======================================
| # [   23.742564] c1: entered promiscuous mode
| # [   23.745422] ------------[ cut here ]------------
| # [   23.745737] WARNING: CPU: 0 PID: 307 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) 
| # [   23.746781] Modules linked in: veth bridge stp llc
# [   23.747772] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   23.748188] 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) 
# [ 23.748513] 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
# [   23.749664] RSP: 0018:ffffc900005b6ef0 EFLAGS: 00010246
# [   23.750059] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
# [   23.750549] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
# [   23.751009] RBP: ffffc900005b6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   23.751603] R10: ffffc900005b7010 R11: ffffffffb5f798a0 R12: 1ffff920000b6de2
# [   23.752064] R13: 00000000000005dc R14: ffffc900005b7010 R15: ffff8880110a2f08
# [   23.752554] FS:  00007f45be763800(0000) GS:ffff8880776a7000(0000) knlGS:0000000000000000
# [   23.753099] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   23.753531] CR2: 00000000004e6888 CR3: 000000000505e002 CR4: 0000000000772ef0
# [   23.753997] PKRU: 55555554
# [   23.754260] Call Trace:
# [   23.754496]  <TASK>
# [   23.754658] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   23.754969] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.755311] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.755636] netif_set_mtu (net/core/dev.c:9652) 
# [   23.755945] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   23.756293] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   23.756527] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   23.756953] br_add_if (net/bridge/br_if.c:697) bridge 
# [   23.757342] do_set_master (net/core/rtnetlink.c:2948) 
# [   23.757656] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   23.757979] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   23.758399] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   23.758706] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   23.759009] ? __kernel_text_address (kernel/extable.c:79) 
# [   23.759340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.759652] ? __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) 
# [   23.759971] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   23.760372] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.760688] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.760993] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   23.761307] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   23.761635] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.761953] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   23.762266] ? __create_object (mm/kmemleak.c:771) 
# [   23.762594] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   23.762901] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   23.763220] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   23.763616] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   23.763944] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   23.764265] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   23.764581] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.764891] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.765216] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   23.765535] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   23.765844] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   23.766170] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   23.766489] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   23.766799] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.767129] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   23.767436] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   23.767766] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   23.768098] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   23.768416] ? 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) 
# [   23.768739] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   23.769050] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   23.769377] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   23.769699] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   23.770004] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   23.770325] ? _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) 
# [   23.770648] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   23.770954] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   23.771267] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   23.771671] ___sys_sendmsg (net/socket.c:2670) 
# [   23.771974] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   23.772290] ? __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) 
# [   23.772686] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   23.772995] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.773322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   23.773659] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   23.773965] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   23.774280] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   23.774597] __sys_sendmsg (net/socket.c:2700) 
# [   23.774910] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   23.775297] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   23.775625] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   23.775940] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   23.776258] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   23.776650] RIP: 0033:0x7f45be9301e7
# [ 23.776973] 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)
# [   23.778089] RSP: 002b:00007fff70ef70a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   23.778577] RAX: ffffffffffffffda RBX: 00007fff70ef77d0 RCX: 00007f45be9301e7
# [   23.779054] RDX: 0000000000000000 RSI: 00007fff70ef7110 RDI: 0000000000000005
# [   23.779798] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   23.780266] R10: 0000000008af0910 R11: 0000000000000246 R12: 0000000000000003
# [   23.780742] R13: 00000000686e4d95 R14: 0000000000499600 R15: 0000000000000000
| # [   24.459479] ------------[ cut here ]------------
| # [   24.459820] WARNING: CPU: 2 PID: 312 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) 
| # [   24.460464] Modules linked in: veth bridge stp llc
| # [   24.461804] Tainted: [W]=WARN
