======================================
| [   33.009003] ------------[ cut here ]------------
| [   33.009284] refcount_t: underflow; use-after-free.
| [   33.009613] WARNING: CPU: 0 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [   33.010073] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   33.010816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.011442] Workqueue: netns cleanup_net
[   33.011710] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 33.012011] Code: 0b 90 90 c3 cc cc cc cc 80 3d 69 d4 67 01 00 0f 85 75 ff ff ff c6 05 5c d4 67 01 01 90 48 c7 c7 b8 37 f3 87 e8 a1 26 b4 ff 90 <0f> 0b 90 90 c3 cc cc cc cc 80 3d 3c d4 67 01 00 0f 85 4a ff ff ff
All code
========
   0:	0b 90 90 c3 cc cc    	or     -0x33333c70(%rax),%edx
   6:	cc                   	int3
   7:	cc                   	int3
   8:	80 3d 69 d4 67 01 00 	cmpb   $0x0,0x167d469(%rip)        # 0x167d478
   f:	0f 85 75 ff ff ff    	jne    0xffffffffffffff8a
  15:	c6 05 5c d4 67 01 01 	movb   $0x1,0x167d45c(%rip)        # 0x167d478
  1c:	90                   	nop
  1d:	48 c7 c7 b8 37 f3 87 	mov    $0xffffffff87f337b8,%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
[   33.013016] RSP: 0018:ffffaa3980063d78 EFLAGS: 00010286
[   33.013346] RAX: 0000000000000000 RBX: ffff9cffc351a000 RCX: 00000000ffffdfff
[   33.013749] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.014137] RBP: ffff9cffc351a610 R08: ffffffff88378508 R09: 00000000ffffdfff
[   33.014549] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc351a000
[   33.015012] R13: ffffaa3980063e08 R14: ffff9cffc351ab80 R15: ffff9cffc1c09750
[   33.015420] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   33.015856] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.016210] CR2: 000055a457550360 CR3: 000000000292e006 CR4: 0000000000770ef0
[   33.016635] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.017040] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.017427] PKRU: 55555554
[   33.017609] Call Trace:
[   33.017800]  <TASK>
[   33.017957] ? __warn (kernel/panic.c:677) 
[   33.018149] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[   33.018446] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   33.018700] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   33.018924] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   33.019154] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   33.019413] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[   33.019704] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[   33.019983] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[   33.020204] br_dev_delete (net/bridge/br_if.c:396) 
[   33.020452] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   33.020769] cleanup_net (net/core/net_namespace.c:630) 
[   33.021004] ? process_one_work (kernel/workqueue.c:2606) 
[   33.021268] process_one_work (kernel/workqueue.c:2633) 
[   33.021553] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   33.021809] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   33.022080] kthread (kernel/kthread.c:388) 
[   33.022302] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.022531] ret_from_fork (arch/x86/kernel/process.c:147) 
[   33.022768] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.023005] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   33.025876] ------------[ cut here ]------------
| [   33.026154] sysfs group 'bridge' not found for kobject 'br1'
| [   33.026497] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   33.026989] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   33.027817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.028444] Workqueue: netns cleanup_net
[   33.028684] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 33.028991] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   33.029976] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   33.030271] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   33.030692] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.031104] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   33.031552] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc351a610
[   33.031954] R13: ffffaa3980063e08 R14: ffff9cffc351ab80 R15: ffff9cffc1c09750
[   33.032352] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   33.032852] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.033195] CR2: 000055a457550360 CR3: 000000000292e006 CR4: 0000000000770ef0
[   33.033649] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.034061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.034444] PKRU: 55555554
[   33.034627] Call Trace:
[   33.034855]  <TASK>
[   33.035025] ? __warn (kernel/panic.c:677) 
[   33.035229] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.035482] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   33.035720] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   33.035963] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   33.036196] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   33.036467] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.036730] br_dev_delete (net/bridge/br_if.c:396) 
[   33.036961] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   33.037225] cleanup_net (net/core/net_namespace.c:630) 
[   33.037465] ? process_one_work (kernel/workqueue.c:2606) 
[   33.037744] process_one_work (kernel/workqueue.c:2633) 
[   33.038036] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   33.038295] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   33.038558] kthread (kernel/kthread.c:388) 
[   33.038798] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.039049] ret_from_fork (arch/x86/kernel/process.c:147) 
[   33.039335] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.039573] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   33.042474] ------------[ cut here ]------------
| [   33.042758] sysfs group 'bridge' not found for kobject 'br2'
| [   33.043101] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   33.043559] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   33.044386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.045004] Workqueue: netns cleanup_net
[   33.045243] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 33.045536] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   33.046514] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   33.046836] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   33.047244] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.047648] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   33.048056] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc59b4610
[   33.048485] R13: ffffaa3980063e08 R14: ffff9cffc59b4b80 R15: ffff9cffc1c09750
[   33.048885] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   33.049318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.049656] CR2: 000055a457550360 CR3: 000000000292e006 CR4: 0000000000770ef0
[   33.050065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.050454] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.050864] PKRU: 55555554
[   33.051050] Call Trace:
[   33.051217]  <TASK>
[   33.051365] ? __warn (kernel/panic.c:677) 
[   33.051542] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.051772] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   33.051975] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   33.052164] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   33.052412] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   33.052726] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.052996] br_dev_delete (net/bridge/br_if.c:396) 
[   33.053263] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   33.053531] cleanup_net (net/core/net_namespace.c:630) 
[   33.053778] ? process_one_work (kernel/workqueue.c:2606) 
[   33.054044] process_one_work (kernel/workqueue.c:2633) 
[   33.054307] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   33.054538] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   33.054822] kthread (kernel/kthread.c:388) 
