======================================
| 0
| xx__-> [  230.645528][ T2582] ------------[ cut here ]------------
| [ 230.646578][ T2582] WARNING: CPU: 3 PID: 2582 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [  230.647160][ T2582] Modules linked in: act_gact cls_flower vxlan sch_fq act_mirred cls_matchall ip6_gre gre sch_ingress [last unloaded: test_bpf]
[  230.648605][ T2582] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 230.648967][ T2582] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 230.649305][ T2582] Code: 00 00 8b 05 97 05 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 fa fd 9b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 97 05 bc 02    	mov    0x2bc0597(%rip),%eax        # 0x2bc059f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa fd 9b 00       	call   0x9bfe1b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[  230.650505][ T2582] RSP: 0018:ffffc9000487f140 EFLAGS: 00010246
[  230.650895][ T2582] RAX: 0000000000000000 RBX: ffff888023694000 RCX: 0000000000000001
[  230.651463][ T2582] RDX: 0000000000000000 RSI: ffffffff93f10759 RDI: ffffffff93658280
[  230.651896][ T2582] RBP: ffffc9000487f228 R08: 0000000000000001 R09: fffff5200090fdde
[  230.652437][ T2582] R10: ffffc9000487eef7 R11: ffff88806cfb9118 R12: 1ffff9200090fe2c
[  230.652881][ T2582] R13: 0000000000000578 R14: ffffc9000487f880 R15: ffff888014d8cae8
[  230.653336][ T2582] FS:  00007f017d783800(0000) GS:ffff8880d6b19000(0000) knlGS:0000000000000000
[  230.653845][ T2582] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  230.654209][ T2582] CR2: 00000000004e7470 CR3: 000000000e102003 CR4: 0000000000772ef0
[  230.654670][ T2582] PKRU: 55555554
[  230.654899][ T2582] Call Trace:
[  230.655117][ T2582]  <TASK>
[ 230.655285][ T2582] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 230.655584][ T2582] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 230.655868][ T2582] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 230.656163][ T2582] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 230.656464][ T2582] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 230.656749][ T2582] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 230.657045][ T2582] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 230.657365][ T2582] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 230.657732][ T2582] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 230.658017][ T2582] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 230.658312][ T2582] ? __kernel_text_address (kernel/extable.c:79) 
[ 230.658601][ T2582] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 230.658895][ T2582] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 230.659183][ T2582] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 230.659554][ T2582] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 230.659850][ T2582] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 230.660135][ T2582] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 230.660433][ T2582] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 230.660722][ T2582] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 230.661010][ T2582] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 230.661322][ T2582] ? __create_object (mm/kmemleak.c:771) 
[ 230.661614][ T2582] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 230.661901][ T2582] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 230.662190][ T2582] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 230.662560][ T2582] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 230.662854][ T2582] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 230.663146][ T2582] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 230.663449][ T2582] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 230.663757][ T2582] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 230.664043][ T2582] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 230.664341][ T2582] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 230.664631][ T2582] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 230.664916][ T2582] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 230.665208][ T2582] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 230.665525][ T2582] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 230.665828][ T2582] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 230.666116][ T2582] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 230.666423][ T2582] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 230.666722][ T2582] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 230.667010][ T2582] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 230.667313][ T2582] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 230.667614][ T2582] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 230.667904][ T2582] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 230.668197][ T2582] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 230.668502][ T2582] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 230.668795][ T2582] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 230.669088][ T2582] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 230.669403][ T2582] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 230.669697][ T2582] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 230.670072][ T2582] ___sys_sendmsg (net/socket.c:2670) 
[ 230.670370][ T2582] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 230.670656][ T2582] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 230.671013][ T2582] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 230.671319][ T2582] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 230.671617][ T2582] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 230.671911][ T2582] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 230.672204][ T2582] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 230.672504][ T2582] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 230.672803][ T2582] __sys_sendmsg (net/socket.c:2700) 
[ 230.673094][ T2582] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 230.673474][ T2582] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 230.673782][ T2582] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 230.674071][ T2582] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 230.674373][ T2582] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  230.674731][ T2582] RIP: 0033:0x7f017d9501e7
[ 230.675031][ T2582] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[  230.676075][ T2582] RSP: 002b:00007fff2c78de68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  230.676561][ T2582] RAX: ffffffffffffffda RBX: 00007fff2c78e590 RCX: 00007f017d9501e7
