======================================
| 0
| xx__-> [  144.471952][ T2043] ------------[ cut here ]------------
| [ 144.472734][ T2043] WARNING: CPU: 3 PID: 2043 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) 
| [  144.473304][ T2043] Modules linked in: unix_diag cls_bpf sch_ingress
[  144.474239][ T2043] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 144.474589][ T2043] 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) 
[ 144.474880][ T2043] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   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 da fc 9b 00       	call   0x9bfcfb
  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
[  144.475890][ T2043] RSP: 0018:ffffc900009a7140 EFLAGS: 00010246
[  144.476257][ T2043] RAX: 0000000000000000 RBX: ffff888005454000 RCX: 0000000000000001
[  144.476697][ T2043] RDX: 0000000000000000 RSI: ffffffff9db10751 RDI: ffffffff9d258280
[  144.477107][ T2043] RBP: ffffc900009a7228 R08: 0000000000000001 R09: fffff52000134dde
[  144.477529][ T2043] R10: ffffc900009a6ef7 R11: ffff88806cfb9118 R12: 1ffff92000134e2c
[  144.477952][ T2043] R13: 0000000000000578 R14: ffffc900009a7880 R15: ffff88800fa691e8
[  144.478458][ T2043] FS:  00007f35225c8800(0000) GS:ffff8880ccf19000(0000) knlGS:0000000000000000
[  144.478954][ T2043] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  144.479314][ T2043] CR2: 00000000004e73b0 CR3: 000000000c7f8004 CR4: 0000000000772ef0
[  144.479729][ T2043] PKRU: 55555554
[  144.479939][ T2043] Call Trace:
[  144.480150][ T2043]  <TASK>
[ 144.480321][ T2043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 144.480623][ T2043] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 144.480901][ T2043] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 144.481178][ T2043] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 144.481465][ T2043] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 144.482004][ T2043] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 144.482419][ T2043] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 144.482704][ T2043] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 144.483058][ T2043] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 144.483460][ T2043] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 144.483734][ T2043] ? __kernel_text_address (kernel/extable.c:79) 
[ 144.484010][ T2043] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 144.484425][ T2043] ? __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) 
[ 144.484700][ T2043] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 144.485046][ T2043] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 144.485450][ T2043] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 144.485725][ T2043] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 144.486040][ T2043] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 144.486467][ T2043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 144.486743][ T2043] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 144.487015][ T2043] ? __create_object (mm/kmemleak.c:771) 
[ 144.487351][ T2043] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 144.487633][ T2043] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 144.487911][ T2043] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 144.488273][ T2043] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 144.488560][ T2043] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 144.488852][ T2043] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 144.489127][ T2043] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 144.489418][ T2043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 144.489694][ T2043] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 144.489973][ T2043] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 144.490261][ T2043] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 144.490535][ T2043] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 144.490812][ T2043] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 144.491093][ T2043] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 144.491383][ T2043] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 144.491660][ T2043] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 144.491939][ T2043] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 144.492245][ T2043] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 144.492522][ T2043] ? 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) 
[ 144.492938][ T2043] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 144.493236][ T2043] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 144.493511][ T2043] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 144.493791][ T2043] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 144.494117][ T2043] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 144.494408][ T2043] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 144.494689][ T2043] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 144.494965][ T2043] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 144.495248][ T2043] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 144.495599][ T2043] ___sys_sendmsg (net/socket.c:2670) 
[ 144.495872][ T2043] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 144.496148][ T2043] ? __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) 
[ 144.496508][ T2043] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 144.496790][ T2043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 144.497068][ T2043] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 144.497356][ T2043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 144.497631][ T2043] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 144.497905][ T2043] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 144.498194][ T2043] __sys_sendmsg (net/socket.c:2700) 
[ 144.498469][ T2043] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 144.498818][ T2043] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 144.499104][ T2043] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 144.499391][ T2043] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 144.499667][ T2043] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  144.500004][ T2043] RIP: 0033:0x7f35227951e7
[ 144.500312][ T2043] 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)
[  144.501315][ T2043] RSP: 002b:00007ffca590d978 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  144.501757][ T2043] RAX: ffffffffffffffda RBX: 00007ffca590e0a0 RCX: 00007f35227951e7