[   33.055082] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.055317] ret_from_fork (arch/x86/kernel/process.c:147) 
[   33.055562] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.055769] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   33.250962] ------------[ cut here ]------------
| [   33.251257] sysfs group 'bridge' not found for kobject 'br1'
| [   33.251610] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   33.252059] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   33.252898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.253512] Workqueue: netns cleanup_net
[   33.253756] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 33.254050] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   33.255059] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   33.255374] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   33.255765] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.256163] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   33.256579] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc3518610
[   33.256997] R13: ffffaa3980063e08 R14: ffff9cffc3518b80 R15: ffff9cffc53a8050
[   33.257398] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   33.257850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.258188] CR2: 000055a457550360 CR3: 000000000bc60002 CR4: 0000000000770ef0
[   33.258592] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.258981] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.259391] PKRU: 55555554
[   33.259581] Call Trace:
[   33.259771]  <TASK>
[   33.259910] ? __warn (kernel/panic.c:677) 
[   33.260130] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.260403] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   33.260642] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   33.260857] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   33.261102] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   33.261373] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.261639] br_dev_delete (net/bridge/br_if.c:396) 
[   33.261864] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   33.262144] cleanup_net (net/core/net_namespace.c:630) 
[   33.262375] ? process_one_work (kernel/workqueue.c:2606) 
[   33.262624] process_one_work (kernel/workqueue.c:2633) 
[   33.262872] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   33.263113] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   33.263395] kthread (kernel/kthread.c:388) 
[   33.263603] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.263839] ret_from_fork (arch/x86/kernel/process.c:147) 
[   33.264071] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.264315] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   33.267214] ------------[ cut here ]------------
| [   33.267490] sysfs group 'bridge' not found for kobject 'br2'
| [   33.267857] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   33.268385] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   33.269242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.269910] Workqueue: netns cleanup_net
[   33.270153] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 33.270434] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   33.271425] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   33.271750] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   33.272167] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.272572] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   33.272962] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc215c610
[   33.273377] R13: ffffaa3980063e08 R14: ffff9cffc215cb80 R15: ffff9cffc53a8050
[   33.273788] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   33.274260] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.274591] CR2: 000055a457550360 CR3: 000000000bc60002 CR4: 0000000000770ef0
[   33.275000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.275413] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.275825] PKRU: 55555554
[   33.276031] Call Trace:
[   33.276207]  <TASK>
[   33.276350] ? __warn (kernel/panic.c:677) 
[   33.276586] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.276865] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   33.277151] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   33.277370] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   33.277610] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   33.277897] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   33.278190] br_dev_delete (net/bridge/br_if.c:396) 
[   33.278453] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   33.278721] cleanup_net (net/core/net_namespace.c:630) 
[   33.278944] ? process_one_work (kernel/workqueue.c:2606) 
[   33.279203] process_one_work (kernel/workqueue.c:2633) 
[   33.279495] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   33.279726] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   33.279999] kthread (kernel/kthread.c:388) 
[   33.280201] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.280436] ret_from_fork (arch/x86/kernel/process.c:147) 
[   33.280695] ? __pfx_kthread (kernel/kthread.c:341) 
[   33.280947] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   37.255973] ------------[ cut here ]------------
| [   37.256406] sysfs group 'bridge' not found for kobject 'br1'
| [   37.256939] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   37.257662] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   37.258960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.259891] Workqueue: netns cleanup_net
[   37.260198] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 37.260573] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   37.262146] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   37.262546] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   37.263133] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   37.263618] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   37.264014] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc566c610
[   37.264402] R13: ffffaa3980063e08 R14: ffff9cffc566cb80 R15: ffff9cffc2b7c550
[   37.264778] FS:  0000000000000000(0000) GS:ffff9cfffed80000(0000) knlGS:0000000000000000
[   37.265189] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.265485] CR2: 00007f920ecae000 CR3: 000000000bc60005 CR4: 0000000000770ef0
[   37.265860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.266225] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.266591] PKRU: 55555554
[   37.266744] Call Trace:
[   37.266878]  <TASK>
[   37.266997] ? __warn (kernel/panic.c:677) 
[   37.267175] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.267394] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   37.267593] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   37.267790] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   37.267995] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   37.268232] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.268454] br_dev_delete (net/bridge/br_if.c:396) 
[   37.268649] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   37.268889] cleanup_net (net/core/net_namespace.c:630) 
[   37.269083] ? process_one_work (kernel/workqueue.c:2606) 
[   37.269305] process_one_work (kernel/workqueue.c:2633) 
[   37.269519] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   37.269718] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   37.269953] kthread (kernel/kthread.c:388) 
[   37.270123] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.270323] ret_from_fork (arch/x86/kernel/process.c:147) 
[   37.270517] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.270715] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   37.273269] ------------[ cut here ]------------
| [   37.273555] sysfs group 'bridge' not found for kobject 'br2'