[  230.676995][ T2582] RDX: 0000000000000000 RSI: 00007fff2c78ded0 RDI: 0000000000000005
[  230.677462][ T2582] RBP: 0000000000000006 R08: 0000000000000003 R09: 0000000000000078
[  230.677907][ T2582] R10: 00007f017d84dee8 R11: 0000000000000246 R12: 0000000000000006
[  230.678359][ T2582] R13: 00000000686e4f3d R14: 0000000000499600 R15: 0000000000000000
| [  233.235674][ T2594] ------------[ cut here ]------------
| [ 233.235974][ T2594] WARNING: CPU: 0 PID: 2594 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [  233.236596][ T2594] Modules linked in: act_gact cls_flower vxlan sch_fq act_mirred cls_matchall ip6_gre gre sch_ingress [last unloaded: test_bpf]
| [  233.237962][ T2594] Tainted: [W]=WARN
[  233.238192][ T2594] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 233.238570][ T2594] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 233.238877][ T2594] Code: 00 00 8b 05 97 05 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 fa fd 9b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 97 05 bc 02    	mov    0x2bc0597(%rip),%eax        # 0x2bc059f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa fd 9b 00       	call   0x9bfe1b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[  233.239950][ T2594] RSP: 0018:ffffc900048beef0 EFLAGS: 00010246
[  233.240336][ T2594] RAX: 0000000000000000 RBX: ffff88802229a000 RCX: 0000000000000001
[  233.240785][ T2594] RDX: 0000000000000000 RSI: ffffffff93f10759 RDI: ffffffff93658280
[  233.241240][ T2594] RBP: ffffc900048befd8 R08: 0000000000000000 R09: 0000000000000000
[  233.242308][ T2594] R10: ffffc900048bf008 R11: ffffffff9498d1e0 R12: 1ffff92000917de2
[  233.242749][ T2594] R13: 00000000000005dc R14: ffffc900048bf008 R15: ffff88802229af48
[  233.243190][ T2594] FS:  00007fdf57226800(0000) GS:ffff8880d6999000(0000) knlGS:0000000000000000
[  233.243717][ T2594] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  233.244088][ T2594] CR2: 00000000004e5eb0 CR3: 000000000afbb004 CR4: 0000000000772ef0
[  233.244542][ T2594] PKRU: 55555554
[  233.244761][ T2594] Call Trace:
[  233.244980][ T2594]  <TASK>
[ 233.245133][ T2594] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 233.245434][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.245746][ T2594] netif_set_mtu (net/core/dev.c:9652) 
[ 233.246043][ T2594] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 233.246369][ T2594] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 233.246593][ T2594] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 233.246897][ T2594] br_add_if (net/bridge/br_if.c:697) 
[ 233.247130][ T2594] do_set_master (net/core/rtnetlink.c:2948) 
[ 233.247445][ T2594] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 233.247745][ T2594] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 233.248047][ T2594] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 233.248433][ T2594] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 233.248728][ T2594] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 233.249019][ T2594] ? __kernel_text_address (kernel/extable.c:79) 
[ 233.249326][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.249628][ T2594] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 233.249923][ T2594] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 233.250300][ T2594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 233.250603][ T2594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 233.250899][ T2594] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 233.251191][ T2594] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 233.251493][ T2594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.251786][ T2594] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 233.252074][ T2594] ? __create_object (mm/kmemleak.c:771) 
[ 233.252379][ T2594] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 233.252679][ T2594] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 233.252977][ T2594] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 233.253350][ T2594] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 233.253649][ T2594] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 233.253946][ T2594] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 233.254239][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.254545][ T2594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.254855][ T2594] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 233.255147][ T2594] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 233.255450][ T2594] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 233.255744][ T2594] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 233.256038][ T2594] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 233.256351][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.256653][ T2594] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 233.256948][ T2594] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 233.257277][ T2594] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 233.257587][ T2594] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 233.257878][ T2594] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 233.258172][ T2594] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 233.258484][ T2594] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 233.258778][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.259075][ T2594] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 233.259386][ T2594] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 233.259684][ T2594] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 233.259984][ T2594] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 233.260287][ T2594] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 233.260580][ T2594] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 233.260958][ T2594] ___sys_sendmsg (net/socket.c:2670) 
[ 233.261247][ T2594] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 233.261554][ T2594] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 233.261924][ T2594] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 233.262223][ T2594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.262529][ T2594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.262829][ T2594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.263124][ T2594] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 233.263424][ T2594] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 233.263735][ T2594] __sys_sendmsg (net/socket.c:2700) 
[ 233.264027][ T2594] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 233.264396][ T2594] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 233.264704][ T2594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 233.265000][ T2594] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 233.265301][ T2594] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  233.265667][ T2594] RIP: 0033:0x7fdf573f31e7
