======================================
| # TEST: IPv4 over geneve4: PMTU exceptions                            [ OK ]
| [  233.892938][   T11] ------------[ cut here ]------------
| [ 233.893537][ T11] WARNING: CPU: 0 PID: 11 at drivers/net/geneve.c:1914 geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
| [  233.894226][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  233.895396][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  233.896096][   T11] Workqueue: netns cleanup_net
[ 233.896521][ T11] RIP: 0010:geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 233.896952][ T11] Code: 00 48 8b 83 b8 00 00 00 48 8d 98 48 ff ff ff 48 39 44 24 10 75 a5 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 eb b9 e8 d2 9d 52 d2 e9 2d fe ff ff 48 89 cf 48 89 4c 24
All code
========
   0:	00 48 8b             	add    %cl,-0x75(%rax)
   3:	83 b8 00 00 00 48 8d 	cmpl   $0xffffff8d,0x48000000(%rax)
   a:	98                   	cwtl
   b:	48 ff                	rex.W (bad)
   d:	ff                   	(bad)
   e:	ff 48 39             	decl   0x39(%rax)
  11:	44 24 10             	rex.R and $0x10,%al
  14:	75 a5                	jne    0xffffffffffffffbb
  16:	48 83 c4 20          	add    $0x20,%rsp
  1a:	5b                   	pop    %rbx
  1b:	5d                   	pop    %rbp
  1c:	41 5c                	pop    %r12
  1e:	41 5d                	pop    %r13
  20:	41 5e                	pop    %r14
  22:	41 5f                	pop    %r15
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	eb b9                	jmp    0xffffffffffffffe8
  2f:	e8 d2 9d 52 d2       	call   0xffffffffd2529e06
  34:	e9 2d fe ff ff       	jmp    0xfffffffffffffe66
  39:	48 89 cf             	mov    %rcx,%rdi
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	4c                   	rex.WR
  3f:	24                   	.byte 0x24

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	eb b9                	jmp    0xffffffffffffffbe
   5:	e8 d2 9d 52 d2       	call   0xffffffffd2529ddc
   a:	e9 2d fe ff ff       	jmp    0xfffffffffffffe3c
   f:	48 89 cf             	mov    %rcx,%rdi
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	4c                   	rex.WR
  15:	24                   	.byte 0x24
[  233.898035][   T11] RSP: 0018:ffffc900000bfbe0 EFLAGS: 00010216
[  233.898368][   T11] RAX: ffff888006384008 RBX: ffff888007238040 RCX: 1ffff1100038091e
[  233.898804][   T11] RDX: 1ffff11006ea4886 RSI: 1ffff11005cc54be RDI: ffff888001c048f0
[  233.899224][   T11] RBP: ffff888037524430 R08: ffff888001c048f8 R09: fffffbfff2fea078
[  233.899652][   T11] R10: ffffffff97f503c7 R11: ffff88802e7fc508 R12: dffffc0000000000
[  233.900093][   T11] R13: fffffbfff2bcf027 R14: ffffffff96565698 R15: ffff8880375243d0
[  233.900520][   T11] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  233.901007][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  233.901370][   T11] CR2: 00007ffe657a4528 CR3: 00000000084a4002 CR4: 00000000001706f0
[  233.901809][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  233.902235][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  233.902677][   T11] Call Trace:
[  233.902863][   T11]  <TASK>
[ 233.903025][ T11] ? __warn (kernel/panic.c:677) 
[ 233.903251][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 233.903601][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 233.903867][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 233.904102][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 233.904541][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 233.904839][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 233.905263][ T11] ? default_device_exit_batch_rtnl (net/core/dev.c:11626) 
[ 233.905716][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 233.905979][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 233.906331][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 233.906615][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 233.906881][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 233.907165][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 233.907450][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 233.907711][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 233.908016][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 233.908277][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 233.908557][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 233.908845][ T11] kthread (kernel/kthread.c:388) 
[ 233.909109][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 233.909423][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 233.909717][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 233.910041][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  347.017268][   T11] ==================================================================
| [ 347.017790][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [  347.018221][   T11] Read of size 1 at addr ffff8880073d843c by task kworker/u8:0/11
| [  347.018654][   T11]
[  347.019396][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  347.020352][   T11] Workqueue: netns cleanup_net
[  347.020745][   T11] Call Trace:
[  347.021012][   T11]  <TASK>
[ 347.021225][ T11] dump_stack_lvl (lib/dump_stack.c:107) 
[ 347.021476][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 347.021824][ T11] ? kobject_put (lib/kobject.c:729) 
[ 347.022057][ T11] print_report (mm/kasan/report.c:489) 
[ 347.022288][ T11] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) 
[ 347.022559][ T11] kasan_report (mm/kasan/report.c:603) 
[ 347.022791][ T11] ? kobject_put (lib/kobject.c:729) 
[ 347.023028][ T11] kobject_put (lib/kobject.c:729) 
[ 347.023273][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 347.023553][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 347.023809][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 347.024100][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 347.024350][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 347.024709][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 347.024968][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 347.025220][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 347.025504][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 347.025796][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 347.026086][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 347.026403][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 347.026679][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 347.026981][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 347.027309][ T11] kthread (kernel/kthread.c:388) 
[ 347.027570][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.027847][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 347.028140][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.028441][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  347.051348][   T11] ------------[ cut here ]------------
| [  347.051636][   T11] refcount_t: underflow; use-after-free.
