (kernel/kthread.c:341) 
[  252.067991] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  261.728788] ------------[ cut here ]------------
| [  261.729276] sysfs group 'bridge' not found for kobject 'br0'
| [  261.729912] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  261.730812] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  261.732638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  261.733711] Workqueue: netns cleanup_net
[  261.734173] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 261.734788] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  261.736574] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  261.736996] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  261.737383] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  261.737781] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  261.738144] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742700610
[  261.738502] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffff8eb7450c1750
[  261.738875] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  261.739279] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  261.739583] CR2: 00007f6caeac90e0 CR3: 0000000036660006 CR4: 0000000000770ef0
[  261.739948] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  261.740306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  261.740674] PKRU: 55555554
[  261.740816] Call Trace:
[  261.740949]  <TASK>
[  261.741068] ? __warn (kernel/panic.c:677) 
[  261.741248] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.741465] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  261.741750] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  261.741945] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  261.742147] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  261.742371] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.742596] br_dev_delete (net/bridge/br_if.c:396) 
[  261.742788] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  261.743022] cleanup_net (net/core/net_namespace.c:630) 
[  261.743219] ? process_one_work (kernel/workqueue.c:2606) 
[  261.743442] process_one_work (kernel/workqueue.c:2633) 
[  261.743667] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  261.743872] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  261.744096] kthread (kernel/kthread.c:388) 
[  261.744273] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.744469] ret_from_fork (arch/x86/kernel/process.c:147) 
[  261.744670] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.744873] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  261.862767] ------------[ cut here ]------------
| [  261.863324] sysfs group 'bridge' not found for kobject 'br0'
| [  261.863921] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  261.864700] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  261.866287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  261.867314] Workqueue: netns cleanup_net
[  261.867625] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 261.868053] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  261.869490] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  261.869837] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  261.870309] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  261.870955] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  261.871345] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca4610
[  261.871735] R13: ffff9c494005be08 R14: ffff8eb744ca4b80 R15: ffff8eb742e40050
[  261.872211] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  261.873125] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  261.873621] CR2: 00007f6caeac90e0 CR3: 0000000036660006 CR4: 0000000000770ef0
[  261.874290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  261.874851] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  261.875401] PKRU: 55555554
[  261.875797] Call Trace:
[  261.876175]  <TASK>
[  261.876475] ? __warn (kernel/panic.c:677) 
[  261.876872] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.877334] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  261.877726] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  261.878110] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  261.878613] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  261.879100] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.879594] br_dev_delete (net/bridge/br_if.c:396) 
[  261.880031] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  261.880524] cleanup_net (net/core/net_namespace.c:630) 
[  261.880979] ? process_one_work (kernel/workqueue.c:2606) 
[  261.881565] process_one_work (kernel/workqueue.c:2633) 
[  261.881983] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  261.882459] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  261.882859] kthread (kernel/kthread.c:388) 
[  261.883048] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.883248] ret_from_fork (arch/x86/kernel/process.c:147) 
[  261.883536] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.883753] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  261.887305] ------------[ cut here ]------------
| [  261.887697] sysfs group 'bridge' not found for kobject 'br0'
| [  261.888231] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  261.889053] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  261.890733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  261.891824] Workqueue: netns cleanup_net
[  261.892212] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 261.892697] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  261.894523] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  261.895029] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  261.895741] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  261.896411] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  261.897001] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb742702610
[  261.897648] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffff8eb742e40050
[  261.898302] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  261.899078] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  261.899612] CR2: 00007f6caeac90e0 CR3: 0000000036660006 CR4: 0000000000770ef0
[  261.900278] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  261.900896] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  261.901384] PKRU: 55555554
[  261.901601] Call Trace:
[  261.901747]  <TASK>
[  261.901874] ? __warn (kernel/panic.c:677) 
[  261.902074] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.902338] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  261.902641] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  261.902937] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  261.903137] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  261.903413] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  261.903658] br_dev_delete (net/bridge/br_if.c:396) 
[  261.903911] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  261.904240] cleanup_net (net/core/net_namespace.c:630) 
[  261.904546] ? process_one_work (kernel/workqueue.c:2606) 
[  261.904903] process_one_work (kernel/workqueue.c:2633) 
[  261.905115] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  261.905465] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  261.905855] kthread (kernel/kthread.c:388) 
[  261.906147] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.906614] ret_from_fork (arch/x86/kernel/process.c:147) 
[  261.907007] ? __pfx_kthread (kernel/kthread.c:341) 
[  261.907474] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  262.014747] ------------[ cut here ]------------
| [  262.015177] sysfs group 'bridge' not found for kobject 'br0'
| [  262.015686] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  262.016321] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  262.017677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  262.018264] Workqueue: netns cleanup_net
[  262.018509] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 262.018768] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  262.019804] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  262.020225] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  262.020664] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  262.021259] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  262.021872] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741d46610
[  262.022447] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffff8eb7418c2e50
[  262.023047] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  262.023708] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  262.024190] CR2: 00007f6caeac90e0 CR3: 0000000036660001 CR4: 0000000000770ef0
[  262.024758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  262.025350] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  262.025958] PKRU: 55555554
[  262.026195] Call Trace:
[  262.026427]  <TASK>
[  262.026608] ? __warn (kernel/panic.c:677) 
[  262.026850] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  262.027230] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  262.027554] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  262.027815] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  262.028151] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  262.028506] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  262.028842] br_dev_delete (net/bridge/br_if.c:396) 
[  262.029178] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  262.029524] cleanup_net (net/core/net_namespace.c:630) 
[  262.029825] ? process_one_work (kernel/workqueue.c:2606) 
[  262.030146] process_one_work (kernel/workqueue.c:2633) 
[  262.030526] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  262.030832] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  262.031168] kthread (kernel/kthread.c:388) 
[  262.031340] ? __pfx_kthread (kernel/kthread.c:341) 
[  262.031571] ret_from_fork (arch/x86/kernel/process.c:147) 
[  262.031796] ? __pfx_kthread (kernel/kthread.c:341) 
[  262.032023] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  271.688719] ------------[ cut here ]------------
| [  271.688992] sysfs group 'bridge' not found for kobject 'br0'
| [  271.689451] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  271.690118] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  271.691552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  271.692511] Workqueue: netns cleanup_net
[  271.692829] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 271.693358] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  271.695384] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  271.696001] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  271.696822] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  271.697635] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  271.698412] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca2610
[  271.699227] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb742e40050
[  271.699689] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  271.700117] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  271.700414] CR2: 00007fa5dcaf2000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  271.700855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  271.701212] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  271.701680] PKRU: 55555554
[  271.701837] Call Trace:
[  271.701980]  <TASK>
[  271.702107] ? __warn (kernel/panic.c:677) 
[  271.702296] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.702543] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  271.702751] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  271.702938] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  271.703139] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  271.703361] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.703591] br_dev_delete (net/bridge/br_if.c:396) 
[  271.703785] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  271.704015] cleanup_net (net/core/net_namespace.c:630) 
[  271.704206] ? process_one_work (kernel/workqueue.c:2606) 
[  271.704427] process_one_work (kernel/workqueue.c:2633) 
[  271.704642] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  271.704838] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  271.705061] kthread (kernel/kthread.c:388) 
[  271.705233] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.705428] ret_from_fork (arch/x86/kernel/process.c:147) 
[  271.705625] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.705820] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  271.824733] ------------[ cut here ]------------
| [  271.825182] sysfs group 'bridge' not found for kobject 'br0'
| [  271.825707] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  271.826382] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  271.827572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  271.828339] Workqueue: netns cleanup_net
[  271.828553] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 271.828799] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  271.830107] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  271.830547] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  271.831312] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  271.832009] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  271.832663] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca6610
[  271.833328] R13: ffff9c494005be08 R14: ffff8eb744ca6b80 R15: ffffffffb5278f90
[  271.833974] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  271.834784] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  271.835382] CR2: 00007fa5dcaf2000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  271.836100] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  271.836813] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  271.837449] PKRU: 55555554
[  271.837719] Call Trace:
[  271.837982]  <TASK>
[  271.838192] ? __warn (kernel/panic.c:677) 
[  271.838536] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.838950] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  271.839322] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  271.839641] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  271.839995] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  271.840459] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.840712] br_dev_delete (net/bridge/br_if.c:396) 
[  271.840933] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  271.841246] cleanup_net (net/core/net_namespace.c:630) 
[  271.841484] ? process_one_work (kernel/workqueue.c:2606) 
[  271.841736] process_one_work (kernel/workqueue.c:2633) 
[  271.841955] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  271.842161] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  271.842385] kthread (kernel/kthread.c:388) 
[  271.842563] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.842768] ret_from_fork (arch/x86/kernel/process.c:147) 
[  271.842959] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.843165] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  271.845735] ------------[ cut here ]------------
| [  271.846017] sysfs group 'bridge' not found for kobject 'br0'
| [  271.846403] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  271.846849] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  271.847747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  271.848329] Workqueue: netns cleanup_net
[  271.848547] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 271.848795] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  271.849742] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  271.850011] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  271.850425] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  271.850804] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  271.851183] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca0610
[  271.851571] R13: ffff9c494005be08 R14: ffff8eb744ca0b80 R15: ffffffffb5278f90
[  271.851931] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  271.852343] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  271.852645] CR2: 000055a96ba3cdec CR3: 000000000444c004 CR4: 0000000000770ef0
[  271.853006] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  271.853375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  271.853749] PKRU: 55555554
[  271.853892] Call Trace:
[  271.854027]  <TASK>
[  271.854147] ? __warn (kernel/panic.c:677) 
[  271.854361] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.854602] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  271.854797] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  271.854982] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  271.855182] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  271.855404] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.855631] br_dev_delete (net/bridge/br_if.c:396) 
[  271.855823] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  271.856052] cleanup_net (net/core/net_namespace.c:630) 
[  271.856242] ? process_one_work (kernel/workqueue.c:2606) 
[  271.856459] process_one_work (kernel/workqueue.c:2633) 
[  271.856679] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  271.856875] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  271.857097] kthread (kernel/kthread.c:388) 
[  271.857263] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.857461] ret_from_fork (arch/x86/kernel/process.c:147) 
[  271.857660] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.857855] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  271.860365] ------------[ cut here ]------------
| [  271.860619] sysfs group 'bridge' not found for kobject 'br0'
| [  271.860926] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  271.861332] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  271.862231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  271.862806] Workqueue: netns cleanup_net
[  271.863010] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 271.863255] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  271.864181] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  271.864446] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  271.864810] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  271.865168] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  271.865522] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741d46610
[  271.865889] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffffffffb5278f90
[  271.866271] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  271.866720] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  271.867010] CR2: 000055a96ba3cdec CR3: 000000000444c004 CR4: 0000000000770ef0
[  271.867381] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  271.867747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  271.868127] PKRU: 55555554
[  271.868269] Call Trace:
[  271.868412]  <TASK>
[  271.868541] ? __warn (kernel/panic.c:677) 
[  271.868732] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.868950] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  271.869157] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  271.869346] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  271.869559] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  271.869794] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  271.870048] br_dev_delete (net/bridge/br_if.c:396) 
[  271.870249] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  271.870482] cleanup_net (net/core/net_namespace.c:630) 
[  271.870688] ? process_one_work (kernel/workqueue.c:2606) 
[  271.870906] process_one_work (kernel/workqueue.c:2633) 
[  271.871115] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  271.871311] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  271.871680] kthread (kernel/kthread.c:388) 
[  271.871849] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.872046] ret_from_fork (arch/x86/kernel/process.c:147) 
[  271.872236] ? __pfx_kthread (kernel/kthread.c:341) 
[  271.872431] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  281.470831] ------------[ cut here ]------------
| [  281.471622] sysfs group 'bridge' not found for kobject 'br0'
| [  281.472467] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  281.473669] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  281.476060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  281.477597] Workqueue: netns cleanup_net
[  281.478151] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 281.478765] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  281.480710] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  281.481330] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  281.481899] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  281.482811] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  281.483508] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f2610
[  281.484666] R13: ffff9c494005be08 R14: ffff8eb7421f2b80 R15: ffff8eb742e41750
[  281.485896] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  281.487240] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  281.488224] CR2: 00007f6caeac90e0 CR3: 0000000036660002 CR4: 0000000000770ef0
[  281.489404] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  281.490433] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  281.491547] PKRU: 55555554
[  281.491929] Call Trace:
[  281.492294]  <TASK>
[  281.492683] ? __warn (kernel/panic.c:677) 
[  281.493161] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.493594] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  281.493922] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  281.494235] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  281.494553] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  281.494896] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.495232] br_dev_delete (net/bridge/br_if.c:396) 
[  281.495540] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  281.495900] cleanup_net (net/core/net_namespace.c:630) 
[  281.496196] ? process_one_work (kernel/workqueue.c:2606) 
[  281.496524] process_one_work (kernel/workqueue.c:2633) 
[  281.496865] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  281.497165] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  281.497500] kthread (kernel/kthread.c:388) 
[  281.497766] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.498063] ret_from_fork (arch/x86/kernel/process.c:147) 
[  281.498353] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.498662] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  281.651740] ------------[ cut here ]------------
| [  281.652239] sysfs group 'bridge' not found for kobject 'br0'
| [  281.652787] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  281.653229] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  281.654268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  281.654848] Workqueue: netns cleanup_net
[  281.655055] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 281.655304] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  281.656240] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  281.656507] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  281.656879] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  281.657240] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  281.657606] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421ba610
[  281.657967] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffffffffb5278f90
[  281.658328] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  281.658744] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  281.659038] CR2: 00007f6caeac90e0 CR3: 0000000036660002 CR4: 0000000000770ef0
[  281.659397] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  281.659761] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  281.660120] PKRU: 55555554
[  281.660262] Call Trace:
[  281.660396]  <TASK>
[  281.660511] ? __warn (kernel/panic.c:677) 
[  281.660689] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.660906] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  281.661100] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  281.661285] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  281.661493] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  281.661719] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.661938] br_dev_delete (net/bridge/br_if.c:396) 
[  281.662127] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  281.662355] cleanup_net (net/core/net_namespace.c:630) 
[  281.662554] ? process_one_work (kernel/workqueue.c:2606) 
[  281.662770] process_one_work (kernel/workqueue.c:2633) 
[  281.662980] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  281.663178] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  281.663399] kthread (kernel/kthread.c:388) 
[  281.663573] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.663769] ret_from_fork (arch/x86/kernel/process.c:147) 
[  281.663958] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.664152] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  281.666652] ------------[ cut here ]------------
| [  281.666889] sysfs group 'bridge' not found for kobject 'br0'
| [  281.667188] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  281.667600] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  281.668467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  281.669038] Workqueue: netns cleanup_net
[  281.669240] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 281.669486] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  281.670419] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  281.670697] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  281.671061] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  281.671432] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  281.671803] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741934610
[  281.672165] R13: ffff9c494005be08 R14: ffff8eb741934b80 R15: ffffffffb5278f90
[  281.672533] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  281.672945] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  281.673241] CR2: 00007f6caeac90e0 CR3: 0000000036660002 CR4: 0000000000770ef0
[  281.673611] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  281.673977] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  281.674339] PKRU: 55555554
[  281.674484] Call Trace:
[  281.674626]  <TASK>
[  281.674744] ? __warn (kernel/panic.c:677) 
[  281.674920] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.675140] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  281.675338] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  281.675536] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  281.675744] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  281.675967] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.676190] br_dev_delete (net/bridge/br_if.c:396) 
[  281.676382] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  281.676621] cleanup_net (net/core/net_namespace.c:630) 
[  281.676817] ? process_one_work (kernel/workqueue.c:2606) 
[  281.677036] process_one_work (kernel/workqueue.c:2633) 
[  281.677250] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  281.677451] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  281.677682] kthread (kernel/kthread.c:388) 
[  281.677853] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.678051] ret_from_fork (arch/x86/kernel/process.c:147) 
[  281.678244] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.678446] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  281.680994] ------------[ cut here ]------------
| [  281.681230] sysfs group 'bridge' not found for kobject 'br0'
| [  281.681545] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  281.681950] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  281.682830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  281.683403] Workqueue: netns cleanup_net
[  281.683611] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 281.683857] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  281.684780] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  281.685044] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  281.685402] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  281.685764] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  281.686120] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7479a2610
[  281.686478] R13: ffff9c494005be08 R14: ffff8eb7479a2b80 R15: ffffffffb5278f90
[  281.686842] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  281.687245] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  281.687540] CR2: 00007f6caeac90e0 CR3: 0000000036660002 CR4: 0000000000770ef0
[  281.687899] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  281.688257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  281.688618] PKRU: 55555554
[  281.688760] Call Trace:
[  281.688890]  <TASK>
[  281.689005] ? __warn (kernel/panic.c:677) 
[  281.689176] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.689390] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  281.689589] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  281.689773] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  281.689973] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  281.690190] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  281.690407] br_dev_delete (net/bridge/br_if.c:396) 
[  281.690601] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  281.690827] cleanup_net (net/core/net_namespace.c:630) 
[  281.691016] ? process_one_work (kernel/workqueue.c:2606) 
[  281.691232] process_one_work (kernel/workqueue.c:2633) 
[  281.691447] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  281.691650] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  281.691872] kthread (kernel/kthread.c:388) 
[  281.692037] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.692233] ret_from_fork (arch/x86/kernel/process.c:147) 
[  281.692420] ? __pfx_kthread (kernel/kthread.c:341) 
[  281.692622] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.605782] ------------[ cut here ]------------
| [  290.606083] sysfs group 'bridge' not found for kobject 'br0'
| [  290.606455] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.606894] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  290.607861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.608473] Workqueue: netns cleanup_net
[  290.608769] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.609036] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  290.609979] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  290.610292] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  290.610697] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  290.611092] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  290.611486] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c88610
[  290.611894] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffff8eb7450c0050
[  290.612295] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  290.612735] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.613049] CR2: 00007f12889d7000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  290.613435] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.613860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.614266] PKRU: 55555554
[  290.614427] Call Trace:
[  290.614597]  <TASK>
[  290.614765] ? __warn (kernel/panic.c:677) 
[  290.614968] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.615208] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  290.615436] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  290.615672] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  290.615902] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  290.616139] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.616393] br_dev_delete (net/bridge/br_if.c:396) 
[  290.616636] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  290.616895] cleanup_net (net/core/net_namespace.c:630) 
[  290.617115] ? process_one_work (kernel/workqueue.c:2606) 
[  290.617365] process_one_work (kernel/workqueue.c:2633) 
[  290.617638] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  290.617872] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  290.618112] kthread (kernel/kthread.c:388) 
[  290.618309] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.618552] ret_from_fork (arch/x86/kernel/process.c:147) 
[  290.618779] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.618991] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.720756] ------------[ cut here ]------------
| [  290.721355] sysfs group 'bridge' not found for kobject 'br0'
| [  290.721980] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.722845] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  290.724695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.726009] Workqueue: netns cleanup_net
[  290.726369] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.726858] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  290.728857] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  290.729419] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  290.730372] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  290.731279] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  290.732139] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca4610
[  290.732697] R13: ffff9c494005be08 R14: ffff8eb744ca4b80 R15: ffff8eb742e42e50
[  290.733173] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  290.733735] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.734342] CR2: 00007f7d3f7b8000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  290.734952] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.735801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.736866] PKRU: 55555554
[  290.737254] Call Trace:
[  290.737573]  <TASK>
[  290.737840] ? __warn (kernel/panic.c:677) 
[  290.738208] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.738659] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  290.739045] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  290.739432] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  290.739855] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  290.740297] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.740745] br_dev_delete (net/bridge/br_if.c:396) 
[  290.741140] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  290.741597] cleanup_net (net/core/net_namespace.c:630) 
[  290.741974] ? process_one_work (kernel/workqueue.c:2606) 
[  290.742447] process_one_work (kernel/workqueue.c:2633) 
[  290.742804] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  290.743195] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  290.743607] kthread (kernel/kthread.c:388) 
[  290.743921] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.744300] ret_from_fork (arch/x86/kernel/process.c:147) 
[  290.744746] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.745161] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.748867] ------------[ cut here ]------------
| [  290.749421] sysfs group 'bridge' not found for kobject 'br0'
| [  290.749841] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.750766] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  290.752789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.753908] Workqueue: netns cleanup_net
[  290.754312] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.754829] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  290.756914] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  290.757581] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  290.758333] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  290.759118] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  290.759728] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741936610
[  290.760331] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb742e42e50
[  290.760985] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  290.761711] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.762248] CR2: 00007f7d3f7b8000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  290.762701] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.763110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.763549] PKRU: 55555554
[  290.763818] Call Trace:
[  290.764015]  <TASK>
[  290.764170] ? __warn (kernel/panic.c:677) 
[  290.764344] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.764577] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  290.764770] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  290.765008] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  290.765359] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  290.765809] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.766267] br_dev_delete (net/bridge/br_if.c:396) 
[  290.766526] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  290.766943] cleanup_net (net/core/net_namespace.c:630) 
[  290.767319] ? process_one_work (kernel/workqueue.c:2606) 
[  290.767589] process_one_work (kernel/workqueue.c:2633) 
[  290.767806] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  290.768174] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  290.768546] kthread (kernel/kthread.c:388) 
[  290.768882] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.769317] ret_from_fork (arch/x86/kernel/process.c:147) 
[  290.769684] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.770095] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  290.890755] ------------[ cut here ]------------
| [  290.891140] sysfs group 'bridge' not found for kobject 'br0'
| [  290.891691] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  290.892482] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  290.894214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  290.895346] Workqueue: netns cleanup_net
[  290.895741] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 290.896208] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  290.897985] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  290.898486] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  290.899204] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  290.899866] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  290.900523] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca2610
[  290.901192] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb74462c550
[  290.901857] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  290.902566] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  290.903116] CR2: 00007febc35b0000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  290.903720] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  290.904107] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  290.904594] PKRU: 55555554
[  290.904740] Call Trace:
[  290.904993]  <TASK>
[  290.905216] ? __warn (kernel/panic.c:677) 
[  290.905387] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.905615] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  290.905841] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  290.906144] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  290.906494] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  290.906813] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  290.907091] br_dev_delete (net/bridge/br_if.c:396) 
[  290.907397] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  290.907868] cleanup_net (net/core/net_namespace.c:630) 
[  290.908263] ? process_one_work (kernel/workqueue.c:2606) 
[  290.908750] process_one_work (kernel/workqueue.c:2633) 
[  290.909159] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  290.909582] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  290.910040] kthread (kernel/kthread.c:388) 
[  290.910381] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.910797] ret_from_fork (arch/x86/kernel/process.c:147) 
[  290.911179] ? __pfx_kthread (kernel/kthread.c:341) 
[  290.911640] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  299.733877] ------------[ cut here ]------------
| [  299.734661] sysfs group 'bridge' not found for kobject 'br0'
| [  299.735590] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  299.736804] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  299.738564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  299.739752] Workqueue: netns cleanup_net
[  299.740199] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 299.740851] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  299.742606] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  299.742992] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  299.743512] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  299.744036] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  299.744563] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c8c610
[  299.745084] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb7418c0050
[  299.745613] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  299.746200] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  299.746631] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  299.747155] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  299.747556] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  299.747922] PKRU: 55555554
[  299.748068] Call Trace:
[  299.748200]  <TASK>
[  299.748315] ? __warn (kernel/panic.c:677) 
[  299.748488] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.748712] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  299.748904] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  299.749082] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  299.749278] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  299.749492] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.749712] br_dev_delete (net/bridge/br_if.c:396) 
