======================================
| # TEST: IPv4 over geneve4: PMTU exceptions                            [ OK ]
| [  230.024042][   T11] ------------[ cut here ]------------
| [ 230.024529][ T11] WARNING: CPU: 3 PID: 11 at drivers/net/geneve.c:1914 geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
| [  230.025136][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  230.026235][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  230.026879][   T11] Workqueue: netns cleanup_net
[ 230.027153][ T11] RIP: 0010:geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 230.027529][ 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 ad 42 c2 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 ad 42 c2       	call   0xffffffffc242ae06
  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 ad 42 c2       	call   0xffffffffc242addc
   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
[  230.028553][   T11] RSP: 0018:ffffc900000bfbe0 EFLAGS: 00010297
[  230.028881][   T11] RAX: ffff88800915c008 RBX: ffff888007beb3c0 RCX: 1ffff1100038091e
[  230.029312][   T11] RDX: 1ffff11000b87bc6 RSI: 1ffff11006bc54be RDI: ffff888001c048f0
[  230.029800][   T11] RBP: ffff888005c3de30 R08: ffff888001c048f8 R09: fffffbfff0fea078
[  230.030232][   T11] R10: ffffffff87f503c7 R11: ffff888035ffc508 R12: dffffc0000000000
[  230.030687][   T11] R13: fffffbfff0bcf027 R14: ffffffff86565698 R15: ffff888005c3ddd0
[  230.031151][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  230.031662][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  230.032026][   T11] CR2: 00007fb068bb90e0 CR3: 000000000d734003 CR4: 00000000001706f0
[  230.032490][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  230.032970][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  230.033427][   T11] Call Trace:
[  230.033628][   T11]  <TASK>
[ 230.033821][ T11] ? __warn (kernel/panic.c:677) 
[ 230.034097][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 230.034481][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 230.034763][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 230.035018][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 230.035296][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 230.035626][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 230.035990][ T11] ? default_device_exit_batch_rtnl (net/core/dev.c:11626) 
[ 230.036384][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 230.036663][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 230.037017][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 230.037299][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 230.037552][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 230.037839][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 230.038124][ 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) 
[ 230.038374][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 230.038677][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 230.038947][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 230.039218][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 230.039492][ T11] kthread (kernel/kthread.c:388) 
[ 230.039715][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 230.039980][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 230.040222][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 230.040471][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  341.377581][   T11] ==================================================================
| [ 341.378077][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [  341.378467][   T11] Read of size 1 at addr ffff8880062a1abc by task kworker/u8:0/11
| [  341.378943][   T11]
[  341.379657][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  341.380375][   T11] Workqueue: netns cleanup_net
[  341.380650][   T11] Call Trace:
[  341.380860][   T11]  <TASK>
[ 341.381066][ T11] dump_stack_lvl (lib/dump_stack.c:107) 
[ 341.381342][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 341.381712][ T11] ? kobject_put (lib/kobject.c:729) 
[ 341.381981][ T11] print_report (mm/kasan/report.c:489) 
[ 341.382262][ 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) 
[ 341.382572][ T11] kasan_report (mm/kasan/report.c:603) 
[ 341.382811][ T11] ? kobject_put (lib/kobject.c:729) 
[ 341.383073][ T11] kobject_put (lib/kobject.c:729) 
[ 341.383345][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 341.383624][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 341.383909][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 341.384233][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 341.384507][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 341.384819][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 341.385119][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 341.385414][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 341.385734][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 341.386014][ 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) 
[ 341.386254][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 341.386538][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 341.386780][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 341.387035][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 341.387308][ T11] kthread (kernel/kthread.c:388) 
[ 341.387523][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.387769][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 341.388007][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.388255][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  341.410481][   T11] ------------[ cut here ]------------
| [  341.410886][   T11] refcount_t: underflow; use-after-free.