[ 233.265974][ T2594] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[  233.267034][ T2594] RSP: 002b:00007ffd9de03e68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  233.267489][ T2594] RAX: ffffffffffffffda RBX: 00007ffd9de04590 RCX: 00007fdf573f31e7
[  233.267934][ T2594] RDX: 0000000000000000 RSI: 00007ffd9de03ed0 RDI: 0000000000000005
[  233.268385][ T2594] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  233.268827][ T2594] R10: 0000000017f18910 R11: 0000000000000246 R12: 0000000000000003
[  233.269274][ T2594] R13: 00000000686e4f3f R14: 0000000000499600 R15: 0000000000000000
| [  233.949967][ T2596] ------------[ cut here ]------------
| [ 233.950525][ T2596] WARNING: CPU: 1 PID: 2596 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [  233.951124][ T2596] Modules linked in: amt act_gact cls_flower vxlan sch_fq act_mirred cls_matchall ip6_gre gre sch_ingress [last unloaded: test_bpf]
| [  233.952618][ T2596] Tainted: [W]=WARN
[  233.952848][ T2596] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 233.953231][ T2596] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 233.953562][ T2596] Code: 00 00 8b 05 97 05 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 fa fd 9b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 97 05 bc 02    	mov    0x2bc0597(%rip),%eax        # 0x2bc059f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa fd 9b 00       	call   0x9bfe1b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[  233.954663][ T2596] RSP: 0018:ffffc900048bf080 EFLAGS: 00010246
[  233.955058][ T2596] RAX: 0000000000000000 RBX: ffff88802229a000 RCX: 0000000000000001
[  233.955528][ T2596] RDX: 0000000000000000 RSI: ffffffff93f10759 RDI: ffffffff93658280
[  233.955990][ T2596] RBP: ffffc900048bf168 R08: 0000000000000000 R09: 0000000000000000
[  233.956467][ T2596] R10: ffffc900048bf198 R11: ffffffff952ceab8 R12: 1ffff92000917e14
[  233.956921][ T2596] R13: 00000000000005b4 R14: ffffc900048bf198 R15: ffff88802229af48
[  233.957387][ T2596] FS:  00007f6c925e5800(0000) GS:ffff8880d6a19000(0000) knlGS:0000000000000000
[  233.957930][ T2596] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  233.958320][ T2596] CR2: 00005627259ba058 CR3: 0000000024b28006 CR4: 0000000000772ef0
[  233.958801][ T2596] PKRU: 55555554
[  233.959030][ T2596] Call Trace:
[  233.959256][ T2596]  <TASK>
[ 233.959423][ T2596] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 233.959733][ T2596] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 233.960040][ T2596] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 233.960427][ T2596] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 233.960741][ T2596] netif_set_mtu (net/core/dev.c:9652) 
[ 233.961044][ T2596] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 233.961367][ T2596] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) 
[ 233.961751][ T2596] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 233.961981][ T2596] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 233.962299][ T2596] br_add_if (net/bridge/br_if.c:697) 
[ 233.962542][ T2596] do_set_master (net/core/rtnetlink.c:2948) 
[ 233.962845][ T2596] ? rtnl_configure_link (net/core/rtnetlink.c:3592) 
[ 233.963153][ T2596] ? nla_strscpy (lib/nlattr.c:798) 
[ 233.963471][ T2596] rtnl_newlink_create (net/core/rtnetlink.c:3840) 
[ 233.963781][ T2596] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 233.964084][ T2596] ? __dev_get_by_name (net/core/dev.c:865) 
[ 233.964397][ T2596] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 233.964701][ T2596] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 233.965006][ T2596] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 233.965325][ T2596] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 233.965633][ T2596] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 233.965950][ T2596] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 233.966265][ T2596] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 233.966594][ T2596] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 233.966896][ T2596] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 233.967200][ T2596] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 233.967516][ T2596] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 233.967821][ T2596] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 233.968127][ T2596] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.968444][ T2596] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 233.968749][ T2596] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 233.969056][ T2596] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 233.969379][ T2596] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 233.969690][ T2596] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 233.969994][ T2596] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 233.970306][ T2596] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 233.970606][ T2596] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.970911][ T2596] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 233.971217][ T2596] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 233.971525][ T2596] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 233.971833][ T2596] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 233.972143][ T2596] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 233.972449][ T2596] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 233.972841][ T2596] ___sys_sendmsg (net/socket.c:2670) 
[ 233.973140][ T2596] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 233.973449][ T2596] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 233.973825][ T2596] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 233.974134][ T2596] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.974448][ T2596] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 233.974754][ T2596] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 233.975053][ T2596] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 233.975361][ T2596] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 233.975669][ T2596] __sys_sendmsg (net/socket.c:2700) 
[ 233.975969][ T2596] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 233.976354][ T2596] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 233.976675][ T2596] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 233.976979][ T2596] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 233.977291][ T2596] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  233.977663][ T2596] RIP: 0033:0x7f6c927b21e7
[ 233.977975][ T2596] Code: Unable to access opcode bytes at 0x7f6c927b21bd.

