======================================
| 0
| xx__-> [   18.441917][  T297] ------------[ cut here ]------------
| [ 18.442601][ T297] WARNING: CPU: 1 PID: 297 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) 
| [   18.443182][  T297] Modules linked in:
[   18.444034][  T297] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.444409][ T297] 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) 
[ 18.444710][ T297] 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
[   18.445762][  T297] RSP: 0018:ffffc90000d27140 EFLAGS: 00010246
[   18.446137][  T297] RAX: 0000000000000000 RBX: ffff88800af04000 RCX: 0000000000000001
[   18.446658][  T297] RDX: 0000000000000000 RSI: ffffffff95d10759 RDI: ffffffff95458280
[   18.447084][  T297] RBP: ffffc90000d27228 R08: 0000000000000001 R09: fffff520001a4dde
[   18.447530][  T297] R10: ffffc90000d26ef7 R11: ffff88806ceb9118 R12: 1ffff920001a4e2c
[   18.447954][  T297] R13: 0000000000000578 R14: ffffc90000d27880 R15: ffff88800bb1d568
[   18.448402][  T297] FS:  00007f5c17a5a800(0000) GS:ffff8880d4c19000(0000) knlGS:0000000000000000
[   18.448893][  T297] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.449275][  T297] CR2: 00000000004e73a0 CR3: 000000000c576006 CR4: 0000000000772ef0
[   18.449709][  T297] PKRU: 55555554
[   18.449921][  T297] Call Trace:
[   18.450130][  T297]  <TASK>
[ 18.450286][ T297] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.450575][ T297] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 18.450849][ T297] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 18.451130][ T297] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 18.451431][ T297] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 18.451709][ T297] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 18.451993][ T297] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 18.452291][ T297] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 18.452647][ T297] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 18.452926][ T297] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 18.453202][ T297] ? __kernel_text_address (kernel/extable.c:79) 
[ 18.453503][ T297] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.453791][ T297] ? __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) 
[ 18.454071][ T297] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 18.454426][ T297] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.454709][ T297] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.454986][ T297] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 18.455275][ T297] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 18.455556][ T297] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.455833][ T297] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 18.456108][ T297] ? __create_object (mm/kmemleak.c:771) 
[ 18.456402][ T297] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 18.456687][ T297] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 18.456969][ T297] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.457344][ T297] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 18.457630][ T297] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 18.457914][ T297] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 18.458197][ T297] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.458513][ T297] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.458800][ T297] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 18.459097][ T297] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 18.459390][ T297] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 18.459692][ T297] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 18.459971][ T297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 18.460268][ T297] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.460550][ T297] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 18.460841][ T297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 18.461134][ T297] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 18.461442][ T297] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 18.461728][ T297] ? 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) 
[ 18.462007][ T297] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 18.462298][ T297] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 18.462590][ T297] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.462872][ T297] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 18.463153][ T297] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 18.463446][ T297] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 18.463741][ T297] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 18.464021][ T297] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 18.464309][ T297] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 18.464667][ T297] ___sys_sendmsg (net/socket.c:2670) 
[ 18.464955][ T297] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.465234][ T297] ? __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) 
[ 18.465601][ T297] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 18.465898][ T297] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.466179][ T297] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.466476][ T297] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.466757][ T297] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 18.467042][ T297] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 18.467349][ T297] __sys_sendmsg (net/socket.c:2700) 
[ 18.467639][ T297] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 18.467986][ T297] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 18.468288][ T297] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.468573][ T297] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.468861][ T297] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.469207][  T297] RIP: 0033:0x7f5c17c271e7
[ 18.469529][ T297] 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)
[   18.470567][  T297] RSP: 002b:00007ffff7616088 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   18.470994][  T297] RAX: ffffffffffffffda RBX: 00007ffff76167b0 RCX: 00007f5c17c271e7