| [ 341.411372][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [  341.412091][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  341.413823][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  341.414502][   T11] Workqueue: netns cleanup_net
[ 341.414763][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 341.415102][ 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 85 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 85 	mov    $0xffffffff85027a20,%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
[  341.416125][   T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282
[  341.416447][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8231056f
[  341.416864][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  341.417287][   T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18
[  341.417827][   T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff888006142000
[  341.418458][   T11] R13: ffff888006142df8 R14: ffffc900000bfc98 R15: ffff888006142bc0
[  341.419087][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  341.419780][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  341.420305][   T11] CR2: 00005631f04dae78 CR3: 000000000d734004 CR4: 00000000001706f0
[  341.420942][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  341.421558][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  341.422122][   T11] Call Trace:
[  341.422358][   T11]  <TASK>
[ 341.422568][ T11] ? __warn (kernel/panic.c:677) 
[ 341.422838][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 341.423381][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 341.423742][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 341.424114][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 341.424380][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 341.424650][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 341.424942][ 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) 
[ 341.425211][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 341.425570][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 341.425881][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 341.426150][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 341.426404][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 341.426686][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 341.426932][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 341.427231][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 341.427500][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 341.427750][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 341.428110][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 341.428381][ 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) 
[ 341.428624][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 341.428914][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 341.429161][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 341.429416][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 341.429721][ T11] kthread (kernel/kthread.c:388) 
[ 341.430010][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.430284][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 341.430549][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.430838][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  341.434368][   T11] ------------[ cut here ]------------
| [  341.434696][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 341.435230][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  341.435796][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  341.436935][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  341.437571][   T11] Workqueue: netns cleanup_net
[ 341.437825][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 341.438153][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  341.439387][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  341.439773][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  341.440430][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  341.440935][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  341.441443][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888006142628
[  341.441917][   T11] R13: ffff888006142df8 R14: ffffc900000bfc98 R15: ffff888006142bc0
[  341.442399][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  341.443047][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  341.443456][   T11] CR2: 00005631f04dae78 CR3: 000000000d734004 CR4: 00000000001706f0
[  341.443983][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  341.444598][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  341.445107][   T11] Call Trace:
[  341.445303][   T11]  <TASK>
[ 341.445464][ T11] ? __warn (kernel/panic.c:677) 
[ 341.445733][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 341.446063][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 341.446377][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 341.446658][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 341.447031][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 341.447314][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 341.447647][ 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) 
[ 341.447959][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 341.448368][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 341.448668][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 341.448962][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 341.449200][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 341.449498][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 341.449767][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 341.450031][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 341.450304][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 341.450603][ 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) 
[ 341.450880][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 341.451253][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 341.451561][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 341.451842][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 341.452251][ T11] kthread (kernel/kthread.c:388) 
[ 341.452587][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.452878][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 341.453255][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 341.453533][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  356.264396][   T11] ------------[ cut here ]------------
| [  356.264776][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 356.265383][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  356.265993][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  356.267151][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  356.267832][   T11] Workqueue: netns cleanup_net
[ 356.268100][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 356.268468][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  356.269732][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  356.270190][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  356.270789][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  356.271368][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  356.271975][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800968a628
[  356.272570][   T11] R13: ffff88800968adf8 R14: ffffc900000bfc98 R15: ffff88800968abc0
[  356.273161][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  356.273789][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  356.274300][   T11] CR2: 00007fb068bb90e0 CR3: 000000000d734002 CR4: 00000000001706f0
[  356.274908][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  356.275488][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  356.276064][   T11] Call Trace:
[  356.276327][   T11]  <TASK>
[ 356.276533][ T11] ? __warn (kernel/panic.c:677) 
[ 356.276878][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 356.277247][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 356.277649][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 356.277956][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 356.278241][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 356.278530][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 356.278836][ 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) 
[ 356.279129][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 356.279457][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 356.279728][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 356.280046][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 356.280331][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 356.280623][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 356.280922][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 356.281210][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 356.281528][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 356.281829][ 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) 