[  299.749899] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  299.750120] cleanup_net (net/core/net_namespace.c:630) 
[  299.750305] ? process_one_work (kernel/workqueue.c:2606) 
[  299.750518] process_one_work (kernel/workqueue.c:2633) 
[  299.750730] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  299.750922] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  299.751140] kthread (kernel/kthread.c:388) 
[  299.751304] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.751509] ret_from_fork (arch/x86/kernel/process.c:147) 
[  299.751699] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.751889] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  299.859705] ------------[ cut here ]------------
| [  299.860151] sysfs group 'bridge' not found for kobject 'br0'
| [  299.860725] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  299.861505] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  299.863132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  299.864260] Workqueue: netns cleanup_net
[  299.864652] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 299.865135] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  299.866831] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  299.867340] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  299.867911] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  299.868543] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  299.869183] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7479a6610
[  299.869820] R13: ffff9c494005be08 R14: ffff8eb7479a6b80 R15: ffff8eb74462c550
[  299.870472] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  299.871190] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  299.871768] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  299.872591] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  299.873069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  299.873707] PKRU: 55555554
[  299.874001] Call Trace:
[  299.874179]  <TASK>
[  299.874339] ? __warn (kernel/panic.c:677) 
[  299.874595] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.875042] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  299.875556] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  299.876064] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  299.876552] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  299.877153] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.877707] br_dev_delete (net/bridge/br_if.c:396) 
[  299.878056] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  299.878655] cleanup_net (net/core/net_namespace.c:630) 
[  299.879156] ? process_one_work (kernel/workqueue.c:2606) 
[  299.879793] process_one_work (kernel/workqueue.c:2633) 
[  299.880332] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  299.880698] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  299.881146] kthread (kernel/kthread.c:388) 
[  299.881453] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.882001] ret_from_fork (arch/x86/kernel/process.c:147) 
[  299.882375] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.882785] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  299.888878] ------------[ cut here ]------------
| [  299.889350] sysfs group 'bridge' not found for kobject 'br0'
| [  299.889945] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  299.890469] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  299.892057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  299.893131] Workqueue: netns cleanup_net
[  299.893494] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 299.893980] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  299.895750] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  299.896263] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  299.896916] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  299.897634] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  299.898349] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741c8a610
[  299.898918] R13: ffff9c494005be08 R14: ffff8eb741c8ab80 R15: ffff8eb74462c550
[  299.899540] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  299.900230] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  299.900737] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  299.901365] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  299.901967] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  299.902639] PKRU: 55555554
[  299.902919] Call Trace:
[  299.903108]  <TASK>
[  299.903222] ? __warn (kernel/panic.c:677) 
[  299.903427] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.903703] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  299.903922] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  299.904231] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  299.904577] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  299.904790] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  299.905004] br_dev_delete (net/bridge/br_if.c:396) 
[  299.905312] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  299.905915] cleanup_net (net/core/net_namespace.c:630) 
[  299.906246] ? process_one_work (kernel/workqueue.c:2606) 
[  299.906713] process_one_work (kernel/workqueue.c:2633) 
[  299.907259] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  299.907843] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  299.908575] kthread (kernel/kthread.c:388) 
[  299.909041] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.909594] ret_from_fork (arch/x86/kernel/process.c:147) 
[  299.910129] ? __pfx_kthread (kernel/kthread.c:341) 
[  299.910664] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  300.031691] ------------[ cut here ]------------
| [  300.032142] sysfs group 'bridge' not found for kobject 'br0'
| [  300.032555] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  300.033028] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  300.034216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  300.034800] Workqueue: netns cleanup_net
[  300.035094] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 300.035502] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  300.036830] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  300.037369] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  300.038054] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  300.038734] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  300.039454] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f4610
[  300.040153] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb744629750
[  300.040842] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  300.041624] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  300.042176] CR2: 000055a96b9ea5a0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  300.042839] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  300.043736] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  300.044565] PKRU: 55555554
[  300.044954] Call Trace:
[  300.045279]  <TASK>
[  300.045613] ? __warn (kernel/panic.c:677) 
[  300.046062] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  300.046607] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  300.047073] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  300.047593] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  300.048131] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  300.048475] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  300.048872] br_dev_delete (net/bridge/br_if.c:396) 
[  300.049191] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  300.049538] cleanup_net (net/core/net_namespace.c:630) 
[  300.049816] ? process_one_work (kernel/workqueue.c:2606) 
[  300.050080] process_one_work (kernel/workqueue.c:2633) 
[  300.050288] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  300.050481] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  300.050704] kthread (kernel/kthread.c:388) 
[  300.050895] ? __pfx_kthread (kernel/kthread.c:341) 
[  300.051167] ret_from_fork (arch/x86/kernel/process.c:147) 
[  300.051389] ? __pfx_kthread (kernel/kthread.c:341) 
[  300.051587] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  308.874740] ------------[ cut here ]------------
| [  308.875221] sysfs group 'bridge' not found for kobject 'br0'
| [  308.875794] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  308.876571] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  308.878138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  308.879082] Workqueue: netns cleanup_net
[  308.879464] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 308.879853] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  308.881029] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  308.881432] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  308.881900] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  308.882438] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  308.882805] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744636610
[  308.883254] R13: ffff9c494005be08 R14: ffff8eb744636b80 R15: ffff8eb742e42e50
[  308.883798] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  308.884344] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  308.884805] CR2: 00007fbf8a83fd40 CR3: 0000000002d96002 CR4: 0000000000770ef0
[  308.885405] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  308.886042] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  308.886694] PKRU: 55555554
[  308.886957] Call Trace:
[  308.887188]  <TASK>
[  308.887399] ? __warn (kernel/panic.c:677) 
[  308.887707] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  308.888075] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  308.888409] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  308.888780] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  308.889157] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  308.889577] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  308.889988] br_dev_delete (net/bridge/br_if.c:396) 
[  308.890366] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  308.890791] cleanup_net (net/core/net_namespace.c:630) 
[  308.891130] ? process_one_work (kernel/workqueue.c:2606) 
[  308.891568] process_one_work (kernel/workqueue.c:2633) 
[  308.891927] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  308.892249] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  308.892653] kthread (kernel/kthread.c:388) 
[  308.892956] ? __pfx_kthread (kernel/kthread.c:341) 
[  308.893327] ret_from_fork (arch/x86/kernel/process.c:147) 
[  308.893698] ? __pfx_kthread (kernel/kthread.c:341) 
[  308.894028] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  308.988750] ------------[ cut here ]------------
| [  308.989197] sysfs group 'bridge' not found for kobject 'br0'
| [  308.989822] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  308.990625] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  308.992477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  308.993716] Workqueue: netns cleanup_net
[  308.994127] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 308.994587] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  308.996498] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  308.997011] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  308.997670] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  308.998351] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  308.999022] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d0610
[  308.999670] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffff8eb744629750
[  309.000274] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  309.000769] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  309.001075] CR2: 00007fbf8a83fd40 CR3: 0000000036660002 CR4: 0000000000770ef0
[  309.001494] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  309.002048] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  309.002407] PKRU: 55555554
[  309.002555] Call Trace:
[  309.002687]  <TASK>
[  309.002804] ? __warn (kernel/panic.c:677) 
[  309.002989] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.003344] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  309.003686] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  309.003997] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  309.004207] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  309.004595] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.004988] br_dev_delete (net/bridge/br_if.c:396) 
[  309.005427] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  309.005891] cleanup_net (net/core/net_namespace.c:630) 
[  309.006285] ? process_one_work (kernel/workqueue.c:2606) 
[  309.006742] process_one_work (kernel/workqueue.c:2633) 
[  309.007213] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  309.007655] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  309.008131] kthread (kernel/kthread.c:388) 
[  309.008501] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.008938] ret_from_fork (arch/x86/kernel/process.c:147) 
[  309.009323] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.009762] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  309.014711] ------------[ cut here ]------------
| [  309.015194] sysfs group 'bridge' not found for kobject 'br0'
| [  309.015500] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  309.016006] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  309.017096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  309.017814] Workqueue: netns cleanup_net
[  309.018176] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 309.018628] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  309.020138] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  309.020556] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  309.020998] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  309.021586] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  309.022202] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d6610
[  309.022851] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb744629750
[  309.023485] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  309.024227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  309.024757] CR2: 00007fbf8a83fd40 CR3: 0000000036660002 CR4: 0000000000770ef0
[  309.025420] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  309.026078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  309.026750] PKRU: 55555554
[  309.027019] Call Trace:
[  309.027265]  <TASK>
[  309.027477] ? __warn (kernel/panic.c:677) 
[  309.027811] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.028208] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  309.028557] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  309.028899] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  309.029279] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  309.029682] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.030027] br_dev_delete (net/bridge/br_if.c:396) 
[  309.030368] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  309.030721] cleanup_net (net/core/net_namespace.c:630) 
[  309.030914] ? process_one_work (kernel/workqueue.c:2606) 
[  309.031146] process_one_work (kernel/workqueue.c:2633) 
[  309.031492] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  309.031701] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  309.031921] kthread (kernel/kthread.c:388) 
[  309.032089] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.032284] ret_from_fork (arch/x86/kernel/process.c:147) 
[  309.032471] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.032757] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  309.160734] ------------[ cut here ]------------
| [  309.161220] sysfs group 'bridge' not found for kobject 'br0'
| [  309.161755] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  309.162246] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  309.163383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  309.164129] Workqueue: netns cleanup_net
[  309.164338] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 309.164710] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  309.166160] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  309.166737] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  309.167502] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  309.168272] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  309.169059] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741932610
[  309.169891] R13: ffff9c494005be08 R14: ffff8eb741932b80 R15: ffff8eb7450c1750
[  309.170729] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  309.171665] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  309.172331] CR2: 00007fbf8a83fd40 CR3: 0000000036660002 CR4: 0000000000770ef0
[  309.173056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  309.173807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  309.174523] PKRU: 55555554
[  309.174810] Call Trace:
[  309.175096]  <TASK>
[  309.175268] ? __warn (kernel/panic.c:677) 
[  309.175632] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.176053] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  309.176400] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  309.176593] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  309.176816] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  309.177084] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  309.177358] br_dev_delete (net/bridge/br_if.c:396) 
[  309.177560] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  309.177798] cleanup_net (net/core/net_namespace.c:630) 
[  309.177994] ? process_one_work (kernel/workqueue.c:2606) 
[  309.178214] process_one_work (kernel/workqueue.c:2633) 
[  309.178429] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  309.178635] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  309.178869] kthread (kernel/kthread.c:388) 
[  309.179036] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.179238] ret_from_fork (arch/x86/kernel/process.c:147) 
[  309.179431] ? __pfx_kthread (kernel/kthread.c:341) 
[  309.179639] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  318.085763] ------------[ cut here ]------------
| [  318.086273] sysfs group 'bridge' not found for kobject 'br0'
| [  318.086887] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  318.087764] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  318.089387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  318.090437] Workqueue: netns cleanup_net
[  318.090817] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 318.091337] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  318.092971] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  318.093239] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  318.093679] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  318.094037] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  318.094407] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d0610
[  318.094778] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffff8eb7450c2e50
[  318.095137] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  318.095559] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  318.095861] CR2: 00007f6caecc8a30 CR3: 0000000002d96005 CR4: 0000000000770ef0
[  318.096228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  318.096598] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  318.096965] PKRU: 55555554
[  318.097112] Call Trace:
[  318.097249]  <TASK>
[  318.097366] ? __warn (kernel/panic.c:677) 
[  318.097551] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.097772] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  318.097973] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  318.098164] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  318.098370] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  318.098606] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.098827] br_dev_delete (net/bridge/br_if.c:396) 
[  318.099022] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  318.099265] cleanup_net (net/core/net_namespace.c:630) 
[  318.099460] ? process_one_work (kernel/workqueue.c:2606) 
[  318.099688] process_one_work (kernel/workqueue.c:2633) 
[  318.099904] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  318.100110] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  318.100336] kthread (kernel/kthread.c:388) 
[  318.100506] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.100723] ret_from_fork (arch/x86/kernel/process.c:147) 
[  318.100915] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.101109] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  318.206756] ------------[ cut here ]------------
| [  318.207301] sysfs group 'bridge' not found for kobject 'br0'
| [  318.207849] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  318.208613] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  318.210039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  318.210771] Workqueue: netns cleanup_net
[  318.210979] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 318.211563] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  318.212556] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  318.212971] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  318.213652] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  318.214173] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  318.214855] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744636610
[  318.215375] R13: ffff9c494005be08 R14: ffff8eb744636b80 R15: ffff8eb7450c1750
[  318.215939] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  318.216739] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  318.217272] CR2: 00007f6caecc8a30 CR3: 0000000036660005 CR4: 0000000000770ef0
[  318.217934] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  318.218694] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  318.219348] PKRU: 55555554
[  318.219625] Call Trace:
[  318.219901]  <TASK>
[  318.220161] ? __warn (kernel/panic.c:677) 
[  318.220488] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.220903] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  318.221293] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  318.221678] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  318.222066] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  318.222469] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.222901] br_dev_delete (net/bridge/br_if.c:396) 
[  318.223256] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  318.223716] cleanup_net (net/core/net_namespace.c:630) 
[  318.224062] ? process_one_work (kernel/workqueue.c:2606) 
[  318.224384] process_one_work (kernel/workqueue.c:2633) 
[  318.224611] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  318.224862] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  318.225220] kthread (kernel/kthread.c:388) 
[  318.225390] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.225606] ret_from_fork (arch/x86/kernel/process.c:147) 
[  318.225799] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.225998] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  318.230543] ------------[ cut here ]------------
| [  318.231068] sysfs group 'bridge' not found for kobject 'br0'
| [  318.231674] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  318.232520] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  318.234158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  318.235153] Workqueue: netns cleanup_net
[  318.235534] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 318.235966] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  318.237500] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  318.237976] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  318.238577] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  318.239192] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  318.239566] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d6610
[  318.239999] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb7450c1750
[  318.240512] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  318.240939] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  318.241408] CR2: 00007f88a0d11000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  318.241913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  318.242379] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  318.242834] PKRU: 55555554
[  318.243044] Call Trace:
[  318.243240]  <TASK>
[  318.243435] ? __warn (kernel/panic.c:677) 
[  318.243715] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.244073] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  318.244392] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  318.244724] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  318.245037] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  318.245414] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.245783] br_dev_delete (net/bridge/br_if.c:396) 
[  318.246091] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  318.246458] cleanup_net (net/core/net_namespace.c:630) 
[  318.246751] ? process_one_work (kernel/workqueue.c:2606) 
[  318.247083] process_one_work (kernel/workqueue.c:2633) 
[  318.247430] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  318.247756] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  318.248121] kthread (kernel/kthread.c:388) 
[  318.248385] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.248721] ret_from_fork (arch/x86/kernel/process.c:147) 
[  318.249028] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.249343] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  318.360812] ------------[ cut here ]------------
| [  318.361413] sysfs group 'bridge' not found for kobject 'br0'
| [  318.362146] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  318.363151] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  318.364361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  318.364948] Workqueue: netns cleanup_net
[  318.365158] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 318.365480] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  318.366868] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  318.367264] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  318.367862] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  318.368466] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  318.369053] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744630610
[  318.369640] R13: ffff9c494005be08 R14: ffff8eb744630b80 R15: ffff8eb74462c550
[  318.370239] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  318.370902] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  318.371382] CR2: 00007f88a0d11000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  318.371971] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  318.372576] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  318.373135] PKRU: 55555554
[  318.373372] Call Trace:
[  318.373595]  <TASK>
[  318.373785] ? __warn (kernel/panic.c:677) 
[  318.374065] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.374377] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  318.374759] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  318.375040] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  318.375325] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  318.375685] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  318.376023] br_dev_delete (net/bridge/br_if.c:396) 
[  318.376312] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  318.376691] cleanup_net (net/core/net_namespace.c:630) 
[  318.376980] ? process_one_work (kernel/workqueue.c:2606) 
[  318.377292] process_one_work (kernel/workqueue.c:2633) 
[  318.377657] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  318.377976] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  318.378300] kthread (kernel/kthread.c:388) 
[  318.378470] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.378684] ret_from_fork (arch/x86/kernel/process.c:147) 
[  318.378876] ? __pfx_kthread (kernel/kthread.c:341) 
[  318.379125] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  327.263754] ------------[ cut here ]------------
| [  327.264205] sysfs group 'bridge' not found for kobject 'br0'
| [  327.264796] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  327.265541] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  327.267318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  327.268457] Workqueue: netns cleanup_net
[  327.268833] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 327.269320] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  327.270489] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  327.270849] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  327.271501] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  327.271894] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  327.272442] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741932610
[  327.273104] R13: ffff9c494005be08 R14: ffff8eb741932b80 R15: ffff8eb74462dc50
[  327.273548] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  327.274255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  327.274816] CR2: 00007f0c9ef6e000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  327.275513] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  327.276189] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  327.276835] PKRU: 55555554
[  327.277082] Call Trace:
[  327.277347]  <TASK>
[  327.277601] ? __warn (kernel/panic.c:677) 
[  327.277934] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.278341] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  327.278765] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  327.279109] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  327.279546] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  327.279952] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.280471] br_dev_delete (net/bridge/br_if.c:396) 
[  327.280861] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  327.281263] cleanup_net (net/core/net_namespace.c:630) 
[  327.281611] ? process_one_work (kernel/workqueue.c:2606) 
[  327.281977] process_one_work (kernel/workqueue.c:2633) 
[  327.282426] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  327.282846] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  327.283259] kthread (kernel/kthread.c:388) 
[  327.283608] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.283960] ret_from_fork (arch/x86/kernel/process.c:147) 
[  327.284348] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.284752] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  327.400737] ------------[ cut here ]------------
| [  327.401018] sysfs group 'bridge' not found for kobject 'br0'
| [  327.401386] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  327.402047] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  327.403007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  327.404135] Workqueue: netns cleanup_net
[  327.404441] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 327.404944] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  327.406614] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  327.407231] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  327.408076] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  327.408888] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  327.409754] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d2610
[  327.410613] R13: ffff9c494005be08 R14: ffff8eb7445d2b80 R15: ffff8eb74462c550
[  327.411501] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  327.412346] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  327.412948] CR2: 00007f0c9ef6e000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  327.413324] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  327.413791] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  327.414150] PKRU: 55555554
[  327.414298] Call Trace:
[  327.414434]  <TASK>
[  327.414569] ? __warn (kernel/panic.c:677) 
[  327.414812] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.415111] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  327.415445] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  327.415799] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  327.416016] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  327.416316] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.416697] br_dev_delete (net/bridge/br_if.c:396) 
[  327.417048] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  327.417482] cleanup_net (net/core/net_namespace.c:630) 
[  327.417850] ? process_one_work (kernel/workqueue.c:2606) 
[  327.418247] process_one_work (kernel/workqueue.c:2633) 
[  327.418668] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  327.419046] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  327.419473] kthread (kernel/kthread.c:388) 
[  327.419799] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.420179] ret_from_fork (arch/x86/kernel/process.c:147) 
[  327.420537] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.420897] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  327.425519] ------------[ cut here ]------------
| [  327.425926] sysfs group 'bridge' not found for kobject 'br0'
| [  327.426484] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  327.427192] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  327.428770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  327.429747] Workqueue: netns cleanup_net
[  327.430184] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 327.430465] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  327.431642] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  327.431978] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  327.432336] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  327.432924] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  327.433462] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744caa610
[  327.433947] R13: ffff9c494005be08 R14: ffff8eb744caab80 R15: ffff8eb74462c550
[  327.434653] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  327.435506] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  327.436123] CR2: 00007f0c9ef6e000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  327.436873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  327.437641] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  327.438445] PKRU: 55555554
[  327.438739] Call Trace:
[  327.439015]  <TASK>
[  327.439253] ? __warn (kernel/panic.c:677) 
[  327.439635] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.440085] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  327.440482] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  327.440872] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  327.441258] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  327.441627] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.442047] br_dev_delete (net/bridge/br_if.c:396) 
[  327.442366] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  327.442803] cleanup_net (net/core/net_namespace.c:630) 
[  327.443097] ? process_one_work (kernel/workqueue.c:2606) 
[  327.443507] process_one_work (kernel/workqueue.c:2633) 
[  327.443858] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  327.444264] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  327.444662] kthread (kernel/kthread.c:388) 
[  327.444917] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.445301] ret_from_fork (arch/x86/kernel/process.c:147) 
[  327.445625] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.445990] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  327.557752] ------------[ cut here ]------------
| [  327.558232] sysfs group 'bridge' not found for kobject 'br0'
| [  327.558857] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  327.559589] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  327.561207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  327.562235] Workqueue: netns cleanup_net
[  327.562569] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 327.562992] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  327.564351] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  327.564694] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  327.565101] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  327.565680] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  327.566036] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f0610
[  327.566468] R13: ffff9c494005be08 R14: ffff8eb7421f0b80 R15: ffff8eb742e40050
[  327.567057] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  327.567572] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  327.568047] CR2: 00007f0c9ef6e000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  327.568688] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  327.569343] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  327.570046] PKRU: 55555554
[  327.570323] Call Trace:
[  327.570581]  <TASK>
[  327.570815] ? __warn (kernel/panic.c:677) 
[  327.571221] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.571675] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  327.572065] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  327.572465] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  327.572869] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  327.573350] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  327.573791] br_dev_delete (net/bridge/br_if.c:396) 
[  327.574182] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  327.574635] cleanup_net (net/core/net_namespace.c:630) 
[  327.575019] ? process_one_work (kernel/workqueue.c:2606) 
[  327.575499] process_one_work (kernel/workqueue.c:2633) 
[  327.575890] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  327.576247] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  327.576719] kthread (kernel/kthread.c:388) 
[  327.577073] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.577519] ret_from_fork (arch/x86/kernel/process.c:147) 
[  327.577898] ? __pfx_kthread (kernel/kthread.c:341) 
[  327.578364] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  336.540864] ------------[ cut here ]------------
| [  336.541269] sysfs group 'bridge' not found for kobject 'br0'
| [  336.541588] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  336.542065] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  336.543217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  336.543805] Workqueue: netns cleanup_net
[  336.544013] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 336.544346] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  336.546220] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  336.546913] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  336.547809] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  336.548689] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  336.549582] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744caa610
[  336.550455] R13: ffff9c494005be08 R14: ffff8eb744caab80 R15: ffff8eb74462dc50
[  336.551356] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  336.552289] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  336.552971] CR2: 00007ffd0044cb98 CR3: 0000000036660006 CR4: 0000000000770ef0
[  336.553857] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  336.554657] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  336.555200] PKRU: 55555554
[  336.555353] Call Trace:
[  336.555493]  <TASK>
[  336.555644] ? __warn (kernel/panic.c:677) 
[  336.555828] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.556044] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  336.556240] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  336.556424] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  336.556636] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  336.556863] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.557082] br_dev_delete (net/bridge/br_if.c:396) 
[  336.557274] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  336.557502] cleanup_net (net/core/net_namespace.c:630) 
[  336.557708] ? process_one_work (kernel/workqueue.c:2606) 
[  336.557927] process_one_work (kernel/workqueue.c:2633) 
[  336.558136] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  336.558336] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  336.558564] kthread (kernel/kthread.c:388) 
[  336.558740] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.558936] ret_from_fork (arch/x86/kernel/process.c:147) 
[  336.559127] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.559321] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  336.666756] ------------[ cut here ]------------
| [  336.667187] sysfs group 'bridge' not found for kobject 'br0'
| [  336.667760] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  336.668550] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  336.670249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  336.671017] Workqueue: netns cleanup_net
[  336.671303] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 336.671639] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  336.672780] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  336.673245] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  336.673935] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  336.674434] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  336.675049] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca0610