# [   24.462055] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   24.462460] 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) 
# [ 24.462791] 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
# [   24.463913] RSP: 0018:ffffc900005f6ef0 EFLAGS: 00010246
# [   24.464325] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
# [   24.464797] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
# [   24.465285] RBP: ffffc900005f6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   24.465759] R10: ffffc900005f7010 R11: ffffffffb68b19b8 R12: 1ffff920000bede2
# [   24.466237] R13: 00000000000005dc R14: ffffc900005f7010 R15: ffff8880110a2f08
# [   24.466711] FS:  00007f551bb3f800(0000) GS:ffff8880777a7000(0000) knlGS:0000000000000000
# [   24.467288] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   24.467689] CR2: 00000000004e6888 CR3: 000000000f8d1004 CR4: 0000000000772ef0
# [   24.468183] PKRU: 55555554
# [   24.468426] Call Trace:
# [   24.468673]  <TASK>
# [   24.468847] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   24.469179] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.469507] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   24.469828] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   24.470253] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   24.470578] netif_set_mtu (net/core/dev.c:9652) 
# [   24.470896] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   24.471236] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   24.471678] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   24.471928] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   24.472386] br_add_if (net/bridge/br_if.c:697) bridge 
# [   24.472755] do_set_master (net/core/rtnetlink.c:2948) 
# [   24.473077] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   24.473410] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   24.473810] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   24.474138] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   24.474457] ? __kernel_text_address (kernel/extable.c:79) 
# [   24.474796] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.475125] ? __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) 
# [   24.475446] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   24.475835] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.476164] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.476480] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   24.476814] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   24.477141] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.477460] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   24.477774] ? __create_object (mm/kmemleak.c:771) 
# [   24.478095] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   24.478429] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   24.478764] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   24.479167] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   24.479494] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   24.479817] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   24.480145] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.480470] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.480790] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   24.481127] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   24.481448] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   24.481769] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   24.482091] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   24.482421] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.482744] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   24.483123] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   24.483477] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   24.483809] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   24.484150] ? 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) 
# [   24.484505] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   24.484833] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   24.485170] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   24.485499] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   24.485817] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   24.486149] ? _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) 
# [   24.486473] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   24.486799] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   24.487125] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   24.487536] ___sys_sendmsg (net/socket.c:2670) 
# [   24.487852] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   24.488188] ? __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) 
# [   24.488585] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   24.488911] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.489243] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   24.489571] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   24.489890] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   24.490218] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   24.490544] __sys_sendmsg (net/socket.c:2700) 
# [   24.490861] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   24.491261] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   24.491601] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   24.491922] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   24.492255] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   24.492645] RIP: 0033:0x7f551bd0c1e7
# [ 24.492975] 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)
# [   24.494093] RSP: 002b:00007fff60b08058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   24.494574] RAX: ffffffffffffffda RBX: 00007fff60b08780 RCX: 00007f551bd0c1e7
# [   24.495046] RDX: 0000000000000000 RSI: 00007fff60b080c0 RDI: 0000000000000005
# [   24.495525] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   24.495998] R10: 0000000003b22910 R11: 0000000000000246 R12: 0000000000000003
# [   24.496478] R13: 00000000686e4d96 R14: 0000000000499600 R15: 0000000000000000
| # [   25.172628] ------------[ cut here ]------------
| # [   25.172938] WARNING: CPU: 3 PID: 317 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) 
| # [   25.173558] Modules linked in: veth bridge stp llc
| # [   25.174515] Tainted: [W]=WARN