[ 356.282109][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 356.282443][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 356.282764][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 356.283062][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 356.283372][ T11] kthread (kernel/kthread.c:388) 
[ 356.283623][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 356.283938][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 356.284224][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 356.284496][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  369.978103][   T11] ------------[ cut here ]------------
| [  369.978465][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 369.978924][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  369.979423][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  369.980697][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  369.981361][   T11] Workqueue: netns cleanup_net
[ 369.981635][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.981959][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  369.983105][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  369.983464][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  369.984046][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  369.984639][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  369.985224][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800830a628
[  369.985843][   T11] R13: ffff88800830adf8 R14: ffffc900000bfc98 R15: ffff88800830abc0
[  369.986444][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  369.987192][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  369.987687][   T11] CR2: 00007ffc90da4468 CR3: 0000000011054003 CR4: 00000000001706f0
[  369.988337][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  369.988966][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  369.989521][   T11] Call Trace:
[  369.989759][   T11]  <TASK>
[ 369.989970][ T11] ? __warn (kernel/panic.c:677) 
[ 369.990277][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.990567][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 369.990813][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 369.991061][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 369.991315][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 369.991643][ 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) 
[ 369.991911][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 369.992193][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 369.992452][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 369.992761][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 369.993065][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 369.993331][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 369.993599][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 369.993992][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 369.994265][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 369.994536][ 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) 
[ 369.994778][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 369.995068][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 369.995314][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 369.995601][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 369.995981][ T11] kthread (kernel/kthread.c:388) 
[ 369.996206][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.996460][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 369.996778][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 369.997172][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  384.838295][   T11] ------------[ cut here ]------------
| [  384.838619][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 384.839009][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  384.839509][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  384.840858][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  384.841757][   T11] Workqueue: netns cleanup_net
[ 384.842162][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 384.842563][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  384.843900][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  384.844238][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  384.844669][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  384.845087][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  384.845500][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880093d2628
[  384.845967][   T11] R13: ffff8880093d2df8 R14: ffffc900000bfc98 R15: ffff8880093d2bc0
[  384.846447][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  384.847021][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  384.847408][   T11] CR2: 00007f4a6174d000 CR3: 000000000d734003 CR4: 00000000001706f0
[  384.847907][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  384.848355][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  384.848833][   T11] Call Trace:
[  384.849029][   T11]  <TASK>
[ 384.849216][ T11] ? __warn (kernel/panic.c:677) 
[ 384.849461][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 384.849737][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 384.850105][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 384.850372][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 384.850628][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 384.850911][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 384.851215][ 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) 
[ 384.851482][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 384.851804][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 384.852077][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 384.852413][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 384.852678][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 384.852974][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 384.853299][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 384.853627][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 384.853987][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 384.854266][ 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) 
[ 384.854513][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 384.854802][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 384.855055][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 384.855311][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 384.855579][ T11] kthread (kernel/kthread.c:388) 
[ 384.855797][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 384.856044][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 384.856285][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 384.856536][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  399.134174][   T11] ------------[ cut here ]------------
| [  399.134521][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 399.134953][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  399.135525][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  399.136771][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  399.137480][   T11] Workqueue: netns cleanup_net
[ 399.137770][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 399.138148][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  399.139427][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  399.139861][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  399.140382][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  399.140951][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  399.141465][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880092d2628
[  399.142033][   T11] R13: ffff8880092d2df8 R14: ffffc900000bfc98 R15: ffff8880092d2bc0
[  399.142561][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  399.143126][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  399.143527][   T11] CR2: 00007ffc90da4468 CR3: 00000000108de004 CR4: 00000000001706f0
[  399.144068][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  399.144529][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  399.145078][   T11] Call Trace:
[  399.145280][   T11]  <TASK>
[ 399.145488][ T11] ? __warn (kernel/panic.c:677) 
[ 399.145777][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 399.146076][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 399.146446][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 399.146781][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 399.147075][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 399.147410][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 399.147764][ 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) 
