======================================
| # [   23.833529] c1: entered promiscuous mode
| # [   23.836329] ------------[ cut here ]------------
| # [   23.837767] WARNING: CPU: 3 PID: 308 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) 
| # [   23.838388] Modules linked in: veth bridge stp llc
# [   23.839317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   23.839713] 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) 
# [ 23.840032] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
# [   23.841140] RSP: 0018:ffffc90000666ef0 EFLAGS: 00010246
# [   23.841531] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
# [   23.842008] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
# [   23.842473] RBP: ffffc90000666fe0 R08: 0000000000000000 R09: 0000000000000000
# [   23.842944] R10: ffffc90000667010 R11: ffffffffae3798a0 R12: 1ffff920000ccde2
# [   23.843406] R13: 00000000000005dc R14: ffffc90000667010 R15: ffff88800fd4af08
# [   23.843877] FS:  00007f91ba9b2800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
# [   23.844416] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   23.844815] CR2: 00000000004e6888 CR3: 000000000941c002 CR4: 0000000000772ef0
# [   23.845281] PKRU: 55555554
# [   23.845513] Call Trace:
# [   23.845755]  <TASK>
# [   23.845918] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   23.846230] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.846546] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.846866] netif_set_mtu (net/core/dev.c:9652) 
# [   23.847177] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   23.847499] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   23.847875] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   23.848313] br_add_if (net/bridge/br_if.c:697) bridge 
# [   23.848677] do_set_master (net/core/rtnetlink.c:2948) 
# [   23.848990] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   23.849304] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   23.849700] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   23.850007] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   23.850312] ? __kernel_text_address (kernel/extable.c:79) 
# [   23.850633] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.850944] ? __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) 
# [   23.851252] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   23.851640] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.851957] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.852262] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   23.852569] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   23.852891] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.853199] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   23.853504] ? __create_object (mm/kmemleak.c:771) 
# [   23.853822] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   23.854131] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   23.854439] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   23.854829] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   23.855143] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   23.855458] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   23.855771] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.856087] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.856393] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   23.856705] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   23.857017] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   23.857325] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   23.857642] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   23.857958] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.858269] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   23.858575] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   23.858893] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   23.859212] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   23.859516] ? 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) 
# [   23.859841] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   23.860153] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   23.860467] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   23.860784] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   23.861092] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   23.861398] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
# [   23.861718] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   23.862034] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   23.862343] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   23.862743] ___sys_sendmsg (net/socket.c:2670) 
# [   23.863047] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   23.863354] ? __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) 
# [   23.863745] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   23.864056] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.864367] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.864689] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.864995] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   23.865300] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   23.865625] __sys_sendmsg (net/socket.c:2700) 
# [   23.865933] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   23.866312] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   23.866639] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.866951] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   23.867260] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   23.867649] RIP: 0033:0x7f91bab7f1e7
# [ 23.867972] 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)
# [   23.869078] RSP: 002b:00007fffe2c96588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   23.869543] RAX: ffffffffffffffda RBX: 00007fffe2c96cb0 RCX: 00007f91bab7f1e7
# [   23.870014] RDX: 0000000000000000 RSI: 00007fffe2c965f0 RDI: 0000000000000005
# [   23.870475] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   23.870945] R10: 0000000039621910 R11: 0000000000000246 R12: 0000000000000003
# [   23.871409] R13: 00000000686e24b7 R14: 0000000000499600 R15: 0000000000000000
| # [   24.550153] ------------[ cut here ]------------
| # [   24.550472] WARNING: CPU: 3 PID: 313 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) 
| # [   24.551099] Modules linked in: veth bridge stp llc
| # [   24.552896] Tainted: [W]=WARN
# [   24.553136] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   24.553518] 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) 
# [ 24.553843] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
# [   24.554947] RSP: 0018:ffffc90000646ef0 EFLAGS: 00010246
# [   24.555337] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
# [   24.555805] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
# [   24.556268] RBP: ffffc90000646fe0 R08: 0000000000000000 R09: 0000000000000000
# [   24.556737] R10: ffffc90000647010 R11: ffffffffaecb19b8 R12: 1ffff920000c8de2
# [   24.557203] R13: 00000000000005dc R14: ffffc90000647010 R15: ffff88800fd4af08
# [   24.557672] FS:  00007f21be79d800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
# [   24.558209] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   24.558608] CR2: 00000000004e6888 CR3: 000000000f55e003 CR4: 0000000000772ef0
# [   24.559079] PKRU: 55555554
# [   24.559310] Call Trace:
# [   24.559539]  <TASK>
# [   24.559706] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   24.560015] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.560326] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   24.560640] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   24.561022] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   24.561334] netif_set_mtu (net/core/dev.c:9652) 
# [   24.561650] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   24.561978] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   24.562406] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   24.562649] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   24.563070] br_add_if (net/bridge/br_if.c:697) bridge 
# [   24.563428] do_set_master (net/core/rtnetlink.c:2948) 
# [   24.563748] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   24.564061] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   24.564450] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   24.564765] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   24.565070] ? __kernel_text_address (kernel/extable.c:79) 
# [   24.565385] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.565705] ? __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) 
# [   24.566012] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   24.566392] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.566708] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.567016] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   