[  336.675418] R13: ffff9c494005be08 R14: ffff8eb744ca0b80 R15: ffff8eb742e40050
[  336.676083] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  336.676801] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  336.677352] CR2: 00007ffd0044cb98 CR3: 0000000036660006 CR4: 0000000000770ef0
[  336.678064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  336.678792] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  336.679462] PKRU: 55555554
[  336.679741] Call Trace:
[  336.679989]  <TASK>
[  336.680246] ? __warn (kernel/panic.c:677) 
[  336.680579] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.680973] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  336.681272] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  336.681637] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  336.682034] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  336.682437] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.682875] br_dev_delete (net/bridge/br_if.c:396) 
[  336.683104] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  336.683332] cleanup_net (net/core/net_namespace.c:630) 
[  336.683595] ? process_one_work (kernel/workqueue.c:2606) 
[  336.683813] process_one_work (kernel/workqueue.c:2633) 
[  336.684033] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  336.684240] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  336.684463] kthread (kernel/kthread.c:388) 
[  336.684699] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.684998] ret_from_fork (arch/x86/kernel/process.c:147) 
[  336.685275] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.685469] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  336.691284] ------------[ cut here ]------------
| [  336.691877] sysfs group 'bridge' not found for kobject 'br0'
| [  336.692580] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  336.693552] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  336.695442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  336.696333] Workqueue: netns cleanup_net
[  336.696738] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 336.697029] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  336.698286] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  336.698622] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  336.699173] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  336.699948] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  336.700663] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744cac610
[  336.701479] R13: ffff9c494005be08 R14: ffff8eb744cacb80 R15: ffff8eb742e40050
[  336.702070] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  336.702797] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  336.703282] CR2: 00007ffd0044cb98 CR3: 0000000036660006 CR4: 0000000000770ef0
[  336.704014] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  336.704884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  336.705735] PKRU: 55555554
[  336.706059] Call Trace:
[  336.706335]  <TASK>
[  336.706603] ? __warn (kernel/panic.c:677) 
[  336.707006] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.707469] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  336.707911] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  336.708376] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  336.708837] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  336.709228] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.709579] br_dev_delete (net/bridge/br_if.c:396) 
[  336.709937] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  336.710283] cleanup_net (net/core/net_namespace.c:630) 
[  336.710581] ? process_one_work (kernel/workqueue.c:2606) 
[  336.710907] process_one_work (kernel/workqueue.c:2633) 
[  336.711237] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  336.711545] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  336.711882] kthread (kernel/kthread.c:388) 
[  336.712122] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.712401] ret_from_fork (arch/x86/kernel/process.c:147) 
[  336.712686] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.712973] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  336.834808] ------------[ cut here ]------------
| [  336.835075] sysfs group 'bridge' not found for kobject 'br0'
| [  336.835602] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  336.836169] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  336.837822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  336.838947] Workqueue: netns cleanup_net
[  336.839309] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 336.839865] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  336.841588] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  336.842021] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  336.842746] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  336.843302] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  336.844013] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744ca4610
[  336.844609] R13: ffff9c494005be08 R14: ffff8eb744ca4b80 R15: ffff8eb7418c5c50
[  336.845303] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  336.845919] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  336.846267] CR2: 00007f2999b46000 CR3: 0000000036660001 CR4: 0000000000770ef0
[  336.846854] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  336.847223] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  336.847586] PKRU: 55555554
[  336.847730] Call Trace:
[  336.847886]  <TASK>
[  336.848062] ? __warn (kernel/panic.c:677) 
[  336.848298] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.848516] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  336.848719] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  336.848904] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  336.849118] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  336.849374] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  336.849684] br_dev_delete (net/bridge/br_if.c:396) 
[  336.849877] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  336.850119] cleanup_net (net/core/net_namespace.c:630) 
[  336.850310] ? process_one_work (kernel/workqueue.c:2606) 
[  336.850526] process_one_work (kernel/workqueue.c:2633) 
[  336.850810] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  336.851058] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  336.851302] kthread (kernel/kthread.c:388) 
[  336.851471] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.851675] ret_from_fork (arch/x86/kernel/process.c:147) 
[  336.851864] ? __pfx_kthread (kernel/kthread.c:341) 
[  336.852095] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.614970] ------------[ cut here ]------------
| [  345.615234] sysfs group 'bridge' not found for kobject 'br0'
| [  345.615556] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.616149] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  345.617177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.617992] Workqueue: netns cleanup_net
[  345.618437] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.618708] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  345.620260] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  345.620734] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  345.621621] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  345.622587] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  345.623500] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741934610
[  345.624442] R13: ffff9c494005be08 R14: ffff8eb741934b80 R15: ffff8eb744629750
[  345.625377] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  345.626439] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.627191] CR2: 00007f7cef32d270 CR3: 0000000036660002 CR4: 0000000000770ef0
[  345.628115] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.628937] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.629790] PKRU: 55555554
[  345.630093] Call Trace:
[  345.630406]  <TASK>
[  345.630702] ? __warn (kernel/panic.c:677) 
[  345.631055] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.631585] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  345.632030] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  345.632302] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  345.632630] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  345.632982] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.633234] br_dev_delete (net/bridge/br_if.c:396) 
[  345.633425] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  345.633671] cleanup_net (net/core/net_namespace.c:630) 
[  345.633867] ? process_one_work (kernel/workqueue.c:2606) 
[  345.634086] process_one_work (kernel/workqueue.c:2633) 
[  345.634295] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  345.634490] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  345.634729] kthread (kernel/kthread.c:388) 
[  345.634898] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.635094] ret_from_fork (arch/x86/kernel/process.c:147) 
[  345.635283] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.635478] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.735755] ------------[ cut here ]------------
| [  345.736096] sysfs group 'bridge' not found for kobject 'br0'
| [  345.736484] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.736909] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  345.738076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.738793] Workqueue: netns cleanup_net
[  345.739128] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.739508] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  345.741000] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  345.741442] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  345.742019] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  345.742614] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  345.743195] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f6610
[  345.743768] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb7418c5c50
[  345.744347] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  345.744995] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.745485] CR2: 00007f7cef32c000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  345.746104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.746817] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.747583] PKRU: 55555554
[  345.747870] Call Trace:
[  345.748163]  <TASK>
[  345.748380] ? __warn (kernel/panic.c:677) 
[  345.748789] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.749197] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  345.749650] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  345.750080] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  345.750428] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  345.750788] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.751157] br_dev_delete (net/bridge/br_if.c:396) 
[  345.751550] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  345.751928] cleanup_net (net/core/net_namespace.c:630) 
[  345.752209] ? process_one_work (kernel/workqueue.c:2606) 
[  345.752549] process_one_work (kernel/workqueue.c:2633) 
[  345.752966] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  345.753523] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  345.754023] kthread (kernel/kthread.c:388) 
[  345.754419] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.754857] ret_from_fork (arch/x86/kernel/process.c:147) 
[  345.755210] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.755694] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.761005] ------------[ cut here ]------------
| [  345.761388] sysfs group 'bridge' not found for kobject 'br0'
| [  345.761814] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.762296] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  345.763245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.764080] Workqueue: netns cleanup_net
[  345.764287] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.764618] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  345.766069] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  345.766535] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  345.767132] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  345.767738] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  345.768337] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb744cac610
[  345.768914] R13: ffff9c494005be08 R14: ffff8eb744cacb80 R15: ffff8eb7418c5c50
[  345.769464] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  345.770134] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.770629] CR2: 00007f7cef32c000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  345.771299] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.772117] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.772913] PKRU: 55555554
[  345.773206] Call Trace:
[  345.773552]  <TASK>
[  345.773809] ? __warn (kernel/panic.c:677) 
[  345.774230] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.774730] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  345.775125] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  345.775553] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  345.776009] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  345.776415] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.776764] br_dev_delete (net/bridge/br_if.c:396) 
[  345.777083] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  345.777553] cleanup_net (net/core/net_namespace.c:630) 
[  345.777862] ? process_one_work (kernel/workqueue.c:2606) 
[  345.778182] process_one_work (kernel/workqueue.c:2633) 
[  345.778655] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  345.779080] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  345.779524] kthread (kernel/kthread.c:388) 
[  345.779931] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.780409] ret_from_fork (arch/x86/kernel/process.c:147) 
[  345.780948] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.781483] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  345.905772] ------------[ cut here ]------------
| [  345.906042] sysfs group 'bridge' not found for kobject 'br0'
| [  345.906380] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  345.906828] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  345.907741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  345.908336] Workqueue: netns cleanup_net
[  345.908584] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 345.908855] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  345.909792] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  345.910086] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  345.910482] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  345.910881] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  345.911264] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7421f4610
[  345.911661] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb742e40050
[  345.912057] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  345.912488] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.912796] CR2: 00007fbe84fae000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  345.913184] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  345.913584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  345.913966] PKRU: 55555554
[  345.914125] Call Trace:
[  345.914282]  <TASK>
[  345.914431] ? __warn (kernel/panic.c:677) 
[  345.914641] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.914881] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  345.915123] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  345.915390] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  345.915644] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  345.915894] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  345.916166] br_dev_delete (net/bridge/br_if.c:396) 
[  345.916406] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  345.916683] cleanup_net (net/core/net_namespace.c:630) 
[  345.916918] ? process_one_work (kernel/workqueue.c:2606) 
[  345.917162] process_one_work (kernel/workqueue.c:2633) 
[  345.917424] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  345.917674] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  345.917968] kthread (kernel/kthread.c:388) 
[  345.918175] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.918416] ret_from_fork (arch/x86/kernel/process.c:147) 
[  345.918671] ? __pfx_kthread (kernel/kthread.c:341) 
[  345.918911] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  354.752802] ------------[ cut here ]------------
| [  354.753271] sysfs group 'bridge' not found for kobject 'br0'
| [  354.753850] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  354.754619] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  354.756129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  354.757071] Workqueue: netns cleanup_net
[  354.757423] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 354.757836] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  354.759396] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  354.759877] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  354.760487] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  354.761140] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  354.761577] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7479a4610
[  354.761954] R13: ffff9c494005be08 R14: ffff8eb7479a4b80 R15: ffff8eb742e45c50
[  354.762446] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  354.762937] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  354.763313] CR2: 00007f4f79022000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  354.763753] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  354.764469] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  354.764989] PKRU: 55555554
[  354.765285] Call Trace:
[  354.765574]  <TASK>
[  354.765856] ? __warn (kernel/panic.c:677) 
[  354.766281] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.766827] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  354.767316] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  354.767729] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  354.768252] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  354.768793] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.769287] br_dev_delete (net/bridge/br_if.c:396) 
[  354.769727] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  354.770256] cleanup_net (net/core/net_namespace.c:630) 
[  354.770715] ? process_one_work (kernel/workqueue.c:2606) 
[  354.771131] process_one_work (kernel/workqueue.c:2633) 
[  354.771483] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  354.771779] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  354.772185] kthread (kernel/kthread.c:388) 
[  354.772466] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.772787] ret_from_fork (arch/x86/kernel/process.c:147) 
[  354.773145] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.773575] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  354.903753] ------------[ cut here ]------------
| [  354.904078] sysfs group 'bridge' not found for kobject 'br0'
| [  354.904410] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  354.904873] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  354.905930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  354.906688] Workqueue: netns cleanup_net
[  354.906896] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 354.907262] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  354.908837] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  354.909295] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  354.909899] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  354.910494] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  354.911105] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7479a6610
[  354.911690] R13: ffff9c494005be08 R14: ffff8eb7479a6b80 R15: ffffffffb5278f90
[  354.912309] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  354.913022] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  354.913553] CR2: 00007f0cb6240000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  354.914095] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  354.914674] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  354.915261] PKRU: 55555554
[  354.915497] Call Trace:
[  354.915730]  <TASK>
[  354.915868] ? __warn (kernel/panic.c:677) 
[  354.916161] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.916459] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  354.916771] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  354.917054] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  354.917380] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  354.917685] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.917904] br_dev_delete (net/bridge/br_if.c:396) 
[  354.918095] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  354.918344] cleanup_net (net/core/net_namespace.c:630) 
[  354.918565] ? process_one_work (kernel/workqueue.c:2606) 
[  354.918837] process_one_work (kernel/workqueue.c:2633) 
[  354.919048] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  354.919244] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  354.919468] kthread (kernel/kthread.c:388) 
[  354.919643] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.919839] ret_from_fork (arch/x86/kernel/process.c:147) 
[  354.920029] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.920223] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  354.922768] ------------[ cut here ]------------
| [  354.923028] sysfs group 'bridge' not found for kobject 'br0'
| [  354.923340] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  354.923781] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  354.925023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  354.925905] Workqueue: netns cleanup_net
[  354.926222] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 354.926613] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  354.928049] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  354.928421] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  354.928810] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  354.929225] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  354.929613] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb7445d0610
[  354.929984] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffffffffb5278f90
[  354.930372] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  354.930817] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  354.931147] CR2: 000055a96ba3cdec CR3: 000000000444c004 CR4: 0000000000770ef0
[  354.931546] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  354.931935] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  354.932295] PKRU: 55555554
[  354.932438] Call Trace:
[  354.932578]  <TASK>
[  354.932694] ? __warn (kernel/panic.c:677) 
[  354.932868] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.933086] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  354.933282] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  354.933467] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  354.933675] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  354.933895] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.934115] br_dev_delete (net/bridge/br_if.c:396) 
[  354.934308] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  354.934553] cleanup_net (net/core/net_namespace.c:630) 
[  354.934746] ? process_one_work (kernel/workqueue.c:2606) 
[  354.934975] process_one_work (kernel/workqueue.c:2633) 
[  354.935222] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  354.935432] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  354.935686] kthread (kernel/kthread.c:388) 
[  354.935867] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.936079] ret_from_fork (arch/x86/kernel/process.c:147) 
[  354.936271] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.936478] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  354.939080] ------------[ cut here ]------------
| [  354.939319] sysfs group 'bridge' not found for kobject 'br0'
| [  354.939633] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  354.940043] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  354.940983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  354.941620] Workqueue: netns cleanup_net
[  354.941847] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 354.942115] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  354.943117] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  354.943407] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffdfff
[  354.943794] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  354.944194] RBP: 0000000000000000 R08: ffffffffb3d78508 R09: 00000000ffffdfff
[  354.944590] R10: ffffffffb3c98520 R11: ffffffffb3d48520 R12: ffff8eb741d46610
[  354.944980] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffffffffb5278f90
[  354.945359] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  354.945807] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  354.946120] CR2: 000055a96ba3cdec CR3: 000000000444c004 CR4: 0000000000770ef0
[  354.946509] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  354.946900] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  354.947262] PKRU: 55555554
[  354.947405] Call Trace:
[  354.947544]  <TASK>
[  354.947668] ? __warn (kernel/panic.c:677) 
[  354.947856] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.948096] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  354.948305] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  354.948498] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  354.948720] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  354.948965] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  354.949185] br_dev_delete (net/bridge/br_if.c:396) 
[  354.949377] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  354.949615] cleanup_net (net/core/net_namespace.c:630) 
[  354.949808] ? process_one_work (kernel/workqueue.c:2606) 
[  354.950025] process_one_work (kernel/workqueue.c:2633) 
[  354.950236] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  354.950436] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  354.950678] kthread (kernel/kthread.c:388) 
[  354.950855] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.951075] ret_from_fork (arch/x86/kernel/process.c:147) 
[  354.951284] ? __pfx_kthread (kernel/kthread.c:341) 
[  354.951499] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  362.859806] ------------[ cut here ]------------
| [  362.860208] sysfs group 'bridge' not found for kobject 'br0'
| [  362.860723] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  362.861467] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  362.863074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  362.864146] Workqueue: netns cleanup_net
[  362.864553] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 362.865072] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  362.866882] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  362.867410] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe011
[  362.868120] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  362.868749] RBP: 0000000000000000 R08: ffffffffb3d486b8 R09: 00000000ffffe011
[  362.869441] R10: ffffffffb3c98520 R11: ffffffffb3d486b8 R12: ffff8eb7447a0610
[  362.870062] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffff8eb742e42e50
[  362.870805] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  362.871224] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  362.871590] CR2: 00007f38a7513000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  362.872127] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  362.872651] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  362.873058] PKRU: 55555554
[  362.873204] Call Trace:
[  362.873338]  <TASK>
[  362.873479] ? __warn (kernel/panic.c:677) 
[  362.873780] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  362.874210] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  362.874419] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  362.874681] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  362.875015] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  362.875408] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  362.875841] br_dev_delete (net/bridge/br_if.c:396) 
[  362.876177] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  362.876620] cleanup_net (net/core/net_namespace.c:630) 
[  362.876953] ? process_one_work (kernel/workqueue.c:2606) 
[  362.877351] process_one_work (kernel/workqueue.c:2633) 
[  362.877733] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  362.878085] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  362.878469] kthread (kernel/kthread.c:388) 
[  362.878758] ? __pfx_kthread (kernel/kthread.c:341) 
[  362.879097] ret_from_fork (arch/x86/kernel/process.c:147) 
[  362.879422] ? __pfx_kthread (kernel/kthread.c:341) 
[  362.879745] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  363.020829] ------------[ cut here ]------------
| [  363.021429] sysfs group 'bridge' not found for kobject 'br0'
| [  363.022149] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  363.023163] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  363.025256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  363.026489] Workqueue: netns cleanup_net
[  363.026945] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 363.027511] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  363.029202] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  363.029487] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe04b
[  363.029933] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  363.030292] RBP: 0000000000000000 R08: ffffffffb3d48c28 R09: 00000000ffffe04b
[  363.030664] R10: ffffffffb3c98520 R11: ffffffffb3d48c28 R12: ffff8eb742702610
[  363.031037] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffffffffb5278f90
[  363.031397] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  363.031838] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  363.032141] CR2: 00007f44c45e8000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  363.032499] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  363.032872] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  363.033232] PKRU: 55555554
[  363.033374] Call Trace:
[  363.033508]  <TASK>
[  363.033633] ? __warn (kernel/panic.c:677) 
[  363.033812] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.034031] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  363.034228] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  363.034414] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  363.034623] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  363.034851] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.035072] br_dev_delete (net/bridge/br_if.c:396) 
[  363.035273] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  363.035503] cleanup_net (net/core/net_namespace.c:630) 
[  363.035731] ? process_one_work (kernel/workqueue.c:2606) 
[  363.036013] process_one_work (kernel/workqueue.c:2633) 
[  363.036323] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  363.036632] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  363.036956] kthread (kernel/kthread.c:388) 
[  363.037207] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.037502] ret_from_fork (arch/x86/kernel/process.c:147) 
[  363.037793] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.038089] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  363.041902] ------------[ cut here ]------------
| [  363.042175] sysfs group 'bridge' not found for kobject 'br0'
| [  363.042491] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  363.042915] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  363.043810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  363.044385] Workqueue: netns cleanup_net
[  363.044613] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 363.044864] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  363.045816] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  363.046085] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe07c
[  363.046453] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  363.046834] RBP: 0000000000000000 R08: ffffffffb3d490c0 R09: 00000000ffffe07c
[  363.047203] R10: ffffffffb3c98520 R11: ffffffffb3d490c0 R12: ffff8eb742700610
[  363.047585] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffffffffb5278f90
[  363.047958] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  363.048375] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  363.048682] CR2: 000055a96ba3cdec CR3: 000000000444c003 CR4: 0000000000770ef0
[  363.049060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  363.049437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  363.049812] PKRU: 55555554
[  363.049963] Call Trace:
[  363.050095]  <TASK>
[  363.050220] ? __warn (kernel/panic.c:677) 
[  363.050398] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.050628] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  363.050827] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  363.051026] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  363.051228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  363.051456] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.051683] br_dev_delete (net/bridge/br_if.c:396) 
[  363.051875] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  363.052113] cleanup_net (net/core/net_namespace.c:630) 
[  363.052306] ? process_one_work (kernel/workqueue.c:2606) 
[  363.052524] process_one_work (kernel/workqueue.c:2633) 
[  363.052753] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  363.052950] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  363.053174] kthread (kernel/kthread.c:388) 
[  363.053342] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.053546] ret_from_fork (arch/x86/kernel/process.c:147) 
[  363.053739] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.053935] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  363.056506] ------------[ cut here ]------------
| [  363.056756] sysfs group 'bridge' not found for kobject 'br0'
| [  363.057089] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  363.057538] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  363.058470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  363.059101] Workqueue: netns cleanup_net
[  363.059336] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 363.059612] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  363.060591] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  363.060874] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe0ad
[  363.061452] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  363.061825] RBP: 0000000000000000 R08: ffffffffb3d49558 R09: 00000000ffffe0ad
[  363.062186] R10: ffffffffb3c98520 R11: ffffffffb3d49558 R12: ffff8eb7445d4610
[  363.062552] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffffffffb5278f90
[  363.062913] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  363.063324] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  363.063624] CR2: 000055a96ba3cdec CR3: 000000000444c003 CR4: 0000000000770ef0
[  363.063990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  363.064349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  363.064715] PKRU: 55555554
[  363.064861] Call Trace:
[  363.064993]  <TASK>
[  363.065110] ? __warn (kernel/panic.c:677) 
[  363.065284] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.065515] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  363.065720] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  363.065906] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  363.066106] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  363.066327] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  363.066568] br_dev_delete (net/bridge/br_if.c:396) 
[  363.066761] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  363.066994] cleanup_net (net/core/net_namespace.c:630) 
[  363.067186] ? process_one_work (kernel/workqueue.c:2606) 
[  363.067405] process_one_work (kernel/workqueue.c:2633) 
[  363.067623] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  363.067823] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  363.068044] kthread (kernel/kthread.c:388) 
[  363.068213] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.068409] ret_from_fork (arch/x86/kernel/process.c:147) 
[  363.068609] ? __pfx_kthread (kernel/kthread.c:341) 
[  363.068812] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  371.222845] ------------[ cut here ]------------
| [  371.223731] sysfs group 'bridge' not found for kobject 'br0'
| [  371.224708] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  371.225977] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  371.228218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  371.229491] Workqueue: netns cleanup_net
[  371.230051] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 371.230649] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  371.232356] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  371.232979] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe0fb
[  371.233505] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  371.234309] RBP: 0000000000000000 R08: ffffffffb3d49ca8 R09: 00000000ffffe0fb
[  371.234957] R10: ffffffffb3c98520 R11: ffffffffb3d49ca8 R12: ffff8eb744ca6610
[  371.235788] R13: ffff9c494005be08 R14: ffff8eb744ca6b80 R15: ffff8eb7450c1750
[  371.236737] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  371.237773] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  371.238301] CR2: 00007f267013a000 CR3: 0000000002d96004 CR4: 0000000000770ef0
[  371.238947] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  371.239612] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  371.240231] PKRU: 55555554
[  371.240491] Call Trace:
[  371.240749]  <TASK>
[  371.240959] ? __warn (kernel/panic.c:677) 
[  371.241287] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.241727] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  371.242080] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  371.242405] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  371.242755] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  371.243145] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.243546] br_dev_delete (net/bridge/br_if.c:396) 
[  371.243884] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  371.244304] cleanup_net (net/core/net_namespace.c:630) 
[  371.244651] ? process_one_work (kernel/workqueue.c:2606) 
[  371.245146] process_one_work (kernel/workqueue.c:2633) 
[  371.245464] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  371.245881] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  371.246316] kthread (kernel/kthread.c:388) 
[  371.246613] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.246945] ret_from_fork (arch/x86/kernel/process.c:147) 
[  371.247347] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.247705] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  371.363840] ------------[ cut here ]------------
| [  371.364558] sysfs group 'bridge' not found for kobject 'br0'
| [  371.365337] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  371.366029] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  371.367577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  371.368856] Workqueue: netns cleanup_net
[  371.369156] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 371.369684] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  371.371601] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  371.372327] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe132
[  371.373339] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  371.374298] RBP: 0000000000000000 R08: ffffffffb3d4a1d0 R09: 00000000ffffe132
[  371.375248] R10: ffffffffb3c98520 R11: ffffffffb3d4a1d0 R12: ffff8eb7447a0610
[  371.376223] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffff8eb74462ae50
[  371.377157] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  371.378268] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  371.378722] CR2: 00007f267013a000 CR3: 0000000002d96004 CR4: 0000000000770ef0
[  371.379351] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  371.379962] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  371.380545] PKRU: 55555554
[  371.380785] Call Trace:
[  371.381061]  <TASK>
[  371.381225] ? __warn (kernel/panic.c:677) 
[  371.381556] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.381916] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  371.382204] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  371.382485] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  371.382830] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  371.383149] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.383552] br_dev_delete (net/bridge/br_if.c:396) 
[  371.383855] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  371.384114] cleanup_net (net/core/net_namespace.c:630) 
[  371.384306] ? process_one_work (kernel/workqueue.c:2606) 
[  371.384536] process_one_work (kernel/workqueue.c:2633) 
[  371.384792] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  371.385018] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  371.385269] kthread (kernel/kthread.c:388) 
[  371.385497] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.385839] ret_from_fork (arch/x86/kernel/process.c:147) 