| [   37.273992] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   37.274441] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   37.275192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.275778] Workqueue: netns cleanup_net
[   37.275998] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 37.276249] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   37.277743] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   37.278197] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   37.278629] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   37.279183] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   37.279864] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc59e8610
[   37.280537] R13: ffffaa3980063e08 R14: ffff9cffc59e8b80 R15: ffff9cffc2b7c550
[   37.281213] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   37.281975] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.282546] CR2: 000055a455949dec CR3: 000000000bc60005 CR4: 0000000000770ef0
[   37.283254] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.283957] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.284662] PKRU: 55555554
[   37.284918] Call Trace:
[   37.285157]  <TASK>
[   37.285329] ? __warn (kernel/panic.c:677) 
[   37.285583] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.285931] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   37.286218] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   37.286487] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   37.286774] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   37.287176] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.287665] br_dev_delete (net/bridge/br_if.c:396) 
[   37.288000] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   37.288471] cleanup_net (net/core/net_namespace.c:630) 
[   37.288900] ? process_one_work (kernel/workqueue.c:2606) 
[   37.289446] process_one_work (kernel/workqueue.c:2633) 
[   37.290004] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   37.290493] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   37.291091] kthread (kernel/kthread.c:388) 
[   37.291573] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.292172] ret_from_fork (arch/x86/kernel/process.c:147) 
[   37.292706] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.293266] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   37.475933] ------------[ cut here ]------------
| [   37.476184] sysfs group 'bridge' not found for kobject 'br1'
| [   37.476496] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   37.476928] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   37.477686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.478284] Workqueue: netns cleanup_net
[   37.478500] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 37.478764] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   37.479707] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   37.479990] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   37.480367] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   37.480728] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   37.481098] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc51ca610
[   37.481461] R13: ffffaa3980063e08 R14: ffff9cffc51cab80 R15: ffff9cffc53a8050
[   37.481841] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   37.482254] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.482551] CR2: 000055a455949dec CR3: 000000000bc60005 CR4: 0000000000770ef0
[   37.482929] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.483296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.483661] PKRU: 55555554
[   37.483813] Call Trace:
[   37.483947]  <TASK>
[   37.484067] ? __warn (kernel/panic.c:677) 
[   37.484244] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.484463] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   37.484660] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   37.484854] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   37.485059] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   37.485285] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.485504] br_dev_delete (net/bridge/br_if.c:396) 
[   37.485697] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   37.485938] cleanup_net (net/core/net_namespace.c:630) 
[   37.486132] ? process_one_work (kernel/workqueue.c:2606) 
[   37.486353] process_one_work (kernel/workqueue.c:2633) 
[   37.486566] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   37.486778] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   37.487009] kthread (kernel/kthread.c:388) 
[   37.487178] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.487395] ret_from_fork (arch/x86/kernel/process.c:147) 
[   37.487595] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.487817] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   37.490346] ------------[ cut here ]------------
| [   37.490586] sysfs group 'bridge' not found for kobject 'br2'
| [   37.490908] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   37.491322] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   37.492099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.492674] Workqueue: netns cleanup_net
[   37.492884] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 37.493141] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   37.494086] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   37.494360] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   37.494722] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   37.495096] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   37.495462] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc59ea610
[   37.495830] R13: ffffaa3980063e08 R14: ffff9cffc59eab80 R15: ffff9cffc53a8050
[   37.496201] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   37.496626] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.496928] CR2: 000055a455949dec CR3: 000000000bc60005 CR4: 0000000000770ef0
[   37.497293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.497659] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.498034] PKRU: 55555554
[   37.498182] Call Trace:
[   37.498344]  <TASK>
[   37.498461] ? __warn (kernel/panic.c:677) 
[   37.498631] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.498855] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   37.499052] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   37.499240] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   37.499448] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   37.499681] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   37.499907] br_dev_delete (net/bridge/br_if.c:396) 
[   37.500099] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   37.500331] cleanup_net (net/core/net_namespace.c:630) 
[   37.500525] ? process_one_work (kernel/workqueue.c:2606) 
[   37.500748] process_one_work (kernel/workqueue.c:2633) 
[   37.500964] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   37.501164] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   37.501388] kthread (kernel/kthread.c:388) 
[   37.501558] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.501762] ret_from_fork (arch/x86/kernel/process.c:147) 
[   37.501952] ? __pfx_kthread (kernel/kthread.c:341) 
[   37.502150] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   41.798903] ------------[ cut here ]------------
| [   41.799375] sysfs group 'bridge' not found for kobject 'br1'
| [   41.799979] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   41.800779] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   41.801914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   41.802555] Workqueue: netns cleanup_net
[   41.802777] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 41.803032] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   41.804325] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   41.804798] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   41.805436] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   41.806169] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   41.806993] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc51cc610