24.567323] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   24.567640] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.567948] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   24.568255] ? __create_object (mm/kmemleak.c:771) 
# [   24.568562] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   24.568881] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   24.569189] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   24.569568] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   24.569890] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   24.570203] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   24.570512] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.570836] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.571144] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   24.571448] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   24.571770] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   24.572078] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   24.572386] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   24.572706] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.573025] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   24.573333] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   24.573651] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   24.573972] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   24.574279] ? 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) 
# [   24.574601] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   24.574917] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   24.575237] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   24.575551] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   24.575868] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   24.576179] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
# [   24.576491] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   24.576807] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   24.577115] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   24.577512] ___sys_sendmsg (net/socket.c:2670) 
# [   24.577827] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   24.578134] ? __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) 
# [   24.578518] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   24.578836] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.579148] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.579460] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.579778] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   24.580085] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   24.580398] __sys_sendmsg (net/socket.c:2700) 
# [   24.580714] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   24.581095] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   24.581414] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.581736] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   24.582049] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   24.582431] RIP: 0033:0x7f21be96a1e7
# [ 24.582759] 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)
# [   24.583863] RSP: 002b:00007ffcbba815b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   24.584330] RAX: ffffffffffffffda RBX: 00007ffcbba81ce0 RCX: 00007f21be96a1e7
# [   24.584799] RDX: 0000000000000000 RSI: 00007ffcbba81620 RDI: 0000000000000005
# [   24.585258] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   24.585725] R10: 00000000036cd910 R11: 0000000000000246 R12: 0000000000000003
# [   24.586190] R13: 00000000686e24b8 R14: 0000000000499600 R15: 0000000000000000
| # [   25.251473] ------------[ cut here ]------------
| # [   25.251807] WARNING: CPU: 3 PID: 318 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) 
| # [   25.252418] Modules linked in: veth bridge stp llc
| # [   25.253378] Tainted: [W]=WARN
# [   25.253620] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.254006] 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) 
# [ 25.254323] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
# [   25.255436] RSP: 0018:ffffc900006b6ef0 EFLAGS: 00010246
# [   25.255835] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
# [   25.256298] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
# [   25.256764] RBP: ffffc900006b6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.257229] R10: ffffc900006b7010 R11: ffffffffaecb19b8 R12: 1ffff920000d6de2
# [   25.257696] R13: 00000000000005dc R14: ffffc900006b7010 R15: ffff88800fd4af08
# [   25.258158] FS:  00007fb54043e800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
# [   25.258704] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.259093] CR2: 00000000004e6888 CR3: 000000000e4a8003 CR4: 0000000000772ef0
# [   25.259562] PKRU: 55555554
# [   25.259805] Call Trace:
# [   25.260045]  <TASK>
# [   25.260205] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.260515] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.260847] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   25.261156] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   25.261540] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   25.261868] netif_set_mtu (net/core/dev.c:9652) 
# [   25.262178] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.262496] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   25.262934] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.263174] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.263615] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.263973] do_set_master (net/core/rtnetlink.c:2948) 
# [   25.264285] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.264607] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.264998] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.265307] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.265622] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.265939] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.266251] ? __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) 
# [   25.266559] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.266951] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.267262] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.267570] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   25.267888] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   25.268201] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.268508] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   25.268819] ? __create_object (mm/kmemleak.c:771) 
# [   25.269130] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   25.269439] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   25.269755] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   25.270142] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   25.270459] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   25.270780] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.271088] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.271403] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.271719] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   25.272034] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.272345] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.272663] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   25.272975] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.273287] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.273610] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   25.273920] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.274229] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   25.274549] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   25.274868] ? 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) 
# [   25.275180] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   25.275494] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   25.275818] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   25.276131] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   25.276440] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   25.276756] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
# [   25.277071] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   25.277381] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   25.277697] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   25.278093] ___sys_sendmsg (net/socket.c:2670) 
# [   25.278400] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   25.278715] ? __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) 
# [   25.279100] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   25.279414] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.279736] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.280054] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.280362] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   25.280675] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.280991] __sys_sendmsg (net/socket.c:2700) 
# [   25.281294] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   25.281683] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   25.282015] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.282325] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   25.282644] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   25.283028] RIP: 0033:0x7fb54060b1e7
# [ 25.283350] 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)
# [   25.284462] RSP: 002b:00007ffcd6a70718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   25.284938] RAX: ffffffffffffffda RBX: 00007ffcd6a70e40 RCX: 00007fb54060b1e7
# [   25.285403] RDX: 0000000000000000 RSI: 00007ffcd6a70780 RDI: 0000000000000005
# [   25.285876] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   25.286340] R10: 000000001dcbe910 R11: 0000000000000246 R12: 0000000000000003
# [   25.286807] R13: 00000000686e24b9 R14: 0000000000499600 R15: 0000000000000000
| # [   25.983342] ------------[ cut here ]------------