| [ 347.052085][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [  347.052651][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  347.053946][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  347.054665][   T11] Workqueue: netns cleanup_net
[ 347.054921][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 347.055240][ T11] Code: f9 82 03 80 fb 01 0f 87 ee 02 b1 01 83 e3 01 0f 85 4d ff ff ff c6 05 9a f9 82 03 01 90 48 c7 c7 20 7a 02 95 e8 3e 05 2a ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 8c 68 a6 ff e9 b6 fe ff ff
All code
========
   0:	f9                   	stc
   1:	82                   	(bad)
   2:	03 80 fb 01 0f 87    	add    -0x78f0fe05(%rax),%eax
   8:	ee                   	out    %al,(%dx)
   9:	02 b1 01 83 e3 01    	add    0x1e38301(%rcx),%dh
   f:	0f 85 4d ff ff ff    	jne    0xffffffffffffff62
  15:	c6 05 9a f9 82 03 01 	movb   $0x1,0x382f99a(%rip)        # 0x382f9b6
  1c:	90                   	nop
  1d:	48 c7 c7 20 7a 02 95 	mov    $0xffffffff95027a20,%rdi
  24:	e8 3e 05 2a ff       	call   0xffffffffff2a0567
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 2f ff ff ff       	jmp    0xffffffffffffff62
  33:	48 89 df             	mov    %rbx,%rdi
  36:	e8 8c 68 a6 ff       	call   0xffffffffffa668c7
  3b:	e9 b6 fe ff ff       	jmp    0xfffffffffffffef6

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 2f ff ff ff       	jmp    0xffffffffffffff38
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 8c 68 a6 ff       	call   0xffffffffffa6689d
  11:	e9 b6 fe ff ff       	jmp    0xfffffffffffffecc
[  347.056338][   T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282
[  347.056671][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9231056f
[  347.057085][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  347.057548][   T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18
[  347.058011][   T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800615a000
[  347.058430][   T11] R13: ffff88800615adf8 R14: ffffc900000bfc98 R15: ffff88800615abc0
[  347.058850][   T11] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  347.059316][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  347.059669][   T11] CR2: 00007f61a76be0e0 CR3: 00000000084a4004 CR4: 00000000001706f0
[  347.060085][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  347.060494][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  347.060913][   T11] Call Trace:
[  347.061088][   T11]  <TASK>
[ 347.061243][ T11] ? __warn (kernel/panic.c:677) 
[ 347.061459][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 347.061756][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 347.061999][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 347.062246][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 347.062472][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 347.062721][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 347.062985][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 347.063215][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 347.063505][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 347.063802][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 347.064042][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 347.064288][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 347.064564][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 347.064806][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 347.065099][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 347.065359][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 347.065601][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 347.065888][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 347.066151][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 347.066393][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 347.066684][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 347.066940][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 347.067190][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 347.067574][ T11] kthread (kernel/kthread.c:388) 
[ 347.067890][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.068222][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 347.068466][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.068716][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  347.072262][   T11] ------------[ cut here ]------------
| [  347.072564][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 347.072973][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  347.073532][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  347.074681][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  347.075315][   T11] Workqueue: netns cleanup_net
[ 347.075573][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 347.075897][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  347.076906][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  347.077223][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  347.077636][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  347.078055][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  347.078469][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800615a628
[  347.078887][   T11] R13: ffff88800615adf8 R14: ffffc900000bfc98 R15: ffff88800615abc0
[  347.079299][   T11] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  347.079895][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  347.080288][   T11] CR2: 00007f61a76be0e0 CR3: 00000000084a4004 CR4: 00000000001706f0
[  347.080784][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  347.081248][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  347.081675][   T11] Call Trace:
[  347.081854][   T11]  <TASK>
[ 347.082011][ T11] ? __warn (kernel/panic.c:677) 
[ 347.082271][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 347.082529][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 347.082853][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 347.083120][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 347.083346][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 347.083613][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 347.083919][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 347.084154][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 347.084463][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 347.084748][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 347.085045][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 347.085280][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 347.085606][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 347.085963][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 347.086242][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 347.086527][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 347.086793][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 347.087066][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 347.087385][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 347.087761][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 347.088019][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 347.088298][ T11] kthread (kernel/kthread.c:388) 
[ 347.088537][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.088806][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 347.089064][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 347.089317][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  362.104881][   T11] ------------[ cut here ]------------
| [  362.105290][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 362.105732][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  362.106339][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  362.107665][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  362.108416][   T11] Workqueue: netns cleanup_net
[ 362.108713][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 362.109105][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  362.110284][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  362.110637][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  362.111150][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  362.111623][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  362.112109][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880096ca628
[  362.112523][   T11] R13: ffff8880096cadf8 R14: ffffc900000bfc98 R15: ffff8880096cabc0
[  362.112953][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  362.113415][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  362.113776][   T11] CR2: 00007feaa3b20000 CR3: 0000000035b34004 CR4: 00000000001706f0
[  362.114204][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  362.114615][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  362.115064][   T11] Call Trace:
[  362.115296][   T11]  <TASK>
[ 362.115504][ T11] ? __warn (kernel/panic.c:677) 