[  144.502172][ T2043] RDX: 0000000000000000 RSI: 00007ffca590d9e0 RDI: 0000000000000005
[  144.502597][ T2043] RBP: 0000000000000006 R08: 0000000000000003 R09: 0000000000000078
[  144.503013][ T2043] R10: 00007f3522692ee8 R11: 0000000000000246 R12: 0000000000000006
[  144.503432][ T2043] R13: 00000000686e7916 R14: 0000000000499600 R15: 0000000000000000
| [  147.020253][ T2055] ------------[ cut here ]------------
| [ 147.020556][ T2055] WARNING: CPU: 3 PID: 2055 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) 
| [  147.021138][ T2055] Modules linked in: unix_diag cls_bpf sch_ingress
| [  147.022129][ T2055] Tainted: [W]=WARN
[  147.022364][ T2055] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 147.022731][ T2055] 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) 
[ 147.023037][ T2055] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   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 da fc 9b 00       	call   0x9bfcfb
  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
[  147.024091][ T2055] RSP: 0018:ffffc900009e6ef0 EFLAGS: 00010246
[  147.024474][ T2055] RAX: 0000000000000000 RBX: ffff888017402000 RCX: 0000000000000001
[  147.024917][ T2055] RDX: 0000000000000000 RSI: ffffffff9db10751 RDI: ffffffff9d258280
[  147.025363][ T2055] RBP: ffffc900009e6fd8 R08: 0000000000000000 R09: 0000000000000000
[  147.025800][ T2055] R10: ffffc900009e7008 R11: ffffffff9e58d1e0 R12: 1ffff9200013cde2
[  147.026263][ T2055] R13: 00000000000005dc R14: ffffc900009e7008 R15: ffff888017402f48
[  147.026705][ T2055] FS:  00007f4f20ea5800(0000) GS:ffff8880ccf19000(0000) knlGS:0000000000000000
[  147.027247][ T2055] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  147.027619][ T2055] CR2: 00000000004e5eb0 CR3: 00000000026d2001 CR4: 0000000000772ef0
[  147.028059][ T2055] PKRU: 55555554
[  147.028287][ T2055] Call Trace:
[  147.028508][ T2055]  <TASK>
[ 147.028671][ T2055] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 147.028990][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.029313][ T2055] netif_set_mtu (net/core/dev.c:9652) 
[ 147.029605][ T2055] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 147.029912][ T2055] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 147.030135][ T2055] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 147.030441][ T2055] br_add_if (net/bridge/br_if.c:697) 
[ 147.030673][ T2055] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 147.030962][ T2055] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 147.031296][ T2055] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 147.031603][ T2055] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 147.031974][ T2055] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 147.032273][ T2055] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 147.032565][ T2055] ? __kernel_text_address (kernel/extable.c:79) 
[ 147.032858][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.033153][ T2055] ? __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) 
[ 147.033460][ T2055] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 147.033822][ T2055] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 147.034114][ T2055] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 147.034415][ T2055] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 147.034706][ T2055] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 147.034999][ T2055] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.035309][ T2055] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 147.035601][ T2055] ? __create_object (mm/kmemleak.c:771) 
[ 147.035902][ T2055] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 147.036223][ T2055] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 147.036518][ T2055] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 147.036880][ T2055] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 147.037178][ T2055] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 147.037488][ T2055] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 147.037779][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.038082][ T2055] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.038383][ T2055] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 147.038680][ T2055] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 147.038974][ T2055] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 147.039287][ T2055] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 147.039586][ T2055] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 147.039881][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.040182][ T2055] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 147.040490][ T2055] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 147.040782][ T2055] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 147.041085][ T2055] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 147.041382][ T2055] ? 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) 
[ 147.041676][ T2055] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 147.041971][ T2055] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 147.042268][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.042571][ T2055] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 147.042865][ T2055] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 147.043157][ T2055] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 147.043473][ T2055] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 147.043768][ T2055] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 147.044057][ T2055] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 147.044439][ T2055] ___sys_sendmsg (net/socket.c:2670) 
[ 147.044743][ T2055] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 147.045034][ T2055] ? __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) 
[ 147.045406][ T2055] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 147.045703][ T2055] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.045999][ T2055] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.046304][ T2055] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.046597][ T2055] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 147.046894][ T2055] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 147.047213][ T2055] __sys_sendmsg (net/socket.c:2700) 