| # [   25.984154] WARNING: CPU: 3 PID: 323 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) 
| # [   25.984777] Modules linked in: veth bridge stp llc
| # [   25.985732] Tainted: [W]=WARN
# [   25.985965] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.986346] 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) 
# [ 25.986671] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
# [   25.987778] RSP: 0018:ffffc90000776ef0 EFLAGS: 00010246
# [   25.988165] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
# [   25.988631] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
# [   25.989093] RBP: ffffc90000776fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.989556] R10: ffffc90000777010 R11: ffffffffaecb19b8 R12: 1ffff920000eede2
# [   25.990022] R13: 00000000000005dc R14: ffffc90000777010 R15: ffff88800fd4af08
# [   25.990481] FS:  00007f275c9ad800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
# [   25.991024] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.991415] CR2: 00000000004e5770 CR3: 000000000f579004 CR4: 0000000000772ef0
# [   25.991894] PKRU: 55555554
# [   25.992125] Call Trace:
# [   25.992353]  <TASK>
# [   25.992512] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.992826] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.993140] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   25.993445] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   25.993836] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   25.994148] netif_set_mtu (net/core/dev.c:9652) 
# [   25.994453] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.994779] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   25.995210] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.995443] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.995871] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.996228] do_set_master (net/core/rtnetlink.c:2948) 
# [   25.996539] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.996857] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.997243] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.997550] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.997861] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.998177] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.998487] ? __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) 
# [   25.998801] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.999183] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.999492] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.999807] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   26.000113] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   26.000421] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.000742] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   26.001046] ? __create_object (mm/kmemleak.c:771) 
# [   26.001362] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   26.001676] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   26.001992] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   26.002371] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   26.002693] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   26.003009] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   26.003314] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.003632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.003939] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   26.004243] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   26.004549] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   26.004860] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   26.005170] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   26.005483] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.005801] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   26.006112] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   26.006420] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   26.006750] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   26.007057] ? 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) 
# [   26.007365] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   26.007686] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   26.008001] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   26.008313] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   26.008626] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   26.008935] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
# [   26.009248] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   26.009557] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   26.009875] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   26.010270] ___sys_sendmsg (net/socket.c:2670) 
# [   26.010575] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   26.010890] ? __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) 
# [   26.011272] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   26.011583] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.011914] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.012231] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.012539] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   26.012852] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   26.013167] __sys_sendmsg (net/socket.c:2700) 
# [   26.013470] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   26.013858] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   26.014179] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   26.014486] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   26.014807] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   26.015187] RIP: 0033:0x7f275cb7a1e7
# [ 26.015505] 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)
# [   26.016610] RSP: 002b:00007ffc132b9278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   26.017079] RAX: ffffffffffffffda RBX: 00007ffc132b99a0 RCX: 00007f275cb7a1e7
# [   26.017535] RDX: 0000000000000000 RSI: 00007ffc132b92e0 RDI: 0000000000000005
# [   26.018003] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   26.018464] R10: 0000000029a92910 R11: 0000000000000246 R12: 0000000000000003
# [   26.018931] R13: 00000000686e24b9 R14: 0000000000499600 R15: 0000000000000000
| [   23.833529][  T308] c1: entered promiscuous mode
| [   23.836329][  T308] ------------[ cut here ]------------
| [ 23.837767][ T308] WARNING: CPU: 3 PID: 308 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) 
| [   23.838388][  T308] Modules linked in: veth bridge stp llc
[   23.839317][  T308] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.839713][ T308] 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) 
[ 23.840032][ T308] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   23.841140][  T308] RSP: 0018:ffffc90000666ef0 EFLAGS: 00010246
[   23.841531][  T308] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   23.842008][  T308] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   23.842473][  T308] RBP: ffffc90000666fe0 R08: 0000000000000000 R09: 0000000000000000
[   23.842944][  T308] R10: ffffc90000667010 R11: ffffffffae3798a0 R12: 1ffff920000ccde2
[   23.843406][  T308] R13: 00000000000005dc R14: ffffc90000667010 R15: ffff88800fd4af08
[   23.843877][  T308] FS:  00007f91ba9b2800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
[   23.844416][  T308] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.844815][  T308] CR2: 00000000004e6888 CR3: 000000000941c002 CR4: 0000000000772ef0
[   23.845281][  T308] PKRU: 55555554
[   23.845513][  T308] Call Trace:
[   23.845755][  T308]  <TASK>
[ 23.845918][ T308] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.846230][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.846546][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.846866][ T308] netif_set_mtu (net/core/dev.c:9652) 