[ 362.115760][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 362.116083][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 362.116408][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 362.116700][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 362.116969][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 362.117261][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 362.117583][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 362.117880][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 362.118223][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 362.118493][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 362.118840][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 362.119133][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 362.119420][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 362.119721][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 362.120032][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 362.120320][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 362.120682][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 362.121008][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 362.121280][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 362.121742][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 362.122143][ T11] kthread (kernel/kthread.c:388) 
[ 362.122494][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 362.122932][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 362.123284][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 362.123647][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  376.562443][   T11] ------------[ cut here ]------------
| [  376.562825][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 376.563283][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  376.563899][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  376.565067][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  376.565883][   T11] Workqueue: netns cleanup_net
[ 376.566224][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 376.566600][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  376.567686][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  376.568069][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  376.568544][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  376.569049][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  376.569530][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009b5a628
[  376.570034][   T11] R13: ffff888009b5adf8 R14: ffffc900000bfc98 R15: ffff888009b5abc0
[  376.570548][   T11] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  376.571096][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  376.571498][   T11] CR2: 00007f4add33830d CR3: 0000000035b34006 CR4: 00000000001706f0
[  376.571980][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  376.572476][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  376.572966][   T11] Call Trace:
[  376.573178][   T11]  <TASK>
[ 376.573349][ T11] ? __warn (kernel/panic.c:677) 
[ 376.573608][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 376.573915][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 376.574231][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 376.574499][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 376.574784][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 376.575076][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 376.575392][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 376.575667][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 376.576008][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 376.576317][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 376.576628][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 376.576922][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 376.577208][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 376.577526][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 376.577797][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 376.578069][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 376.578350][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 376.578649][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 376.578920][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 376.579197][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 376.579571][ T11] kthread (kernel/kthread.c:388) 
[ 376.579848][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 376.580162][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 376.580456][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 376.580756][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  391.814258][   T11] ------------[ cut here ]------------
| [  391.814710][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 391.815212][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  391.815907][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  391.817345][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  391.818157][   T11] Workqueue: netns cleanup_net
[ 391.818501][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 391.818856][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  391.819901][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  391.820226][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  391.820640][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  391.821069][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  391.821510][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800618a628
[  391.821961][   T11] R13: ffff88800618adf8 R14: ffffc900000bfc98 R15: ffff88800618abc0
[  391.822398][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  391.822927][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  391.823299][   T11] CR2: 00007ff606576000 CR3: 0000000035b34004 CR4: 00000000001706f0
[  391.823729][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  391.824214][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  391.824652][   T11] Call Trace:
[  391.824849][   T11]  <TASK>
[ 391.825019][ T11] ? __warn (kernel/panic.c:677) 
[ 391.825250][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 391.825538][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 391.825958][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 391.826212][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 391.826460][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 391.826738][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 391.827042][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 391.827301][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 391.827591][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 391.827879][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 391.828228][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 391.828555][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 391.828905][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 391.829206][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 391.829544][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 391.829917][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 391.830268][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 391.830681][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 391.831025][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 391.831368][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 391.831763][ T11] kthread (kernel/kthread.c:388) 
[ 391.832092][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 391.832444][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 391.832780][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 391.833129][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  406.473702][   T11] ------------[ cut here ]------------
| [  406.474036][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 406.474418][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  406.474995][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  406.476173][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  406.476818][   T11] Workqueue: netns cleanup_net
[ 406.477143][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 406.477486][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  406.478548][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  406.478934][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  406.479409][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  406.479898][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  406.480387][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88803720a628
[  406.480897][   T11] R13: ffff88803720adf8 R14: ffffc900000bfc98 R15: ffff88803720abc0
[  406.481373][   T11] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  406.481910][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  406.482305][   T11] CR2: 00007ffe657a4468 CR3: 00000000098e4005 CR4: 00000000001706f0
[  406.482809][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  406.483271][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  406.483729][   T11] Call Trace:
[  406.483957][   T11]  <TASK>
[ 406.484128][ T11] ? __warn (kernel/panic.c:677) 
[ 406.484375][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 406.484677][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 406.484990][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 406.485343][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 406.485753][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 406.486134][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 406.486569][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 406.486978][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 406.487434][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 406.487852][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 406.488302][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 406.488702][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 406.489114][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 406.489541][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 406.489963][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 406.490408][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 406.490858][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 406.491285][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 406.491552][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 406.491850][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 406.492272][ T11] kthread (kernel/kthread.c:388) 
[ 406.492638][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 406.493008][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 406.493390][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 406.493811][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  421.521812][   T11] ------------[ cut here ]------------
| [  421.522170][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 421.522623][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  421.523184][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  421.524493][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  421.525278][   T11] Workqueue: netns cleanup_net
[ 421.525566][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 421.525955][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  421.527150][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  421.527528][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  421.528023][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  421.528490][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  421.528966][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800632a628
[  421.529402][   T11] R13: ffff88800632adf8 R14: ffffc900000bfc98 R15: ffff88800632abc0
[  421.529850][   T11] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  421.530341][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  421.530707][   T11] CR2: 00007fd383471270 CR3: 0000000035b34005 CR4: 00000000001706f0
[  421.531149][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  421.531569][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  421.531989][   T11] Call Trace:
[  421.532168][   T11]  <TASK>
[ 421.532325][ T11] ? __warn (kernel/panic.c:677) 
[ 421.532542][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 421.532810][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 421.533114][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 421.533364][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 421.533642][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 421.533953][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 421.534245][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 421.534503][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 421.534827][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 421.535119][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 421.535443][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 421.535776][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 421.536067][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 421.536347][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 421.536610][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 421.536909][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 421.537191][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 421.537501][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 421.537782][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 421.538042][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 421.538330][ T11] kthread (kernel/kthread.c:388) 
[ 421.538564][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 421.538836][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 421.539095][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 421.539353][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  436.079070][   T11] ------------[ cut here ]------------
| [  436.079541][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 436.080208][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  436.081030][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  436.082824][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  436.083573][   T11] Workqueue: netns cleanup_net
[ 436.083876][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 436.084253][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  436.085476][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  436.085846][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  436.086326][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  436.086807][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  436.087227][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800988a628
[  436.087641][   T11] R13: ffff88800988adf8 R14: ffffc900000bfc98 R15: ffff88800988abc0
[  436.088079][   T11] FS:  0000000000000000(0000) GS:ffff88802ea00000(0000) knlGS:0000000000000000
[  436.088543][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  436.088900][   T11] CR2: 00007f01d0ac2000 CR3: 00000000084a4001 CR4: 00000000001706f0
[  436.089587][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  436.090090][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  436.090599][   T11] Call Trace:
[  436.090795][   T11]  <TASK>
[ 436.090951][ T11] ? __warn (kernel/panic.c:677) 
[ 436.091260][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 436.091593][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 436.091954][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 436.092238][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 436.092522][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 436.092824][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 436.093119][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 436.093388][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 436.093737][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 436.094003][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 436.094335][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 436.094608][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 436.094892][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 436.095207][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 436.095505][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 436.095793][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 436.096093][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 436.096436][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 436.096698][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 436.096972][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 436.097302][ T11] kthread (kernel/kthread.c:388) 
[ 436.097544][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 436.097822][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 436.098079][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 436.098337][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  451.247578][   T11] ------------[ cut here ]------------
| [  451.247921][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 451.248310][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  451.248831][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  451.250010][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  451.250684][   T11] Workqueue: netns cleanup_net
[ 451.250958][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 451.251282][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  451.252330][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  451.252666][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  451.253097][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  451.253584][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  451.254073][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009f1a628
[  451.254580][   T11] R13: ffff888009f1adf8 R14: ffffc900000bfc98 R15: ffff888009f1abc0