[   41.807756] R13: ffffaa3980063e08 R14: ffff9cffc51ccb80 R15: ffff9cffc2942e50
[   41.808487] FS:  0000000000000000(0000) GS:ffff9cfffed80000(0000) knlGS:0000000000000000
[   41.809362] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.809995] CR2: 000055a455949dec CR3: 000000000bc60006 CR4: 0000000000770ef0
[   41.810750] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.811526] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.812136] PKRU: 55555554
[   41.812351] Call Trace:
[   41.812551]  <TASK>
[   41.812774] ? __warn (kernel/panic.c:677) 
[   41.813077] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   41.813412] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   41.813775] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   41.814170] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   41.814510] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   41.814926] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   41.815361] br_dev_delete (net/bridge/br_if.c:396) 
[   41.815771] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   41.816224] cleanup_net (net/core/net_namespace.c:630) 
[   41.816495] ? process_one_work (kernel/workqueue.c:2606) 
[   41.816852] process_one_work (kernel/workqueue.c:2633) 
[   41.817232] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   41.817590] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   41.818019] kthread (kernel/kthread.c:388) 
[   41.818295] ? __pfx_kthread (kernel/kthread.c:341) 
[   41.818569] ret_from_fork (arch/x86/kernel/process.c:147) 
[   41.818828] ? __pfx_kthread (kernel/kthread.c:341) 
[   41.819225] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   41.824156] ------------[ cut here ]------------
| [   41.824601] sysfs group 'bridge' not found for kobject 'br2'
| [   41.825126] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   41.825882] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   41.827183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   41.828206] Workqueue: netns cleanup_net
[   41.828555] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 41.828953] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   41.830231] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   41.830539] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   41.830937] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   41.831327] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   41.831713] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc51ce610
[   41.832125] R13: ffffaa3980063e08 R14: ffff9cffc51ceb80 R15: ffff9cffc2942e50
[   41.832502] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   41.832928] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.833227] CR2: 000055a455949dec CR3: 000000000292e003 CR4: 0000000000770ef0
[   41.833594] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.833971] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.834336] PKRU: 55555554
[   41.834482] Call Trace:
[   41.834617]  <TASK>
[   41.834768] ? __warn (kernel/panic.c:677) 
[   41.834970] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   41.835206] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   41.835421] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   41.835620] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   41.835840] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   41.836084] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   41.836313] br_dev_delete (net/bridge/br_if.c:396) 
[   41.836508] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   41.836787] cleanup_net (net/core/net_namespace.c:630) 
[   41.836982] ? process_one_work (kernel/workqueue.c:2606) 
[   41.837202] process_one_work (kernel/workqueue.c:2633) 
[   41.837417] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   41.837617] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   41.837849] kthread (kernel/kthread.c:388) 
[   41.838018] ? __pfx_kthread (kernel/kthread.c:341) 
[   41.838234] ret_from_fork (arch/x86/kernel/process.c:147) 
[   41.838426] ? __pfx_kthread (kernel/kthread.c:341) 
[   41.838625] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.019992] ------------[ cut here ]------------
| [   42.020638] sysfs group 'bridge' not found for kobject 'br1'
| [   42.021262] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.021963] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.023048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.024110] Workqueue: netns cleanup_net
[   42.024367] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.024877] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.027166] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   42.027868] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   42.028801] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.029750] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   42.030718] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc3670610
[   42.031595] R13: ffffaa3980063e08 R14: ffff9cffc3670b80 R15: ffff9cffc53a8050
[   42.032473] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   42.033370] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.033870] CR2: 00007fa526246000 CR3: 000000000bc60003 CR4: 0000000000770ef0
[   42.034415] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.034960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.035427] PKRU: 55555554
[   42.035573] Call Trace:
[   42.035707]  <TASK>
[   42.035835] ? __warn (kernel/panic.c:677) 
[   42.036030] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.036313] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.036552] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.036745] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.036952] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.037184] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.037407] br_dev_delete (net/bridge/br_if.c:396) 
[   42.037602] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.037842] cleanup_net (net/core/net_namespace.c:630) 
[   42.038043] ? process_one_work (kernel/workqueue.c:2606) 
[   42.038278] process_one_work (kernel/workqueue.c:2633) 
[   42.038505] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.038705] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.038940] kthread (kernel/kthread.c:388) 
[   42.039123] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.039326] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.039519] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.039718] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   42.042261] ------------[ cut here ]------------
| [   42.042504] sysfs group 'bridge' not found for kobject 'br2'
| [   42.042822] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   42.043249] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   42.044002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.044647] Workqueue: netns cleanup_net
[   42.044964] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 42.045306] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   42.046585] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   42.046993] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   42.047531] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   42.048073] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   42.048623] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc566e610
[   42.049162] R13: ffffaa3980063e08 R14: ffff9cffc566eb80 R15: ffff9cffc53a8050
[   42.049705] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   42.050320] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.050767] CR2: 00007fa526246000 CR3: 000000000bc60003 CR4: 0000000000770ef0
[   42.051308] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.051856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.052273] PKRU: 55555554
[   42.052419] Call Trace:
[   42.052553]  <TASK>
[   42.052670] ? __warn (kernel/panic.c:677) 