[ 23.847177][ T308] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.847499][ T308] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.847875][ T308] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 23.848313][ T308] br_add_if (net/bridge/br_if.c:697) bridge 
[ 23.848677][ T308] do_set_master (net/core/rtnetlink.c:2948) 
[ 23.848990][ T308] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 23.849304][ T308] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 23.849700][ T308] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 23.850007][ T308] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 23.850312][ T308] ? __kernel_text_address (kernel/extable.c:79) 
[ 23.850633][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.850944][ T308] ? __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) 
[ 23.851252][ T308] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 23.851640][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.851957][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.852262][ T308] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 23.852569][ T308] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 23.852891][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.853199][ T308] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.853504][ T308] ? __create_object (mm/kmemleak.c:771) 
[ 23.853822][ T308] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 23.854131][ T308] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 23.854439][ T308] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.854829][ T308] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 23.855143][ T308] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.855458][ T308] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.855771][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.856087][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.856393][ T308] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.856705][ T308] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.857017][ T308] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.857325][ T308] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.857642][ T308] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.857958][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.858269][ T308] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.858575][ T308] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.858893][ T308] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.859212][ T308] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.859516][ T308] ? 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) 
[ 23.859841][ T308] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.860153][ T308] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.860467][ T308] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.860784][ T308] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.861092][ T308] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.861398][ T308] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 23.861718][ T308] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.862034][ T308] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.862343][ T308] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.862743][ T308] ___sys_sendmsg (net/socket.c:2670) 
[ 23.863047][ T308] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 23.863354][ T308] ? __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) 
[ 23.863745][ T308] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.864056][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.864367][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.864689][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.864995][ T308] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 23.865300][ T308] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.865625][ T308] __sys_sendmsg (net/socket.c:2700) 
[ 23.865933][ T308] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 23.866312][ T308] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.866639][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.866951][ T308] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.867260][ T308] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.867649][  T308] RIP: 0033:0x7f91bab7f1e7
[ 23.867972][ T308] 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)
[   23.869078][  T308] RSP: 002b:00007fffe2c96588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.869543][  T308] RAX: ffffffffffffffda RBX: 00007fffe2c96cb0 RCX: 00007f91bab7f1e7
[   23.870014][  T308] RDX: 0000000000000000 RSI: 00007fffe2c965f0 RDI: 0000000000000005
[   23.870475][  T308] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   23.870945][  T308] R10: 0000000039621910 R11: 0000000000000246 R12: 0000000000000003
[   23.871409][  T308] R13: 00000000686e24b7 R14: 0000000000499600 R15: 0000000000000000
| [   24.550153][  T313] ------------[ cut here ]------------
| [ 24.550472][ T313] WARNING: CPU: 3 PID: 313 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) 
| [   24.551099][  T313] Modules linked in: veth bridge stp llc
| [   24.552896][  T313] Tainted: [W]=WARN
[   24.553136][  T313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.553518][ T313] 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) 
[ 24.553843][ T313] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   24.554947][  T313] RSP: 0018:ffffc90000646ef0 EFLAGS: 00010246
[   24.555337][  T313] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   24.555805][  T313] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   24.556268][  T313] RBP: ffffc90000646fe0 R08: 0000000000000000 R09: 0000000000000000
[   24.556737][  T313] R10: ffffc90000647010 R11: ffffffffaecb19b8 R12: 1ffff920000c8de2
[   24.557203][  T313] R13: 00000000000005dc R14: ffffc90000647010 R15: ffff88800fd4af08
[   24.557672][  T313] FS:  00007f21be79d800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
[   24.558209][  T313] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.558608][  T313] CR2: 00000000004e6888 CR3: 000000000f55e003 CR4: 0000000000772ef0
[   24.559079][  T313] PKRU: 55555554
[   24.559310][  T313] Call Trace:
[   24.559539][  T313]  <TASK>
[ 24.559706][ T313] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 24.560015][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.560326][ T313] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 24.560640][ T313] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 24.561022][ T313] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 24.561334][ T313] netif_set_mtu (net/core/dev.c:9652) 
[ 24.561650][ T313] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 24.561978][ T313] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 24.562406][ T313] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 24.562649][ T313] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 24.563070][ T313] br_add_if (net/bridge/br_if.c:697) bridge 
[ 24.563428][ T313] do_set_master (net/core/rtnetlink.c:2948) 
[ 24.563748][ T313] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 24.564061][ T313] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 24.564450][ T313] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.564765][ T313] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 24.565070][ T313] ? __kernel_text_address (kernel/extable.c:79) 
[ 24.565385][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.565705][ T313] ? __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) 
[ 24.566012][ T313] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 24.566392][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.566708][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.567016][ T313] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 24.567323][ T313] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 24.567640][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.567948][ T313] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 24.568255][ T313] ? __create_object (mm/kmemleak.c:771) 
[ 24.568562][ T313] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 24.568881][ T313] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 24.569189][ T313] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 24.569568][ T313] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 24.569890][ T313] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 24.570203][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.570512][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.570836][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.571144][ T313] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 24.571448][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.571770][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.572078][ T313] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 24.572386][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.572706][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.573025][ T313] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 24.573333][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.573651][ T313] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 24.573972][ T313] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.574279][ T313] ? 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) 