[ 399.148023][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 399.148333][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 399.148617][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 399.148943][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 399.149215][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 399.149488][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 399.149778][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 399.150074][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 399.150391][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 399.150774][ 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) 
[ 399.151105][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 399.151457][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 399.151788][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 399.152106][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 399.152453][ T11] kthread (kernel/kthread.c:388) 
[ 399.152720][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 399.153051][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 399.153352][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 399.153686][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  414.119132][   T11] ------------[ cut here ]------------
| [  414.119477][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 414.119975][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  414.120563][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  414.121849][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  414.122520][   T11] Workqueue: netns cleanup_net
[ 414.122785][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 414.123122][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  414.124337][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  414.124750][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  414.125304][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  414.125789][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  414.126271][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888011352628
[  414.126767][   T11] R13: ffff888011352df8 R14: ffffc900000bfc98 R15: ffff888011352bc0
[  414.127259][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  414.127820][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  414.128225][   T11] CR2: 00007f98de82a270 CR3: 000000000d734002 CR4: 00000000001706f0
[  414.128693][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  414.129254][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  414.129763][   T11] Call Trace:
[  414.130006][   T11]  <TASK>
[ 414.130216][ T11] ? __warn (kernel/panic.c:677) 
[ 414.130464][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 414.130716][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 414.131006][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 414.131255][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 414.131486][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 414.131734][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 414.132009][ 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) 
[ 414.132256][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 414.132574][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 414.132882][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 414.133225][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 414.133491][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 414.133756][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 414.134045][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 414.134311][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 414.134597][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 414.134884][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 414.135189][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 414.135451][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 414.135709][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 414.135995][ T11] kthread (kernel/kthread.c:388) 
[ 414.136227][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 414.136476][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 414.136720][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 414.136968][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  428.377552][   T11] ------------[ cut here ]------------
| [  428.377915][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 428.378366][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  428.378979][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  428.380352][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  428.381075][   T11] Workqueue: netns cleanup_net
[ 428.381357][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 428.381666][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  428.382801][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  428.383161][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  428.383640][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  428.384098][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  428.384567][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800f11a628
[  428.385013][   T11] R13: ffff88800f11adf8 R14: ffffc900000bfc98 R15: ffff88800f11abc0
[  428.385568][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  428.386091][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  428.386438][   T11] CR2: 00007fb6947b2000 CR3: 000000000d734001 CR4: 00000000001706f0
[  428.386880][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  428.387346][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  428.387789][   T11] Call Trace:
[  428.388004][   T11]  <TASK>
[ 428.388185][ T11] ? __warn (kernel/panic.c:677) 
[ 428.388407][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 428.388665][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 428.388986][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 428.389251][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 428.389490][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 428.389749][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 428.390053][ 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) 
[ 428.390318][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 428.390688][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 428.391008][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 428.391310][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 428.391567][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 428.391837][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 428.392134][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 428.392392][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 428.392681][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 428.392987][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 428.393295][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 428.393555][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 428.393822][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 428.394130][ T11] kthread (kernel/kthread.c:388) 
[ 428.394352][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 428.394614][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 428.394870][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 428.395129][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  443.387159][   T11] ------------[ cut here ]------------
| [  443.387480][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 443.387866][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  443.388371][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  443.389644][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  443.390391][   T11] Workqueue: netns cleanup_net
[ 443.390711][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 443.391055][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  443.392245][   T11] RSP: 0000:ffffc900000bfba0 EFLAGS: 00010282
[  443.392613][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  443.393139][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  443.393661][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  443.394190][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800726a628
[  443.394685][   T11] R13: ffff88800726adf8 R14: ffffc900000bfc98 R15: ffff88800726abc0
[  443.395208][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  443.395749][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  443.396192][   T11] CR2: 00007fb5863e60d0 CR3: 000000000d734004 CR4: 00000000001706f0
[  443.396675][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  443.397193][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  443.397692][   T11] Call Trace:
[  443.397930][   T11]  <TASK>