[ 147.047512][ T2055] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 147.047872][ T2055] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 147.048177][ T2055] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 147.048477][ T2055] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 147.048781][ T2055] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  147.049150][ T2055] RIP: 0033:0x7f4f210721e7
[ 147.049459][ T2055] 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)
[  147.050507][ T2055] RSP: 002b:00007ffd41c75268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  147.050948][ T2055] RAX: ffffffffffffffda RBX: 00007ffd41c75990 RCX: 00007f4f210721e7
[  147.051406][ T2055] RDX: 0000000000000000 RSI: 00007ffd41c752d0 RDI: 0000000000000005
[  147.051847][ T2055] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  147.052289][ T2055] R10: 0000000027045910 R11: 0000000000000246 R12: 0000000000000003
[  147.052727][ T2055] R13: 00000000686e7918 R14: 0000000000499600 R15: 0000000000000000
| [  147.691886][ T2057] ------------[ cut here ]------------
| [ 147.692211][ T2057] WARNING: CPU: 0 PID: 2057 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) 
| [  147.692806][ T2057] Modules linked in: amt unix_diag cls_bpf sch_ingress
| [  147.694009][ T2057] Tainted: [W]=WARN
[  147.694381][ T2057] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 147.694761][ T2057] 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) 
[ 147.695072][ T2057] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   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 da fc 9b 00       	call   0x9bfcfb
  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
[  147.696290][ T2057] RSP: 0018:ffffc900009f7080 EFLAGS: 00010246
[  147.696673][ T2057] RAX: 0000000000000000 RBX: ffff888017402000 RCX: 0000000000000001
[  147.697126][ T2057] RDX: 0000000000000000 RSI: ffffffff9db10751 RDI: ffffffff9d258280
[  147.697591][ T2057] RBP: ffffc900009f7168 R08: 0000000000000000 R09: 0000000000000000
[  147.698047][ T2057] R10: ffffc900009f7198 R11: ffffffff9e58d1e0 R12: 1ffff9200013ee14
[  147.698513][ T2057] R13: 00000000000005b4 R14: ffffc900009f7198 R15: ffff888017402f48
[  147.698977][ T2057] FS:  00007f6866301800(0000) GS:ffff8880ccd99000(0000) knlGS:0000000000000000
[  147.699519][ T2057] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  147.699902][ T2057] CR2: 00007fac0e65e100 CR3: 00000000175fb005 CR4: 0000000000772ef0
[  147.700369][ T2057] PKRU: 55555554
[  147.700595][ T2057] Call Trace:
[  147.700820][ T2057]  <TASK>
[ 147.700977][ T2057] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 147.701288][ T2057] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.701604][ T2057] netif_set_mtu (net/core/dev.c:9652) 
[ 147.701906][ T2057] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 147.702241][ T2057] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 147.702483][ T2057] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 147.702790][ T2057] br_add_if (net/bridge/br_if.c:697) 
[ 147.703032][ T2057] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 147.703343][ T2057] ? rtnl_configure_link (net/core/rtnetlink.c:3592) 
[ 147.703644][ T2057] ? nla_strscpy (lib/nlattr.c:798) 
[ 147.703950][ T2057] rtnl_newlink_create (net/core/rtnetlink.c:3840) 
[ 147.704265][ T2057] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 147.704574][ T2057] ? __dev_get_by_name (net/core/dev.c:865) 
[ 147.704875][ T2057] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 147.705177][ T2057] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 147.705492][ T2057] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 147.705792][ T2057] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 147.706098][ T2057] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 147.706421][ T2057] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 147.706732][ T2057] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 147.707051][ T2057] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 147.707363][ T2057] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 147.707669][ T2057] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 147.707972][ T2057] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 147.708286][ T2057] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 147.708599][ T2057] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.708919][ T2057] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 147.709232][ T2057] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 147.709539][ T2057] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 147.709857][ T2057] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 147.710157][ T2057] ? 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) 
[ 147.710471][ T2057] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 147.710777][ T2057] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 147.711079][ T2057] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.711402][ T2057] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 147.711710][ T2057] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 147.712015][ T2057] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 147.712334][ T2057] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 147.712641][ T2057] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 147.712944][ T2057] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 147.713340][ T2057] ___sys_sendmsg (net/socket.c:2670) 
[ 147.713648][ T2057] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 147.713950][ T2057] ? __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) 
[ 147.714338][ T2057] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 147.714647][ T2057] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.714954][ T2057] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 147.715274][ T2057] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 147.715583][ T2057] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 147.715888][ T2057] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 147.716208][ T2057] __sys_sendmsg (net/socket.c:2700) 
[ 147.716511][ T2057] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 147.716887][ T2057] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 147.717212][ T2057] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 147.717520][ T2057] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 147.717822][ T2057] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  147.718208][ T2057] RIP: 0033:0x7f68664ce1e7
[ 147.718522][ T2057] Code: Unable to access opcode bytes at 0x7f68664ce1bd.