[ 24.574601][ T313] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.574917][ T313] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.575237][ T313] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.575551][ T313] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.575868][ T313] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.576179][ T313] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 24.576491][ T313] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.576807][ T313] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.577115][ T313] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.577512][ T313] ___sys_sendmsg (net/socket.c:2670) 
[ 24.577827][ T313] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 24.578134][ T313] ? __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) 
[ 24.578518][ T313] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.578836][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.579148][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.579460][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.579778][ T313] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 24.580085][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.580398][ T313] __sys_sendmsg (net/socket.c:2700) 
[ 24.580714][ T313] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 24.581095][ T313] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.581414][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.581736][ T313] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.582049][ T313] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.582431][  T313] RIP: 0033:0x7f21be96a1e7
[ 24.582759][ T313] 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)
[   24.583863][  T313] RSP: 002b:00007ffcbba815b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.584330][  T313] RAX: ffffffffffffffda RBX: 00007ffcbba81ce0 RCX: 00007f21be96a1e7
[   24.584799][  T313] RDX: 0000000000000000 RSI: 00007ffcbba81620 RDI: 0000000000000005
[   24.585258][  T313] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   24.585725][  T313] R10: 00000000036cd910 R11: 0000000000000246 R12: 0000000000000003
[   24.586190][  T313] R13: 00000000686e24b8 R14: 0000000000499600 R15: 0000000000000000
| [   25.251473][  T318] ------------[ cut here ]------------
| [ 25.251807][ T318] WARNING: CPU: 3 PID: 318 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) 
| [   25.252418][  T318] Modules linked in: veth bridge stp llc
| [   25.253378][  T318] Tainted: [W]=WARN
[   25.253620][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.254006][ T318] 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) 
[ 25.254323][ T318] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   25.255436][  T318] RSP: 0018:ffffc900006b6ef0 EFLAGS: 00010246
[   25.255835][  T318] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   25.256298][  T318] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   25.256764][  T318] RBP: ffffc900006b6fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.257229][  T318] R10: ffffc900006b7010 R11: ffffffffaecb19b8 R12: 1ffff920000d6de2
[   25.257696][  T318] R13: 00000000000005dc R14: ffffc900006b7010 R15: ffff88800fd4af08
[   25.258158][  T318] FS:  00007fb54043e800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
[   25.258704][  T318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.259093][  T318] CR2: 00000000004e6888 CR3: 000000000e4a8003 CR4: 0000000000772ef0
[   25.259562][  T318] PKRU: 55555554
[   25.259805][  T318] Call Trace:
[   25.260045][  T318]  <TASK>
[ 25.260205][ T318] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.260515][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.260847][ T318] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 25.261156][ T318] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 25.261540][ T318] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 25.261868][ T318] netif_set_mtu (net/core/dev.c:9652) 
[ 25.262178][ T318] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.262496][ T318] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 25.262934][ T318] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.263174][ T318] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.263615][ T318] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.263973][ T318] do_set_master (net/core/rtnetlink.c:2948) 
[ 25.264285][ T318] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.264607][ T318] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.264998][ T318] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.265307][ T318] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.265622][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.265939][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.266251][ T318] ? __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) 
[ 25.266559][ T318] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.266951][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.267262][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.267570][ T318] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 25.267888][ T318] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 25.268201][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.268508][ T318] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 25.268819][ T318] ? __create_object (mm/kmemleak.c:771) 
[ 25.269130][ T318] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 25.269439][ T318] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 25.269755][ T318] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 25.270142][ T318] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 25.270459][ T318] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 25.270780][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.271088][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.271403][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.271719][ T318] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 25.272034][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.272345][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.272663][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 25.272975][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.273287][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.273610][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 25.273920][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.274229][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 25.274549][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 25.274868][ T318] ? 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) 
[ 25.275180][ T318] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 25.275494][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 25.275818][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 25.276131][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 25.276440][ T318] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 25.276756][ T318] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 25.277071][ T318] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 25.277381][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 25.277697][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 25.278093][ T318] ___sys_sendmsg (net/socket.c:2670) 
[ 25.278400][ T318] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 25.278715][ T318] ? __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) 
[ 25.279100][ T318] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 25.279414][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.279736][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.280054][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.280362][ T318] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 25.280675][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.280991][ T318] __sys_sendmsg (net/socket.c:2700) 
[ 25.281294][ T318] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 25.281683][ T318] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 25.282015][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.282325][ T318] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.282644][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.283028][  T318] RIP: 0033:0x7fb54060b1e7
[ 25.283350][ T318] 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)
[   25.284462][  T318] RSP: 002b:00007ffcd6a70718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.284938][  T318] RAX: ffffffffffffffda RBX: 00007ffcd6a70e40 RCX: 00007fb54060b1e7