Code starting with the faulting instruction
===========================================
[  233.978374][ T2596] RSP: 002b:00007fffe9ea4d88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  233.978834][ T2596] RAX: ffffffffffffffda RBX: 00007fffe9ea54b0 RCX: 00007f6c927b21e7
[  233.979293][ T2596] RDX: 0000000000000000 RSI: 00007fffe9ea4df0 RDI: 0000000000000005
[  233.979745][ T2596] RBP: 000000000000000c R08: 0000000000000074 R09: 0000000000000000
[  233.980195][ T2596] R10: 00007f6c92840ac0 R11: 0000000000000246 R12: 00007fffe9ea54d8
[  233.980659][ T2596] R13: 00000000686e4f40 R14: 0000000000499600 R15: 00007fffe9ea4ee0
| [ 2013.816373][   T67] ------------[ cut here ]------------
| [ 2013.816953][ T67] WARNING: CPU: 3 PID: 67 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [ 2013.817479][   T67] Modules linked in: xt_HL nft_compat nf_tables amt act_gact cls_flower vxlan sch_fq act_mirred cls_matchall ip6_gre gre sch_ingress [last unloaded: test_bpf]
| [ 2013.819230][   T67] Tainted: [W]=WARN
[ 2013.819463][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 2013.819829][   T67] Workqueue: netns cleanup_net
[ 2013.820141][ T67] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 2013.820450][ T67] Code: 00 00 8b 05 97 05 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 fa fd 9b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 97 05 bc 02    	mov    0x2bc0597(%rip),%eax        # 0x2bc059f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa fd 9b 00       	call   0x9bfe1b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[ 2013.821497][   T67] RSP: 0000:ffffc900004875b0 EFLAGS: 00010246
[ 2013.821866][   T67] RAX: 0000000000000000 RBX: ffff88802229a000 RCX: 0000000000000001
[ 2013.822306][   T67] RDX: 0000000000000000 RSI: ffffffff93f10759 RDI: ffffffff93658280
[ 2013.822738][   T67] RBP: ffffc90000487698 R08: 0000000000000000 R09: 0000000000000000
[ 2013.823177][   T67] R10: ffffc900004876c8 R11: ffffffff9089be78 R12: 1ffff92000090eba
[ 2013.823625][   T67] R13: 00000000000005b4 R14: ffffc900004876c8 R15: ffff88802229af48
[ 2013.824063][   T67] FS:  0000000000000000(0000) GS:ffff8880d6b19000(0000) knlGS:0000000000000000
[ 2013.824582][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2013.824955][   T67] CR2: 00007ff8ff7bd49d CR3: 000000001db4a001 CR4: 0000000000772ef0
[ 2013.825399][   T67] PKRU: 55555554
[ 2013.825619][   T67] Call Trace:
[ 2013.825841][   T67]  <TASK>
[ 2013.825989][ T67] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 2013.826368][ T67] ? br_del_if (net/bridge/br_if.c:742) 
[ 2013.826591][ T67] ? br_device_event (net/bridge/br.c:141) 
[ 2013.826882][ T67] ? notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 2013.827178][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 2013.827475][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 2013.827763][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 2013.828059][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 2013.828352][ T67] ? kthread (kernel/kthread.c:464) 
[ 2013.828580][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 2013.828875][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 2013.829172][ T67] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 2013.829490][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 2013.829781][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 2013.830092][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 2013.830327][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 2013.830621][ T67] br_del_if (net/bridge/br_if.c:743) 
[ 2013.830848][ T67] br_device_event (net/bridge/br.c:141) 
[ 2013.831140][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) 
[ 2013.831450][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 2013.831748][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 2013.832115][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 2013.832412][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 2013.832777][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 2013.833143][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 2013.833512][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 2013.833880][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 2013.834169][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 2013.834543][ T67] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 2013.834838][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 2013.835125][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 2013.835432][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 2013.835749][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 2013.836041][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 2013.836348][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 2013.836646][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 2013.836945][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 2013.837238][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 2013.837544][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 2013.837840][ T67] kthread (kernel/kthread.c:464) 
[ 2013.838059][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 2013.838358][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 2013.838662][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 2013.838952][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 2013.839239][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 2013.839538][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 2013.839823][ T67] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
netif_set_mtu_ext:rtnl_newlink:rtnetlink_rcv_msg:netlink_rcv_skb:netlink_unicast
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:br_mtu_auto_adjust:br_del_if
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:br_mtu_auto_adjust:br_add_if