[ 443.398140][ T11] ? __warn (kernel/panic.c:677) 
[ 443.398385][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 443.398687][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 443.399041][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 443.399292][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 443.399529][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 443.399779][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 443.400056][ 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) 
[ 443.400296][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 443.400573][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 443.400822][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 443.401109][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 443.401350][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 443.401606][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 443.401870][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 443.402125][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 443.402437][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 443.402749][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 443.403098][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 443.403399][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 443.403714][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 443.404210][ T11] kthread (kernel/kthread.c:388) 
[ 443.404575][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 443.405027][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 443.405422][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 443.405870][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  458.168312][   T11] ------------[ cut here ]------------
| [  458.168708][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 458.169143][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  458.169677][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  458.170961][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  458.171709][   T11] Workqueue: netns cleanup_net
[ 458.172042][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 458.172409][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  458.173551][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  458.173911][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  458.174335][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  458.174755][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  458.175211][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880109fa628
[  458.175644][   T11] R13: ffff8880109fadf8 R14: ffffc900000bfc98 R15: ffff8880109fabc0
[  458.176112][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  458.176662][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  458.177054][   T11] CR2: 00007fde3b272000 CR3: 000000000d734004 CR4: 00000000001706f0
[  458.177515][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  458.178008][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  458.178479][   T11] Call Trace:
[  458.178687][   T11]  <TASK>
[ 458.178857][ T11] ? __warn (kernel/panic.c:677) 
[ 458.179108][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 458.179396][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 458.179699][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 458.179974][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 458.180214][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 458.180489][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 458.180800][ 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) 
[ 458.181063][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 458.181359][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 458.181632][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 458.181935][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 458.182178][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 458.182440][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 458.182743][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 458.183012][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 458.183324][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 458.183621][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 458.183941][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 458.184196][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 458.184478][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 458.184750][ T11] kthread (kernel/kthread.c:388) 
[ 458.185014][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 458.185298][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 458.185552][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 458.185806][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  473.060347][   T11] ------------[ cut here ]------------
| [  473.060783][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 473.061190][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  473.061805][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  473.063170][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  473.063848][   T11] Workqueue: netns cleanup_net
[ 473.064164][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 473.064491][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  473.065575][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  473.065927][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  473.066420][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  473.066957][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  473.067468][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880109ea628
[  473.067978][   T11] R13: ffff8880109eadf8 R14: ffffc900000bfc98 R15: ffff8880109eabc0
[  473.068502][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  473.069055][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  473.069490][   T11] CR2: 00007fb068bb90e0 CR3: 000000000d734002 CR4: 00000000001706f0
[  473.070021][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  473.070605][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  473.071156][   T11] Call Trace:
[  473.071364][   T11]  <TASK>
[ 473.071543][ T11] ? __warn (kernel/panic.c:677) 
[ 473.071793][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 473.072104][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 473.072409][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 473.072675][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 473.072968][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 473.073341][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 473.073673][ 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) 
[ 473.074011][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 473.074341][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 473.074699][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 473.075139][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 473.075590][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 473.075982][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 473.076383][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 473.076758][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 473.077188][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 473.077593][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 473.078043][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 473.078465][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 473.078920][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 473.079330][ T11] kthread (kernel/kthread.c:388) 
[ 473.079654][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 473.080031][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 473.080393][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 473.080757][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  487.191042][   T11] ------------[ cut here ]------------
| [  487.191465][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 487.191840][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  487.192334][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  487.193701][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  487.194548][   T11] Workqueue: netns cleanup_net
[ 487.194899][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 487.195345][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  487.196780][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  487.197302][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  487.197922][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  487.198518][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  487.199122][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800794a628
[  487.199710][   T11] R13: ffff88800794adf8 R14: ffffc900000bfc98 R15: ffff88800794abc0