[   25.285403][  T318] RDX: 0000000000000000 RSI: 00007ffcd6a70780 RDI: 0000000000000005
[   25.285876][  T318] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   25.286340][  T318] R10: 000000001dcbe910 R11: 0000000000000246 R12: 0000000000000003
[   25.286807][  T318] R13: 00000000686e24b9 R14: 0000000000499600 R15: 0000000000000000
| [   25.983342][  T323] ------------[ cut here ]------------
| [ 25.984154][ T323] WARNING: CPU: 3 PID: 323 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) 
| [   25.984777][  T323] Modules linked in: veth bridge stp llc
| [   25.985732][  T323] Tainted: [W]=WARN
[   25.985965][  T323] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.986346][ T323] 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) 
[ 25.986671][ T323] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   25.987778][  T323] RSP: 0018:ffffc90000776ef0 EFLAGS: 00010246
[   25.988165][  T323] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   25.988631][  T323] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   25.989093][  T323] RBP: ffffc90000776fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.989556][  T323] R10: ffffc90000777010 R11: ffffffffaecb19b8 R12: 1ffff920000eede2
[   25.990022][  T323] R13: 00000000000005dc R14: ffffc90000777010 R15: ffff88800fd4af08
[   25.990481][  T323] FS:  00007f275c9ad800(0000) GS:ffff88807f427000(0000) knlGS:0000000000000000
[   25.991024][  T323] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.991415][  T323] CR2: 00000000004e5770 CR3: 000000000f579004 CR4: 0000000000772ef0
[   25.991894][  T323] PKRU: 55555554
[   25.992125][  T323] Call Trace:
[   25.992353][  T323]  <TASK>
[ 25.992512][ T323] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.992826][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.993140][ T323] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 25.993445][ T323] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 25.993836][ T323] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 25.994148][ T323] netif_set_mtu (net/core/dev.c:9652) 
[ 25.994453][ T323] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.994779][ T323] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 25.995210][ T323] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.995443][ T323] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.995871][ T323] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.996228][ T323] do_set_master (net/core/rtnetlink.c:2948) 
[ 25.996539][ T323] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.996857][ T323] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.997243][ T323] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.997550][ T323] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.997861][ T323] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.998177][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.998487][ T323] ? __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) 
[ 25.998801][ T323] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.999183][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.999492][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.999807][ T323] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 26.000113][ T323] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 26.000421][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.000742][ T323] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 26.001046][ T323] ? __create_object (mm/kmemleak.c:771) 
[ 26.001362][ T323] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 26.001676][ T323] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 26.001992][ T323] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 26.002371][ T323] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 26.002693][ T323] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 26.003009][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 26.003314][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.003632][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.003939][ T323] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 26.004243][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 26.004549][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 26.004860][ T323] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 26.005170][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 26.005483][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.005801][ T323] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 26.006112][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 26.006420][ T323] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 26.006750][ T323] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 26.007057][ T323] ? 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) 
[ 26.007365][ T323] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 26.007686][ T323] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 26.008001][ T323] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 26.008313][ T323] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 26.008626][ T323] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 26.008935][ T323] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 26.009248][ T323] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 26.009557][ T323] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 26.009875][ T323] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 26.010270][ T323] ___sys_sendmsg (net/socket.c:2670) 
[ 26.010575][ T323] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 26.010890][ T323] ? __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) 
[ 26.011272][ T323] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 26.011583][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.011914][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.012231][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.012539][ T323] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 26.012852][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 26.013167][ T323] __sys_sendmsg (net/socket.c:2700) 
[ 26.013470][ T323] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 26.013858][ T323] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 26.014179][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 26.014486][ T323] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 26.014807][ T323] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.015187][  T323] RIP: 0033:0x7f275cb7a1e7
[ 26.015505][ T323] 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)
[   26.016610][  T323] RSP: 002b:00007ffc132b9278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   26.017079][  T323] RAX: ffffffffffffffda RBX: 00007ffc132b99a0 RCX: 00007f275cb7a1e7
[   26.017535][  T323] RDX: 0000000000000000 RSI: 00007ffc132b92e0 RDI: 0000000000000005
[   26.018003][  T323] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   26.018464][  T323] R10: 0000000029a92910 R11: 0000000000000246 R12: 0000000000000003
[   26.018931][  T323] R13: 00000000686e24b9 R14: 0000000000499600 R15: 0000000000000000
| [   40.784791][   T69] ------------[ cut here ]------------
| [ 40.785151][ T69] WARNING: CPU: 2 PID: 69 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) 
| [   40.785850][   T69] Modules linked in: nf_conntrack_netlink nfnetlink_queue nft_queue nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br_netfilter veth bridge stp llc
| [   40.787682][   T69] Tainted: [W]=WARN
[   40.787936][   T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   40.788351][   T69] Workqueue: netns cleanup_net
[ 40.788725][ T69] 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) 
[ 40.789080][ T69] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   40.790224][   T69] RSP: 0018:ffffc900004a75b0 EFLAGS: 00010246
[   40.790650][   T69] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   40.791142][   T69] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   40.791636][   T69] RBP: ffffc900004a76a0 R08: 0000000000000000 R09: 0000000000000000
[   40.792130][   T69] R10: ffffc900004a76d0 R11: ffffffffaaa914d8 R12: 1ffff92000094eba
[   40.792622][   T69] R13: 00000000000005dc R14: ffffc900004a76d0 R15: ffff88800fd4af08
[   40.793108][   T69] FS:  0000000000000000(0000) GS:ffff88807f3a7000(0000) knlGS:0000000000000000
[   40.793679][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.794085][   T69] CR2: 00007f815e1332a8 CR3: 000000000f999002 CR4: 0000000000772ef0
[   40.794567][   T69] PKRU: 55555554
[   40.794835][   T69] Call Trace:
[   40.795082][   T69]  <TASK>
[ 40.795275][ T69] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 40.795616][ T69] ? __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) 
[ 40.796030][ T69] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 40.796404][ T69] ? br_device_event (net/bridge/br.c:141) bridge 