[  371.386093] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.386288] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  371.390260] ------------[ cut here ]------------
| [  371.390937] sysfs group 'bridge' not found for kobject 'br0'
| [  371.391815] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  371.393030] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  371.395536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  371.397207] Workqueue: netns cleanup_net
[  371.397803] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 371.398513] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  371.400254] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  371.400536] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe163
[  371.401063] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  371.401449] RBP: 0000000000000000 R08: ffffffffb3d4a668 R09: 00000000ffffe163
[  371.401891] R10: ffffffffb3c98520 R11: ffffffffb3d4a668 R12: ffff8eb7479a2610
[  371.402427] R13: ffff9c494005be08 R14: ffff8eb7479a2b80 R15: ffff8eb74462ae50
[  371.403171] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  371.403958] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  371.404806] CR2: 00007ffd0044b8e8 CR3: 0000000036660005 CR4: 0000000000770ef0
[  371.405889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  371.406897] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  371.407940] PKRU: 55555554
[  371.408367] Call Trace:
[  371.408764]  <TASK>
[  371.409092] ? __warn (kernel/panic.c:677) 
[  371.409622] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.410280] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  371.410834] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  371.411305] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  371.411816] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  371.412408] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.412953] br_dev_delete (net/bridge/br_if.c:396) 
[  371.413445] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  371.414047] cleanup_net (net/core/net_namespace.c:630) 
[  371.414563] ? process_one_work (kernel/workqueue.c:2606) 
[  371.415128] process_one_work (kernel/workqueue.c:2633) 
[  371.415705] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  371.416075] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  371.416298] kthread (kernel/kthread.c:388) 
[  371.416499] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.416783] ret_from_fork (arch/x86/kernel/process.c:147) 
[  371.416989] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.417395] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  371.559833] ------------[ cut here ]------------
| [  371.560413] sysfs group 'bridge' not found for kobject 'br0'
| [  371.560838] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  371.561402] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  371.562325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  371.562909] Workqueue: netns cleanup_net
[  371.563120] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 371.563368] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  371.564298] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  371.564584] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe197
[  371.564944] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  371.565300] RBP: 0000000000000000 R08: ffffffffb3d4ab48 R09: 00000000ffffe197
[  371.565672] R10: ffffffffb3c98520 R11: ffffffffb3d4ab48 R12: ffff8eb7421f4610
[  371.566031] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb7418c2e50
[  371.566393] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  371.566812] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  371.567106] CR2: 00007ffd0044b8e8 CR3: 0000000036660005 CR4: 0000000000770ef0
[  371.567468] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  371.567840] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  371.568199] PKRU: 55555554
[  371.568341] Call Trace:
[  371.568474]  <TASK>
[  371.568608] ? __warn (kernel/panic.c:677) 
[  371.568783] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.568999] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  371.569195] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  371.569382] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  371.569598] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  371.569822] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  371.570042] br_dev_delete (net/bridge/br_if.c:396) 
[  371.570233] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  371.570464] cleanup_net (net/core/net_namespace.c:630) 
[  371.570670] ? process_one_work (kernel/workqueue.c:2606) 
[  371.570893] process_one_work (kernel/workqueue.c:2633) 
[  371.571115] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  371.571313] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  371.571551] kthread (kernel/kthread.c:388) 
[  371.571722] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.571921] ret_from_fork (arch/x86/kernel/process.c:147) 
[  371.572114] ? __pfx_kthread (kernel/kthread.c:341) 
[  371.572311] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  379.609766] ------------[ cut here ]------------
| [  379.610338] sysfs group 'bridge' not found for kobject 'br0'
| [  379.611002] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  379.611839] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  379.613540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  379.614646] Workqueue: netns cleanup_net
[  379.615031] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 379.615410] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  379.616535] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  379.616941] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe1e5
[  379.617332] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  379.617700] RBP: 0000000000000000 R08: ffffffffb3d4b298 R09: 00000000ffffe1e5
[  379.618157] R10: ffffffffb3c98520 R11: ffffffffb3d4b298 R12: ffff8eb744ca0610
[  379.618728] R13: ffff9c494005be08 R14: ffff8eb744ca0b80 R15: ffff8eb7418c4550
[  379.619089] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  379.619656] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  379.620125] CR2: 00007f5891549000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  379.620764] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  379.621354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  379.621978] PKRU: 55555554
[  379.622199] Call Trace:
[  379.622433]  <TASK>
[  379.622628] ? __warn (kernel/panic.c:677) 
[  379.622934] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.623290] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  379.623623] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  379.623954] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  379.624298] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  379.624668] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.625046] br_dev_delete (net/bridge/br_if.c:396) 
[  379.625385] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  379.625763] cleanup_net (net/core/net_namespace.c:630) 
[  379.626060] ? process_one_work (kernel/workqueue.c:2606) 
[  379.626413] process_one_work (kernel/workqueue.c:2633) 
[  379.626752] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  379.627030] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  379.627379] kthread (kernel/kthread.c:388) 
[  379.627620] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.627941] ret_from_fork (arch/x86/kernel/process.c:147) 
[  379.628214] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.628579] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  379.745730] ------------[ cut here ]------------
| [  379.746045] sysfs group 'bridge' not found for kobject 'br0'
| [  379.746546] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  379.747477] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  379.749406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  379.750549] Workqueue: netns cleanup_net
[  379.751003] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 379.751496] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  379.753062] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  379.753405] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe21c
[  379.753771] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  379.754160] RBP: 0000000000000000 R08: ffffffffb3d4b7c0 R09: 00000000ffffe21c
[  379.754619] R10: ffffffffb3c98520 R11: ffffffffb3d4b7c0 R12: ffff8eb7421f6610
[  379.755238] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb7418c2e50
[  379.755649] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  379.756314] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  379.756867] CR2: 00007f5891549000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  379.757557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  379.758219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  379.758873] PKRU: 55555554
[  379.759147] Call Trace:
[  379.759365]  <TASK>
[  379.759582] ? __warn (kernel/panic.c:677) 
[  379.759918] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.760321] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  379.760670] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  379.761011] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  379.761333] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  379.761701] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.762082] br_dev_delete (net/bridge/br_if.c:396) 
[  379.762372] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  379.762726] cleanup_net (net/core/net_namespace.c:630) 
[  379.763033] ? process_one_work (kernel/workqueue.c:2606) 
[  379.763382] process_one_work (kernel/workqueue.c:2633) 
[  379.763718] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  379.764000] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  379.764333] kthread (kernel/kthread.c:388) 
[  379.764587] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.764859] ret_from_fork (arch/x86/kernel/process.c:147) 
[  379.765134] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.765452] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  379.768948] ------------[ cut here ]------------
| [  379.769195] sysfs group 'bridge' not found for kobject 'br0'
| [  379.769553] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  379.770133] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  379.771142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  379.771941] Workqueue: netns cleanup_net
[  379.772175] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 379.772504] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  379.774052] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  379.774554] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe24d
[  379.775221] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  379.775827] RBP: 0000000000000000 R08: ffffffffb3d4bc58 R09: 00000000ffffe24d
[  379.776492] R10: ffffffffb3c98520 R11: ffffffffb3d4bc58 R12: ffff8eb742706610
[  379.777200] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffff8eb7418c2e50
[  379.777920] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  379.778649] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  379.779201] CR2: 00007f5891549000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  379.779811] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  379.780516] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  379.781158] PKRU: 55555554
[  379.781426] Call Trace:
[  379.781646]  <TASK>
[  379.781846] ? __warn (kernel/panic.c:677) 
[  379.782175] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.782565] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  379.782901] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  379.783191] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  379.783538] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  379.783863] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.784244] br_dev_delete (net/bridge/br_if.c:396) 
[  379.784564] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  379.784908] cleanup_net (net/core/net_namespace.c:630) 
[  379.785111] ? process_one_work (kernel/workqueue.c:2606) 
[  379.785370] process_one_work (kernel/workqueue.c:2633) 
[  379.785691] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  379.785929] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  379.786168] kthread (kernel/kthread.c:388) 
[  379.786350] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.786568] ret_from_fork (arch/x86/kernel/process.c:147) 
[  379.786770] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.786982] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  379.894771] ------------[ cut here ]------------
| [  379.895201] sysfs group 'bridge' not found for kobject 'br0'
| [  379.895750] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  379.896474] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  379.897516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  379.898135] Workqueue: netns cleanup_net
[  379.898354] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 379.898796] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  379.900353] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  379.900976] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe281
[  379.901871] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  379.902783] RBP: 0000000000000000 R08: ffffffffb3d4c138 R09: 00000000ffffe281
[  379.903736] R10: ffffffffb3c98520 R11: ffffffffb3d4c138 R12: ffff8eb744ca2610
[  379.904656] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb74462dc50
[  379.905457] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  379.906262] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  379.906839] CR2: 00007f5891549000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  379.907459] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  379.908057] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  379.908596] PKRU: 55555554
[  379.908740] Call Trace:
[  379.908873]  <TASK>
[  379.909021] ? __warn (kernel/panic.c:677) 
[  379.909226] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.909468] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  379.909721] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  379.909907] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  379.910206] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  379.910626] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  379.910913] br_dev_delete (net/bridge/br_if.c:396) 
[  379.911129] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  379.911479] cleanup_net (net/core/net_namespace.c:630) 
[  379.911835] ? process_one_work (kernel/workqueue.c:2606) 
[  379.912180] process_one_work (kernel/workqueue.c:2633) 
[  379.912406] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  379.912750] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  379.913192] kthread (kernel/kthread.c:388) 
[  379.913497] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.913876] ret_from_fork (arch/x86/kernel/process.c:147) 
[  379.914281] ? __pfx_kthread (kernel/kthread.c:341) 
[  379.914633] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  387.954824] ------------[ cut here ]------------
| [  387.955447] sysfs group 'bridge' not found for kobject 'br0'
| [  387.956148] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  387.957110] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  387.959054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  387.960030] Workqueue: netns cleanup_net
[  387.960398] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 387.960909] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  387.962489] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  387.962769] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe2d0
[  387.963312] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  387.963925] RBP: 0000000000000000 R08: ffffffffb3d4c8a0 R09: 00000000ffffe2d0
[  387.964620] R10: ffffffffb3c98520 R11: ffffffffb3d4c8a0 R12: ffff8eb742704610
[  387.965280] R13: ffff9c494005be08 R14: ffff8eb742704b80 R15: ffff8eb742e44550
[  387.965962] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  387.966716] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  387.967264] CR2: 00007f02f6cdfd40 CR3: 0000000002d96006 CR4: 0000000000770ef0
[  387.967943] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  387.968622] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  387.969237] PKRU: 55555554
[  387.969477] Call Trace:
[  387.969704]  <TASK>
[  387.969876] ? __warn (kernel/panic.c:677) 
[  387.970163] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  387.970541] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  387.970842] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  387.971192] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  387.971485] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  387.971900] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  387.972265] br_dev_delete (net/bridge/br_if.c:396) 
[  387.972520] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  387.972775] cleanup_net (net/core/net_namespace.c:630) 
[  387.972990] ? process_one_work (kernel/workqueue.c:2606) 
[  387.973227] process_one_work (kernel/workqueue.c:2633) 
[  387.973440] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  387.973646] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  387.973878] kthread (kernel/kthread.c:388) 
[  387.974066] ? __pfx_kthread (kernel/kthread.c:341) 
[  387.974319] ret_from_fork (arch/x86/kernel/process.c:147) 
[  387.974611] ? __pfx_kthread (kernel/kthread.c:341) 
[  387.974880] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  388.085860] ------------[ cut here ]------------
| [  388.086133] sysfs group 'bridge' not found for kobject 'br0'
| [  388.086440] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  388.086862] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  388.087843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  388.088860] Workqueue: netns cleanup_net
[  388.089215] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 388.089687] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  388.091054] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  388.091373] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe307
[  388.091737] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  388.092333] RBP: 0000000000000000 R08: ffffffffb3d4cdc8 R09: 00000000ffffe307
[  388.092696] R10: ffffffffb3c98520 R11: ffffffffb3d4cdc8 R12: ffff8eb741d46610
[  388.093052] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffff8eb74462dc50
[  388.093544] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  388.094318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  388.094865] CR2: 00007f418c22b2a8 CR3: 0000000036660001 CR4: 0000000000770ef0
[  388.095536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  388.096044] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  388.096615] PKRU: 55555554
[  388.096902] Call Trace:
[  388.097154]  <TASK>
[  388.097376] ? __warn (kernel/panic.c:677) 
[  388.097717] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.098174] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  388.098599] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  388.098917] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  388.099319] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  388.099731] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.100209] br_dev_delete (net/bridge/br_if.c:396) 
[  388.100576] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  388.101049] cleanup_net (net/core/net_namespace.c:630) 
[  388.101445] ? process_one_work (kernel/workqueue.c:2606) 
[  388.101893] process_one_work (kernel/workqueue.c:2633) 
[  388.102313] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  388.102730] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  388.103253] kthread (kernel/kthread.c:388) 
[  388.103578] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.103982] ret_from_fork (arch/x86/kernel/process.c:147) 
[  388.104290] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.104485] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  388.107545] ------------[ cut here ]------------
| [  388.107909] sysfs group 'bridge' not found for kobject 'br0'
| [  388.108427] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  388.109301] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  388.111767] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  388.113651] Workqueue: netns cleanup_net
[  388.114286] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 388.115072] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  388.117885] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  388.118591] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe338
[  388.119275] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  388.119875] RBP: 0000000000000000 R08: ffffffffb3d4d260 R09: 00000000ffffe338
[  388.120568] R10: ffffffffb3c98520 R11: ffffffffb3d4d260 R12: ffff8eb7421bc610
[  388.121075] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb74462dc50
[  388.121464] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  388.121947] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  388.122299] CR2: 00007f418c22b2a8 CR3: 0000000036660001 CR4: 0000000000770ef0
[  388.122864] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  388.123219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  388.123686] PKRU: 55555554
[  388.123950] Call Trace:
[  388.124178]  <TASK>
[  388.124389] ? __warn (kernel/panic.c:677) 
[  388.124568] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.124858] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  388.125151] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  388.125488] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  388.125890] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  388.126313] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.126769] br_dev_delete (net/bridge/br_if.c:396) 
[  388.127143] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  388.127594] cleanup_net (net/core/net_namespace.c:630) 
[  388.127936] ? process_one_work (kernel/workqueue.c:2606) 
[  388.128358] process_one_work (kernel/workqueue.c:2633) 
[  388.128791] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  388.129141] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  388.129586] kthread (kernel/kthread.c:388) 
[  388.129906] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.130292] ret_from_fork (arch/x86/kernel/process.c:147) 
[  388.130676] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.131155] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  388.254716] ------------[ cut here ]------------
| [  388.255245] sysfs group 'bridge' not found for kobject 'br0'
| [  388.255888] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  388.256724] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  388.258750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  388.259944] Workqueue: netns cleanup_net
[  388.260151] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 388.260445] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  388.261876] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  388.262144] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe36c
[  388.262639] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  388.263438] RBP: 0000000000000000 R08: ffffffffb3d4d740 R09: 00000000ffffe36c
[  388.263859] R10: ffffffffb3c98520 R11: ffffffffb3d4d740 R12: ffff8eb742706610
[  388.264559] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffff8eb742e41750
[  388.265453] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  388.266507] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  388.267453] CR2: 00007f418c22b2a8 CR3: 0000000036660001 CR4: 0000000000770ef0
[  388.268485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  388.269445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  388.270223] PKRU: 55555554
[  388.270484] Call Trace:
[  388.270805]  <TASK>
[  388.271058] ? __warn (kernel/panic.c:677) 
[  388.271480] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.272065] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  388.272443] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  388.272933] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  388.273469] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  388.274046] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  388.274598] br_dev_delete (net/bridge/br_if.c:396) 
[  388.275043] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  388.275592] cleanup_net (net/core/net_namespace.c:630) 
[  388.276039] ? process_one_work (kernel/workqueue.c:2606) 
[  388.276652] process_one_work (kernel/workqueue.c:2633) 
[  388.277116] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  388.277617] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  388.278052] kthread (kernel/kthread.c:388) 
[  388.278282] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.278583] ret_from_fork (arch/x86/kernel/process.c:147) 
[  388.278976] ? __pfx_kthread (kernel/kthread.c:341) 
[  388.279184] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  396.318732] ------------[ cut here ]------------
| [  396.319204] sysfs group 'bridge' not found for kobject 'br0'
| [  396.319776] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  396.320236] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  396.321400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  396.322254] Workqueue: netns cleanup_net
[  396.322460] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 396.322738] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  396.324173] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  396.324612] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe3ba
[  396.325335] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  396.326108] RBP: 0000000000000000 R08: ffffffffb3d4de90 R09: 00000000ffffe3ba
[  396.326797] R10: ffffffffb3c98520 R11: ffffffffb3d4de90 R12: ffff8eb7421f4610
[  396.327561] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb7418c2e50
[  396.328256] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  396.329090] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  396.329746] CR2: 00007f8334b8d000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  396.330464] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  396.331319] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  396.332097] PKRU: 55555554
[  396.332417] Call Trace:
[  396.332740]  <TASK>
[  396.332984] ? __warn (kernel/panic.c:677) 
[  396.333386] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.333871] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  396.334272] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  396.334719] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  396.335127] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  396.335633] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.336217] br_dev_delete (net/bridge/br_if.c:396) 
[  396.336633] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  396.337126] cleanup_net (net/core/net_namespace.c:630) 
[  396.337554] ? process_one_work (kernel/workqueue.c:2606) 
[  396.337978] process_one_work (kernel/workqueue.c:2633) 
[  396.338361] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  396.338741] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  396.339128] kthread (kernel/kthread.c:388) 
[  396.339428] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.339786] ret_from_fork (arch/x86/kernel/process.c:147) 
[  396.340145] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.340341] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  396.434739] ------------[ cut here ]------------
| [  396.435136] sysfs group 'bridge' not found for kobject 'br0'
| [  396.435699] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  396.436176] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  396.437827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  396.438943] Workqueue: netns cleanup_net
[  396.439345] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 396.439882] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  396.441835] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  396.442427] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe3f1
[  396.443202] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  396.443996] RBP: 0000000000000000 R08: ffffffffb3d4e3b8 R09: 00000000ffffe3f1
[  396.444646] R10: ffffffffb3c98520 R11: ffffffffb3d4e3b8 R12: ffff8eb742ec2610
[  396.445324] R13: ffff9c494005be08 R14: ffff8eb742ec2b80 R15: ffff8eb742e41750
[  396.446050] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  396.446852] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  396.447430] CR2: 00007f8334b8d000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  396.448167] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  396.448743] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  396.449133] PKRU: 55555554
[  396.449345] Call Trace:
[  396.449479]  <TASK>
[  396.449706] ? __warn (kernel/panic.c:677) 
[  396.449997] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.450215] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  396.450410] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  396.450602] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  396.450819] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  396.451208] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.451584] br_dev_delete (net/bridge/br_if.c:396) 
[  396.451894] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  396.452143] cleanup_net (net/core/net_namespace.c:630) 
[  396.452454] ? process_one_work (kernel/workqueue.c:2606) 
[  396.452823] process_one_work (kernel/workqueue.c:2633) 
[  396.453201] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  396.453559] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  396.454002] kthread (kernel/kthread.c:388) 
[  396.454326] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.454713] ret_from_fork (arch/x86/kernel/process.c:147) 
[  396.455072] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.455441] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  396.460262] ------------[ cut here ]------------
| [  396.460712] sysfs group 'bridge' not found for kobject 'br0'
| [  396.461326] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  396.462039] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  396.463578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  396.464525] Workqueue: netns cleanup_net
[  396.464920] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 396.465322] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  396.466586] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  396.466921] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe422
[  396.467541] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  396.467906] RBP: 0000000000000000 R08: ffffffffb3d4e850 R09: 00000000ffffe422
[  396.468261] R10: ffffffffb3c98520 R11: ffffffffb3d4e850 R12: ffff8eb741936610
[  396.468827] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb742e41750
[  396.469523] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  396.470212] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  396.470753] CR2: 00007f8334b8d000 CR3: 0000000002d96001 CR4: 0000000000770ef0
[  396.471274] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  396.471773] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  396.472487] PKRU: 55555554
[  396.472789] Call Trace:
[  396.473088]  <TASK>
[  396.473325] ? __warn (kernel/panic.c:677) 
[  396.473708] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.474124] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  396.474545] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  396.474941] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  396.475375] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  396.475846] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.476318] br_dev_delete (net/bridge/br_if.c:396) 
[  396.476721] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  396.477227] cleanup_net (net/core/net_namespace.c:630) 
[  396.477632] ? process_one_work (kernel/workqueue.c:2606) 
[  396.478105] process_one_work (kernel/workqueue.c:2633) 
[  396.478554] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  396.478955] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  396.479332] kthread (kernel/kthread.c:388) 
[  396.479507] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.479712] ret_from_fork (arch/x86/kernel/process.c:147) 
[  396.479964] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.480159] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  396.607746] ------------[ cut here ]------------
| [  396.608202] sysfs group 'bridge' not found for kobject 'br0'
| [  396.608854] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  396.609644] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  396.611363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  396.612452] Workqueue: netns cleanup_net
[  396.612834] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 396.613326] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  396.615046] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  396.615574] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe456
[  396.616275] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  396.616889] RBP: 0000000000000000 R08: ffffffffb3d4ed30 R09: 00000000ffffe456
[  396.617539] R10: ffffffffb3c98520 R11: ffffffffb3d4ed30 R12: ffff8eb742ec4610
[  396.618182] R13: ffff9c494005be08 R14: ffff8eb742ec4b80 R15: ffff8eb742e45c50
[  396.618836] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  396.619573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  396.620029] CR2: 00007f8334b8d000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  396.620667] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  396.621314] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  396.621681] PKRU: 55555554
[  396.621870] Call Trace:
[  396.622027]  <TASK>
[  396.622208] ? __warn (kernel/panic.c:677) 
[  396.622425] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.622671] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  396.622884] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  396.623073] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  396.623280] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  396.623513] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  396.623754] br_dev_delete (net/bridge/br_if.c:396) 
[  396.623960] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  396.624202] cleanup_net (net/core/net_namespace.c:630) 
[  396.624409] ? process_one_work (kernel/workqueue.c:2606) 
[  396.624642] process_one_work (kernel/workqueue.c:2633) 
[  396.624875] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  396.625080] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  396.625320] kthread (kernel/kthread.c:388) 
[  396.625503] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.625721] ret_from_fork (arch/x86/kernel/process.c:147) 
[  396.625922] ? __pfx_kthread (kernel/kthread.c:341) 
[  396.626135] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  404.716407] ------------[ cut here ]------------
| [  404.716805] sysfs group 'bridge' not found for kobject 'br0'
| [  404.717310] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  404.717989] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  404.719380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  404.720334] Workqueue: netns cleanup_net
[  404.720678] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.721104] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  404.722556] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  404.723013] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe4a4
[  404.723611] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  404.724230] RBP: 0000000000000000 R08: ffffffffb3d4f480 R09: 00000000ffffe4a4
[  404.724830] R10: ffffffffb3c98520 R11: ffffffffb3d4f480 R12: ffff8eb7447a6610
[  404.725416] R13: ffff9c494005be08 R14: ffff8eb7447a6b80 R15: ffff8eb742e40050
[  404.726011] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  404.726726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  404.727202] CR2: 00007f428245a000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  404.727797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  404.728405] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  404.729014] PKRU: 55555554
[  404.729279] Call Trace:
[  404.729511]  <TASK>
[  404.729716] ? __warn (kernel/panic.c:677) 
[  404.730009] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.730385] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  404.730727] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  404.731033] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  404.731368] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  404.731756] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.732121] br_dev_delete (net/bridge/br_if.c:396) 
[  404.732434] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  404.732836] cleanup_net (net/core/net_namespace.c:630) 
[  404.733171] ? process_one_work (kernel/workqueue.c:2606) 
[  404.733538] process_one_work (kernel/workqueue.c:2633) 
[  404.733879] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  404.734212] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  404.734599] kthread (kernel/kthread.c:388) 
[  404.734883] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.735202] ret_from_fork (arch/x86/kernel/process.c:147) 
[  404.735523] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.735878] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  404.864755] ------------[ cut here ]------------
| [  404.865145] sysfs group 'bridge' not found for kobject 'br0'
| [  404.865652] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  404.866159] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  404.867769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  404.868940] Workqueue: netns cleanup_net
[  404.869319] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.869785] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  404.871736] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  404.872320] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe4db
[  404.873125] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  404.873885] RBP: 0000000000000000 R08: ffffffffb3d4f9a8 R09: 00000000ffffe4db
[  404.874634] R10: ffffffffb3c98520 R11: ffffffffb3d4f9a8 R12: ffff8eb7421f6610
[  404.875267] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb742e45c50
[  404.875880] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  404.876570] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  404.877155] CR2: 00007fdedae5d000 CR3: 0000000002d96003 CR4: 0000000000770ef0
[  404.877861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  404.878510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  404.879156] PKRU: 55555554
[  404.879419] Call Trace:
[  404.879618]  <TASK>
[  404.879838] ? __warn (kernel/panic.c:677) 
[  404.880178] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.880428] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  404.880643] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  404.880869] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  404.881098] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  404.881367] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.881712] br_dev_delete (net/bridge/br_if.c:396) 
[  404.881999] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  404.882229] cleanup_net (net/core/net_namespace.c:630) 
[  404.882434] ? process_one_work (kernel/workqueue.c:2606) 
[  404.882661] process_one_work (kernel/workqueue.c:2633) 
[  404.882871] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  404.883169] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  404.883571] kthread (kernel/kthread.c:388) 
[  404.883890] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.884241] ret_from_fork (arch/x86/kernel/process.c:147) 
[  404.884544] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.884859] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  404.889551] ------------[ cut here ]------------
| [  404.890034] sysfs group 'bridge' not found for kobject 'br0'
| [  404.890651] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  404.891475] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  404.893326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  404.894534] Workqueue: netns cleanup_net
[  404.894751] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.895154] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  404.896128] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  404.896412] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe50c
[  404.896965] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  404.897616] RBP: 0000000000000000 R08: ffffffffb3d4fe40 R09: 00000000ffffe50c
[  404.898193] R10: ffffffffb3c98520 R11: ffffffffb3d4fe40 R12: ffff8eb7447a0610
[  404.898695] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffff8eb742e45c50
[  404.899416] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  404.900287] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  404.900916] CR2: 00007fdedae5d000 CR3: 0000000002d96003 CR4: 0000000000770ef0