# [   25.174750] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.175141] 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) 
# [ 25.175460] 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
# [   25.176792] RSP: 0018:ffffc900006a6ef0 EFLAGS: 00010246
# [   25.177331] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
# [   25.177794] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
# [   25.178486] RBP: ffffc900006a6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.178954] R10: ffffc900006a7010 R11: ffffffffb68b19b8 R12: 1ffff920000d4de2
# [   25.179563] R13: 00000000000005dc R14: ffffc900006a7010 R15: ffff8880110a2f08
# [   25.180024] FS:  00007fd78be71800(0000) GS:ffff888077827000(0000) knlGS:0000000000000000
# [   25.180585] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.180982] CR2: 00000000004e6888 CR3: 000000000f96f001 CR4: 0000000000772ef0
# [   25.181470] PKRU: 55555554
# [   25.181708] Call Trace:
# [   25.181939]  <TASK>
# [   25.182101] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.182423] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.182735] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   25.183045] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   25.183437] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   25.183755] netif_set_mtu (net/core/dev.c:9652) 
# [   25.184063] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.184401] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   25.184833] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.185069] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.185504] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.185869] do_set_master (net/core/rtnetlink.c:2948) 
# [   25.186190] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.186503] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.186890] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.187207] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.187513] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.187825] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.188162] ? __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) 
# [   25.188479] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.188878] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.189200] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.189508] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   25.189815] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   25.190137] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.190448] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   25.190751] ? __create_object (mm/kmemleak.c:771) 
# [   25.191061] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   25.191379] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   25.191690] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   25.192074] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   25.192406] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   25.192728] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.193037] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.193362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.193677] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   25.193984] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.194299] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.194606] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   25.194914] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.195236] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.195558] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   25.195864] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.196191] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   25.196514] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   25.196819] ? 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) 
# [   25.197141] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   25.197450] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   25.197765] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   25.198073] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   25.198398] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   25.198707] ? _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) 
# [   25.199017] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   25.199338] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   25.199643] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   25.200035] ___sys_sendmsg (net/socket.c:2670) 
# [   25.200356] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   25.200668] ? __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) 
# [   25.201048] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   25.201370] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.201681] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.201990] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.202307] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   25.202611] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.202925] __sys_sendmsg (net/socket.c:2700) 
# [   25.203238] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   25.203627] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   25.203945] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.204271] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   25.204586] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   25.204963] RIP: 0033:0x7fd78c03e1e7
# [ 25.205288] 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)
# [   25.206392] RSP: 002b:00007ffd8bd9aa28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   25.206855] RAX: ffffffffffffffda RBX: 00007ffd8bd9b150 RCX: 00007fd78c03e1e7
# [   25.207323] RDX: 0000000000000000 RSI: 00007ffd8bd9aa90 RDI: 0000000000000005
# [   25.207790] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   25.208276] R10: 000000000fb8d910 R11: 0000000000000246 R12: 0000000000000003
# [   25.208776] R13: 00000000686e4d96 R14: 0000000000499600 R15: 0000000000000000
| # [   25.887673] ------------[ cut here ]------------
| # [   25.888005] WARNING: CPU: 2 PID: 322 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) 
| # [   25.888658] Modules linked in: veth bridge stp llc
| # [   25.890341] Tainted: [W]=WARN
# [   25.890590] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.890986] 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) 
# [ 25.891330] 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
# [   25.892462] RSP: 0018:ffffc90000726ef0 EFLAGS: 00010246
# [   25.892874] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
# [   25.893354] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
# [   25.893831] RBP: ffffc90000726fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.894310] R10: ffffc90000727010 R11: ffffffffb68b19b8 R12: 1ffff920000e4de2
# [   25.894778] R13: 00000000000005dc R14: ffffc90000727010 R15: ffff8880110a2f08
# [   25.895258] FS:  00007f783bdc1800(0000) GS:ffff8880777a7000(0000) knlGS:0000000000000000
# [   25.895829] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.896248] CR2: 00000000004e5770 CR3: 000000000f9b4004 CR4: 0000000000772ef0
# [   25.896724] PKRU: 55555554
# [   25.896968] Call Trace:
# [   25.897219]  <TASK>
# [   25.897390] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.897723] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.898049] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   25.898408] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   25.898804] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   25.899135] netif_set_mtu (net/core/dev.c:9652) 
# [   25.899458] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.899788] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   25.900267] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.900530] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.900973] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.901348] do_set_master (net/core/rtnetlink.c:2948) 
# [   25.901673] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.901995] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.902421] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.902738] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.903061] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.903395] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.903717] ? __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) 
# [   25.904034] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.904464] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.904788] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.905104] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   25.905439] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   25.905760] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.906076] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   25.906415] ? __create_object (mm/kmemleak.c:771) 
# [   25.906731] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   25.907051] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   25.907376] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   25.907766] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   25.908093] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   25.908446] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.908779] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.909101] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.909433] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   25.909746] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.910065] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.910391] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   25.910718] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.911038] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.911372] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   25.911691] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.912010] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   25.912360] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   25.912677] ? 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) 
# [   25.913251] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
# [   25.913575] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   25.913900] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   25.914232] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   25.914553] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   25.914871] ? _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) 
# [   25.915207] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   25.915529] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   25.915849] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   25.916272] ___sys_sendmsg (net/socket.c:2670) 
# [   25.916590] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   25.916906] ? __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) 
# [   25.917312] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   25.917633] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.917957] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.918306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.918627] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   25.918942] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.919278] __sys_sendmsg (net/socket.c:2700) 
# [   25.919598] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   25.919988] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   25.920343] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.920665] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   25.920984] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   25.921384] RIP: 0033:0x7f783bf8e1e7
# [ 25.921712] 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)
# [   25.922827] RSP: 002b:00007ffed87af708 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   25.923308] RAX: ffffffffffffffda RBX: 00007ffed87afe30 RCX: 00007f783bf8e1e7
# [   25.923782] RDX: 0000000000000000 RSI: 00007ffed87af770 RDI: 0000000000000005
# [   25.924270] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   25.924750] R10: 000000002a739910 R11: 0000000000000246 R12: 0000000000000003
# [   25.925229] R13: 00000000686e4d97 R14: 0000000000499600 R15: 0000000000000000
| [   23.742564][  T307] c1: entered promiscuous mode
| [   23.745422][  T307] ------------[ cut here ]------------
| [ 23.745737][ T307] WARNING: CPU: 0 PID: 307 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) 
| [   23.746781][  T307] Modules linked in: veth bridge stp llc
[   23.747772][  T307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.748188][ T307] 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) 
[ 23.748513][ T307] 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
[   23.749664][  T307] RSP: 0018:ffffc900005b6ef0 EFLAGS: 00010246
[   23.750059][  T307] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   23.750549][  T307] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   23.751009][  T307] RBP: ffffc900005b6fe0 R08: 0000000000000000 R09: 0000000000000000
[   23.751603][  T307] R10: ffffc900005b7010 R11: ffffffffb5f798a0 R12: 1ffff920000b6de2
[   23.752064][  T307] R13: 00000000000005dc R14: ffffc900005b7010 R15: ffff8880110a2f08
[   23.752554][  T307] FS:  00007f45be763800(0000) GS:ffff8880776a7000(0000) knlGS:0000000000000000
[   23.753099][  T307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.753531][  T307] CR2: 00000000004e6888 CR3: 000000000505e002 CR4: 0000000000772ef0
[   23.753997][  T307] PKRU: 55555554
[   23.754260][  T307] Call Trace:
[   23.754496][  T307]  <TASK>
[ 23.754658][ T307] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.754969][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.755311][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.755636][ T307] netif_set_mtu (net/core/dev.c:9652) 
[ 23.755945][ T307] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.756293][ T307] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.756527][ T307] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 23.756953][ T307] br_add_if (net/bridge/br_if.c:697) bridge 
[ 23.757342][ T307] do_set_master (net/core/rtnetlink.c:2948) 
[ 23.757656][ T307] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 23.757979][ T307] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 23.758399][ T307] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 23.758706][ T307] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 23.759009][ T307] ? __kernel_text_address (kernel/extable.c:79) 
[ 23.759340][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.759652][ T307] ? __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) 