[   18.471422][  T297] RDX: 0000000000000000 RSI: 00007ffff76160f0 RDI: 0000000000000005
[   18.471846][  T297] RBP: 0000000000000006 R08: 0000000000000003 R09: 0000000000000078
[   18.472285][  T297] R10: 00007f5c17b24ee8 R11: 0000000000000246 R12: 0000000000000006
[   18.472716][  T297] R13: 00000000686e334b R14: 0000000000499600 R15: 0000000000000000
| [   21.179819][  T309] ------------[ cut here ]------------
| [ 21.180419][ T309] WARNING: CPU: 1 PID: 309 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) 
| [   21.181511][  T309] Modules linked in:
| [   21.183042][  T309] Tainted: [W]=WARN
[   21.183483][  T309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.184166][ T309] 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) 
[ 21.184726][ T309] 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
[   21.186609][  T309] RSP: 0018:ffffc90000d66ef0 EFLAGS: 00010246
[   21.187309][  T309] RAX: 0000000000000000 RBX: ffff88800d79a000 RCX: 0000000000000001
[   21.188105][  T309] RDX: 0000000000000000 RSI: ffffffff95d10759 RDI: ffffffff95458280
[   21.188944][  T309] RBP: ffffc90000d66fd8 R08: 0000000000000000 R09: 0000000000000000
[   21.189768][  T309] R10: ffffc90000d67008 R11: ffffffff9678d1e0 R12: 1ffff920001acde2
[   21.190599][  T309] R13: 00000000000005dc R14: ffffc90000d67008 R15: ffff88800d79af48
[   21.191427][  T309] FS:  00007fa73b09c800(0000) GS:ffff8880d4c19000(0000) knlGS:0000000000000000
[   21.192388][  T309] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.193063][  T309] CR2: 00007f50ed4d5000 CR3: 00000000194a2005 CR4: 0000000000772ef0
[   21.193890][  T309] PKRU: 55555554
[   21.194307][  T309] Call Trace:
[   21.194698][  T309]  <TASK>
[ 21.194975][ T309] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.195540][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.196098][ T309] netif_set_mtu (net/core/dev.c:9652) 
[ 21.196667][ T309] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.197279][ T309] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.197699][ T309] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 21.198267][ T309] br_add_if (net/bridge/br_if.c:697) 
[ 21.198703][ T309] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.199234][ T309] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 21.199816][ T309] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.200392][ T309] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.201063][ T309] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.201608][ T309] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.202138][ T309] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.202697][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.203235][ T309] ? __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) 
[ 21.203786][ T309] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.204472][ T309] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.205019][ T309] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.205575][ T309] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.206112][ T309] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.206655][ T309] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.207197][ T309] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.207744][ T309] ? __create_object (mm/kmemleak.c:771) 
[ 21.208291][ T309] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.208827][ T309] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.209383][ T309] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.210017][ T309] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.210583][ T309] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.211126][ T309] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.211672][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.212215][ T309] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.212774][ T309] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.213334][ T309] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.213861][ T309] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.214385][ T309] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.214919][ T309] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.215472][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.216003][ T309] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.216529][ T309] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.217059][ T309] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.217634][ T309] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.218138][ T309] ? 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) 
[ 21.218698][ T309] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.219229][ T309] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.219770][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.220334][ T309] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.220882][ T309] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.221435][ T309] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.221957][ T309] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.222516][ T309] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.223032][ T309] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.223726][ T309] ___sys_sendmsg (net/socket.c:2670) 
[ 21.224247][ T309] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.224789][ T309] ? __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) 
[ 21.225474][ T309] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.226010][ T309] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.226566][ T309] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.227099][ T309] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.227637][ T309] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.228166][ T309] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.228741][ T309] __sys_sendmsg (net/socket.c:2700) 