[  404.901696] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  404.902504] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  404.903201] PKRU: 55555554
[  404.903481] Call Trace:
[  404.903720]  <TASK>
[  404.903960] ? __warn (kernel/panic.c:677) 
[  404.904386] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.904890] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  404.905304] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  404.905706] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  404.906079] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  404.906587] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  404.907054] br_dev_delete (net/bridge/br_if.c:396) 
[  404.907482] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  404.907973] cleanup_net (net/core/net_namespace.c:630) 
[  404.908386] ? process_one_work (kernel/workqueue.c:2606) 
[  404.908877] process_one_work (kernel/workqueue.c:2633) 
[  404.909293] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  404.909720] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  404.910120] kthread (kernel/kthread.c:388) 
[  404.910498] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.910908] ret_from_fork (arch/x86/kernel/process.c:147) 
[  404.911306] ? __pfx_kthread (kernel/kthread.c:341) 
[  404.911711] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  405.051720] ------------[ cut here ]------------
| [  405.051980] sysfs group 'bridge' not found for kobject 'br0'
| [  405.052313] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  405.052750] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  405.053716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  405.054326] Workqueue: netns cleanup_net
[  405.054574] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 405.054846] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  405.055817] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  405.056122] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe540
[  405.056554] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  405.056980] RBP: 0000000000000000 R08: ffffffffb3d50320 R09: 00000000ffffe540
[  405.057403] R10: ffffffffb3c98520 R11: ffffffffb3d50320 R12: ffff8eb741c88610
[  405.057870] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffff8eb7450c2e50
[  405.058296] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  405.058792] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  405.059129] CR2: 00007f43b3d14000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  405.059537] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  405.059986] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  405.060381] PKRU: 55555554
[  405.060618] Call Trace:
[  405.060786]  <TASK>
[  405.060942] ? __warn (kernel/panic.c:677) 
[  405.061163] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  405.061417] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  405.061662] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  405.061883] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  405.062109] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  405.062369] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  405.062663] br_dev_delete (net/bridge/br_if.c:396) 
[  405.062888] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  405.063160] cleanup_net (net/core/net_namespace.c:630) 
[  405.063393] ? process_one_work (kernel/workqueue.c:2606) 
[  405.063655] process_one_work (kernel/workqueue.c:2633) 
[  405.063911] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  405.064133] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  405.064397] kthread (kernel/kthread.c:388) 
[  405.064627] ? __pfx_kthread (kernel/kthread.c:341) 
[  405.064861] ret_from_fork (arch/x86/kernel/process.c:147) 
[  405.065070] ? __pfx_kthread (kernel/kthread.c:341) 
[  405.065313] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  413.377756] ------------[ cut here ]------------
| [  413.378204] sysfs group 'bridge' not found for kobject 'br0'
| [  413.378758] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  413.379504] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  413.381308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  413.381981] Workqueue: netns cleanup_net
[  413.382221] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 413.382575] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  413.383837] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  413.384121] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe58e
[  413.384594] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  413.385240] RBP: 0000000000000000 R08: ffffffffb3d50a70 R09: 00000000ffffe58e
[  413.385660] R10: ffffffffb3c98520 R11: ffffffffb3d50a70 R12: ffff8eb744ca2610
[  413.386339] R13: ffff9c494005be08 R14: ffff8eb744ca2b80 R15: ffff8eb7450c0050
[  413.387146] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  413.387988] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  413.388716] CR2: 00007fbaaa8fbd40 CR3: 0000000002d96005 CR4: 0000000000770ef0
[  413.389909] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  413.391077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  413.392077] PKRU: 55555554
[  413.392470] Call Trace:
[  413.392812]  <TASK>
[  413.393105] ? __warn (kernel/panic.c:677) 
[  413.393540] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.394084] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  413.394601] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  413.395112] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  413.395606] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  413.396149] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.396560] br_dev_delete (net/bridge/br_if.c:396) 
[  413.396865] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  413.397235] cleanup_net (net/core/net_namespace.c:630) 
[  413.397537] ? process_one_work (kernel/workqueue.c:2606) 
[  413.397866] process_one_work (kernel/workqueue.c:2633) 
[  413.398182] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  413.398476] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  413.398805] kthread (kernel/kthread.c:388) 
[  413.399046] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.399327] ret_from_fork (arch/x86/kernel/process.c:147) 
[  413.399577] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.399783] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  413.505771] ------------[ cut here ]------------
| [  413.506331] sysfs group 'bridge' not found for kobject 'br0'
| [  413.506969] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  413.507953] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  413.509813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  413.511260] Workqueue: netns cleanup_net
[  413.511725] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 413.512143] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  413.513906] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  413.514363] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe5c5
[  413.514964] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  413.515604] RBP: 0000000000000000 R08: ffffffffb3d50f98 R09: 00000000ffffe5c5
[  413.516114] R10: ffffffffb3c98520 R11: ffffffffb3d50f98 R12: ffff8eb744cac610
[  413.516501] R13: ffff9c494005be08 R14: ffff8eb744cacb80 R15: ffff8eb7450c2e50
[  413.517008] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  413.517552] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  413.517856] CR2: 00007fbaaa8fbd40 CR3: 0000000036660002 CR4: 0000000000770ef0
[  413.518232] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  413.518756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  413.519407] PKRU: 55555554
[  413.519568] Call Trace:
[  413.519706]  <TASK>
[  413.519886] ? __warn (kernel/panic.c:677) 
[  413.520190] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.520556] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  413.520999] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  413.521289] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  413.521685] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  413.522081] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.522466] br_dev_delete (net/bridge/br_if.c:396) 
[  413.522861] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  413.523271] cleanup_net (net/core/net_namespace.c:630) 
[  413.523614] ? process_one_work (kernel/workqueue.c:2606) 
[  413.524029] process_one_work (kernel/workqueue.c:2633) 
[  413.524429] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  413.524749] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  413.525181] kthread (kernel/kthread.c:388) 
[  413.525478] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.525846] ret_from_fork (arch/x86/kernel/process.c:147) 
[  413.526215] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.526584] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  413.531099] ------------[ cut here ]------------
| [  413.531359] sysfs group 'bridge' not found for kobject 'br0'
| [  413.531816] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  413.532439] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  413.533811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  413.534470] Workqueue: netns cleanup_net
[  413.534748] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 413.535014] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  413.536183] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  413.536463] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe5f6
[  413.536937] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  413.537507] RBP: 0000000000000000 R08: ffffffffb3d51430 R09: 00000000ffffe5f6
[  413.538123] R10: ffffffffb3c98520 R11: ffffffffb3d51430 R12: ffff8eb744ca8610
[  413.538566] R13: ffff9c494005be08 R14: ffff8eb744ca8b80 R15: ffff8eb7450c2e50
[  413.539111] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  413.539626] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  413.539915] CR2: 00007fdf99368270 CR3: 0000000036660006 CR4: 0000000000770ef0
[  413.540483] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  413.540970] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  413.541627] PKRU: 55555554
[  413.541901] Call Trace:
[  413.542150]  <TASK>
[  413.542363] ? __warn (kernel/panic.c:677) 
[  413.542667] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.543062] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  413.543407] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  413.543737] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  413.544149] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  413.544567] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.544977] br_dev_delete (net/bridge/br_if.c:396) 
[  413.545293] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  413.545707] cleanup_net (net/core/net_namespace.c:630) 
[  413.546050] ? process_one_work (kernel/workqueue.c:2606) 
[  413.546419] process_one_work (kernel/workqueue.c:2633) 
[  413.546797] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  413.547138] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  413.547504] kthread (kernel/kthread.c:388) 
[  413.547679] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.547875] ret_from_fork (arch/x86/kernel/process.c:147) 
[  413.548110] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.548315] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  413.678797] ------------[ cut here ]------------
| [  413.679075] sysfs group 'bridge' not found for kobject 'br0'
| [  413.679442] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  413.679888] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  413.680845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  413.681499] Workqueue: netns cleanup_net
[  413.681748] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 413.682023] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  413.682996] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  413.683323] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe62a
[  413.683732] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  413.684113] RBP: 0000000000000000 R08: ffffffffb3d51910 R09: 00000000ffffe62a
[  413.684514] R10: ffffffffb3c98520 R11: ffffffffb3d51910 R12: ffff8eb741936610
[  413.684932] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb7450c1750
[  413.685374] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  413.685805] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  413.686139] CR2: 00007f3294edf000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  413.686573] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  413.686978] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  413.687373] PKRU: 55555554
[  413.687563] Call Trace:
[  413.687750]  <TASK>
[  413.687918] ? __warn (kernel/panic.c:677) 
[  413.688128] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.688387] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  413.688672] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  413.688890] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  413.689110] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  413.689375] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  413.689640] br_dev_delete (net/bridge/br_if.c:396) 
[  413.689880] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  413.690130] cleanup_net (net/core/net_namespace.c:630) 
[  413.690374] ? process_one_work (kernel/workqueue.c:2606) 
[  413.690678] process_one_work (kernel/workqueue.c:2633) 
[  413.690940] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  413.691162] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  413.691431] kthread (kernel/kthread.c:388) 
[  413.691651] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.691889] ret_from_fork (arch/x86/kernel/process.c:147) 
[  413.692099] ? __pfx_kthread (kernel/kthread.c:341) 
[  413.692344] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  421.882788] ------------[ cut here ]------------
| [  421.883067] sysfs group 'bridge' not found for kobject 'br0'
| [  421.883441] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  421.883896] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  421.884861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  421.885496] Workqueue: netns cleanup_net
[  421.885773] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 421.886077] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  421.887047] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  421.887354] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe678
[  421.887801] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  421.888195] RBP: 0000000000000000 R08: ffffffffb3d52060 R09: 00000000ffffe678
[  421.888591] R10: ffffffffb3c98520 R11: ffffffffb3d52060 R12: ffff8eb744ca8610
[  421.888990] R13: ffff9c494005be08 R14: ffff8eb744ca8b80 R15: ffff8eb742e40050
[  421.889410] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  421.889867] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  421.890186] CR2: 00007f6caecc8a30 CR3: 0000000036660004 CR4: 0000000000770ef0
[  421.890650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  421.891102] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  421.891509] PKRU: 55555554
[  421.891692] Call Trace:
[  421.891861]  <TASK>
[  421.892024] ? __warn (kernel/panic.c:677) 
[  421.892229] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  421.892465] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  421.892719] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  421.892944] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  421.893190] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  421.893438] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  421.893708] br_dev_delete (net/bridge/br_if.c:396) 
[  421.893968] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  421.894227] cleanup_net (net/core/net_namespace.c:630) 
[  421.894435] ? process_one_work (kernel/workqueue.c:2606) 
[  421.894715] process_one_work (kernel/workqueue.c:2633) 
[  421.894968] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  421.895208] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  421.895456] kthread (kernel/kthread.c:388) 
[  421.895673] ? __pfx_kthread (kernel/kthread.c:341) 
[  421.895919] ret_from_fork (arch/x86/kernel/process.c:147) 
[  421.896152] ? __pfx_kthread (kernel/kthread.c:341) 
[  421.896390] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  422.006762] ------------[ cut here ]------------
| [  422.007087] sysfs group 'bridge' not found for kobject 'br0'
| [  422.007477] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  422.007957] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  422.008945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  422.009609] Workqueue: netns cleanup_net
[  422.009872] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 422.010161] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  422.011223] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  422.011591] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe6af
[  422.012001] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  422.012383] RBP: 0000000000000000 R08: ffffffffb3d52588 R09: 00000000ffffe6af
[  422.012828] R10: ffffffffb3c98520 R11: ffffffffb3d52588 R12: ffff8eb7421f4610
[  422.013296] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb7450c1750
[  422.013729] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  422.014176] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  422.014538] CR2: 00007f6caecc8a30 CR3: 0000000036660005 CR4: 0000000000770ef0
[  422.014965] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  422.015377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  422.015772] PKRU: 55555554
[  422.015969] Call Trace:
[  422.016192]  <TASK>
[  422.016385] ? __warn (kernel/panic.c:677) 
[  422.016609] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.016870] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  422.017118] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  422.017370] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  422.017605] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  422.017872] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.018158] br_dev_delete (net/bridge/br_if.c:396) 
[  422.018395] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  422.018667] cleanup_net (net/core/net_namespace.c:630) 
[  422.018900] ? process_one_work (kernel/workqueue.c:2606) 
[  422.019163] process_one_work (kernel/workqueue.c:2633) 
[  422.019427] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  422.019655] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  422.019924] kthread (kernel/kthread.c:388) 
[  422.020178] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.020426] ret_from_fork (arch/x86/kernel/process.c:147) 
[  422.020671] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.020926] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  422.023843] ------------[ cut here ]------------
| [  422.024132] sysfs group 'bridge' not found for kobject 'br0'
| [  422.024478] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  422.024907] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  422.025875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  422.026476] Workqueue: netns cleanup_net
[  422.026712] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 422.027000] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  422.027985] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  422.028292] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe6e0
[  422.028693] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  422.029097] RBP: 0000000000000000 R08: ffffffffb3d52a20 R09: 00000000ffffe6e0
[  422.029514] R10: ffffffffb3c98520 R11: ffffffffb3d52a20 R12: ffff8eb7445d6610
[  422.029924] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb7450c1750
[  422.030309] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  422.030769] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  422.031100] CR2: 00007f6caecc8a30 CR3: 0000000036660005 CR4: 0000000000770ef0
[  422.031500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  422.031883] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  422.032282] PKRU: 55555554
[  422.032498] Call Trace:
[  422.032671]  <TASK>
[  422.032856] ? __warn (kernel/panic.c:677) 
[  422.033147] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.033496] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  422.033735] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  422.033937] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  422.034183] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  422.034451] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.034719] br_dev_delete (net/bridge/br_if.c:396) 
[  422.034941] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  422.035216] cleanup_net (net/core/net_namespace.c:630) 
[  422.035458] ? process_one_work (kernel/workqueue.c:2606) 
[  422.035727] process_one_work (kernel/workqueue.c:2633) 
[  422.035964] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  422.036199] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  422.036486] kthread (kernel/kthread.c:388) 
[  422.036692] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.036916] ret_from_fork (arch/x86/kernel/process.c:147) 
[  422.037143] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.037397] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  422.160774] ------------[ cut here ]------------
| [  422.161078] sysfs group 'bridge' not found for kobject 'br0'
| [  422.161447] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  422.161888] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  422.162852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  422.163454] Workqueue: netns cleanup_net
[  422.163704] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 422.163972] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  422.164996] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  422.165353] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe714
[  422.165767] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  422.166177] RBP: 0000000000000000 R08: ffffffffb3d52f00 R09: 00000000ffffe714
[  422.166565] R10: ffffffffb3c98520 R11: ffffffffb3d52f00 R12: ffff8eb7421f6610
[  422.166988] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb7418c0050
[  422.167433] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  422.167876] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  422.168193] CR2: 00007f6caecc8a30 CR3: 0000000036660005 CR4: 0000000000770ef0
[  422.168598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  422.169035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  422.169422] PKRU: 55555554
[  422.169593] Call Trace:
[  422.169728]  <TASK>
[  422.169844] ? __warn (kernel/panic.c:677) 
[  422.170059] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.170359] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  422.170619] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  422.170893] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  422.171172] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  422.171445] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  422.171726] br_dev_delete (net/bridge/br_if.c:396) 
[  422.171947] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  422.172199] cleanup_net (net/core/net_namespace.c:630) 
[  422.172454] ? process_one_work (kernel/workqueue.c:2606) 
[  422.172735] process_one_work (kernel/workqueue.c:2633) 
[  422.172986] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  422.173213] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  422.173501] kthread (kernel/kthread.c:388) 
[  422.173748] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.173989] ret_from_fork (arch/x86/kernel/process.c:147) 
[  422.174213] ? __pfx_kthread (kernel/kthread.c:341) 
[  422.174461] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  430.310806] ------------[ cut here ]------------
| [  430.311090] sysfs group 'bridge' not found for kobject 'br0'
| [  430.311419] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  430.311923] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  430.312911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  430.313497] Workqueue: netns cleanup_net
[  430.313746] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 430.314060] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  430.315044] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  430.315349] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe762
[  430.315765] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  430.316227] RBP: 0000000000000000 R08: ffffffffb3d53650 R09: 00000000ffffe762
[  430.316635] R10: ffffffffb3c98520 R11: ffffffffb3d53650 R12: ffff8eb7421f6610
[  430.317023] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb7418c5c50
[  430.317494] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  430.317975] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.318321] CR2: 00007f5cd1190000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  430.318742] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  430.319148] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  430.319611] PKRU: 55555554
[  430.319823] Call Trace:
[  430.319975]  <TASK>
[  430.320147] ? __warn (kernel/panic.c:677) 
[  430.320372] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.320640] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  430.320885] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  430.321118] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  430.321359] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  430.321617] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.321881] br_dev_delete (net/bridge/br_if.c:396) 
[  430.322130] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  430.322423] cleanup_net (net/core/net_namespace.c:630) 
[  430.322670] ? process_one_work (kernel/workqueue.c:2606) 
[  430.322934] process_one_work (kernel/workqueue.c:2633) 
[  430.323201] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  430.323448] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  430.323733] kthread (kernel/kthread.c:388) 
[  430.323921] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.324180] ret_from_fork (arch/x86/kernel/process.c:147) 
[  430.324425] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.324676] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  430.399744] ------------[ cut here ]------------
| [  430.400004] sysfs group 'bridge' not found for kobject 'br0'
| [  430.400313] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  430.400783] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  430.401776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  430.402385] Workqueue: netns cleanup_net
[  430.402640] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 430.402960] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  430.403917] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  430.404245] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe796
[  430.404642] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  430.405015] RBP: 0000000000000000 R08: ffffffffb3d53b30 R09: 00000000ffffe796
[  430.405436] R10: ffffffffb3c98520 R11: ffffffffb3d53b30 R12: ffff8eb7445d4610
[  430.405862] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffff8eb7418c1750
[  430.406277] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  430.406731] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.407024] CR2: 00007f5cd1190000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  430.407452] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  430.407895] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  430.408287] PKRU: 55555554
[  430.408489] Call Trace:
[  430.408693]  <TASK>
[  430.408845] ? __warn (kernel/panic.c:677) 
[  430.409057] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.409327] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  430.409547] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  430.409794] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  430.410035] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  430.410302] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.410544] br_dev_delete (net/bridge/br_if.c:396) 
[  430.410815] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  430.411097] cleanup_net (net/core/net_namespace.c:630) 
[  430.411332] ? process_one_work (kernel/workqueue.c:2606) 
[  430.411576] process_one_work (kernel/workqueue.c:2633) 
[  430.411825] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  430.412079] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  430.412336] kthread (kernel/kthread.c:388) 
[  430.412547] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.412785] ret_from_fork (arch/x86/kernel/process.c:147) 
[  430.413054] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.413296] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  430.526750] ------------[ cut here ]------------
| [  430.527014] sysfs group 'bridge' not found for kobject 'br0'
| [  430.527324] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  430.527784] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  430.528660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  430.529257] Workqueue: netns cleanup_net
[  430.529465] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 430.529720] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  430.530673] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  430.530954] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe7cd
[  430.531342] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  430.531710] RBP: 0000000000000000 R08: ffffffffb3d54058 R09: 00000000ffffe7cd
[  430.532069] R10: ffffffffb3c98520 R11: ffffffffb3d54058 R12: ffff8eb7447a2610
[  430.532466] R13: ffff9c494005be08 R14: ffff8eb7447a2b80 R15: ffffffffb5278f90
[  430.532835] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  430.533244] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.533566] CR2: 00007f5cd1190000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  430.533928] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  430.534286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  430.534681] PKRU: 55555554
[  430.534824] Call Trace:
[  430.534956]  <TASK>
[  430.535074] ? __warn (kernel/panic.c:677) 
[  430.535248] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.535464] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  430.535696] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  430.535884] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  430.536084] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  430.536304] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.536521] br_dev_delete (net/bridge/br_if.c:396) 
[  430.536748] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  430.536977] cleanup_net (net/core/net_namespace.c:630) 
[  430.537167] ? process_one_work (kernel/workqueue.c:2606) 
[  430.537385] process_one_work (kernel/workqueue.c:2633) 
[  430.537601] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  430.537826] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  430.538050] kthread (kernel/kthread.c:388) 
[  430.538219] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.538415] ret_from_fork (arch/x86/kernel/process.c:147) 
[  430.538614] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.538808] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  430.541408] ------------[ cut here ]------------
| [  430.541651] sysfs group 'bridge' not found for kobject 'br0'
| [  430.541954] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  430.542392] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  430.543266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  430.543868] Workqueue: netns cleanup_net
[  430.544085] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 430.544330] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  430.545282] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  430.545552] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe7fe
[  430.545942] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  430.546297] RBP: 0000000000000000 R08: ffffffffb3d544f0 R09: 00000000ffffe7fe
[  430.546662] R10: ffffffffb3c98520 R11: ffffffffb3d544f0 R12: ffff8eb7445d6610
[  430.547048] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffffffffb5278f90
[  430.547408] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  430.547818] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.548139] CR2: 00007f5cd1190000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  430.548497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  430.548863] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  430.549251] PKRU: 55555554
[  430.549393] Call Trace:
[  430.549524]  <TASK>
[  430.549646] ? __warn (kernel/panic.c:677) 
[  430.549819] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.550035] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  430.550264] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  430.550450] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  430.550661] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  430.550898] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  430.551119] br_dev_delete (net/bridge/br_if.c:396) 
[  430.551341] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  430.551579] cleanup_net (net/core/net_namespace.c:630) 
[  430.551771] ? process_one_work (kernel/workqueue.c:2606) 
[  430.551988] process_one_work (kernel/workqueue.c:2633) 
[  430.552198] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  430.552406] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  430.552653] kthread (kernel/kthread.c:388) 
[  430.552823] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.553018] ret_from_fork (arch/x86/kernel/process.c:147) 
[  430.553208] ? __pfx_kthread (kernel/kthread.c:341) 
[  430.553402] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  438.613822] ------------[ cut here ]------------
| [  438.614235] sysfs group 'bridge' not found for kobject 'br0'
| [  438.614669] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  438.615254] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  438.616610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  438.617482] Workqueue: netns cleanup_net
[  438.617827] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 438.618217] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  438.619602] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  438.620034] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe84c
[  438.620626] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  438.621191] RBP: 0000000000000000 R08: ffffffffb3d54c40 R09: 00000000ffffe84c
[  438.621754] R10: ffffffffb3c98520 R11: ffffffffb3d54c40 R12: ffff8eb742ec2610
[  438.622239] R13: ffff9c494005be08 R14: ffff8eb742ec2b80 R15: ffff8eb744628050
[  438.622675] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  438.623112] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  438.623429] CR2: 00007fd4798d6000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  438.623835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  438.624227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  438.624629] PKRU: 55555554
[  438.624805] Call Trace:
[  438.624951]  <TASK>
[  438.625100] ? __warn (kernel/panic.c:677) 
[  438.625305] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.625555] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  438.625767] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  438.625980] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  438.626213] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  438.626460] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.626700] br_dev_delete (net/bridge/br_if.c:396) 
[  438.626923] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  438.627188] cleanup_net (net/core/net_namespace.c:630) 
[  438.627411] ? process_one_work (kernel/workqueue.c:2606) 
[  438.627647] process_one_work (kernel/workqueue.c:2633) 
[  438.627895] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  438.628124] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  438.628374] kthread (kernel/kthread.c:388) 
[  438.628565] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.628796] ret_from_fork (arch/x86/kernel/process.c:147) 
[  438.629020] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.629240] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  438.729819] ------------[ cut here ]------------
| [  438.730463] sysfs group 'bridge' not found for kobject 'br0'
| [  438.731224] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  438.732251] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  438.734419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  438.735724] Workqueue: netns cleanup_net
[  438.736000] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 438.736388] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  438.737956] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  438.738358] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe883
[  438.738967] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  438.739388] RBP: 0000000000000000 R08: ffffffffb3d55168 R09: 00000000ffffe883
[  438.739809] R10: ffffffffb3c98520 R11: ffffffffb3d55168 R12: ffff8eb742ec4610
[  438.740324] R13: ffff9c494005be08 R14: ffff8eb742ec4b80 R15: ffff8eb744629750
[  438.740715] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  438.741148] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  438.741468] CR2: 00007ffd0044cbc8 CR3: 000000000444c001 CR4: 0000000000770ef0
[  438.741990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  438.742597] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  438.742954] PKRU: 55555554
[  438.743203] Call Trace:
[  438.743387]  <TASK>
[  438.743594] ? __warn (kernel/panic.c:677) 
[  438.743893] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.744278] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  438.744592] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  438.744896] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  438.745214] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  438.745618] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.746044] br_dev_delete (net/bridge/br_if.c:396) 
[  438.746485] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  438.747039] cleanup_net (net/core/net_namespace.c:630) 
[  438.747496] ? process_one_work (kernel/workqueue.c:2606) 
[  438.748142] process_one_work (kernel/workqueue.c:2633) 
[  438.748786] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  438.749321] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  438.749943] kthread (kernel/kthread.c:388) 
[  438.750364] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.750810] ret_from_fork (arch/x86/kernel/process.c:147) 
[  438.751185] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.751716] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  438.756359] ------------[ cut here ]------------
| [  438.756726] sysfs group 'bridge' not found for kobject 'br0'
| [  438.757283] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  438.757966] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  438.759279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  438.760304] Workqueue: netns cleanup_net
[  438.760704] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 438.761201] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  438.762938] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  438.763436] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe8b4
[  438.764058] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  438.764713] RBP: 0000000000000000 R08: ffffffffb3d55600 R09: 00000000ffffe8b4
[  438.765352] R10: ffffffffb3c98520 R11: ffffffffb3d55600 R12: ffff8eb7447a6610
[  438.765987] R13: ffff9c494005be08 R14: ffff8eb7447a6b80 R15: ffff8eb744629750
[  438.766624] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  438.767297] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  438.767603] CR2: 00007ffd0044cbc8 CR3: 0000000036660002 CR4: 0000000000770ef0
[  438.767964] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  438.768404] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  438.768768] PKRU: 55555554
[  438.768912] Call Trace:
[  438.769045]  <TASK>
[  438.769163] ? __warn (kernel/panic.c:677) 
[  438.769365] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.769720] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  438.770056] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  438.770331] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  438.770544] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  438.770837] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.771180] br_dev_delete (net/bridge/br_if.c:396) 
[  438.771510] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  438.771896] cleanup_net (net/core/net_namespace.c:630) 
[  438.772252] ? process_one_work (kernel/workqueue.c:2606) 
[  438.772642] process_one_work (kernel/workqueue.c:2633) 
[  438.772972] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  438.773310] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  438.773701] kthread (kernel/kthread.c:388) 
[  438.773983] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.774296] ret_from_fork (arch/x86/kernel/process.c:147) 