[  487.200311][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  487.200961][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  487.201471][   T11] CR2: 00007ffc90da4468 CR3: 0000000006f16001 CR4: 00000000001706f0
[  487.201931][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  487.202404][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  487.202861][   T11] Call Trace:
[  487.203044][   T11]  <TASK>
[ 487.203244][ T11] ? __warn (kernel/panic.c:677) 
[ 487.203483][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 487.203771][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 487.204096][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 487.204377][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 487.204632][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 487.204923][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 487.205238][ 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) 
[ 487.205503][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 487.205804][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 487.206096][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 487.206416][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 487.206693][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 487.206970][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 487.207269][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 487.207560][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 487.207832][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 487.208103][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 487.208387][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 487.208629][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 487.208880][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 487.209157][ T11] kthread (kernel/kthread.c:388) 
[ 487.209415][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 487.209688][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 487.209975][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 487.210267][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  501.756952][   T11] ------------[ cut here ]------------
| [  501.757330][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 501.757760][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  501.758297][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  501.760207][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  501.760919][   T11] Workqueue: netns cleanup_net
[ 501.761223][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.761588][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  501.762691][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  501.763095][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  501.763592][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  501.764092][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  501.764561][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800979a628
[  501.765045][   T11] R13: ffff88800979adf8 R14: ffffc900000bfc98 R15: ffff88800979abc0
[  501.765536][   T11] FS:  0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000
[  501.766078][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.766476][   T11] CR2: 00007f349ea4c270 CR3: 0000000005eb4001 CR4: 00000000001706f0
[  501.766976][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  501.767461][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  501.767956][   T11] Call Trace:
[  501.768187][   T11]  <TASK>
[ 501.768367][ T11] ? __warn (kernel/panic.c:677) 
[ 501.768669][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 501.768953][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.769228][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 501.769471][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 501.769719][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 501.769974][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 501.770257][ 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) 
[ 501.770582][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 501.770999][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 501.771261][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 501.771572][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 501.771876][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 501.772188][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 501.772494][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 501.772808][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 501.773250][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 501.773574][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 501.773953][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 501.774230][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 501.774542][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 501.774857][ T11] kthread (kernel/kthread.c:388) 
[ 501.775108][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 501.775413][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 501.775683][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 501.775960][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  516.227509][   T11] ------------[ cut here ]------------
| [  516.227822][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 516.228263][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  516.228873][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  516.230235][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  516.231048][   T11] Workqueue: netns cleanup_net
[ 516.231310][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 516.231624][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  516.232648][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  516.233032][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  516.233512][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  516.234012][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  516.234508][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff888011c82628
[  516.234967][   T11] R13: ffff888011c82df8 R14: ffffc900000bfc98 R15: ffff888011c82bc0
[  516.235469][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  516.236008][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  516.236426][   T11] CR2: 00007fc06831b000 CR3: 0000000004962002 CR4: 00000000001706f0
[  516.236936][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  516.237431][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  516.237950][   T11] Call Trace:
[  516.238144][   T11]  <TASK>
[ 516.238346][ T11] ? __warn (kernel/panic.c:677) 
[ 516.238613][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 516.238910][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 516.239236][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 516.239528][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 516.239800][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 516.240092][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 516.240441][ 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) 
[ 516.240688][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 516.241045][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 516.241320][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 516.241648][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 516.241931][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 516.242203][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 516.242462][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 516.242716][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 516.243013][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 516.243276][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 516.243558][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 516.243800][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 516.244079][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 516.244404][ T11] kthread (kernel/kthread.c:388) 
[ 516.244685][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 516.244974][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 516.245277][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 516.245568][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  530.549175][   T11] ------------[ cut here ]------------
| [  530.549547][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 530.549955][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  530.550502][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  530.551657][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  530.552323][   T11] Workqueue: netns cleanup_net