[ 40.796778][ T69] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 40.797106][ T69] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 40.797436][ T69] ? cleanup_net (net/core/net_namespace.c:684) 
[ 40.797775][ T69] ? process_one_work (kernel/workqueue.c:3238) 
[ 40.798109][ T69] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 40.798429][ T69] ? kthread (kernel/kthread.c:464) 
[ 40.798700][ T69] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 40.799022][ T69] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 40.799350][ T69] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 40.799713][ T69] netif_set_mtu (net/core/dev.c:9652) 
[ 40.800037][ T69] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 40.800379][ T69] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 40.800648][ T69] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 40.801099][ T69] br_del_if (net/bridge/br_if.c:743) bridge 
[ 40.801463][ T69] br_device_event (net/bridge/br.c:141) bridge 
[ 40.801846][ T69] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 40.802276][ T69] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 40.802616][ T69] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 40.802954][ T69] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 40.803362][ T69] ? 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) 
[ 40.803700][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 40.804096][ T69] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 40.804492][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 40.804907][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 40.805322][ T69] default_device_exit_batch (net/core/dev.c:12673) 
[ 40.805658][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 40.806061][ T69] ? 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) 
[ 40.806386][ T69] ? __pfx_nexthop_net_exit_rtnl (net/ipv4/nexthop.c:4055) 
[ 40.806799][ T69] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 40.807127][ T69] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 40.807449][ T69] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 40.807801][ T69] cleanup_net (net/core/net_namespace.c:684) 
[ 40.808130][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 40.808458][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 40.808789][ T69] process_one_work (kernel/workqueue.c:3238) 
[ 40.809131][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 40.809473][ T69] ? assign_work (kernel/workqueue.c:1200) 
[ 40.809817][ T69] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 40.810149][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 40.810478][ T69] kthread (kernel/kthread.c:464) 
[ 40.810743][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.811068][ T69] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 40.811390][ T69] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 40.811720][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 40.812048][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.812383][ T69] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 40.812711][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.813042][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   41.301069][   T69] ------------[ cut here ]------------
| [ 41.301428][ T69] WARNING: CPU: 1 PID: 69 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) 
| [   41.302129][   T69] Modules linked in: nf_conntrack_netlink nfnetlink_queue nft_queue nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br_netfilter veth bridge stp llc
| [   41.303879][   T69] Tainted: [W]=WARN
[   41.304111][   T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   41.304497][   T69] Workqueue: netns cleanup_net
[ 41.304828][ T69] 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) 
[ 41.305145][ T69] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   41.306256][   T69] RSP: 0018:ffffc900004a75b0 EFLAGS: 00010246
[   41.306653][   T69] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   41.307114][   T69] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   41.307576][   T69] RBP: ffffc900004a76a0 R08: 0000000000000000 R09: 0000000000000000
[   41.308045][   T69] R10: ffffc900004a76d0 R11: ffffffffae3798a0 R12: 1ffff92000094eba
[   41.308505][   T69] R13: 00000000000005dc R14: ffffc900004a76d0 R15: ffff88800fd4af08
[   41.308972][   T69] FS:  0000000000000000(0000) GS:ffff88807f327000(0000) knlGS:0000000000000000
[   41.309512][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.309909][   T69] CR2: 00007ffc92f2d7f8 CR3: 000000000942f003 CR4: 0000000000772ef0
[   41.310371][   T69] PKRU: 55555554
[   41.310612][   T69] Call Trace:
[   41.310842][   T69]  <TASK>
[ 41.310996][ T69] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 41.311304][ T69] ? __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) 
[ 41.311697][ T69] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 41.312056][ T69] ? br_device_event (net/bridge/br.c:141) bridge 
[ 41.312398][ T69] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 41.312714][ T69] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.313020][ T69] ? cleanup_net (net/core/net_namespace.c:684) 
[ 41.313323][ T69] ? process_one_work (kernel/workqueue.c:3238) 
[ 41.313637][ T69] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.313945][ T69] ? kthread (kernel/kthread.c:464) 
[ 41.314176][ T69] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.314480][ T69] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 41.314798][ T69] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 41.315117][ T69] netif_set_mtu (net/core/dev.c:9652) 
[ 41.315422][ T69] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 41.315759][ T69] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 41.315993][ T69] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 41.316418][ T69] br_del_if (net/bridge/br_if.c:743) bridge 
[ 41.316773][ T69] br_device_event (net/bridge/br.c:141) bridge 
[ 41.317118][ T69] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 41.317533][ T69] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 41.317856][ T69] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 41.318171][ T69] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 41.318558][ T69] ? 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) 
[ 41.318875][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 41.319256][ T69] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 41.319643][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.320024][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.320411][ T69] default_device_exit_batch (net/core/dev.c:12673) 
[ 41.320726][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 41.321117][ T69] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.321431][ T69] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 41.321749][ T69] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 41.322068][ T69] cleanup_net (net/core/net_namespace.c:684) 
[ 41.322375][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 41.322692][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.323004][ T69] process_one_work (kernel/workqueue.c:3238) 
[ 41.323328][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 41.323656][ T69] ? assign_work (kernel/workqueue.c:1200) 
[ 41.323967][ T69] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.324282][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 41.324608][ T69] kthread (kernel/kthread.c:464) 
[ 41.324841][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.325147][ T69] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 41.325454][ T69] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 41.325776][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.326082][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.326391][ T69] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.326704][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.327011][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   41.863471][   T69] ------------[ cut here ]------------
| [ 41.863811][ T69] WARNING: CPU: 0 PID: 69 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) 
| [   41.864345][   T69] Modules linked in: nf_conntrack_netlink nfnetlink_queue nft_queue nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br_netfilter veth bridge stp llc
| [   41.866017][   T69] Tainted: [W]=WARN
[   41.866253][   T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   41.866651][   T69] Workqueue: netns cleanup_net
[ 41.866974][ T69] 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) 
[ 41.867293][ T69] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   41.868416][   T69] RSP: 0018:ffffc900004a75b0 EFLAGS: 00010246
[   41.868817][   T69] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   41.869282][   T69] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   41.869759][   T69] RBP: ffffc900004a76a0 R08: 0000000000000000 R09: 0000000000000000
[   41.870239][   T69] R10: ffffc900004a76d0 R11: ffffffffae3798a0 R12: 1ffff92000094eba