[  438.774610] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.775022] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  438.910758] ------------[ cut here ]------------
| [  438.911022] sysfs group 'bridge' not found for kobject 'br0'
| [  438.911333] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  438.911768] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  438.912668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  438.913252] Workqueue: netns cleanup_net
[  438.913466] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 438.913745] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  438.914710] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  438.915008] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe8e8
[  438.915387] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  438.915784] RBP: 0000000000000000 R08: ffffffffb3d55ae0 R09: 00000000ffffe8e8
[  438.916184] R10: ffffffffb3c98520 R11: ffffffffb3d55ae0 R12: ffff8eb7421f6610
[  438.916584] R13: ffff9c494005be08 R14: ffff8eb7421f6b80 R15: ffff8eb7418c2e50
[  438.916984] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  438.917407] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  438.917720] CR2: 00007ffd0044cbc8 CR3: 0000000036660003 CR4: 0000000000770ef0
[  438.918118] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  438.918496] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  438.918880] PKRU: 55555554
[  438.919026] Call Trace:
[  438.919164]  <TASK>
[  438.919283] ? __warn (kernel/panic.c:677) 
[  438.919462] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.919697] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  438.919905] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  438.920101] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  438.920301] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  438.920535] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  438.920763] br_dev_delete (net/bridge/br_if.c:396) 
[  438.920958] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  438.921189] cleanup_net (net/core/net_namespace.c:630) 
[  438.921381] ? process_one_work (kernel/workqueue.c:2606) 
[  438.921607] process_one_work (kernel/workqueue.c:2633) 
[  438.921822] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  438.922021] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  438.922260] kthread (kernel/kthread.c:388) 
[  438.922431] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.922637] ret_from_fork (arch/x86/kernel/process.c:147) 
[  438.922833] ? __pfx_kthread (kernel/kthread.c:341) 
[  438.923039] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  447.024760] ------------[ cut here ]------------
| [  447.025156] sysfs group 'bridge' not found for kobject 'br0'
| [  447.025623] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  447.026064] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  447.027354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  447.028252] Workqueue: netns cleanup_net
[  447.028608] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.029040] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  447.030441] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  447.030885] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe936
[  447.031492] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  447.032089] RBP: 0000000000000000 R08: ffffffffb3d56230 R09: 00000000ffffe936
[  447.032671] R10: ffffffffb3c98520 R11: ffffffffb3d56230 R12: ffff8eb741c8c610
[  447.033239] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb7450c4550
[  447.033817] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  447.034463] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  447.034941] CR2: 00007fa2fbd6e000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  447.035395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  447.035801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  447.036184] PKRU: 55555554
[  447.036391] Call Trace:
[  447.036563]  <TASK>
[  447.036733] ? __warn (kernel/panic.c:677) 
[  447.036956] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.037189] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  447.037422] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  447.037694] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  447.037927] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  447.038173] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.038429] br_dev_delete (net/bridge/br_if.c:396) 
[  447.038667] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  447.038954] cleanup_net (net/core/net_namespace.c:630) 
[  447.039185] ? process_one_work (kernel/workqueue.c:2606) 
[  447.039449] process_one_work (kernel/workqueue.c:2633) 
[  447.039722] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  447.039949] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  447.040192] kthread (kernel/kthread.c:388) 
[  447.040409] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.040694] ret_from_fork (arch/x86/kernel/process.c:147) 
[  447.040961] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.041197] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  447.157727] ------------[ cut here ]------------
| [  447.157975] sysfs group 'bridge' not found for kobject 'br0'
| [  447.158310] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  447.158840] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  447.159793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  447.160674] Workqueue: netns cleanup_net
[  447.160882] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.161237] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  447.162841] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  447.163303] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe96d
[  447.163957] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  447.164582] RBP: 0000000000000000 R08: ffffffffb3d56758 R09: 00000000ffffe96d
[  447.165208] R10: ffffffffb3c98520 R11: ffffffffb3d56758 R12: ffff8eb7421be610
[  447.165816] R13: ffff9c494005be08 R14: ffff8eb7421beb80 R15: ffff8eb7418c2e50
[  447.166448] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  447.167168] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  447.167684] CR2: 00007fa10ea8a000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  447.168269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  447.168876] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  447.169459] PKRU: 55555554
[  447.169693] Call Trace:
[  447.169930]  <TASK>
[  447.170096] ? __warn (kernel/panic.c:677) 
[  447.170404] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.170748] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  447.171068] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  447.171362] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  447.171723] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  447.172014] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.172232] br_dev_delete (net/bridge/br_if.c:396) 
[  447.172445] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  447.172728] cleanup_net (net/core/net_namespace.c:630) 
[  447.172970] ? process_one_work (kernel/workqueue.c:2606) 
[  447.173301] process_one_work (kernel/workqueue.c:2633) 
[  447.173511] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  447.173717] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  447.173940] kthread (kernel/kthread.c:388) 
[  447.174108] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.174331] ret_from_fork (arch/x86/kernel/process.c:147) 
[  447.174622] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.174974] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  447.178974] ------------[ cut here ]------------
| [  447.179785] sysfs group 'bridge' not found for kobject 'br0'
| [  447.180333] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  447.181099] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  447.182724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  447.183833] Workqueue: netns cleanup_net
[  447.184207] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.184705] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  447.185993] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  447.186257] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe99e
[  447.186629] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  447.186989] RBP: 0000000000000000 R08: ffffffffb3d56bf0 R09: 00000000ffffe99e
[  447.187345] R10: ffffffffb3c98520 R11: ffffffffb3d56bf0 R12: ffff8eb7421f4610
[  447.187718] R13: ffff9c494005be08 R14: ffff8eb7421f4b80 R15: ffff8eb7418c2e50
[  447.188079] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  447.188491] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  447.188823] CR2: 00007ffd0044b8e8 CR3: 0000000036660005 CR4: 0000000000770ef0
[  447.189392] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  447.189924] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  447.190446] PKRU: 55555554
[  447.190784] Call Trace:
[  447.191009]  <TASK>
[  447.191207] ? __warn (kernel/panic.c:677) 
[  447.191571] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.191934] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  447.192295] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  447.192645] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  447.193016] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  447.193450] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.193872] br_dev_delete (net/bridge/br_if.c:396) 
[  447.194197] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  447.194666] cleanup_net (net/core/net_namespace.c:630) 
[  447.195011] ? process_one_work (kernel/workqueue.c:2606) 
[  447.195458] process_one_work (kernel/workqueue.c:2633) 
[  447.195867] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  447.196232] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  447.196736] kthread (kernel/kthread.c:388) 
[  447.197167] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.197710] ret_from_fork (arch/x86/kernel/process.c:147) 
[  447.198280] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.198852] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  447.332776] ------------[ cut here ]------------
| [  447.333069] sysfs group 'bridge' not found for kobject 'br0'
| [  447.333452] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  447.333904] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  447.334930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  447.335580] Workqueue: netns cleanup_net
[  447.335836] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.336121] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  447.337140] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  447.337466] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffe9d2
[  447.337931] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  447.338333] RBP: 0000000000000000 R08: ffffffffb3d570d0 R09: 00000000ffffe9d2
[  447.338761] R10: ffffffffb3c98520 R11: ffffffffb3d570d0 R12: ffff8eb7421bc610
[  447.339205] R13: ffff9c494005be08 R14: ffff8eb7421bcb80 R15: ffff8eb742e45c50
[  447.339631] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  447.340087] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  447.340413] CR2: 00007f6b16173000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  447.340822] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  447.341240] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  447.341680] PKRU: 55555554
[  447.341868] Call Trace:
[  447.342041]  <TASK>
[  447.342187] ? __warn (kernel/panic.c:677) 
[  447.342394] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.342684] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  447.342925] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  447.343148] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  447.343390] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  447.343646] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  447.343891] br_dev_delete (net/bridge/br_if.c:396) 
[  447.344117] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  447.344381] cleanup_net (net/core/net_namespace.c:630) 
[  447.344658] ? process_one_work (kernel/workqueue.c:2606) 
[  447.344902] process_one_work (kernel/workqueue.c:2633) 
[  447.345152] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  447.345403] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  447.345669] kthread (kernel/kthread.c:388) 
[  447.345889] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.346124] ret_from_fork (arch/x86/kernel/process.c:147) 
[  447.346332] ? __pfx_kthread (kernel/kthread.c:341) 
[  447.346565] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  455.489758] ------------[ cut here ]------------
| [  455.490019] sysfs group 'bridge' not found for kobject 'br0'
| [  455.490371] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  455.490821] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  455.491741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  455.492352] Workqueue: netns cleanup_net
[  455.492595] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 455.492880] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  455.493893] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  455.494227] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffea20
[  455.494656] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  455.495059] RBP: 0000000000000000 R08: ffffffffb3d57820 R09: 00000000ffffea20
[  455.495486] R10: ffffffffb3c98520 R11: ffffffffb3d57820 R12: ffff8eb742702610
[  455.495929] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffff8eb7450c4550
[  455.496349] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  455.496817] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  455.497167] CR2: 00007f630f9b0d40 CR3: 0000000002d96004 CR4: 0000000000770ef0
[  455.497610] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  455.498027] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  455.498403] PKRU: 55555554
[  455.498583] Call Trace:
[  455.498755]  <TASK>
[  455.498894] ? __warn (kernel/panic.c:677) 
[  455.499090] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.499338] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  455.499576] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  455.499789] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  455.500025] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  455.500293] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.500569] br_dev_delete (net/bridge/br_if.c:396) 
[  455.500796] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  455.501061] cleanup_net (net/core/net_namespace.c:630) 
[  455.501295] ? process_one_work (kernel/workqueue.c:2606) 
[  455.501567] process_one_work (kernel/workqueue.c:2633) 
[  455.501828] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  455.502046] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  455.502312] kthread (kernel/kthread.c:388) 
[  455.502524] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.502766] ret_from_fork (arch/x86/kernel/process.c:147) 
[  455.502982] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.503219] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  455.610897] ------------[ cut here ]------------
| [  455.611186] sysfs group 'bridge' not found for kobject 'br0'
| [  455.611516] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  455.612002] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  455.612987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  455.613592] Workqueue: netns cleanup_net
[  455.613814] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 455.614098] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  455.615062] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  455.615358] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffea57
[  455.615740] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  455.616124] RBP: 0000000000000000 R08: ffffffffb3d57d48 R09: 00000000ffffea57
[  455.616515] R10: ffffffffb3c98520 R11: ffffffffb3d57d48 R12: ffff8eb7421f0610
[  455.616903] R13: ffff9c494005be08 R14: ffff8eb7421f0b80 R15: ffff8eb742e45c50
[  455.617275] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  455.617712] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  455.618035] CR2: 00007f932c66e270 CR3: 00000000094a8002 CR4: 0000000000770ef0
[  455.618423] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  455.618798] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  455.619182] PKRU: 55555554
[  455.619367] Call Trace:
[  455.619525]  <TASK>
[  455.619664] ? __warn (kernel/panic.c:677) 
[  455.619869] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.620130] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  455.620352] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  455.620557] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  455.620797] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  455.621056] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.621306] br_dev_delete (net/bridge/br_if.c:396) 
[  455.621513] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  455.621783] cleanup_net (net/core/net_namespace.c:630) 
[  455.622009] ? process_one_work (kernel/workqueue.c:2606) 
[  455.622253] process_one_work (kernel/workqueue.c:2633) 
[  455.622479] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  455.622709] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  455.622967] kthread (kernel/kthread.c:388) 
[  455.623181] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.623392] ret_from_fork (arch/x86/kernel/process.c:147) 
[  455.623624] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.623886] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  455.626821] ------------[ cut here ]------------
| [  455.627106] sysfs group 'bridge' not found for kobject 'br0'
| [  455.627453] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  455.627924] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  455.628967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  455.629557] Workqueue: netns cleanup_net
[  455.629789] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 455.630074] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  455.631088] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  455.631405] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffea88
[  455.631817] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  455.632224] RBP: 0000000000000000 R08: ffffffffb3d581e0 R09: 00000000ffffea88
[  455.632629] R10: ffffffffb3c98520 R11: ffffffffb3d581e0 R12: ffff8eb742700610
[  455.633037] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffff8eb742e45c50
[  455.633453] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  455.633920] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  455.634246] CR2: 00007f932c66e270 CR3: 00000000094a8002 CR4: 0000000000770ef0
[  455.634670] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  455.635087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  455.635495] PKRU: 55555554
[  455.635674] Call Trace:
[  455.635861]  <TASK>
[  455.636019] ? __warn (kernel/panic.c:677) 
[  455.636225] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.636459] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  455.636698] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  455.636921] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  455.637174] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  455.637430] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.637713] br_dev_delete (net/bridge/br_if.c:396) 
[  455.637946] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  455.638219] cleanup_net (net/core/net_namespace.c:630) 
[  455.638439] ? process_one_work (kernel/workqueue.c:2606) 
[  455.638709] process_one_work (kernel/workqueue.c:2633) 
[  455.638991] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  455.639219] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  455.639460] kthread (kernel/kthread.c:388) 
[  455.639668] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.639905] ret_from_fork (arch/x86/kernel/process.c:147) 
[  455.640150] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.640359] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  455.770756] ------------[ cut here ]------------
| [  455.771047] sysfs group 'bridge' not found for kobject 'br0'
| [  455.771377] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  455.771825] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  455.772775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  455.773388] Workqueue: netns cleanup_net
[  455.773636] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 455.773894] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  455.774851] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  455.775153] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeabc
[  455.775584] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  455.775979] RBP: 0000000000000000 R08: ffffffffb3d586c0 R09: 00000000ffffeabc
[  455.776361] R10: ffffffffb3c98520 R11: ffffffffb3d586c0 R12: ffff8eb7447a0610
[  455.776775] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffff8eb7450c1750
[  455.777176] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  455.777632] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  455.777954] CR2: 00007f932c66e270 CR3: 0000000036660004 CR4: 0000000000770ef0
[  455.778325] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  455.778717] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  455.779113] PKRU: 55555554
[  455.779317] Call Trace:
[  455.779483]  <TASK>
[  455.779639] ? __warn (kernel/panic.c:677) 
[  455.779854] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.780105] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  455.780342] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  455.780567] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  455.780830] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  455.781078] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  455.781338] br_dev_delete (net/bridge/br_if.c:396) 
[  455.781555] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  455.781805] cleanup_net (net/core/net_namespace.c:630) 
[  455.782018] ? process_one_work (kernel/workqueue.c:2606) 
[  455.782263] process_one_work (kernel/workqueue.c:2633) 
[  455.782520] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  455.782745] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  455.782990] kthread (kernel/kthread.c:388) 
[  455.783189] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.783407] ret_from_fork (arch/x86/kernel/process.c:147) 
[  455.783615] ? __pfx_kthread (kernel/kthread.c:341) 
[  455.783832] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  467.414845] ------------[ cut here ]------------
| [  467.415666] sysfs group 'bridge' not found for kobject 'br0'
| [  467.416564] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  467.417855] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  467.420700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  467.421638] Workqueue: netns cleanup_net
[  467.421948] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.422317] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  467.423699] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  467.424078] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeb0a
[  467.424614] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  467.424982] RBP: 0000000000000000 R08: ffffffffb3d58e10 R09: 00000000ffffeb0a
[  467.425340] R10: ffffffffb3c98520 R11: ffffffffb3d58e10 R12: ffff8eb744634610
[  467.425712] R13: ffff9c494005be08 R14: ffff8eb744634b80 R15: ffff8eb74462ae50
[  467.426071] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  467.426477] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  467.426781] CR2: 00007f6caecc8a30 CR3: 0000000036660004 CR4: 0000000000770ef0
[  467.427139] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  467.427498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  467.427870] PKRU: 55555554
[  467.428013] Call Trace:
[  467.428147]  <TASK>
[  467.428263] ? __warn (kernel/panic.c:677) 
[  467.428437] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.428679] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  467.428885] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  467.429071] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  467.429270] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  467.429490] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.429726] br_dev_delete (net/bridge/br_if.c:396) 
[  467.429918] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  467.430148] cleanup_net (net/core/net_namespace.c:630) 
[  467.430339] ? process_one_work (kernel/workqueue.c:2606) 
[  467.430572] process_one_work (kernel/workqueue.c:2633) 
[  467.430796] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  467.430996] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  467.431217] kthread (kernel/kthread.c:388) 
[  467.431386] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.431590] ret_from_fork (arch/x86/kernel/process.c:147) 
[  467.431791] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.431986] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  467.534777] ------------[ cut here ]------------
| [  467.535310] sysfs group 'bridge' not found for kobject 'br0'
| [  467.535977] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  467.536747] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  467.538478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  467.539679] Workqueue: netns cleanup_net
[  467.539894] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.540169] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  467.541367] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  467.541638] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeb41
[  467.541997] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  467.542585] RBP: 0000000000000000 R08: ffffffffb3d59338 R09: 00000000ffffeb41
[  467.543119] R10: ffffffffb3c98520 R11: ffffffffb3d59338 R12: ffff8eb741c8a610
[  467.543667] R13: ffff9c494005be08 R14: ffff8eb741c8ab80 R15: ffff8eb7450c1750
[  467.544443] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  467.545314] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  467.545954] CR2: 00007f4305dc9000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  467.546765] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  467.547625] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  467.548449] PKRU: 55555554
[  467.548786] Call Trace:
[  467.549081]  <TASK>
[  467.549342] ? __warn (kernel/panic.c:677) 
[  467.549714] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.550186] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  467.550620] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  467.550920] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  467.551325] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  467.551711] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.552122] br_dev_delete (net/bridge/br_if.c:396) 
[  467.552548] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  467.552956] cleanup_net (net/core/net_namespace.c:630) 
[  467.553349] ? process_one_work (kernel/workqueue.c:2606) 
[  467.553779] process_one_work (kernel/workqueue.c:2633) 
[  467.554189] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  467.554591] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  467.554815] kthread (kernel/kthread.c:388) 
[  467.555027] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.555268] ret_from_fork (arch/x86/kernel/process.c:147) 
[  467.555502] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.555907] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  467.559521] ------------[ cut here ]------------
| [  467.559919] sysfs group 'bridge' not found for kobject 'br0'
| [  467.560231] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  467.560937] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  467.562510] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  467.563566] Workqueue: netns cleanup_net
[  467.563945] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.564352] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  467.566138] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  467.566631] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeb72
[  467.567348] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  467.568036] RBP: 0000000000000000 R08: ffffffffb3d597d0 R09: 00000000ffffeb72
[  467.568738] R10: ffffffffb3c98520 R11: ffffffffb3d597d0 R12: ffff8eb742700610
[  467.569395] R13: ffff9c494005be08 R14: ffff8eb742700b80 R15: ffff8eb7450c1750
[  467.569926] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  467.570338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  467.570758] CR2: 00007f4305dc9000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  467.571117] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  467.571478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  467.571944] PKRU: 55555554
[  467.572188] Call Trace:
[  467.572456]  <TASK>
[  467.572635] ? __warn (kernel/panic.c:677) 
[  467.572808] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.573185] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  467.573564] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  467.573943] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  467.574383] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  467.574930] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.575449] br_dev_delete (net/bridge/br_if.c:396) 
[  467.575893] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  467.576402] cleanup_net (net/core/net_namespace.c:630) 
[  467.576811] ? process_one_work (kernel/workqueue.c:2606) 
[  467.577273] process_one_work (kernel/workqueue.c:2633) 
[  467.577737] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  467.578179] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  467.578690] kthread (kernel/kthread.c:388) 
[  467.579036] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.579444] ret_from_fork (arch/x86/kernel/process.c:147) 
[  467.579855] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.580256] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  467.688752] ------------[ cut here ]------------
| [  467.689243] sysfs group 'bridge' not found for kobject 'br0'
| [  467.689857] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  467.690696] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  467.691911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  467.692486] Workqueue: netns cleanup_net
[  467.692708] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.692993] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  467.694429] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  467.694942] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeba6
[  467.695703] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  467.696479] RBP: 0000000000000000 R08: ffffffffb3d59cb0 R09: 00000000ffffeba6
[  467.697249] R10: ffffffffb3c98520 R11: ffffffffb3d59cb0 R12: ffff8eb742702610
[  467.698067] R13: ffff9c494005be08 R14: ffff8eb742702b80 R15: ffff8eb74462c550
[  467.698829] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  467.699732] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  467.700356] CR2: 00007f4305dc9000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  467.701204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  467.701986] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  467.702647] PKRU: 55555554
[  467.702955] Call Trace:
[  467.703231]  <TASK>
[  467.703485] ? __warn (kernel/panic.c:677) 
[  467.703827] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.704317] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  467.704691] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  467.705062] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  467.705501] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  467.705794] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  467.706041] br_dev_delete (net/bridge/br_if.c:396) 
[  467.706254] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  467.706574] cleanup_net (net/core/net_namespace.c:630) 
[  467.706817] ? process_one_work (kernel/workqueue.c:2606) 
[  467.707207] process_one_work (kernel/workqueue.c:2633) 
[  467.707417] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  467.707629] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  467.707862] kthread (kernel/kthread.c:388) 
[  467.708112] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.708457] ret_from_fork (arch/x86/kernel/process.c:147) 
[  467.708809] ? __pfx_kthread (kernel/kthread.c:341) 
[  467.709013] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  479.359732] ------------[ cut here ]------------
| [  479.360192] sysfs group 'bridge' not found for kobject 'br0'
| [  479.360776] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  479.361555] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  479.363079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  479.364054] Workqueue: netns cleanup_net
[  479.364396] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 479.364814] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  479.366284] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  479.366724] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffebf4
[  479.367293] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  479.367891] RBP: 0000000000000000 R08: ffffffffb3d5a400 R09: 00000000ffffebf4
[  479.368425] R10: ffffffffb3c98520 R11: ffffffffb3d5a400 R12: ffff8eb741c8e610
[  479.369027] R13: ffff9c494005be08 R14: ffff8eb741c8eb80 R15: ffff8eb74462ae50
[  479.369387] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  479.369853] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  479.370228] CR2: 00007fc3d69acd40 CR3: 0000000002d96004 CR4: 0000000000770ef0
[  479.370658] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  479.371226] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  479.371642] PKRU: 55555554
[  479.371857] Call Trace:
[  479.372142]  <TASK>
[  479.372411] ? __warn (kernel/panic.c:677) 
[  479.372849] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.373176] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  479.373610] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  479.374036] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  479.374619] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  479.375226] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.375846] br_dev_delete (net/bridge/br_if.c:396) 
[  479.376372] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  479.377017] cleanup_net (net/core/net_namespace.c:630) 
[  479.377558] ? process_one_work (kernel/workqueue.c:2606) 
[  479.378147] process_one_work (kernel/workqueue.c:2633) 
[  479.378750] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  479.379242] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  479.379865] kthread (kernel/kthread.c:388) 
[  479.380363] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.380838] ret_from_fork (arch/x86/kernel/process.c:147) 
[  479.381351] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.381759] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  479.527758] ------------[ cut here ]------------
| [  479.528204] sysfs group 'bridge' not found for kobject 'br0'
| [  479.528756] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  479.529491] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  479.531272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  479.532383] Workqueue: netns cleanup_net
[  479.532744] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 479.533180] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  479.534880] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  479.535291] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffec2e
[  479.535917] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  479.536527] RBP: 0000000000000000 R08: ffffffffb3d5a970 R09: 00000000ffffec2e
[  479.536887] R10: ffffffffb3c98520 R11: ffffffffb3d5a970 R12: ffff8eb7445d6610
[  479.537319] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffffffffb5278f90
[  479.537727] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  479.538123] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  479.538409] CR2: 00007f50285e1000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  479.538768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  479.539119] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  479.539468] PKRU: 55555554
[  479.539632] Call Trace:
[  479.539771]  <TASK>
[  479.539895] ? __warn (kernel/panic.c:677) 
[  479.540070] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.540282] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  479.540592] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  479.540789] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  479.540996] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  479.541227] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.541456] br_dev_delete (net/bridge/br_if.c:396) 
[  479.541664] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  479.541900] cleanup_net (net/core/net_namespace.c:630) 
[  479.542099] ? process_one_work (kernel/workqueue.c:2606) 
[  479.542328] process_one_work (kernel/workqueue.c:2633) 
[  479.542555] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  479.542759] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  479.542993] kthread (kernel/kthread.c:388) 
[  479.543167] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.543375] ret_from_fork (arch/x86/kernel/process.c:147) 
[  479.543586] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.543788] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  479.546482] ------------[ cut here ]------------
| [  479.546748] sysfs group 'bridge' not found for kobject 'br0'
| [  479.547072] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  479.547500] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  479.548402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  479.548972] Workqueue: netns cleanup_net
[  479.549172] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 479.549411] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  479.550314] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  479.550593] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffec5f
[  479.550943] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  479.551290] RBP: 0000000000000000 R08: ffffffffb3d5ae08 R09: 00000000ffffec5f
[  479.551646] R10: ffffffffb3c98520 R11: ffffffffb3d5ae08 R12: ffff8eb7447a0610
[  479.551994] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffffffffb5278f90
[  479.552348] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  479.552756] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  479.553039] CR2: 00007f50285e1000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  479.553390] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  479.553757] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  479.554130] PKRU: 55555554
[  479.554281] Call Trace:
[  479.554412]  <TASK>
[  479.554541] ? __warn (kernel/panic.c:677) 
[  479.554723] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.554948] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  479.555148] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  479.555338] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  479.555555] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  479.555777] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.556007] br_dev_delete (net/bridge/br_if.c:396) 
[  479.556199] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  479.556421] cleanup_net (net/core/net_namespace.c:630) 
[  479.556617] ? process_one_work (kernel/workqueue.c:2606) 
[  479.556831] process_one_work (kernel/workqueue.c:2633) 
[  479.557036] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  479.557231] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  479.557452] kthread (kernel/kthread.c:388) 
[  479.557624] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.557817] ret_from_fork (arch/x86/kernel/process.c:147) 
[  479.558023] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.558230] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  479.560938] ------------[ cut here ]------------
| [  479.561188] sysfs group 'bridge' not found for kobject 'br0'
| [  479.561502] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  479.561932] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  479.562842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  479.563427] Workqueue: netns cleanup_net
[  479.563648] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 479.563899] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  479.564847] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  479.565117] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffec90
[  479.565481] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  479.565844] RBP: 0000000000000000 R08: ffffffffb3d5b2a0 R09: 00000000ffffec90
[  479.566214] R10: ffffffffb3c98520 R11: ffffffffb3d5b2a0 R12: ffff8eb7445d4610
[  479.566589] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffffffffb5278f90