[   42.052854] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.053126] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.053407] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.053678] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.054000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.054263] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   42.054581] br_dev_delete (net/bridge/br_if.c:396) 
[   42.054876] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   42.055213] cleanup_net (net/core/net_namespace.c:630) 
[   42.055407] ? process_one_work (kernel/workqueue.c:2606) 
[   42.055675] process_one_work (kernel/workqueue.c:2633) 
[   42.055990] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.056281] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.056615] kthread (kernel/kthread.c:388) 
[   42.056874] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.057167] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.057450] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.057748] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   46.317921] ------------[ cut here ]------------
| [   46.318389] sysfs group 'bridge' not found for kobject 'br1'
| [   46.318889] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   46.319570] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   46.320827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   46.321767] Workqueue: netns cleanup_net
[   46.322041] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 46.322296] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   46.323310] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   46.323649] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   46.324240] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   46.324663] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   46.325314] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc59b6610
[   46.325980] R13: ffffaa3980063e08 R14: ffff9cffc59b6b80 R15: ffff9cffc1c0c550
[   46.326639] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   46.327438] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.328021] CR2: 00007f9402262c08 CR3: 000000000264c001 CR4: 0000000000770ef0
[   46.328747] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.329444] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.330139] PKRU: 55555554
[   46.330423] Call Trace:
[   46.330652]  <TASK>
[   46.330851] ? __warn (kernel/panic.c:677) 
[   46.331124] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.331491] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   46.331827] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   46.332156] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   46.332498] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   46.332898] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.333238] br_dev_delete (net/bridge/br_if.c:396) 
[   46.333561] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   46.333945] cleanup_net (net/core/net_namespace.c:630) 
[   46.334203] ? process_one_work (kernel/workqueue.c:2606) 
[   46.334423] process_one_work (kernel/workqueue.c:2633) 
[   46.334661] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   46.334924] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   46.335245] kthread (kernel/kthread.c:388) 
[   46.335450] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.335771] ret_from_fork (arch/x86/kernel/process.c:147) 
[   46.336019] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.336218] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   46.339007] ------------[ cut here ]------------
| [   46.339328] sysfs group 'bridge' not found for kobject 'br2'
| [   46.339755] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   46.340471] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   46.341851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   46.342916] Workqueue: netns cleanup_net
[   46.343307] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 46.343762] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   46.345495] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   46.345979] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   46.346576] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   46.347206] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   46.347836] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc1936610
[   46.348457] R13: ffffaa3980063e08 R14: ffff9cffc1936b80 R15: ffff9cffc1c0c550
[   46.349069] FS:  0000000000000000(0000) GS:ffff9cfffed80000(0000) knlGS:0000000000000000
[   46.349726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.350035] CR2: 000055a455949dec CR3: 000000000292e006 CR4: 0000000000770ef0
[   46.350455] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.350839] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.351212] PKRU: 55555554
[   46.351358] Call Trace:
[   46.351493]  <TASK>
[   46.351612] ? __warn (kernel/panic.c:677) 
[   46.351794] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.352017] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   46.352219] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   46.352408] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   46.352612] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   46.352842] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.353066] br_dev_delete (net/bridge/br_if.c:396) 
[   46.353260] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   46.353492] cleanup_net (net/core/net_namespace.c:630) 
[   46.353688] ? process_one_work (kernel/workqueue.c:2606) 
[   46.353917] process_one_work (kernel/workqueue.c:2633) 
[   46.354132] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   46.354332] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   46.354561] kthread (kernel/kthread.c:388) 
[   46.354734] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.354943] ret_from_fork (arch/x86/kernel/process.c:147) 
[   46.355136] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.355336] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   46.566106] ------------[ cut here ]------------
| [   46.566755] sysfs group 'bridge' not found for kobject 'br1'
| [   46.567506] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   46.568552] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   46.570381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   46.571641] Workqueue: netns cleanup_net
[   46.572057] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 46.572456] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   46.573882] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   46.574251] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   46.574794] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   46.575341] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   46.575710] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc1932610
[   46.576115] R13: ffffaa3980063e08 R14: ffff9cffc1932b80 R15: ffff9cffc53a9750
[   46.576567] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   46.577000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.577298] CR2: 00007fd86928e000 CR3: 000000000bc60002 CR4: 0000000000770ef0
[   46.577665] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.578060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.578440] PKRU: 55555554
[   46.578587] Call Trace:
[   46.578727]  <TASK>
[   46.578853] ? __warn (kernel/panic.c:677) 
[   46.579028] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.579250] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   46.579448] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   46.579637] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   46.579853] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   46.580080] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.580300] br_dev_delete (net/bridge/br_if.c:396) 
[   46.580493] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   46.580734] cleanup_net (net/core/net_namespace.c:630) 