[  451.255070][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  451.255726][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  451.256098][   T11] CR2: 00007fa388bda000 CR3: 0000000035b34006 CR4: 00000000001706f0
[  451.256576][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  451.257009][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  451.257532][   T11] Call Trace:
[  451.257747][   T11]  <TASK>
[ 451.257918][ T11] ? __warn (kernel/panic.c:677) 
[ 451.258173][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 451.258475][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 451.258805][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 451.259102][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 451.259380][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 451.259699][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 451.259995][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 451.260252][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 451.260577][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 451.260897][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 451.261216][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 451.261469][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 451.261751][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 451.262070][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 451.262331][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 451.262631][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 451.262975][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 451.263321][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 451.263577][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 451.263898][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 451.264220][ T11] kthread (kernel/kthread.c:388) 
[ 451.264443][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 451.264721][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 451.264963][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 451.265202][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  465.839462][   T11] ------------[ cut here ]------------
| [  465.839941][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 465.840437][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  465.841116][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  465.842563][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  465.843430][   T11] Workqueue: netns cleanup_net
[ 465.843718][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 465.844050][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  465.845188][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  465.845552][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  465.846090][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  465.846565][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  465.847109][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009cca628
[  465.847769][   T11] R13: ffff888009ccadf8 R14: ffffc900000bfc98 R15: ffff888009ccabc0
[  465.848435][   T11] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  465.849146][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  465.849706][   T11] CR2: 00007ffed1995c38 CR3: 0000000035b34006 CR4: 00000000001706f0
[  465.850367][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  465.850995][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  465.851555][   T11] Call Trace:
[  465.851784][   T11]  <TASK>
[ 465.851995][ T11] ? __warn (kernel/panic.c:677) 
[ 465.852287][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 465.852619][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 465.852982][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 465.853314][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 465.853605][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 465.854000][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 465.854338][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 465.854618][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 465.854945][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 465.855311][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 465.855646][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 465.855930][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 465.856206][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 465.856504][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 465.856789][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 465.857081][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 465.857411][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 465.857735][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 465.858049][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 465.858339][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 465.858634][ T11] kthread (kernel/kthread.c:388) 
[ 465.858879][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 465.859157][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 465.859401][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 465.859755][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  481.109449][   T11] ------------[ cut here ]------------
| [  481.109932][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 481.110346][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  481.110928][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  481.112160][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  481.112842][   T11] Workqueue: netns cleanup_net
[ 481.113139][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.113489][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  481.114555][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  481.114927][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  481.115378][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  481.115841][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  481.116307][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888004a52628
[  481.116765][   T11] R13: ffff888004a52df8 R14: ffffc900000bfc98 R15: ffff888004a52bc0
[  481.117200][   T11] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  481.117712][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  481.118110][   T11] CR2: 00007efd6d14b000 CR3: 0000000035b34001 CR4: 00000000001706f0
[  481.118562][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  481.119012][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  481.119468][   T11] Call Trace:
[  481.119696][   T11]  <TASK>
[ 481.119858][ T11] ? __warn (kernel/panic.c:677) 
[ 481.120111][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 481.120389][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.120708][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 481.121000][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 481.121270][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 481.121618][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 481.121976][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 481.122261][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.122616][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 481.122970][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 481.123430][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 481.123814][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 481.124231][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 481.124689][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 481.125099][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 481.125690][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 481.126131][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 481.126603][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 481.127019][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 481.127420][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 481.127873][ T11] kthread (kernel/kthread.c:388) 
[ 481.128198][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 481.128489][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 481.128781][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 481.129199][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  495.927758][   T11] ------------[ cut here ]------------
| [  495.928108][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 495.928488][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  495.928982][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  495.930108][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  495.930797][   T11] Workqueue: netns cleanup_net
[ 495.931056][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 495.931363][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  495.932489][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  495.932843][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  495.933444][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  495.934125][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  495.934803][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800974a628