Code starting with the faulting instruction
===========================================
[  147.718924][ T2057] RSP: 002b:00007ffe480d7558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  147.719387][ T2057] RAX: ffffffffffffffda RBX: 00007ffe480d7c80 RCX: 00007f68664ce1e7
[  147.719839][ T2057] RDX: 0000000000000000 RSI: 00007ffe480d75c0 RDI: 0000000000000005
[  147.720300][ T2057] RBP: 000000000000000c R08: 0000000000000074 R09: 0000000000000000
[  147.720754][ T2057] R10: 00007f686655cac0 R11: 0000000000000246 R12: 00007ffe480d7ca8
[  147.721213][ T2057] R13: 00000000686e7919 R14: 0000000000499600 R15: 00007ffe480d76b0
| [ 1911.690275][   T68] ------------[ cut here ]------------
| [ 1911.690603][ T68] WARNING: CPU: 1 PID: 68 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) 
| [ 1911.691117][   T68] Modules linked in: xt_HL nft_compat nf_tables amt unix_diag cls_bpf sch_ingress
| [ 1911.692514][   T68] Tainted: [W]=WARN
[ 1911.692790][   T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1911.693384][   T68] Workqueue: netns cleanup_net
[ 1911.693701][ T68] 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) 
[ 1911.694011][ T68] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   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 da fc 9b 00       	call   0x9bfcfb
  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
[ 1911.695198][   T68] RSP: 0018:ffffc900004975b0 EFLAGS: 00010246
[ 1911.695568][   T68] RAX: 0000000000000000 RBX: ffff888017402000 RCX: 0000000000000001
[ 1911.696011][   T68] RDX: 0000000000000000 RSI: ffffffff9db10751 RDI: ffffffff9d258280
[ 1911.696577][   T68] RBP: ffffc90000497698 R08: 0000000000000000 R09: 0000000000000000
[ 1911.697010][   T68] R10: ffffc900004976c8 R11: ffffffff99ebe86a R12: 1ffff92000092eba
[ 1911.697531][   T68] R13: 00000000000005b4 R14: ffffc900004976c8 R15: ffff888017402f48
[ 1911.697965][   T68] FS:  0000000000000000(0000) GS:ffff8880cce19000(0000) knlGS:0000000000000000
[ 1911.698486][   T68] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1911.698854][   T68] CR2: 00005565e2745dec CR3: 000000000f83e003 CR4: 0000000000772ef0
[ 1911.699303][   T68] PKRU: 55555554
[ 1911.699522][   T68] Call Trace:
[ 1911.699744][   T68]  <TASK>
[ 1911.699899][ T68] ? __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) 
[ 1911.700270][ T68] ? br_del_if (net/bridge/br_if.c:742) 
[ 1911.700493][ T68] ? br_device_event (net/bridge/br.c:141) 
[ 1911.700789][ T68] ? notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 1911.701081][ T68] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 1911.701374][ T68] ? cleanup_net (net/core/net_namespace.c:684) 
[ 1911.701667][ T68] ? process_one_work (kernel/workqueue.c:3238) 
[ 1911.701954][ T68] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1911.702250][ T68] ? kthread (kernel/kthread.c:464) 
[ 1911.702466][ T68] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1911.702755][ T68] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1911.703049][ T68] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1911.703363][ T68] netif_set_mtu (net/core/dev.c:9652) 
[ 1911.703654][ T68] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 1911.703959][ T68] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 1911.704180][ T68] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 1911.704485][ T68] br_del_if (net/bridge/br_if.c:743) 
[ 1911.704703][ T68] br_device_event (net/bridge/br.c:141) 
[ 1911.704994][ T68] ? __pfx_br_device_event (net/bridge/br.c:29) 
[ 1911.705304][ T68] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 1911.705597][ T68] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 1911.705962][ T68] ? 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) 
[ 1911.706264][ T68] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 1911.706622][ T68] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 1911.706976][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 1911.707343][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 1911.707711][ T68] default_device_exit_batch (net/core/dev.c:12673) 
[ 1911.707999][ T68] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 1911.708373][ T68] ops_undo_list (net/core/net_namespace.c:250) 
[ 1911.708665][ T68] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 1911.708948][ T68] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 1911.709257][ T68] cleanup_net (net/core/net_namespace.c:684) 
[ 1911.709546][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 1911.709834][ T68] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1911.710131][ T68] process_one_work (kernel/workqueue.c:3238) 
[ 1911.710442][ T68] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 1911.710751][ T68] ? assign_work (kernel/workqueue.c:1200) 
[ 1911.711046][ T68] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1911.711348][ T68] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 1911.711638][ T68] kthread (kernel/kthread.c:464) 
[ 1911.711859][ T68] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1911.712144][ T68] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1911.712438][ T68] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1911.712732][ T68] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1911.713018][ T68] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1911.713316][ T68] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1911.713601][ T68] ? __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