[   41.870713][   T69] R13: 00000000000005dc R14: ffffc900004a76d0 R15: ffff88800fd4af08
[   41.871179][   T69] FS:  0000000000000000(0000) GS:ffff88807f2a7000(0000) knlGS:0000000000000000
[   41.871732][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.872135][   T69] CR2: 00007fd389e78000 CR3: 0000000037336002 CR4: 0000000000772ef0
[   41.872615][   T69] PKRU: 55555554
[   41.872849][   T69] Call Trace:
[   41.873088][   T69]  <TASK>
[ 41.873244][ T69] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 41.873556][ T69] ? __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) 
[ 41.873954][ T69] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 41.874310][ T69] ? br_device_event (net/bridge/br.c:141) bridge 
[ 41.874669][ T69] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 41.874979][ T69] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.875289][ T69] ? cleanup_net (net/core/net_namespace.c:684) 
[ 41.875606][ T69] ? process_one_work (kernel/workqueue.c:3238) 
[ 41.875918][ T69] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.876235][ T69] ? kthread (kernel/kthread.c:464) 
[ 41.876474][ T69] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.876794][ T69] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 41.877105][ T69] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 41.877425][ T69] netif_set_mtu (net/core/dev.c:9652) 
[ 41.877748][ T69] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 41.878076][ T69] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 41.878311][ T69] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 41.878747][ T69] br_del_if (net/bridge/br_if.c:743) bridge 
[ 41.879095][ T69] br_device_event (net/bridge/br.c:141) bridge 
[ 41.879440][ T69] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 41.879973][ T69] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 41.880299][ T69] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 41.880629][ T69] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 41.881023][ T69] ? 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) 
[ 41.881331][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 41.881728][ T69] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 41.882123][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.882508][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.882924][ T69] default_device_exit_batch (net/core/dev.c:12673) 
[ 41.883234][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 41.883637][ T69] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.883964][ T69] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 41.884271][ T69] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 41.884601][ T69] cleanup_net (net/core/net_namespace.c:684) 
[ 41.884914][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 41.885235][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.885548][ T69] process_one_work (kernel/workqueue.c:3238) 
[ 41.885882][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 41.886202][ T69] ? assign_work (kernel/workqueue.c:1200) 
[ 41.886519][ T69] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.886847][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 41.887157][ T69] kthread (kernel/kthread.c:464) 
[ 41.887393][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.887713][ T69] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 41.888023][ T69] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 41.888334][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.888651][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.888964][ T69] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.889272][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.889579][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   42.339941][   T69] ------------[ cut here ]------------
| [ 42.340279][ T69] WARNING: CPU: 2 PID: 69 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) 
| [   42.340856][   T69] Modules linked in: nf_conntrack_netlink nfnetlink_queue nft_queue nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br_netfilter veth bridge stp llc
| [   42.342560][   T69] Tainted: [W]=WARN
[   42.342828][   T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.343228][   T69] Workqueue: netns cleanup_net
[ 42.343563][ T69] 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) 
[ 42.343914][ T69] Code: 00 00 8b 05 87 1c 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 ca d1 79 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 87 1c 38 02    	mov    0x2381c87(%rip),%eax        # 0x2381c8f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 ca d1 79 00       	call   0x79d1eb
  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
[   42.345049][   T69] RSP: 0000:ffffc900004a75b0 EFLAGS: 00010246
[   42.345458][   T69] RAX: 0000000000000000 RBX: ffff88800fd4a000 RCX: 0000000000000001
[   42.345955][   T69] RDX: 0000000000000000 RSI: ffffffffade9f52e RDI: ffffffffad65a5a0
[   42.346428][   T69] RBP: ffffc900004a76a0 R08: 0000000000000000 R09: 0000000000000000
[   42.346911][   T69] R10: ffffc900004a76d0 R11: ffffffffae3798a0 R12: 1ffff92000094eba
[   42.347386][   T69] R13: 00000000000005dc R14: ffffc900004a76d0 R15: ffff88800fd4af08
[   42.347873][   T69] FS:  0000000000000000(0000) GS:ffff88807f3a7000(0000) knlGS:0000000000000000
[   42.348427][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.348844][   T69] CR2: 00007f8ffbd60fe0 CR3: 0000000037336002 CR4: 0000000000772ef0
[   42.349324][   T69] PKRU: 55555554
[   42.349569][   T69] Call Trace:
[   42.349827][   T69]  <TASK>
[ 42.349997][ T69] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 42.350317][ T69] ? __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) 
[ 42.350721][ T69] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 42.351085][ T69] ? br_device_event (net/bridge/br.c:141) bridge 
[ 42.351441][ T69] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 42.351784][ T69] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 42.352117][ T69] ? cleanup_net (net/core/net_namespace.c:684) 
[ 42.352438][ T69] ? process_one_work (kernel/workqueue.c:3238) 
[ 42.352772][ T69] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.353092][ T69] ? kthread (kernel/kthread.c:464) 
[ 42.353336][ T69] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.353668][ T69] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 42.353994][ T69] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.354329][ T69] netif_set_mtu (net/core/dev.c:9652) 
[ 42.354667][ T69] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 42.355010][ T69] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 42.355258][ T69] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 42.355708][ T69] br_del_if (net/bridge/br_if.c:743) bridge 
[ 42.356065][ T69] br_device_event (net/bridge/br.c:141) bridge 
[ 42.356422][ T69] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 42.356858][ T69] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 42.357195][ T69] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 42.357528][ T69] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 42.357942][ T69] ? 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) 
[ 42.358264][ T69] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 42.358671][ T69] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 42.359061][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.359463][ T69] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.359876][ T69] default_device_exit_batch (net/core/dev.c:12673) 
[ 42.360198][ T69] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 42.360620][ T69] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 42.360950][ T69] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 42.361267][ T69] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 42.361605][ T69] cleanup_net (net/core/net_namespace.c:684) 
[ 42.361944][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 42.362270][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.362608][ T69] process_one_work (kernel/workqueue.c:3238) 
[ 42.362944][ T69] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 42.363274][ T69] ? assign_work (kernel/workqueue.c:1200) 
[ 42.363608][ T69] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.363938][ T69] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 42.364264][ T69] kthread (kernel/kthread.c:464) 
[ 42.364515][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.364846][ T69] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 42.365174][ T69] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 42.365501][ T69] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.365832][ T69] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.366157][ T69] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.366479][ T69] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
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