[  495.935504][   T11] R13: ffff88800974adf8 R14: ffffc900000bfc98 R15: ffff88800974abc0
[  495.936192][   T11] FS:  0000000000000000(0000) GS:ffff88802ee00000(0000) knlGS:0000000000000000
[  495.936965][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  495.937536][   T11] CR2: 000055832ea930f0 CR3: 0000000035b34006 CR4: 00000000001706f0
[  495.938173][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  495.938813][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  495.939435][   T11] Call Trace:
[  495.939693][   T11]  <TASK>
[ 495.939958][ T11] ? __warn (kernel/panic.c:677) 
[ 495.940285][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 495.940559][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 495.940872][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 495.941141][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 495.941387][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 495.941648][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 495.941946][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 495.942209][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 495.942497][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 495.942769][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 495.943159][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 495.943485][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 495.943761][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 495.944045][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 495.944289][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 495.944559][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 495.944830][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 495.945215][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 495.945457][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 495.945719][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 495.946003][ T11] kthread (kernel/kthread.c:388) 
[ 495.946221][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 495.946464][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 495.946710][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 495.946962][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  510.992144][   T11] ------------[ cut here ]------------
| [  510.992494][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 510.992897][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  510.993410][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  510.994619][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  510.995315][   T11] Workqueue: netns cleanup_net
[ 510.995575][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 510.995890][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  510.996906][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  510.997265][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  510.997708][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  510.998166][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  510.998591][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a93a628
[  510.999062][   T11] R13: ffff88800a93adf8 R14: ffffc900000bfc98 R15: ffff88800a93abc0
[  510.999498][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  511.000021][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  511.000390][   T11] CR2: 00007fc3a5ced000 CR3: 0000000035b34002 CR4: 00000000001706f0
[  511.000839][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  511.001310][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  511.001765][   T11] Call Trace:
[  511.001974][   T11]  <TASK>
[ 511.002172][ T11] ? __warn (kernel/panic.c:677) 
[ 511.002417][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 511.002781][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 511.003215][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 511.003504][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 511.003876][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 511.004225][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 511.004630][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 511.005014][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 511.005429][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 511.005814][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 511.006230][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 511.006571][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 511.006984][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 511.007378][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 511.007782][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 511.008138][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 511.008487][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 511.008891][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 511.009207][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 511.009557][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 511.009830][ T11] kthread (kernel/kthread.c:388) 
[ 511.010046][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 511.010291][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 511.010525][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 511.010889][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  525.692085][   T11] ------------[ cut here ]------------
| [  525.692447][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 525.692913][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  525.693475][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  525.694689][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  525.695410][   T11] Workqueue: netns cleanup_net
[ 525.695757][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 525.696171][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  525.697667][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  525.698129][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  525.698634][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  525.699113][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  525.699565][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800623a628
[  525.700045][   T11] R13: ffff88800623adf8 R14: ffffc900000bfc98 R15: ffff88800623abc0
[  525.700509][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  525.701056][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  525.701430][   T11] CR2: 00007f845c6f7000 CR3: 0000000035b34003 CR4: 00000000001706f0
[  525.701925][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  525.702405][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  525.702884][   T11] Call Trace:
[  525.703075][   T11]  <TASK>
[ 525.703251][ T11] ? __warn (kernel/panic.c:677) 
[ 525.703517][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 525.703815][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 525.704104][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 525.704359][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 525.704599][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 525.704862][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 525.705156][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 525.705400][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 525.705697][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 525.705988][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 525.706301][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 525.706575][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 525.706866][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 525.707202][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 525.707476][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 525.707788][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 525.708106][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 525.708412][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 525.708688][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 525.708971][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 525.709259][ T11] kthread (kernel/kthread.c:388) 
[ 525.709498][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 525.709791][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 525.710047][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 525.710300][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  540.632146][   T11] ------------[ cut here ]------------
| [  540.632688][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 540.633232][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  540.634003][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  540.635801][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  540.636675][   T11] Workqueue: netns cleanup_net