[ 23.759971][ T307] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 23.760372][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.760688][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.760993][ T307] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 23.761307][ T307] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 23.761635][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.761953][ T307] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.762266][ T307] ? __create_object (mm/kmemleak.c:771) 
[ 23.762594][ T307] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 23.762901][ T307] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 23.763220][ T307] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.763616][ T307] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 23.763944][ T307] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.764265][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.764581][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.764891][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.765216][ T307] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.765535][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.765844][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.766170][ T307] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.766489][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.766799][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.767129][ T307] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.767436][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.767766][ T307] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.768098][ T307] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.768416][ T307] ? 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) 
[ 23.768739][ T307] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.769050][ T307] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.769377][ T307] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.769699][ T307] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.770004][ T307] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.770325][ T307] ? _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) 
[ 23.770648][ T307] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.770954][ T307] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.771267][ T307] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.771671][ T307] ___sys_sendmsg (net/socket.c:2670) 
[ 23.771974][ T307] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 23.772290][ T307] ? __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) 
[ 23.772686][ T307] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.772995][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.773322][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.773659][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.773965][ T307] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 23.774280][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.774597][ T307] __sys_sendmsg (net/socket.c:2700) 
[ 23.774910][ T307] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 23.775297][ T307] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.775625][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.775940][ T307] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.776258][ T307] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.776650][  T307] RIP: 0033:0x7f45be9301e7
[ 23.776973][ T307] 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)
[   23.778089][  T307] RSP: 002b:00007fff70ef70a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.778577][  T307] RAX: ffffffffffffffda RBX: 00007fff70ef77d0 RCX: 00007f45be9301e7
[   23.779054][  T307] RDX: 0000000000000000 RSI: 00007fff70ef7110 RDI: 0000000000000005
[   23.779798][  T307] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   23.780266][  T307] R10: 0000000008af0910 R11: 0000000000000246 R12: 0000000000000003
[   23.780742][  T307] R13: 00000000686e4d95 R14: 0000000000499600 R15: 0000000000000000
| [   24.459479][  T312] ------------[ cut here ]------------
| [ 24.459820][ T312] WARNING: CPU: 2 PID: 312 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) 
| [   24.460464][  T312] Modules linked in: veth bridge stp llc
| [   24.461804][  T312] Tainted: [W]=WARN
[   24.462055][  T312] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.462460][ T312] 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) 
[ 24.462791][ T312] 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
[   24.463913][  T312] RSP: 0018:ffffc900005f6ef0 EFLAGS: 00010246
[   24.464325][  T312] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   24.464797][  T312] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   24.465285][  T312] RBP: ffffc900005f6fe0 R08: 0000000000000000 R09: 0000000000000000
[   24.465759][  T312] R10: ffffc900005f7010 R11: ffffffffb68b19b8 R12: 1ffff920000bede2
[   24.466237][  T312] R13: 00000000000005dc R14: ffffc900005f7010 R15: ffff8880110a2f08
[   24.466711][  T312] FS:  00007f551bb3f800(0000) GS:ffff8880777a7000(0000) knlGS:0000000000000000
[   24.467288][  T312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.467689][  T312] CR2: 00000000004e6888 CR3: 000000000f8d1004 CR4: 0000000000772ef0
[   24.468183][  T312] PKRU: 55555554
[   24.468426][  T312] Call Trace:
[   24.468673][  T312]  <TASK>
[ 24.468847][ T312] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 24.469179][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.469507][ T312] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 24.469828][ T312] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 24.470253][ T312] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 24.470578][ T312] netif_set_mtu (net/core/dev.c:9652) 
[ 24.470896][ T312] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 24.471236][ T312] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 24.471678][ T312] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 24.471928][ T312] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 24.472386][ T312] br_add_if (net/bridge/br_if.c:697) bridge 
[ 24.472755][ T312] do_set_master (net/core/rtnetlink.c:2948) 
[ 24.473077][ T312] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 24.473410][ T312] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 24.473810][ T312] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.474138][ T312] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 24.474457][ T312] ? __kernel_text_address (kernel/extable.c:79) 
[ 24.474796][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.475125][ T312] ? __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) 
[ 24.475446][ T312] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 24.475835][ T312] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.476164][ T312] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.476480][ T312] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 24.476814][ T312] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 24.477141][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.477460][ T312] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 24.477774][ T312] ? __create_object (mm/kmemleak.c:771) 