[  479.566945] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  479.567349] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  479.567667] CR2: 00007f50285e1000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  479.568022] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  479.568400] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  479.568779] PKRU: 55555554
[  479.568931] Call Trace:
[  479.569067]  <TASK>
[  479.569187] ? __warn (kernel/panic.c:677) 
[  479.569365] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.569600] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  479.569801] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  479.569991] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  479.570202] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  479.570431] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  479.570677] br_dev_delete (net/bridge/br_if.c:396) 
[  479.570879] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  479.571116] cleanup_net (net/core/net_namespace.c:630) 
[  479.571313] ? process_one_work (kernel/workqueue.c:2606) 
[  479.571550] process_one_work (kernel/workqueue.c:2633) 
[  479.571777] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  479.571979] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  479.572207] kthread (kernel/kthread.c:388) 
[  479.572387] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.572601] ret_from_fork (arch/x86/kernel/process.c:147) 
[  479.572796] ? __pfx_kthread (kernel/kthread.c:341) 
[  479.573004] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  488.359918] ------------[ cut here ]------------
| [  488.360504] sysfs group 'bridge' not found for kobject 'br0'
| [  488.360962] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  488.361612] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  488.363039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  488.363709] Workqueue: netns cleanup_net
[  488.364182] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 488.364523] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  488.366371] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  488.367041] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffecde
[  488.367936] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  488.368801] RBP: 0000000000000000 R08: ffffffffb3d5b9f0 R09: 00000000ffffecde
[  488.369683] R10: ffffffffb3c98520 R11: ffffffffb3d5b9f0 R12: ffff8eb742704610
[  488.370559] R13: ffff9c494005be08 R14: ffff8eb742704b80 R15: ffff8eb7418c2e50
[  488.371525] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  488.372541] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  488.373241] CR2: 00007f90804e6000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  488.374119] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  488.375007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  488.375742] PKRU: 55555554
[  488.375886] Call Trace:
[  488.376045]  <TASK>
[  488.376163] ? __warn (kernel/panic.c:677) 
[  488.376359] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.376590] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  488.376784] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  488.376969] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  488.377169] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  488.377390] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.377619] br_dev_delete (net/bridge/br_if.c:396) 
[  488.377810] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  488.378039] cleanup_net (net/core/net_namespace.c:630) 
[  488.378232] ? process_one_work (kernel/workqueue.c:2606) 
[  488.378448] process_one_work (kernel/workqueue.c:2633) 
[  488.378675] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  488.378872] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  488.379094] kthread (kernel/kthread.c:388) 
[  488.379262] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.379456] ret_from_fork (arch/x86/kernel/process.c:147) 
[  488.379658] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.379856] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  488.490753] ------------[ cut here ]------------
| [  488.491205] sysfs group 'bridge' not found for kobject 'br0'
| [  488.491522] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  488.492322] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  488.493388] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  488.494534] Workqueue: netns cleanup_net
[  488.494869] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 488.495367] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  488.496785] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  488.497329] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffed15
[  488.498072] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  488.498770] RBP: 0000000000000000 R08: ffffffffb3d5bf18 R09: 00000000ffffed15
[  488.499517] R10: ffffffffb3c98520 R11: ffffffffb3d5bf18 R12: ffff8eb741d46610
[  488.500289] R13: ffff9c494005be08 R14: ffff8eb741d46b80 R15: ffff8eb742e42e50
[  488.501039] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  488.501795] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  488.502309] CR2: 00007f2266387000 CR3: 0000000036660001 CR4: 0000000000770ef0
[  488.502893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  488.503422] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  488.503788] PKRU: 55555554
[  488.503932] Call Trace:
[  488.504120]  <TASK>
[  488.504256] ? __warn (kernel/panic.c:677) 
[  488.504448] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.504678] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  488.504874] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  488.505060] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  488.505260] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  488.505515] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.505864] br_dev_delete (net/bridge/br_if.c:396) 
[  488.506173] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  488.506477] cleanup_net (net/core/net_namespace.c:630) 
[  488.506704] ? process_one_work (kernel/workqueue.c:2606) 
[  488.506965] process_one_work (kernel/workqueue.c:2633) 
[  488.507352] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  488.507823] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  488.508353] kthread (kernel/kthread.c:388) 
[  488.508655] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.508963] ret_from_fork (arch/x86/kernel/process.c:147) 
[  488.509237] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.509546] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  488.513471] ------------[ cut here ]------------
| [  488.514040] sysfs group 'bridge' not found for kobject 'br0'
| [  488.514719] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  488.515586] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  488.517408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  488.518636] Workqueue: netns cleanup_net
[  488.519054] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 488.519572] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  488.521050] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  488.521589] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffed46
[  488.522128] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  488.522687] RBP: 0000000000000000 R08: ffffffffb3d5c3b0 R09: 00000000ffffed46
[  488.523332] R10: ffffffffb3c98520 R11: ffffffffb3d5c3b0 R12: ffff8eb742706610
[  488.524037] R13: ffff9c494005be08 R14: ffff8eb742706b80 R15: ffff8eb742e42e50
[  488.524608] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  488.525364] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  488.525901] CR2: 000055a96c623cc0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  488.526558] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  488.527224] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  488.527874] PKRU: 55555554
[  488.528134] Call Trace:
[  488.528387]  <TASK>
[  488.528575] ? __warn (kernel/panic.c:677) 
[  488.528895] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.529308] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  488.529692] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  488.530029] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  488.530360] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  488.530742] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.531082] br_dev_delete (net/bridge/br_if.c:396) 
[  488.531425] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  488.531868] cleanup_net (net/core/net_namespace.c:630) 
[  488.532232] ? process_one_work (kernel/workqueue.c:2606) 
[  488.532748] process_one_work (kernel/workqueue.c:2633) 
[  488.533266] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  488.533737] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  488.534100] kthread (kernel/kthread.c:388) 
[  488.534374] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.534763] ret_from_fork (arch/x86/kernel/process.c:147) 
[  488.535043] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.535332] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  488.661784] ------------[ cut here ]------------
| [  488.662146] sysfs group 'bridge' not found for kobject 'br0'
| [  488.662638] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  488.663118] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  488.664490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  488.665376] Workqueue: netns cleanup_net
[  488.665805] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 488.666359] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  488.668099] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  488.668654] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffed7a
[  488.669264] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  488.669890] RBP: 0000000000000000 R08: ffffffffb3d5c890 R09: 00000000ffffed7a
[  488.670577] R10: ffffffffb3c98520 R11: ffffffffb3d5c890 R12: ffff8eb7447a2610
[  488.671266] R13: ffff9c494005be08 R14: ffff8eb7447a2b80 R15: ffff8eb744628050
[  488.671962] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  488.672695] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  488.673257] CR2: 000055a96c623cc0 CR3: 0000000036660004 CR4: 0000000000770ef0
[  488.673987] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  488.674650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  488.675411] PKRU: 55555554
[  488.675638] Call Trace:
[  488.675857]  <TASK>
[  488.676033] ? __warn (kernel/panic.c:677) 
[  488.676323] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.676677] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  488.677008] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  488.677334] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  488.677689] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  488.677987] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  488.678367] br_dev_delete (net/bridge/br_if.c:396) 
[  488.678719] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  488.679189] cleanup_net (net/core/net_namespace.c:630) 
[  488.679426] ? process_one_work (kernel/workqueue.c:2606) 
[  488.679649] process_one_work (kernel/workqueue.c:2633) 
[  488.679910] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  488.680194] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  488.680449] kthread (kernel/kthread.c:388) 
[  488.680627] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.680824] ret_from_fork (arch/x86/kernel/process.c:147) 
[  488.681015] ? __pfx_kthread (kernel/kthread.c:341) 
[  488.681210] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  500.745402] ------------[ cut here ]------------
| [  500.745855] sysfs group 'bridge' not found for kobject 'br0'
| [  500.746564] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  500.747325] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  500.748952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  500.749909] Workqueue: netns cleanup_net
[  500.750260] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 500.750685] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  500.752300] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  500.752729] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffedc8
[  500.753303] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  500.753899] RBP: 0000000000000000 R08: ffffffffb3d5cfe0 R09: 00000000ffffedc8
[  500.754486] R10: ffffffffb3c98520 R11: ffffffffb3d5cfe0 R12: ffff8eb7447a4610
[  500.755092] R13: ffff9c494005be08 R14: ffff8eb7447a4b80 R15: ffff8eb7418c2e50
[  500.755952] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  500.756684] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  500.757190] CR2: 00007fda99759000 CR3: 0000000002d96006 CR4: 0000000000770ef0
[  500.757832] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  500.758642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  500.759710] PKRU: 55555554
[  500.760202] Call Trace:
[  500.761364]  <TASK>
[  500.761858] ? __warn (kernel/panic.c:677) 
[  500.762740] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  500.763417] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  500.764123] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  500.764607] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  500.765015] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  500.765418] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  500.765990] br_dev_delete (net/bridge/br_if.c:396) 
[  500.766435] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  500.767196] cleanup_net (net/core/net_namespace.c:630) 
[  500.767644] ? process_one_work (kernel/workqueue.c:2606) 
[  500.768081] process_one_work (kernel/workqueue.c:2633) 
[  500.768540] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  500.768937] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  500.769330] kthread (kernel/kthread.c:388) 
[  500.769812] ? __pfx_kthread (kernel/kthread.c:341) 
[  500.770237] ret_from_fork (arch/x86/kernel/process.c:147) 
[  500.770693] ? __pfx_kthread (kernel/kthread.c:341) 
[  500.771058] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  500.997910] ------------[ cut here ]------------
| [  500.998472] sysfs group 'bridge' not found for kobject 'br0'
| [  500.999088] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  501.000019] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  501.002033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  501.003342] Workqueue: netns cleanup_net
[  501.003851] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.004423] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  501.006595] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  501.007238] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffedfc
[  501.008078] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  501.008892] RBP: 0000000000000000 R08: ffffffffb3d5d4c0 R09: 00000000ffffedfc
[  501.016599] R10: ffffffffb3c98520 R11: ffffffffb3d5d4c0 R12: ffff8eb741c8c610
[  501.017173] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb744629750
[  501.017780] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  501.018453] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.018915] CR2: 000055a96c628580 CR3: 000000000444c003 CR4: 0000000000770ef0
[  501.019487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  501.020193] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  501.020793] PKRU: 55555554
[  501.021018] Call Trace:
[  501.021224]  <TASK>
[  501.021407] ? __warn (kernel/panic.c:677) 
[  501.021695] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.022045] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  501.022349] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  501.022658] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  501.022985] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  501.023340] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.023695] br_dev_delete (net/bridge/br_if.c:396) 
[  501.024002] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  501.024368] cleanup_net (net/core/net_namespace.c:630) 
[  501.024698] ? process_one_work (kernel/workqueue.c:2606) 
[  501.025045] process_one_work (kernel/workqueue.c:2633) 
[  501.025383] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  501.025708] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  501.026061] kthread (kernel/kthread.c:388) 
[  501.026329] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.026657] ret_from_fork (arch/x86/kernel/process.c:147) 
[  501.027230] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.027595] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  501.216010] ------------[ cut here ]------------
| [  501.216436] sysfs group 'bridge' not found for kobject 'br0'
| [  501.216955] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  501.217637] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  501.219066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  501.220003] Workqueue: netns cleanup_net
[  501.220342] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.220765] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  501.222280] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  501.222727] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffee30
[  501.223319] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  501.223913] RBP: 0000000000000000 R08: ffffffffb3d5d9a0 R09: 00000000ffffee30
[  501.224502] R10: ffffffffb3c98520 R11: ffffffffb3d5d9a0 R12: ffff8eb7445d2610
[  501.225092] R13: ffff9c494005be08 R14: ffff8eb7445d2b80 R15: ffff8eb744628050
[  501.225693] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  501.226359] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.226842] CR2: 000055a96c628580 CR3: 0000000036660004 CR4: 0000000000770ef0
[  501.227402] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  501.227997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  501.228597] PKRU: 55555554
[  501.228833] Call Trace:
[  501.229053]  <TASK>
[  501.229244] ? __warn (kernel/panic.c:677) 
[  501.229543] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.229900] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  501.230223] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  501.239554] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  501.239904] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  501.240262] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.240643] br_dev_delete (net/bridge/br_if.c:396) 
[  501.240952] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  501.241325] cleanup_net (net/core/net_namespace.c:630) 
[  501.241732] ? process_one_work (kernel/workqueue.c:2606) 
[  501.242085] process_one_work (kernel/workqueue.c:2633) 
[  501.242428] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  501.242792] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  501.243155] kthread (kernel/kthread.c:388) 
[  501.243428] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.243755] ret_from_fork (arch/x86/kernel/process.c:147) 
[  501.244061] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.244374] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  501.439970] ------------[ cut here ]------------
| [  501.440443] sysfs group 'bridge' not found for kobject 'br0'
| [  501.440946] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  501.441598] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  501.442940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  501.443817] Workqueue: netns cleanup_net
[  501.444134] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.444512] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  501.445891] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  501.446249] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffee64
[  501.446742] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  501.447218] RBP: 0000000000000000 R08: ffffffffb3d5de80 R09: 00000000ffffee64
[  501.447715] R10: ffffffffb3c98520 R11: ffffffffb3d5de80 R12: ffff8eb7479a2610
[  501.448192] R13: ffff9c494005be08 R14: ffff8eb7479a2b80 R15: ffffffffb5278f90
[  501.448686] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  501.449292] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.449742] CR2: 00007f3d7fa4e000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  501.450274] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  501.450829] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  501.451354] PKRU: 55555554
[  501.451576] Call Trace:
[  501.451767]  <TASK>
[  501.451933] ? __warn (kernel/panic.c:677) 
[  501.452177] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.452481] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  501.452785] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  501.453062] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  501.453362] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  501.453712] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  501.454043] br_dev_delete (net/bridge/br_if.c:396) 
[  501.454325] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  501.454678] cleanup_net (net/core/net_namespace.c:630) 
[  501.454968] ? process_one_work (kernel/workqueue.c:2606) 
[  501.455287] process_one_work (kernel/workqueue.c:2633) 
[  501.455606] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  501.455888] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  501.456201] kthread (kernel/kthread.c:388) 
[  501.456437] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.456725] ret_from_fork (arch/x86/kernel/process.c:147) 
[  501.456994] ? __pfx_kthread (kernel/kthread.c:341) 
[  501.457270] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  517.571031] ------------[ cut here ]------------
| [  517.571458] sysfs group 'bridge' not found for kobject 'br0'
| [  517.571948] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  517.572613] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  517.581176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  517.592649] Workqueue: netns cleanup_net
[  517.595265] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 517.596666] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  517.604015] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  517.604456] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeeb3
[  517.605114] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  517.605730] RBP: 0000000000000000 R08: ffffffffb3d5e5e8 R09: 00000000ffffeeb3
[  517.606318] R10: ffffffffb3c98520 R11: ffffffffb3d5e5e8 R12: ffff8eb744ca6610
[  517.606925] R13: ffff9c494005be08 R14: ffff8eb744ca6b80 R15: ffff8eb7450c2e50
[  517.607517] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  517.608170] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  517.608683] CR2: 00007f6caecc8a30 CR3: 0000000036660005 CR4: 0000000000770ef0
[  517.609263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  517.609864] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  517.610457] PKRU: 55555554
[  517.619852] Call Trace:
[  517.620058]  <TASK>
[  517.620221] ? __warn (kernel/panic.c:677) 
[  517.620962] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  517.621306] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  517.622014] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  517.622428] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  517.623061] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  517.623835] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  517.624208] br_dev_delete (net/bridge/br_if.c:396) 
[  517.624871] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  517.626140] cleanup_net (net/core/net_namespace.c:630) 
[  517.627981] ? process_one_work (kernel/workqueue.c:2606) 
[  517.630242] process_one_work (kernel/workqueue.c:2633) 
[  517.631873] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  517.633538] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  517.640002] kthread (kernel/kthread.c:388) 
[  517.644425] ? __pfx_kthread (kernel/kthread.c:341) 
[  517.645012] ret_from_fork (arch/x86/kernel/process.c:147) 
[  517.645604] ? __pfx_kthread (kernel/kthread.c:341) 
[  517.646224] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  517.831936] ------------[ cut here ]------------
| [  517.832517] sysfs group 'bridge' not found for kobject 'br0'
| [  517.833161] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  517.834111] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  517.836047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  517.837399] Workqueue: netns cleanup_net
[  517.837851] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 517.838429] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  517.839960] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  517.840444] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffeee7
[  517.841023] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  517.841615] RBP: 0000000000000000 R08: ffffffffb3d5eac8 R09: 00000000ffffeee7
[  517.842207] R10: ffffffffb3c98520 R11: ffffffffb3d5eac8 R12: ffff8eb744ca8610
[  517.842818] R13: ffff9c494005be08 R14: ffff8eb744ca8b80 R15: ffff8eb7450c1750
[  517.843422] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  517.844103] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  517.844591] CR2: 00007f9a6ddae000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  517.845186] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  517.845771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  517.846361] PKRU: 55555554
[  517.846608] Call Trace:
[  517.846845]  <TASK>
[  517.847040] ? __warn (kernel/panic.c:677) 
[  517.847332] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  517.847717] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  517.848045] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  517.848372] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  517.848712] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  517.849075] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  517.849443] br_dev_delete (net/bridge/br_if.c:396) 
[  517.849754] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  517.850126] cleanup_net (net/core/net_namespace.c:630) 
[  517.850450] ? process_one_work (kernel/workqueue.c:2606) 
[  517.850808] process_one_work (kernel/workqueue.c:2633) 
[  517.851160] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  517.851489] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  517.851877] kthread (kernel/kthread.c:388) 
[  517.852153] ? __pfx_kthread (kernel/kthread.c:341) 
[  517.852477] ret_from_fork (arch/x86/kernel/process.c:147) 
[  517.852806] ? __pfx_kthread (kernel/kthread.c:341) 
[  517.853125] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  517.999913] ------------[ cut here ]------------
| [  518.000390] sysfs group 'bridge' not found for kobject 'br0'
| [  518.001251] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  518.002419] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  518.005008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  518.005917] Workqueue: netns cleanup_net
[  518.006201] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 518.006544] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  518.007817] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  518.008177] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffef1b
[  518.008669] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  518.009149] RBP: 0000000000000000 R08: ffffffffb3d5efa8 R09: 00000000ffffef1b
[  518.009645] R10: ffffffffb3c98520 R11: ffffffffb3d5efa8 R12: ffff8eb744cae610
[  518.010126] R13: ffff9c494005be08 R14: ffff8eb744caeb80 R15: ffff8eb744628050
[  518.010632] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  518.011171] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  518.011599] CR2: 000055a96b9ea5a0 CR3: 0000000036660006 CR4: 0000000000770ef0
[  518.012087] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  518.020808] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  518.021398] PKRU: 55555554
[  518.021657] Call Trace:
[  518.021874]  <TASK>
[  518.022063] ? __warn (kernel/panic.c:677) 
[  518.022378] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  518.022770] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  518.023105] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  518.023416] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  518.023771] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  518.024141] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  518.024506] br_dev_delete (net/bridge/br_if.c:396) 
[  518.024927] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  518.025302] cleanup_net (net/core/net_namespace.c:630) 
[  518.025626] ? process_one_work (kernel/workqueue.c:2606) 
[  518.025978] process_one_work (kernel/workqueue.c:2633) 
[  518.026331] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  518.026655] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  518.027000] kthread (kernel/kthread.c:388) 
[  518.027262] ? __pfx_kthread (kernel/kthread.c:341) 
[  518.027586] ret_from_fork (arch/x86/kernel/process.c:147) 
[  518.027885] ? __pfx_kthread (kernel/kthread.c:341) 
[  518.028188] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  518.174916] ------------[ cut here ]------------
| [  518.175363] sysfs group 'bridge' not found for kobject 'br0'
| [  518.175989] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  518.176672] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  518.178109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  518.179039] Workqueue: netns cleanup_net
[  518.179391] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 518.179816] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  518.181462] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  518.181922] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffef4f
[  518.182520] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  518.183126] RBP: 0000000000000000 R08: ffffffffb3d5f488 R09: 00000000ffffef4f
[  518.183736] R10: ffffffffb3c98520 R11: ffffffffb3d5f488 R12: ffff8eb7447a0610
[  518.184330] R13: ffff9c494005be08 R14: ffff8eb7447a0b80 R15: ffffffffb5278f90
[  518.184946] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  518.185629] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  518.186112] CR2: 00007ff957129270 CR3: 0000000036660005 CR4: 0000000000770ef0
[  518.186723] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  518.187316] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  518.187924] PKRU: 55555554
[  518.188167] Call Trace:
[  518.188388]  <TASK>
[  518.188591] ? __warn (kernel/panic.c:677) 
[  518.188886] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  518.189253] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  518.189590] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  518.189898] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  518.190238] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  518.211012] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  518.211677] br_dev_delete (net/bridge/br_if.c:396) 
[  518.212300] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  518.213008] cleanup_net (net/core/net_namespace.c:630) 
[  518.213632] ? process_one_work (kernel/workqueue.c:2606) 
[  518.214198] process_one_work (kernel/workqueue.c:2633) 
[  518.214855] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  518.215327] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  518.215883] kthread (kernel/kthread.c:388) 
[  518.216480] ? __pfx_kthread (kernel/kthread.c:341) 
[  518.217245] ret_from_fork (arch/x86/kernel/process.c:147) 
[  518.217598] ? __pfx_kthread (kernel/kthread.c:341) 
[  518.217918] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  533.805473] ------------[ cut here ]------------
| [  533.805991] sysfs group 'bridge' not found for kobject 'br0'
| [  533.806572] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  533.807217] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  533.808631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  533.809741] Workqueue: netns cleanup_net
[  533.810303] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 533.810846] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  533.812316] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  533.812861] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffef9d
[  533.813406] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  533.813969] RBP: 0000000000000000 R08: ffffffffb3d5fbd8 R09: 00000000ffffef9d
[  533.815017] R10: ffffffffb3c98520 R11: ffffffffb3d5fbd8 R12: ffff8eb744cae610
[  533.815629] R13: ffff9c494005be08 R14: ffff8eb744caeb80 R15: ffff8eb7450c1750
[  533.816201] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  533.816882] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  533.817332] CR2: 00007ffac284e000 CR3: 0000000002d96002 CR4: 0000000000770ef0
[  533.817902] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  533.818747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  533.824315] PKRU: 55555554
[  533.830382] Call Trace:
[  533.830800]  <TASK>
[  533.831170] ? __warn (kernel/panic.c:677) 
[  533.831449] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  533.831902] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  533.832331] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  533.835120] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  533.835450] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  533.847093] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  533.858735] br_dev_delete (net/bridge/br_if.c:396) 
[  533.860703] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  533.862413] cleanup_net (net/core/net_namespace.c:630) 
[  533.863765] ? process_one_work (kernel/workqueue.c:2606) 
[  533.864898] process_one_work (kernel/workqueue.c:2633) 
[  533.865585] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  533.866937] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  533.868289] kthread (kernel/kthread.c:388) 
[  533.869558] ? __pfx_kthread (kernel/kthread.c:341) 
[  533.870406] ret_from_fork (arch/x86/kernel/process.c:147) 
[  533.870817] ? __pfx_kthread (kernel/kthread.c:341) 
[  533.871119] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  533.991403] ------------[ cut here ]------------
| [  533.991852] sysfs group 'bridge' not found for kobject 'br0'
| [  533.992322] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  533.992964] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  533.994318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  533.995208] Workqueue: netns cleanup_net
[  533.995524] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 533.995923] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  533.997336] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  533.997763] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000ffffefd1
[  533.998312] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  533.998876] RBP: 0000000000000000 R08: ffffffffb3d600b8 R09: 00000000ffffefd1
[  533.999431] R10: ffffffffb3c98520 R11: ffffffffb3d600b8 R12: ffff8eb744630610
[  534.000004] R13: ffff9c494005be08 R14: ffff8eb744630b80 R15: ffff8eb7418c1750
[  534.000689] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  534.001302] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  534.001750] CR2: 00007ffac284e000 CR3: 0000000036660005 CR4: 0000000000770ef0
[  534.003020] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  534.003566] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  534.004108] PKRU: 55555554
[  534.004323] Call Trace:
[  534.004521]  <TASK>
[  534.004754] ? __warn (kernel/panic.c:677) 
[  534.005027] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.005377] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  534.005700] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  534.005988] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  534.006308] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  534.006763] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.007112] br_dev_delete (net/bridge/br_if.c:396) 
[  534.007413] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  534.007781] cleanup_net (net/core/net_namespace.c:630) 
[  534.008074] ? process_one_work (kernel/workqueue.c:2606) 
[  534.008397] process_one_work (kernel/workqueue.c:2633) 
[  534.008807] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  534.009701] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  534.010140] kthread (kernel/kthread.c:388) 
[  534.010373] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.010889] ret_from_fork (arch/x86/kernel/process.c:147) 
[  534.011286] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.015519] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  534.155046] ------------[ cut here ]------------
| [  534.155639] sysfs group 'bridge' not found for kobject 'br0'
| [  534.156113] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  534.156890] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  534.158611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  534.160144] Workqueue: netns cleanup_net
[  534.161971] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 534.162434] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  534.164308] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  534.164929] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff005
[  534.165542] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  534.166324] RBP: 0000000000000000 R08: ffffffffb3d60598 R09: 00000000fffff005
[  534.173972] R10: ffffffffb3c98520 R11: ffffffffb3d60598 R12: ffff8eb7447a4610
[  534.174548] R13: ffff9c494005be08 R14: ffff8eb7447a4b80 R15: ffff8eb742e44550
[  534.175115] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  534.175723] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  534.176168] CR2: 00007fde35bd1000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  534.176772] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  534.177349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  534.177944] PKRU: 55555554
[  534.178177] Call Trace:
[  534.178390]  <TASK>
[  534.178586] ? __warn (kernel/panic.c:677) 
[  534.178864] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.179207] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  534.179523] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  534.179831] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  534.180156] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  534.185968] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.188800] br_dev_delete (net/bridge/br_if.c:396) 
[  534.190143] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  534.190807] cleanup_net (net/core/net_namespace.c:630) 
[  534.191409] ? process_one_work (kernel/workqueue.c:2606) 
[  534.192136] process_one_work (kernel/workqueue.c:2633) 
[  534.192662] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  534.193130] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  534.193617] kthread (kernel/kthread.c:388) 
[  534.193891] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.194342] ret_from_fork (arch/x86/kernel/process.c:147) 
[  534.194885] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.195362] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  534.338639] ------------[ cut here ]------------
| [  534.339031] sysfs group 'bridge' not found for kobject 'br0'
| [  534.339502] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  534.340287] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  534.341683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  534.342510] Workqueue: netns cleanup_net
[  534.342842] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 534.343233] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  534.344675] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  534.345091] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff039
[  534.345657] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  534.346205] RBP: 0000000000000000 R08: ffffffffb3d60a78 R09: 00000000fffff039
[  534.346751] R10: ffffffffb3c98520 R11: ffffffffb3d60a78 R12: ffff8eb7447a2610
[  534.347315] R13: ffff9c494005be08 R14: ffff8eb7447a2b80 R15: ffffffffb5278f90
[  534.347889] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  534.348513] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  534.348973] CR2: 00007fde35bd1000 CR3: 0000000036660003 CR4: 0000000000770ef0
[  534.349524] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  534.350101] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  534.351541] PKRU: 55555554
[  534.351763] Call Trace:
[  534.352068]  <TASK>
[  534.352319] ? __warn (kernel/panic.c:677) 
[  534.352654] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.353087] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  534.353502] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  534.353856] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  534.354246] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  534.354683] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  534.355151] br_dev_delete (net/bridge/br_if.c:396) 
[  534.355523] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  534.356033] cleanup_net (net/core/net_namespace.c:630) 
[  534.356420] ? process_one_work (kernel/workqueue.c:2606) 
[  534.356844] process_one_work (kernel/workqueue.c:2633) 
[  534.357251] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  534.357676] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  534.358091] kthread (kernel/kthread.c:388) 