[   46.580937] ? process_one_work (kernel/workqueue.c:2606) 
[   46.581157] process_one_work (kernel/workqueue.c:2633) 
[   46.581374] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   46.581574] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   46.581861] kthread (kernel/kthread.c:388) 
[   46.582071] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.582272] ret_from_fork (arch/x86/kernel/process.c:147) 
[   46.582464] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.582661] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   46.585246] ------------[ cut here ]------------
| [   46.585527] sysfs group 'bridge' not found for kobject 'br2'
| [   46.585853] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   46.586272] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   46.587024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   46.587604] Workqueue: netns cleanup_net
[   46.587825] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 46.588075] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   46.589031] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   46.589300] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   46.589663] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   46.590032] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   46.590394] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc59ec610
[   46.590760] R13: ffffaa3980063e08 R14: ffff9cffc59ecb80 R15: ffff9cffc53a9750
[   46.591125] FS:  0000000000000000(0000) GS:ffff9cfffec00000(0000) knlGS:0000000000000000
[   46.591535] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.591837] CR2: 00007f9814f3e000 CR3: 000000000bc60001 CR4: 0000000000770ef0
[   46.592203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.592566] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.592937] PKRU: 55555554
[   46.593081] Call Trace:
[   46.593217]  <TASK>
[   46.593335] ? __warn (kernel/panic.c:677) 
[   46.593511] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.593730] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   46.593937] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   46.594125] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   46.594328] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   46.594551] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   46.594780] br_dev_delete (net/bridge/br_if.c:396) 
[   46.594975] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   46.595206] cleanup_net (net/core/net_namespace.c:630) 
[   46.595398] ? process_one_work (kernel/workqueue.c:2606) 
[   46.595620] process_one_work (kernel/workqueue.c:2633) 
[   46.595840] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   46.596040] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   46.596265] kthread (kernel/kthread.c:388) 
[   46.596437] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.596635] ret_from_fork (arch/x86/kernel/process.c:147) 
[   46.596835] ? __pfx_kthread (kernel/kthread.c:341) 
[   46.597032] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   52.769921] ------------[ cut here ]------------
| [   52.770397] sysfs group 'bridge' not found for kobject 'br1'
| [   52.770951] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   52.771696] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   52.773060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   52.774193] Workqueue: netns cleanup_net
[   52.774567] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 52.775005] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   52.776676] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   52.777166] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   52.777814] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   52.778442] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   52.779019] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc1904610
[   52.779621] R13: ffffaa3980063e08 R14: ffff9cffc1904b80 R15: ffff9cffc2b78050
[   52.780262] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   52.780998] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.781468] CR2: 00007f99e4072270 CR3: 000000000bc60001 CR4: 0000000000770ef0
[   52.782109] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.782676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.783074] PKRU: 55555554
[   52.783255] Call Trace:
[   52.783437]  <TASK>
[   52.783635] ? __warn (kernel/panic.c:677) 
[   52.783902] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.784172] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   52.784448] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   52.784776] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   52.784993] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   52.785219] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.785463] br_dev_delete (net/bridge/br_if.c:396) 
[   52.785792] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   52.786207] cleanup_net (net/core/net_namespace.c:630) 
[   52.786401] ? process_one_work (kernel/workqueue.c:2606) 
[   52.786620] process_one_work (kernel/workqueue.c:2633) 
[   52.786991] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   52.787278] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   52.787698] kthread (kernel/kthread.c:388) 
[   52.787998] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.788404] ret_from_fork (arch/x86/kernel/process.c:147) 
[   52.788788] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.789159] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   52.793892] ------------[ cut here ]------------
| [   52.794334] sysfs group 'bridge' not found for kobject 'br2'
| [   52.794910] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   52.795555] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   52.796804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   52.797858] Workqueue: netns cleanup_net
[   52.798138] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 52.798601] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   52.799898] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   52.800192] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   52.800582] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   52.800964] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   52.801325] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc51ce610
[   52.801686] R13: ffffaa3980063e08 R14: ffff9cffc51ceb80 R15: ffff9cffc2b78050
[   52.802076] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   52.802486] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.802787] CR2: 00007f99e4072270 CR3: 000000000bc60001 CR4: 0000000000770ef0
[   52.803153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.803515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.803885] PKRU: 55555554
[   52.804029] Call Trace:
[   52.804162]  <TASK>
[   52.804279] ? __warn (kernel/panic.c:677) 
[   52.804453] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.804671] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   52.804891] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   52.805080] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   52.805284] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   52.805506] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.805727] br_dev_delete (net/bridge/br_if.c:396) 
[   52.805929] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   52.806158] cleanup_net (net/core/net_namespace.c:630) 
[   52.806350] ? process_one_work (kernel/workqueue.c:2606) 
[   52.806571] process_one_work (kernel/workqueue.c:2633) 
[   52.806791] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   52.806990] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   52.807216] kthread (kernel/kthread.c:388) 
[   52.807385] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.807583] ret_from_fork (arch/x86/kernel/process.c:147) 