[ 540.636974][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 540.637387][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  540.638513][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  540.638952][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  540.639491][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  540.639973][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  540.640560][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009b72628
[  540.641172][   T11] R13: ffff888009b72df8 R14: ffffc900000bfc98 R15: ffff888009b72bc0
[  540.641790][   T11] FS:  0000000000000000(0000) GS:ffff88802e600000(0000) knlGS:0000000000000000
[  540.642542][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  540.643103][   T11] CR2: 00007f568a9d7270 CR3: 0000000035b34001 CR4: 00000000001706f0
[  540.643789][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  540.644454][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  540.645089][   T11] Call Trace:
[  540.645368][   T11]  <TASK>
[ 540.645671][ T11] ? __warn (kernel/panic.c:677) 
[ 540.646050][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 540.646468][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 540.646929][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 540.647353][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 540.647754][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 540.648173][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 540.648505][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 540.648805][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 540.649165][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 540.649466][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 540.649786][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 540.650068][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 540.650357][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 540.650666][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 540.650944][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 540.651253][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 540.651559][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 540.651889][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 540.652190][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 540.652480][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 540.652816][ T11] kthread (kernel/kthread.c:388) 
[ 540.653070][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 540.653340][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 540.653616][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 540.653915][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  555.061891][   T11] ------------[ cut here ]------------
| [  555.062410][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 555.063047][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  555.063840][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  555.065521][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  555.066477][   T11] Workqueue: netns cleanup_net
[ 555.066874][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.067375][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  555.069056][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  555.069589][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  555.070263][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  555.070955][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  555.071630][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888009eb2628
[  555.072315][   T11] R13: ffff888009eb2df8 R14: ffffc900000bfc98 R15: ffff888009eb2bc0
[  555.073002][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  555.073771][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  555.074350][   T11] CR2: 000055832ea930f0 CR3: 0000000035b34005 CR4: 00000000001706f0
[  555.075056][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  555.075699][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  555.076311][   T11] Call Trace:
[  555.076569][   T11]  <TASK>
[ 555.076808][ T11] ? __warn (kernel/panic.c:677) 
[ 555.077131][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 555.077495][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.077927][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 555.078347][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 555.078723][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 555.079164][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 555.079602][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 555.080013][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.080480][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 555.080873][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 555.081292][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 555.081648][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 555.082031][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 555.082421][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 555.082798][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 555.083240][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 555.083683][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 555.084129][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 555.084497][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 555.084885][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 555.085287][ T11] kthread (kernel/kthread.c:388) 
[ 555.085607][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 555.085979][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 555.086329][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 555.086705][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  570.812047][   T11] ------------[ cut here ]------------
| [  570.812411][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 570.812813][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  570.813365][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  570.814609][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  570.815305][   T11] Workqueue: netns cleanup_net
[ 570.815564][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 570.815878][ T11] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 94 e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 94 	mov    $0xffffffff94fca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  570.816894][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  570.817225][   T11] RAX: 0000000000000000 RBX: ffffffff953be220 RCX: ffffffff9231056f
[  570.817640][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  570.818059][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  570.818505][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a1a2628
[  570.818929][   T11] R13: ffff88800a1a2df8 R14: ffffc900000bfc98 R15: ffff88800a1a2bc0
[  570.819353][   T11] FS:  0000000000000000(0000) GS:ffff88802f200000(0000) knlGS:0000000000000000
[  570.819943][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  570.820329][   T11] CR2: 00007ffe657a3d28 CR3: 000000000618a002 CR4: 00000000001706f0
[  570.820822][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  570.821272][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  570.821723][   T11] Call Trace:
[  570.821933][   T11]  <TASK>
[ 570.822118][ T11] ? __warn (kernel/panic.c:677) 
[ 570.822374][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 570.822690][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 570.823014][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 570.823275][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 570.823555][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 570.823849][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 570.824152][ T11] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 570.824429][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 570.824764][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 570.825055][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 570.825398][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 570.825651][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 570.825965][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 570.826266][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 570.826551][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 570.826854][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 570.827194][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 570.827524][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 570.827794][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 570.828091][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 570.828395][ T11] kthread (kernel/kthread.c:388) 
[ 570.828672][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 570.828940][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 570.829223][ T11] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
geneve_exit_batch_rtnl:cleanup_net:process_one_work:worker_thread
dump_stack_lvl:print_report:kasan_report:kobject_put
refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net