[ 21.229298][ T309] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.229941][ T309] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.230525][ T309] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.231041][ T309] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.231567][ T309] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.232201][  T309] RIP: 0033:0x7fa73b2691e7
[ 21.232761][ T309] 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)
[   21.234621][  T309] RSP: 002b:00007ffefe326ab8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.235437][  T309] RAX: ffffffffffffffda RBX: 00007ffefe3271e0 RCX: 00007fa73b2691e7
[   21.236236][  T309] RDX: 0000000000000000 RSI: 00007ffefe326b20 RDI: 0000000000000005
[   21.237042][  T309] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   21.237850][  T309] R10: 000000002f134910 R11: 0000000000000246 R12: 0000000000000003
[   21.238650][  T309] R13: 00000000686e334e R14: 0000000000499600 R15: 0000000000000000
| [   21.918014][  T311] ------------[ cut here ]------------
| [ 21.918721][ T311] WARNING: CPU: 2 PID: 311 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) 
| [   21.919378][  T311] Modules linked in: amt
| [   21.920355][  T311] Tainted: [W]=WARN
[   21.920603][  T311] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.921009][ T311] 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) 
[ 21.921371][ T311] 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
[   21.922502][  T311] RSP: 0018:ffffc90000d77080 EFLAGS: 00010246
[   21.922916][  T311] RAX: 0000000000000000 RBX: ffff88800d79a000 RCX: 0000000000000001
[   21.923405][  T311] RDX: 0000000000000000 RSI: ffffffff95d10759 RDI: ffffffff95458280
[   21.923892][  T311] RBP: ffffc90000d77168 R08: 0000000000000000 R09: 0000000000000000
[   21.924391][  T311] R10: ffffc90000d77198 R11: ffffffff9678d1e0 R12: 1ffff920001aee14
[   21.924873][  T311] R13: 00000000000005b4 R14: ffffc90000d77198 R15: ffff88800d79af48
[   21.925376][  T311] FS:  00007f30446c8800(0000) GS:ffff8880d4c99000(0000) knlGS:0000000000000000
[   21.925981][  T311] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.926404][  T311] CR2: 00005609d31bd040 CR3: 00000000194a2001 CR4: 0000000000772ef0
[   21.926891][  T311] PKRU: 55555554
[   21.927151][  T311] Call Trace:
[   21.927408][  T311]  <TASK>
[ 21.927586][ T311] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.927936][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.928287][ T311] netif_set_mtu (net/core/dev.c:9652) 
[ 21.928618][ T311] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.928962][ T311] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.929213][ T311] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 21.929567][ T311] br_add_if (net/bridge/br_if.c:697) 
[ 21.929843][ T311] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.930166][ T311] ? rtnl_configure_link (net/core/rtnetlink.c:3592) 
[ 21.930498][ T311] ? nla_strscpy (lib/nlattr.c:798) 
[ 21.930837][ T311] rtnl_newlink_create (net/core/rtnetlink.c:3840) 
[ 21.931173][ T311] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 21.931504][ T311] ? __dev_get_by_name (net/core/dev.c:865) 
[ 21.931833][ T311] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 21.932160][ T311] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 21.932503][ T311] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.932826][ T311] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 21.933157][ T311] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 21.933514][ T311] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.933850][ T311] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.934187][ T311] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.934519][ T311] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.934849][ T311] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.935174][ T311] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.935513][ T311] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.935841][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.936172][ T311] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.936507][ T311] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.936834][ T311] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.937189][ T311] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.937539][ T311] ? 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) 
[ 21.937867][ T311] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.938199][ T311] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.938533][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.938878][ T311] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.939206][ T311] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.939543][ T311] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.939882][ T311] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.940218][ T311] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.940551][ T311] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.940972][ T311] ___sys_sendmsg (net/socket.c:2670) 
[ 21.941315][ T311] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.941646][ T311] ? __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) 
[ 21.942053][ T311] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.942399][ T311] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.942785][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.943119][ T311] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.943451][ T311] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.943780][ T311] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.944111][ T311] __sys_sendmsg (net/socket.c:2700) 
[ 21.944444][ T311] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.944846][ T311] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.945187][ T311] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.945543][ T311] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.945873][ T311] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.946278][  T311] RIP: 0033:0x7f30448951e7
[ 21.946623][ T311] Code: Unable to access opcode bytes at 0x7f30448951bd.