[ 530.552591][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 530.552928][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  530.553963][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  530.554294][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  530.554723][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  530.555160][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  530.555583][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800690a628
[  530.556013][   T11] R13: ffff88800690adf8 R14: ffffc900000bfc98 R15: ffff88800690abc0
[  530.556439][   T11] FS:  0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000
[  530.556922][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  530.557330][   T11] CR2: 00005631efa75dec CR3: 0000000011f2a006 CR4: 00000000001706f0
[  530.557780][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  530.558203][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  530.558623][   T11] Call Trace:
[  530.558800][   T11]  <TASK>
[ 530.558966][ T11] ? __warn (kernel/panic.c:677) 
[ 530.559186][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 530.559449][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 530.559725][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 530.559975][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 530.560206][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 530.560453][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 530.560721][ 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) 
[ 530.560965][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 530.561241][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 530.561498][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 530.561782][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 530.562037][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 530.562286][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 530.562557][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 530.562816][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 530.563112][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 530.563386][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 530.563674][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 530.563926][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 530.564192][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 530.564470][ T11] kthread (kernel/kthread.c:388) 
[ 530.564693][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 530.564954][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 530.565250][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 530.565553][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  544.169126][   T11] ------------[ cut here ]------------
| [  544.169458][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 544.169824][ T11] WARNING: CPU: 2 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  544.170316][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  544.171441][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  544.172091][   T11] Workqueue: netns cleanup_net
[ 544.172372][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 544.172719][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  544.173845][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  544.174228][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  544.174672][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  544.175143][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  544.175633][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880119ca628
[  544.176096][   T11] R13: ffff8880119cadf8 R14: ffffc900000bfc98 R15: ffff8880119cabc0
[  544.176573][   T11] FS:  0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000
[  544.177071][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  544.177417][   T11] CR2: 00007ffc90da4468 CR3: 0000000010a70001 CR4: 00000000001706f0
[  544.177873][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  544.178317][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  544.178787][   T11] Call Trace:
[  544.178987][   T11]  <TASK>
[ 544.179155][ T11] ? __warn (kernel/panic.c:677) 
[ 544.179391][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 544.179693][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 544.180009][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 544.180272][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 544.180519][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 544.180785][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 544.181082][ 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) 
[ 544.181320][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 544.181598][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 544.181846][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 544.182129][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 544.182369][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 544.182618][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 544.182887][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 544.183141][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 544.183411][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 544.183677][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 544.183966][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 544.184210][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 544.184466][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 544.184763][ T11] kthread (kernel/kthread.c:388) 
[ 544.184992][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 544.185255][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 544.185520][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 544.185779][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  558.311568][   T11] ------------[ cut here ]------------
| [  558.311943][   T11] sysfs group 'bridge' not found for kobject 'br0'
| [ 558.312350][ T11] WARNING: CPU: 3 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  558.313001][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  558.314332][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  558.315285][   T11] Workqueue: netns cleanup_net
[ 558.315658][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 558.316025][ 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 84 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 84 	mov    $0xffffffff84fca7a0,%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
[  558.317167][   T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282
[  558.317538][   T11] RAX: 0000000000000000 RBX: ffffffff853be220 RCX: ffffffff8231056f
[  558.318004][   T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  558.318448][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19
[  558.318898][   T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880068c2628
[  558.319330][   T11] R13: ffff8880068c2df8 R14: ffffc900000bfc98 R15: ffff8880068c2bc0
[  558.319776][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  558.320308][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  558.320701][   T11] CR2: 00005631efa75dec CR3: 00000000063f2001 CR4: 00000000001706f0
[  558.321175][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  558.321618][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  558.322045][   T11] Call Trace:
[  558.322246][   T11]  <TASK>
[ 558.322414][ T11] ? __warn (kernel/panic.c:677) 
[ 558.322657][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 558.322953][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 558.323247][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 558.323520][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 558.323773][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 558.324044][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 558.324330][ 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) 
[ 558.324644][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 558.324929][ T11] br_dev_delete (net/bridge/br_if.c:396) 
[ 558.325180][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 558.325513][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 558.325799][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 558.326100][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 558.326425][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 558.326684][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 558.326995][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 558.327307][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 558.327716][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 558.328079][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 558.328445][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 558.328837][ T11] kthread (kernel/kthread.c:388) 
[ 558.329207][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 558.329595][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 558.329958][ 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