[   52.807781] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.807978] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   52.810516] ------------[ cut here ]------------
| [   52.810801] sysfs group 'bridge' not found for kobject 'br3'
| [   52.811136] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   52.811751] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   52.812493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   52.813361] Workqueue: netns cleanup_net
[   52.813716] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 52.814147] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   52.815545] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   52.815941] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   52.816357] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   52.816931] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   52.817541] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc351e610
[   52.818292] R13: ffffaa3980063e08 R14: ffff9cffc351eb80 R15: ffff9cffc2b78050
[   52.818904] FS:  0000000000000000(0000) GS:ffff9cfffec80000(0000) knlGS:0000000000000000
[   52.819578] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.820068] CR2: 00007f99e4072270 CR3: 000000000bc60001 CR4: 0000000000770ef0
[   52.820686] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.821305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.821914] PKRU: 55555554
[   52.822148] Call Trace:
[   52.822373]  <TASK>
[   52.822554] ? __warn (kernel/panic.c:677) 
[   52.822847] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.823221] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   52.823561] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   52.823871] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   52.824210] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   52.824576] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   52.824943] br_dev_delete (net/bridge/br_if.c:396) 
[   52.825255] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   52.825639] cleanup_net (net/core/net_namespace.c:630) 
[   52.825963] ? process_one_work (kernel/workqueue.c:2606) 
[   52.826345] process_one_work (kernel/workqueue.c:2633) 
[   52.826683] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   52.826936] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   52.827180] kthread (kernel/kthread.c:388) 
[   52.827365] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.827639] ret_from_fork (arch/x86/kernel/process.c:147) 
[   52.827838] ? __pfx_kthread (kernel/kthread.c:341) 
[   52.828036] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   53.169934] ------------[ cut here ]------------
| [   53.170190] sysfs group 'bridge' not found for kobject 'br1'
| [   53.170551] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   53.171294] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   53.172379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   53.173607] Workqueue: netns cleanup_net
[   53.174038] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 53.174584] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   53.176544] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   53.177064] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   53.177862] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   53.178682] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   53.179339] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc351c610
[   53.180078] R13: ffffaa3980063e08 R14: ffff9cffc351cb80 R15: ffff9cffc53a8050
[   53.180775] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   53.181521] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.182369] CR2: 00007ffe2b33a5c8 CR3: 000000000292e006 CR4: 0000000000770ef0
[   53.182969] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.183654] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.184385] PKRU: 55555554
[   53.184603] Call Trace:
[   53.184811]  <TASK>
[   53.184987] ? __warn (kernel/panic.c:677) 
[   53.185256] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.185586] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   53.185891] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   53.186252] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   53.186761] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   53.187135] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.187611] br_dev_delete (net/bridge/br_if.c:396) 
[   53.188064] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   53.188671] cleanup_net (net/core/net_namespace.c:630) 
[   53.189165] ? process_one_work (kernel/workqueue.c:2606) 
[   53.189723] process_one_work (kernel/workqueue.c:2633) 
[   53.190294] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   53.190843] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   53.191290] kthread (kernel/kthread.c:388) 
[   53.191594] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.191941] ret_from_fork (arch/x86/kernel/process.c:147) 
[   53.192303] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.192670] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   53.197039] ------------[ cut here ]------------
| [   53.197439] sysfs group 'bridge' not found for kobject 'br2'
| [   53.197952] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   53.198617] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   53.199820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   53.200847] Workqueue: netns cleanup_net
[   53.201149] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 53.201443] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   53.203048] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   53.203467] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   53.204422] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   53.205099] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   53.205942] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc51cc610
[   53.206642] R13: ffffaa3980063e08 R14: ffff9cffc51ccb80 R15: ffff9cffc53a8050
[   53.207587] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   53.208728] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.209503] CR2: 00007ffe2b33a5c8 CR3: 000000000bc60003 CR4: 0000000000770ef0
[   53.210164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.210824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.211520] PKRU: 55555554
[   53.211787] Call Trace:
[   53.212048]  <TASK>
[   53.212243] ? __warn (kernel/panic.c:677) 
[   53.212567] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.212947] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   53.213288] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   53.213611] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   53.213937] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   53.214267] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.214624] br_dev_delete (net/bridge/br_if.c:396) 
[   53.214936] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   53.215308] cleanup_net (net/core/net_namespace.c:630) 
[   53.215502] ? process_one_work (kernel/workqueue.c:2606) 
[   53.215722] process_one_work (kernel/workqueue.c:2633) 
[   53.215953] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   53.216240] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   53.216468] kthread (kernel/kthread.c:388) 
[   53.216639] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.216846] ret_from_fork (arch/x86/kernel/process.c:147) 
[   53.217100] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.217297] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   53.220557] ------------[ cut here ]------------
| [   53.220954] kobject: '' (0000000044033943): is not initialized, yet kobject_put() is being called.
| [   53.221729] WARNING: CPU: 2 PID: 11 at lib/kobject.c:730 kobject_put (lib/kobject.c:730 (discriminator 1)) 
| [   53.222326] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   53.223563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   53.224548] Workqueue: netns cleanup_net