[  534.358401] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.358908] ret_from_fork (arch/x86/kernel/process.c:147) 
[  534.359679] ? __pfx_kthread (kernel/kthread.c:341) 
[  534.360355] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  574.983764] ------------[ cut here ]------------
| [  574.984182] sysfs group 'bridge' not found for kobject 'br0'
| [  574.984702] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  574.985402] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  574.986830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  574.987448] Workqueue: netns cleanup_net
[  574.987739] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 574.988048] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  574.989145] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  574.989413] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff087
[  574.989788] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  574.990187] RBP: 0000000000000000 R08: ffffffffb3d611c8 R09: 00000000fffff087
[  574.990751] R10: ffffffffb3c98520 R11: ffffffffb3d611c8 R12: ffff8eb744634610
[  574.991215] R13: ffff9c494005be08 R14: ffff8eb744634b80 R15: ffff8eb7418c1750
[  574.991720] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  574.992434] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  574.992979] CR2: 00007ffd0044cb98 CR3: 0000000036660004 CR4: 0000000000770ef0
[  574.993644] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  574.994298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  574.994921] PKRU: 55555554
[  574.995184] Call Trace:
[  574.995410]  <TASK>
[  574.995620] ? __warn (kernel/panic.c:677) 
[  574.995923] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  574.996319] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  574.996663] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  574.996989] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  574.997345] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  574.997743] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  574.998133] br_dev_delete (net/bridge/br_if.c:396) 
[  574.998472] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  574.998822] cleanup_net (net/core/net_namespace.c:630) 
[  574.999132] ? process_one_work (kernel/workqueue.c:2606) 
[  574.999521] process_one_work (kernel/workqueue.c:2633) 
[  574.999866] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  575.000179] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  575.000543] kthread (kernel/kthread.c:388) 
[  575.000833] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.001106] ret_from_fork (arch/x86/kernel/process.c:147) 
[  575.001439] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.001754] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  575.117831] ------------[ cut here ]------------
| [  575.118332] sysfs group 'bridge' not found for kobject 'br0'
| [  575.118818] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  575.119631] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  575.121363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  575.122645] Workqueue: netns cleanup_net
[  575.123004] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 575.123494] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  575.125878] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  575.126591] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff0c1
[  575.127513] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  575.128285] RBP: 0000000000000000 R08: ffffffffb3d61738 R09: 00000000fffff0c1
[  575.128927] R10: ffffffffb3c98520 R11: ffffffffb3d61738 R12: ffff8eb744632610
[  575.129621] R13: ffff9c494005be08 R14: ffff8eb744632b80 R15: ffffffffb5278f90
[  575.130278] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  575.130847] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  575.131217] CR2: 00007ffd0044cb98 CR3: 0000000036660004 CR4: 0000000000770ef0
[  575.131589] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  575.131948] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  575.132389] PKRU: 55555554
[  575.132650] Call Trace:
[  575.132868]  <TASK>
[  575.133025] ? __warn (kernel/panic.c:677) 
[  575.133205] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.133536] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  575.133830] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  575.134185] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  575.134565] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  575.134964] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.135368] br_dev_delete (net/bridge/br_if.c:396) 
[  575.135730] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  575.136155] cleanup_net (net/core/net_namespace.c:630) 
[  575.136495] ? process_one_work (kernel/workqueue.c:2606) 
[  575.136868] process_one_work (kernel/workqueue.c:2633) 
[  575.137240] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  575.137623] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  575.138025] kthread (kernel/kthread.c:388) 
[  575.138386] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.138893] ret_from_fork (arch/x86/kernel/process.c:147) 
[  575.139373] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.139911] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  575.145948] ------------[ cut here ]------------
| [  575.146218] sysfs group 'bridge' not found for kobject 'br0'
| [  575.146537] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  575.147050] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  575.148170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  575.148952] Workqueue: netns cleanup_net
[  575.149276] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 575.149704] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  575.151244] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  575.151726] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff0f2
[  575.152419] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  575.153357] RBP: 0000000000000000 R08: ffffffffb3d61bd0 R09: 00000000fffff0f2
[  575.154015] R10: ffffffffb3c98520 R11: ffffffffb3d61bd0 R12: ffff8eb744636610
[  575.154631] R13: ffff9c494005be08 R14: ffff8eb744636b80 R15: ffffffffb5278f90
[  575.155242] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  575.155941] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  575.156453] CR2: 00007f167ba55000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  575.157123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  575.157737] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  575.158298] PKRU: 55555554
[  575.158520] Call Trace:
[  575.158756]  <TASK>
[  575.158952] ? __warn (kernel/panic.c:677) 
[  575.159213] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.159596] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  575.159884] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  575.160183] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  575.160509] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  575.160847] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.161225] br_dev_delete (net/bridge/br_if.c:396) 
[  575.161539] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  575.161931] cleanup_net (net/core/net_namespace.c:630) 
[  575.162126] ? process_one_work (kernel/workqueue.c:2606) 
[  575.162343] process_one_work (kernel/workqueue.c:2633) 
[  575.162591] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  575.162862] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  575.163105] kthread (kernel/kthread.c:388) 
[  575.163275] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.163475] ret_from_fork (arch/x86/kernel/process.c:147) 
[  575.163680] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.163883] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  575.166466] ------------[ cut here ]------------
| [  575.166717] sysfs group 'bridge' not found for kobject 'br0'
| [  575.167037] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  575.167455] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  575.168361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  575.168947] Workqueue: netns cleanup_net
[  575.169167] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 575.169413] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  575.170378] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  575.170661] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff123
[  575.171023] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  575.171383] RBP: 0000000000000000 R08: ffffffffb3d62068 R09: 00000000fffff123
[  575.171753] R10: ffffffffb3c98520 R11: ffffffffb3d62068 R12: ffff8eb7445d4610
[  575.172116] R13: ffff9c494005be08 R14: ffff8eb7445d4b80 R15: ffffffffb5278f90
[  575.172475] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  575.172891] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  575.173210] CR2: 00007f167ba55000 CR3: 0000000036660004 CR4: 0000000000770ef0
[  575.173607] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  575.173990] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  575.174354] PKRU: 55555554
[  575.174505] Call Trace:
[  575.174651]  <TASK>
[  575.174773] ? __warn (kernel/panic.c:677) 
[  575.174944] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.175186] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  575.175388] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  575.175591] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  575.175803] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  575.176041] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  575.176275] br_dev_delete (net/bridge/br_if.c:396) 
[  575.176478] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  575.176735] cleanup_net (net/core/net_namespace.c:630) 
[  575.176942] ? process_one_work (kernel/workqueue.c:2606) 
[  575.177169] process_one_work (kernel/workqueue.c:2633) 
[  575.177396] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  575.177616] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  575.177853] kthread (kernel/kthread.c:388) 
[  575.178035] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.178245] ret_from_fork (arch/x86/kernel/process.c:147) 
[  575.178451] ? __pfx_kthread (kernel/kthread.c:341) 
[  575.178662] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.843803] ------------[ cut here ]------------
| [  612.844180] sysfs group 'bridge' not found for kobject 'br0'
| [  612.844631] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.845202] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  612.846558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.847420] Workqueue: netns cleanup_net
[  612.847763] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.848186] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  612.849565] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  612.850004] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff171
[  612.850594] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  612.850992] RBP: 0000000000000000 R08: ffffffffb3d627b8 R09: 00000000fffff171
[  612.851475] R10: ffffffffb3c98520 R11: ffffffffb3d627b8 R12: ffff8eb741c88610
[  612.852037] R13: ffff9c494005be08 R14: ffff8eb741c88b80 R15: ffff8eb7418c1750
[  612.852554] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  612.853189] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.853631] CR2: 00007ffd0044cb98 CR3: 000000000444c001 CR4: 0000000000770ef0
[  612.854106] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.854649] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.855210] PKRU: 55555554
[  612.855484] Call Trace:
[  612.855690]  <TASK>
[  612.855864] ? __warn (kernel/panic.c:677) 
[  612.856163] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  612.856519] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  612.856857] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  612.857166] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  612.857497] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  612.857867] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  612.858251] br_dev_delete (net/bridge/br_if.c:396) 
[  612.858574] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  612.858943] cleanup_net (net/core/net_namespace.c:630) 
[  612.859257] ? process_one_work (kernel/workqueue.c:2606) 
[  612.859606] process_one_work (kernel/workqueue.c:2633) 
[  612.859965] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  612.860287] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  612.860660] kthread (kernel/kthread.c:388) 
[  612.860931] ? __pfx_kthread (kernel/kthread.c:341) 
[  612.861260] ret_from_fork (arch/x86/kernel/process.c:147) 
[  612.861579] ? __pfx_kthread (kernel/kthread.c:341) 
[  612.861903] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  612.979767] ------------[ cut here ]------------
| [  612.980327] sysfs group 'bridge' not found for kobject 'br0'
| [  612.980649] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  612.981402] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  612.983106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  612.984110] Workqueue: netns cleanup_net
[  612.984447] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 612.984909] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  612.986593] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  612.987103] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff1a8
[  612.987766] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  612.988451] RBP: 0000000000000000 R08: ffffffffb3d62ce0 R09: 00000000fffff1a8
[  612.989165] R10: ffffffffb3c98520 R11: ffffffffb3d62ce0 R12: ffff8eb741c8a610
[  612.989865] R13: ffff9c494005be08 R14: ffff8eb741c8ab80 R15: ffff8eb7418c5c50
[  612.990497] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  612.991238] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  612.991819] CR2: 00007fcb2ab47000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  612.992486] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  612.993149] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  612.993741] PKRU: 55555554
[  612.994002] Call Trace:
[  612.994250]  <TASK>
[  612.994456] ? __warn (kernel/panic.c:677) 
[  612.994802] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  612.995175] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  612.995370] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  612.995579] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  612.995790] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  612.996090] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  612.996431] br_dev_delete (net/bridge/br_if.c:396) 
[  612.996739] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  612.996971] cleanup_net (net/core/net_namespace.c:630) 
[  612.997163] ? process_one_work (kernel/workqueue.c:2606) 
[  612.997383] process_one_work (kernel/workqueue.c:2633) 
[  612.997604] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  612.997967] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  612.998334] kthread (kernel/kthread.c:388) 
[  612.998720] ? __pfx_kthread (kernel/kthread.c:341) 
[  612.999129] ret_from_fork (arch/x86/kernel/process.c:147) 
[  612.999330] ? __pfx_kthread (kernel/kthread.c:341) 
[  612.999731] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  613.004091] ------------[ cut here ]------------
| [  613.004542] sysfs group 'bridge' not found for kobject 'br0'
| [  613.005098] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  613.005916] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  613.007588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  613.008676] Workqueue: netns cleanup_net
[  613.009087] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 613.009573] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  613.010991] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  613.011305] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff1d9
[  613.011693] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  613.012090] RBP: 0000000000000000 R08: ffffffffb3d63178 R09: 00000000fffff1d9
[  613.012632] R10: ffffffffb3c98520 R11: ffffffffb3d63178 R12: ffff8eb7445d0610
[  613.013258] R13: ffff9c494005be08 R14: ffff8eb7445d0b80 R15: ffff8eb7418c5c50
[  613.013708] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  613.014368] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  613.014910] CR2: 00007fcb2ab47000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  613.015536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  613.016195] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  613.016869] PKRU: 55555554
[  613.017133] Call Trace:
[  613.017378]  <TASK>
[  613.017637] ? __warn (kernel/panic.c:677) 
[  613.017971] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  613.018377] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  613.018743] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  613.019112] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  613.019502] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  613.019915] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  613.020368] br_dev_delete (net/bridge/br_if.c:396) 
[  613.020733] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  613.021148] cleanup_net (net/core/net_namespace.c:630) 
[  613.021523] ? process_one_work (kernel/workqueue.c:2606) 
[  613.021924] process_one_work (kernel/workqueue.c:2633) 
[  613.022278] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  613.022667] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  613.023042] kthread (kernel/kthread.c:388) 
[  613.023415] ? __pfx_kthread (kernel/kthread.c:341) 
[  613.023719] ret_from_fork (arch/x86/kernel/process.c:147) 
[  613.024084] ? __pfx_kthread (kernel/kthread.c:341) 
[  613.024411] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  613.132843] ------------[ cut here ]------------
| [  613.133505] sysfs group 'bridge' not found for kobject 'br0'
| [  613.134152] WARNING: CPU: 3 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  613.135135] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  613.137242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  613.138879] Workqueue: netns cleanup_net
[  613.139475] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 613.140239] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  613.142978] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  613.143694] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff20d
[  613.144311] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  613.144872] RBP: 0000000000000000 R08: ffffffffb3d63658 R09: 00000000fffff20d
[  613.145416] R10: ffffffffb3c98520 R11: ffffffffb3d63658 R12: ffff8eb741c8c610
[  613.146310] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb742e40050
[  613.147045] FS:  0000000000000000(0000) GS:ffff8eb77ed80000(0000) knlGS:0000000000000000
[  613.148307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  613.149276] CR2: 00007fcb2ab47000 CR3: 0000000036660002 CR4: 0000000000770ef0
[  613.150328] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  613.151170] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  613.151961] PKRU: 55555554
[  613.152238] Call Trace:
[  613.152504]  <TASK>
[  613.152898] ? __warn (kernel/panic.c:677) 
[  613.153262] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  613.153713] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  613.154106] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  613.154487] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  613.154857] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  613.155230] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  613.155604] br_dev_delete (net/bridge/br_if.c:396) 
[  613.155925] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  613.156322] cleanup_net (net/core/net_namespace.c:630) 
[  613.156632] ? process_one_work (kernel/workqueue.c:2606) 
[  613.157019] process_one_work (kernel/workqueue.c:2633) 
[  613.157360] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  613.157870] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  613.158433] kthread (kernel/kthread.c:388) 
[  613.158880] ? __pfx_kthread (kernel/kthread.c:341) 
[  613.159362] ret_from_fork (arch/x86/kernel/process.c:147) 
[  613.159652] ? __pfx_kthread (kernel/kthread.c:341) 
[  613.159899] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  650.568943] ------------[ cut here ]------------
| [  650.569708] sysfs group 'bridge' not found for kobject 'br0'
| [  650.570559] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  650.571750] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  650.574315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  650.575931] Workqueue: netns cleanup_net
[  650.576529] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 650.577209] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  650.579070] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  650.579693] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff25b
[  650.580239] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  650.580801] RBP: 0000000000000000 R08: ffffffffb3d63da8 R09: 00000000fffff25b
[  650.581430] R10: ffffffffb3c98520 R11: ffffffffb3d63da8 R12: ffff8eb741936610
[  650.582254] R13: ffff9c494005be08 R14: ffff8eb741936b80 R15: ffff8eb7450c0050
[  650.583254] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  650.584574] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  650.585539] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[  650.586661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  650.587799] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  650.588915] PKRU: 55555554
[  650.589281] Call Trace:
[  650.589704]  <TASK>
[  650.589912] ? __warn (kernel/panic.c:677) 
[  650.590345] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.591003] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  650.591547] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  650.592031] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  650.592609] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  650.593088] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.593442] br_dev_delete (net/bridge/br_if.c:396) 
[  650.593772] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  650.594118] cleanup_net (net/core/net_namespace.c:630) 
[  650.594407] ? process_one_work (kernel/workqueue.c:2606) 
[  650.594744] process_one_work (kernel/workqueue.c:2633) 
[  650.595061] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  650.595355] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  650.595703] kthread (kernel/kthread.c:388) 
[  650.595957] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.596252] ret_from_fork (arch/x86/kernel/process.c:147) 
[  650.596551] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.596848] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  650.723871] ------------[ cut here ]------------
| [  650.724432] sysfs group 'bridge' not found for kobject 'br0'
| [  650.725076] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  650.725749] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  650.727299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  650.728195] Workqueue: netns cleanup_net
[  650.728675] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 650.729330] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  650.731291] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  650.731967] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff292
[  650.733043] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  650.734078] RBP: 0000000000000000 R08: ffffffffb3d642d0 R09: 00000000fffff292
[  650.735050] R10: ffffffffb3c98520 R11: ffffffffb3d642d0 R12: ffff8eb744caa610
[  650.735991] R13: ffff9c494005be08 R14: ffff8eb744caab80 R15: ffff8eb742e40050
[  650.736934] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  650.738063] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  650.738718] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[  650.739337] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  650.739899] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  650.740477] PKRU: 55555554
[  650.740804] Call Trace:
[  650.741144]  <TASK>
[  650.741350] ? __warn (kernel/panic.c:677) 
[  650.741658] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.742208] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  650.742774] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  650.743300] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  650.743887] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  650.744482] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.745083] br_dev_delete (net/bridge/br_if.c:396) 
[  650.745620] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  650.746223] cleanup_net (net/core/net_namespace.c:630) 
[  650.746712] ? process_one_work (kernel/workqueue.c:2606) 
[  650.747241] process_one_work (kernel/workqueue.c:2633) 
[  650.747767] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  650.748224] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  650.748737] kthread (kernel/kthread.c:388) 
[  650.749137] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.749599] ret_from_fork (arch/x86/kernel/process.c:147) 
[  650.750027] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.750466] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  650.755123] ------------[ cut here ]------------
| [  650.755688] sysfs group 'bridge' not found for kobject 'br0'
| [  650.756148] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  650.757087] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  650.759262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  650.761036] Workqueue: netns cleanup_net
[  650.761639] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 650.762401] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  650.765236] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  650.765923] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff2c3
[  650.766908] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  650.768020] RBP: 0000000000000000 R08: ffffffffb3d64768 R09: 00000000fffff2c3
[  650.769057] R10: ffffffffb3c98520 R11: ffffffffb3d64768 R12: ffff8eb741c8c610
[  650.770043] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffff8eb742e40050
[  650.770628] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  650.771370] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  650.771819] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[  650.772363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  650.772910] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  650.773447] PKRU: 55555554
[  650.773678] Call Trace:
[  650.773879]  <TASK>
[  650.774056] ? __warn (kernel/panic.c:677) 
[  650.774318] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.774658] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  650.774951] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  650.775228] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  650.775542] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  650.775882] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.776207] br_dev_delete (net/bridge/br_if.c:396) 
[  650.776492] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  650.776849] cleanup_net (net/core/net_namespace.c:630) 
[  650.777140] ? process_one_work (kernel/workqueue.c:2606) 
[  650.777464] process_one_work (kernel/workqueue.c:2633) 
[  650.777801] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  650.778087] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  650.778425] kthread (kernel/kthread.c:388) 
[  650.778689] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.778987] ret_from_fork (arch/x86/kernel/process.c:147) 
[  650.779274] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.779583] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  650.904862] ------------[ cut here ]------------
| [  650.905288] sysfs group 'bridge' not found for kobject 'br0'
| [  650.905836] WARNING: CPU: 2 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  650.906612] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  650.908255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  650.909644] Workqueue: netns cleanup_net
[  650.910144] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 650.910750] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  650.912920] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  650.913549] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff2f7
[  650.914413] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  650.915276] RBP: 0000000000000000 R08: ffffffffb3d64c48 R09: 00000000fffff2f7
[  650.916047] R10: ffffffffb3c98520 R11: ffffffffb3d64c48 R12: ffff8eb744cae610
[  650.916825] R13: ffff9c494005be08 R14: ffff8eb744caeb80 R15: ffff8eb742e42e50
[  650.917618] FS:  0000000000000000(0000) GS:ffff8eb77ed00000(0000) knlGS:0000000000000000
[  650.918461] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  650.919113] CR2: 00007ffd0044cb98 CR3: 0000000036660001 CR4: 0000000000770ef0
[  650.919879] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  650.920466] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  650.921080] PKRU: 55555554
[  650.921298] Call Trace:
[  650.921498]  <TASK>
[  650.921685] ? __warn (kernel/panic.c:677) 
[  650.921937] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.922248] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  650.922553] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  650.922833] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  650.923134] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  650.923468] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  650.923813] br_dev_delete (net/bridge/br_if.c:396) 
[  650.924105] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  650.924453] cleanup_net (net/core/net_namespace.c:630) 
[  650.924760] ? process_one_work (kernel/workqueue.c:2606) 
[  650.925093] process_one_work (kernel/workqueue.c:2633) 
[  650.925418] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  650.925729] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  650.926072] kthread (kernel/kthread.c:388) 
[  650.926330] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.926642] ret_from_fork (arch/x86/kernel/process.c:147) 
[  650.926932] ? __pfx_kthread (kernel/kthread.c:341) 
[  650.927232] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  688.647773] ------------[ cut here ]------------
| [  688.648030] sysfs group 'bridge' not found for kobject 'br0'
| [  688.648478] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  688.648912] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  688.649801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  688.650700] Workqueue: netns cleanup_net
[  688.651078] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 688.651360] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  688.652869] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  688.653489] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff345
[  688.654393] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  688.655188] RBP: 0000000000000000 R08: ffffffffb3d65398 R09: 00000000fffff345
[  688.655962] R10: ffffffffb3c98520 R11: ffffffffb3d65398 R12: ffff8eb7445d2610
[  688.656805] R13: ffff9c494005be08 R14: ffff8eb7445d2b80 R15: ffff8eb742e41750
[  688.657658] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  688.658585] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  688.659204] CR2: 000055a96ba3cdec CR3: 0000000002d96003 CR4: 0000000000770ef0
[  688.659882] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  688.660555] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  688.661269] PKRU: 55555554
[  688.661559] Call Trace:
[  688.661777]  <TASK>
[  688.661971] ? __warn (kernel/panic.c:677) 
[  688.662349] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.662717] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  688.663072] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  688.663378] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  688.663785] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  688.664023] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.664238] br_dev_delete (net/bridge/br_if.c:396) 
[  688.664461] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  688.664758] cleanup_net (net/core/net_namespace.c:630) 
[  688.665045] ? process_one_work (kernel/workqueue.c:2606) 
[  688.665342] process_one_work (kernel/workqueue.c:2633) 
[  688.665633] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  688.666014] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  688.666235] kthread (kernel/kthread.c:388) 
[  688.666403] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.666606] ret_from_fork (arch/x86/kernel/process.c:147) 
[  688.666797] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.667056] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  688.769833] ------------[ cut here ]------------
| [  688.770622] sysfs group 'bridge' not found for kobject 'br0'
| [  688.771389] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  688.772184] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  688.773729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  688.774737] Workqueue: netns cleanup_net
[  688.775158] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 688.775591] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  688.777138] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  688.777589] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff37c
[  688.778171] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  688.778535] RBP: 0000000000000000 R08: ffffffffb3d658c0 R09: 00000000fffff37c
[  688.778964] R10: ffffffffb3c98520 R11: ffffffffb3d658c0 R12: ffff8eb7445d6610
[  688.779330] R13: ffff9c494005be08 R14: ffff8eb7445d6b80 R15: ffff8eb742e42e50
[  688.779717] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  688.780128] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  688.780418] CR2: 000055a96ba3cdec CR3: 0000000002d96003 CR4: 0000000000770ef0
[  688.780807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  688.781172] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  688.781535] PKRU: 55555554
[  688.781688] Call Trace:
[  688.781820]  <TASK>
[  688.781938] ? __warn (kernel/panic.c:677) 
[  688.782117] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.782332] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  688.782526] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  688.782728] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  688.782927] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  688.783156] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.783372] br_dev_delete (net/bridge/br_if.c:396) 
[  688.783570] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  688.783807] cleanup_net (net/core/net_namespace.c:630) 
[  688.783998] ? process_one_work (kernel/workqueue.c:2606) 
[  688.784222] process_one_work (kernel/workqueue.c:2633) 
[  688.784434] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  688.784637] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  688.784934] kthread (kernel/kthread.c:388) 
[  688.785134] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.785384] ret_from_fork (arch/x86/kernel/process.c:147) 
[  688.785677] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.785956] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  688.789736] ------------[ cut here ]------------
| [  688.790155] sysfs group 'bridge' not found for kobject 'br0'
| [  688.790986] WARNING: CPU: 1 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  688.791605] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  688.793543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  688.794785] Workqueue: netns cleanup_net
[  688.795241] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 688.795559] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  688.797045] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  688.797497] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff3ad
[  688.798218] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  688.798942] RBP: 0000000000000000 R08: ffffffffb3d65d58 R09: 00000000fffff3ad
[  688.799602] R10: ffffffffb3c98520 R11: ffffffffb3d65d58 R12: ffff8eb7421ba610
[  688.800351] R13: ffff9c494005be08 R14: ffff8eb7421bab80 R15: ffff8eb742e42e50
[  688.801029] FS:  0000000000000000(0000) GS:ffff8eb77ec80000(0000) knlGS:0000000000000000
[  688.801792] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  688.802301] CR2: 000055a96ba3cdec CR3: 0000000002d96003 CR4: 0000000000770ef0
[  688.803053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  688.803729] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  688.804406] PKRU: 55555554
[  688.804707] Call Trace:
[  688.804943]  <TASK>
[  688.805185] ? __warn (kernel/panic.c:677) 
[  688.805559] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.806032] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  688.806391] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  688.806809] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  688.807070] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  688.807291] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.807510] br_dev_delete (net/bridge/br_if.c:396) 
[  688.807820] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  688.808048] cleanup_net (net/core/net_namespace.c:630) 
[  688.808243] ? process_one_work (kernel/workqueue.c:2606) 
[  688.808462] process_one_work (kernel/workqueue.c:2633) 
[  688.808680] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  688.808877] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  688.809164] kthread (kernel/kthread.c:388) 
[  688.809437] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.809793] ret_from_fork (arch/x86/kernel/process.c:147) 
[  688.810104] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.810396] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  688.958782] ------------[ cut here ]------------
| [  688.959062] sysfs group 'bridge' not found for kobject 'br0'
| [  688.959377] WARNING: CPU: 0 PID: 10 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  688.959998] Modules linked in: act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel
[  688.961230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  688.962044] Workqueue: netns cleanup_net
[  688.962293] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 688.962655] 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 d0 cd 92 b3 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 d0 cd 92 b3 	mov    $0xffffffffb392cdd0,%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)
	...
[  688.964049] RSP: 0018:ffff9c494005bd70 EFLAGS: 00010286
[  688.964484] RAX: 0000000000000000 RBX: ffffffffb35472c0 RCX: 00000000fffff3e1
[  688.965042] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  688.965619] RBP: 0000000000000000 R08: ffffffffb3d66238 R09: 00000000fffff3e1
[  688.966222] R10: ffffffffb3c98520 R11: ffffffffb3d66238 R12: ffff8eb741c8c610
[  688.966795] R13: ffff9c494005be08 R14: ffff8eb741c8cb80 R15: ffffffffb5278f90
[  688.967367] FS:  0000000000000000(0000) GS:ffff8eb77ec00000(0000) knlGS:0000000000000000
[  688.968024] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  688.968570] CR2: 00007f096366d000 CR3: 0000000036660006 CR4: 0000000000770ef0
[  688.969144] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  688.969702] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  688.970251] PKRU: 55555554
[  688.970515] Call Trace:
[  688.970764]  <TASK>
[  688.970994] ? __warn (kernel/panic.c:677) 
[  688.971278] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.971670] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[  688.972034] ? handle_bug (arch/x86/kernel/traps.c:238) 
[  688.972306] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[  688.972536] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[  688.972822] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[  688.973092] br_dev_delete (net/bridge/br_if.c:396) 
[  688.973328] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[  688.973589] cleanup_net (net/core/net_namespace.c:630) 
[  688.973872] ? process_one_work (kernel/workqueue.c:2606) 
[  688.974144] process_one_work (kernel/workqueue.c:2633) 
[  688.974400] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[  688.974622] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[  688.974906] kthread (kernel/kthread.c:388) 
[  688.975122] ? __pfx_kthread (kernel/kthread.c:341) 
[  688.975358] ret_from_fork (arch/x86/kernel/process.c:147) 
[  688.975573] ? __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
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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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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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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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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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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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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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
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