Code starting with the faulting instruction
===========================================
[   21.947046][  T311] RSP: 002b:00007ffd92f46198 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.947584][  T311] RAX: ffffffffffffffda RBX: 00007ffd92f468c0 RCX: 00007f30448951e7
[   21.948075][  T311] RDX: 0000000000000000 RSI: 00007ffd92f46200 RDI: 0000000000000005
[   21.948565][  T311] RBP: 000000000000000c R08: 0000000000000074 R09: 0000000000000000
[   21.949043][  T311] R10: 00007f3044923ac0 R11: 0000000000000246 R12: 00007ffd92f468e8
[   21.949533][  T311] R13: 00000000686e334f R14: 0000000000499600 R15: 00007ffd92f462f0
| [ 1918.767613][   T12] ------------[ cut here ]------------
| [ 1918.767935][ T12] WARNING: CPU: 0 PID: 12 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) 
| [ 1918.768467][   T12] Modules linked in: xt_HL nft_compat nf_tables amt
| [ 1918.769791][   T12] Tainted: [W]=WARN
[ 1918.770026][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1918.770473][   T12] Workqueue: netns cleanup_net
[ 1918.770792][ T12] 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) 
[ 1918.771100][ T12] 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
[ 1918.772177][   T12] RSP: 0018:ffffc900000c75b0 EFLAGS: 00010246
[ 1918.772582][   T12] RAX: 0000000000000000 RBX: ffff88800d79a000 RCX: 0000000000000001
[ 1918.773034][   T12] RDX: 0000000000000000 RSI: ffffffff95d10759 RDI: ffffffff95458280
[ 1918.773501][   T12] RBP: ffffc900000c7698 R08: 0000000000000000 R09: 0000000000000000
[ 1918.773944][   T12] R10: ffffc900000c76c8 R11: ffffffff9269be78 R12: 1ffff92000018eba
[ 1918.774411][   T12] R13: 00000000000005b4 R14: ffffc900000c76c8 R15: ffff88800d79af48
[ 1918.774873][   T12] FS:  0000000000000000(0000) GS:ffff8880d4b99000(0000) knlGS:0000000000000000
[ 1918.775402][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1918.775778][   T12] CR2: 00007f2f7073849d CR3: 0000000015f4a005 CR4: 0000000000772ef0
[ 1918.776236][   T12] PKRU: 55555554
[ 1918.776724][   T12] Call Trace:
[ 1918.776953][   T12]  <TASK>
[ 1918.777109][ T12] ? __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) 
[ 1918.777647][ T12] ? br_del_if (net/bridge/br_if.c:742) 
[ 1918.777875][ T12] ? br_device_event (net/bridge/br.c:141) 
[ 1918.778185][ T12] ? notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 1918.778772][ T12] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 1918.779064][ T12] ? cleanup_net (net/core/net_namespace.c:684) 
[ 1918.779503][ T12] ? process_one_work (kernel/workqueue.c:3238) 
[ 1918.779802][ T12] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1918.780092][ T12] ? kthread (kernel/kthread.c:464) 
[ 1918.780450][ T12] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1918.780745][ T12] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1918.781036][ T12] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1918.781350][ T12] netif_set_mtu (net/core/dev.c:9652) 
[ 1918.781654][ T12] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 1918.781961][ T12] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 1918.782184][ T12] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 1918.782490][ T12] br_del_if (net/bridge/br_if.c:743) 
[ 1918.782717][ T12] br_device_event (net/bridge/br.c:141) 
[ 1918.783016][ T12] ? __pfx_br_device_event (net/bridge/br.c:29) 
[ 1918.783321][ T12] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 1918.783625][ T12] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 1918.783992][ T12] ? 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) 
[ 1918.784288][ T12] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 1918.784660][ T12] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 1918.785016][ T12] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 1918.785405][ T12] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 1918.785789][ T12] default_device_exit_batch (net/core/dev.c:12673) 
[ 1918.786091][ T12] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 1918.786485][ T12] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 1918.786797][ T12] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 1918.787091][ T12] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 1918.787408][ T12] cleanup_net (net/core/net_namespace.c:684) 
[ 1918.787703][ T12] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 1918.788006][ T12] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1918.788322][ T12] process_one_work (kernel/workqueue.c:3238) 
[ 1918.788634][ T12] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 1918.788947][ T12] ? assign_work (kernel/workqueue.c:1200) 
[ 1918.789270][ T12] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1918.789599][ T12] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 1918.789904][ T12] kthread (kernel/kthread.c:464) 
[ 1918.790125][ T12] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1918.790433][ T12] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1918.790729][ T12] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1918.791028][ T12] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1918.791326][ T12] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1918.791620][ T12] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1918.791912][ T12] ? __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