[   53.224904] RIP: 0010:kobject_put (lib/kobject.c:730 (discriminator 1)) 
[ 53.225272] Code: 89 ef e8 fe ad 4f ff 4d 85 e4 74 c0 4c 89 e5 f6 45 3c 01 75 a3 90 48 8b 75 00 48 89 ea 48 c7 c7 58 ce fa 87 e8 dc 42 2a ff 90 <0f> 0b 90 90 eb 88 c3 cc cc cc cc 5b be 03 00 00 00 5d 41 5c 41 5d
All code
========
   0:	89 ef                	mov    %ebp,%edi
   2:	e8 fe ad 4f ff       	call   0xffffffffff4fae05
   7:	4d 85 e4             	test   %r12,%r12
   a:	74 c0                	je     0xffffffffffffffcc
   c:	4c 89 e5             	mov    %r12,%rbp
   f:	f6 45 3c 01          	testb  $0x1,0x3c(%rbp)
  13:	75 a3                	jne    0xffffffffffffffb8
  15:	90                   	nop
  16:	48 8b 75 00          	mov    0x0(%rbp),%rsi
  1a:	48 89 ea             	mov    %rbp,%rdx
  1d:	48 c7 c7 58 ce fa 87 	mov    $0xffffffff87face58,%rdi
  24:	e8 dc 42 2a ff       	call   0xffffffffff2a4305
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	eb 88                	jmp    0xffffffffffffffb8
  30:	c3                   	ret
  31:	cc                   	int3
  32:	cc                   	int3
  33:	cc                   	int3
  34:	cc                   	int3
  35:	5b                   	pop    %rbx
  36:	be 03 00 00 00       	mov    $0x3,%esi
  3b:	5d                   	pop    %rbp
  3c:	41 5c                	pop    %r12
  3e:	41 5d                	pop    %r13

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	eb 88                	jmp    0xffffffffffffff8e
   6:	c3                   	ret
   7:	cc                   	int3
   8:	cc                   	int3
   9:	cc                   	int3
   a:	cc                   	int3
   b:	5b                   	pop    %rbx
   c:	be 03 00 00 00       	mov    $0x3,%esi
  11:	5d                   	pop    %rbp
  12:	41 5c                	pop    %r12
  14:	41 5d                	pop    %r13
[   53.226787] RSP: 0018:ffffaa3980063d50 EFLAGS: 00010286
[   53.227216] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 00000000ffffdfff
[   53.227844] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   53.228477] RBP: ffff9cffc54e2c00 R08: ffffffff88378508 R09: 00000000ffffdfff
[   53.229071] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc1f88000
[   53.229644] R13: ffffaa3980063e08 R14: ffff9cffc1f88b80 R15: ffff9cffc53a8050
[   53.230200] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   53.230844] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.231323] CR2: 00007ffe2b33a5c8 CR3: 000000000bc60003 CR4: 0000000000770ef0
[   53.231936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.232517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.233087] PKRU: 55555554
[   53.233310] Call Trace:
[   53.233458]  <TASK>
[   53.233667] ? __warn (kernel/panic.c:677) 
[   53.233960] ? kobject_put (lib/kobject.c:730 (discriminator 1)) 
[   53.234228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   53.234562] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   53.234896] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   53.235100] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   53.235323] ? kobject_put (lib/kobject.c:730 (discriminator 1)) 
[   53.235544] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[   53.235745] br_dev_delete (net/bridge/br_if.c:396) 
[   53.236005] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   53.236285] cleanup_net (net/core/net_namespace.c:630) 
[   53.236479] ? process_one_work (kernel/workqueue.c:2606) 
[   53.236844] process_one_work (kernel/workqueue.c:2633) 
[   53.237122] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   53.237321] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   53.237547] kthread (kernel/kthread.c:388) 
[   53.237716] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.237922] ret_from_fork (arch/x86/kernel/process.c:147) 
[   53.238114] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.238399] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [   53.242530] ------------[ cut here ]------------
| [   53.242984] sysfs group 'bridge' not found for kobject 'br3'
| [   53.243579] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [   53.244408] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel
[   53.245835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   53.246904] Workqueue: netns cleanup_net
[   53.247285] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 53.247780] Code: 48 89 ef 5d 41 5c e9 7a ad ff ff 48 89 ef e8 12 9b ff ff eb d1 90 49 8b 14 24 48 8b 33 48 c7 c7 a0 cd f2 87 e8 ac 67 c5 ff 90 <0f> 0b 90 90 5b 5d 41 5c c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
All code
========
   0:	48 89 ef             	mov    %rbp,%rdi
   3:	5d                   	pop    %rbp
   4:	41 5c                	pop    %r12
   6:	e9 7a ad ff ff       	jmp    0xffffffffffffad85
   b:	48 89 ef             	mov    %rbp,%rdi
   e:	e8 12 9b ff ff       	call   0xffffffffffff9b25
  13:	eb d1                	jmp    0xffffffffffffffe6
  15:	90                   	nop
  16:	49 8b 14 24          	mov    (%r12),%rdx
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 cd f2 87 	mov    $0xffffffff87f2cda0,%rdi
  24:	e8 ac 67 c5 ff       	call   0xffffffffffc567d5
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	41 5c                	pop    %r12
  32:	c3                   	ret
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)
	...

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	5b                   	pop    %rbx
   5:	5d                   	pop    %rbp
   6:	41 5c                	pop    %r12
   8:	c3                   	ret
   9:	cc                   	int3
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	66                   	data16
   e:	66                   	data16
   f:	2e                   	cs
  10:	0f                   	.byte 0xf
  11:	1f                   	(bad)
  12:	84 00                	test   %al,(%rax)
	...
[   53.249344] RSP: 0018:ffffaa3980063d70 EFLAGS: 00010286
[   53.249810] RAX: 0000000000000000 RBX: ffffffff87b472c0 RCX: 00000000ffffdfff
[   53.250418] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   53.251014] RBP: 0000000000000000 R08: ffffffff88378508 R09: 00000000ffffdfff
[   53.251656] R10: ffffffff88298520 R11: ffffffff88348520 R12: ffff9cffc1f88610
[   53.252315] R13: ffffaa3980063e08 R14: ffff9cffc1f88b80 R15: ffff9cffc53a8050
[   53.252701] FS:  0000000000000000(0000) GS:ffff9cfffed00000(0000) knlGS:0000000000000000
[   53.253139] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.253465] CR2: 00007ffe2b33a5c8 CR3: 000000000bc60003 CR4: 0000000000770ef0
[   53.253861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.254432] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.254805] PKRU: 55555554
[   53.254950] Call Trace:
[   53.255082]  <TASK>
[   53.255210] ? __warn (kernel/panic.c:677) 
[   53.255410] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.255726] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   53.256062] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   53.256375] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   53.256692] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   53.257113] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[   53.257335] br_dev_delete (net/bridge/br_if.c:396) 
[   53.257527] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[   53.257919] cleanup_net (net/core/net_namespace.c:630) 
[   53.258234] ? process_one_work (kernel/workqueue.c:2606) 
[   53.258613] process_one_work (kernel/workqueue.c:2633) 
[   53.258832] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   53.259032] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   53.259408] kthread (kernel/kthread.c:388) 
[   53.259661] ? __pfx_kthread (kernel/kthread.c:341) 
[   53.260017] ret_from_fork (arch/x86/kernel/process.c:147) 
[   53.260382] ? __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
kobject_put:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net