[ 24.478095][ T312] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 24.478429][ T312] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 24.478764][ T312] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 24.479167][ T312] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 24.479494][ T312] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 24.479817][ T312] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.480145][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.480470][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.480790][ T312] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 24.481127][ T312] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.481448][ T312] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.481769][ T312] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 24.482091][ T312] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.482421][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.482744][ T312] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 24.483123][ T312] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.483477][ T312] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 24.483809][ T312] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.484150][ T312] ? 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) 
[ 24.484505][ T312] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.484833][ T312] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.485170][ T312] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.485499][ T312] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.485817][ T312] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.486149][ T312] ? _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) 
[ 24.486473][ T312] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.486799][ T312] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.487125][ T312] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.487536][ T312] ___sys_sendmsg (net/socket.c:2670) 
[ 24.487852][ T312] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 24.488188][ T312] ? __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) 
[ 24.488585][ T312] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.488911][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.489243][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.489571][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.489890][ T312] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 24.490218][ T312] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.490544][ T312] __sys_sendmsg (net/socket.c:2700) 
[ 24.490861][ T312] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 24.491261][ T312] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.491601][ T312] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.491922][ T312] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.492255][ T312] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.492645][  T312] RIP: 0033:0x7f551bd0c1e7
[ 24.492975][ T312] 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)
[   24.494093][  T312] RSP: 002b:00007fff60b08058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.494574][  T312] RAX: ffffffffffffffda RBX: 00007fff60b08780 RCX: 00007f551bd0c1e7
[   24.495046][  T312] RDX: 0000000000000000 RSI: 00007fff60b080c0 RDI: 0000000000000005
[   24.495525][  T312] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   24.495998][  T312] R10: 0000000003b22910 R11: 0000000000000246 R12: 0000000000000003
[   24.496478][  T312] R13: 00000000686e4d96 R14: 0000000000499600 R15: 0000000000000000
| [   25.172628][  T317] ------------[ cut here ]------------
| [ 25.172938][ T317] WARNING: CPU: 3 PID: 317 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) 
| [   25.173558][  T317] Modules linked in: veth bridge stp llc
| [   25.174515][  T317] Tainted: [W]=WARN
[   25.174750][  T317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.175141][ T317] 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) 
[ 25.175460][ T317] 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
[   25.176792][  T317] RSP: 0018:ffffc900006a6ef0 EFLAGS: 00010246
[   25.177331][  T317] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   25.177794][  T317] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   25.178486][  T317] RBP: ffffc900006a6fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.178954][  T317] R10: ffffc900006a7010 R11: ffffffffb68b19b8 R12: 1ffff920000d4de2
[   25.179563][  T317] R13: 00000000000005dc R14: ffffc900006a7010 R15: ffff8880110a2f08
[   25.180024][  T317] FS:  00007fd78be71800(0000) GS:ffff888077827000(0000) knlGS:0000000000000000
[   25.180585][  T317] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.180982][  T317] CR2: 00000000004e6888 CR3: 000000000f96f001 CR4: 0000000000772ef0
[   25.181470][  T317] PKRU: 55555554
[   25.181708][  T317] Call Trace:
[   25.181939][  T317]  <TASK>
[ 25.182101][ T317] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.182423][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.182735][ T317] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 25.183045][ T317] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 25.183437][ T317] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 25.183755][ T317] netif_set_mtu (net/core/dev.c:9652) 
[ 25.184063][ T317] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.184401][ T317] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 25.184833][ T317] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.185069][ T317] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.185504][ T317] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.185869][ T317] do_set_master (net/core/rtnetlink.c:2948) 
[ 25.186190][ T317] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.186503][ T317] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.186890][ T317] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.187207][ T317] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.187513][ T317] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.187825][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.188162][ T317] ? __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) 
[ 25.188479][ T317] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.188878][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.189200][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.189508][ T317] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 25.189815][ T317] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 25.190137][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.190448][ T317] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 25.190751][ T317] ? __create_object (mm/kmemleak.c:771) 
[ 25.191061][ T317] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 25.191379][ T317] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 25.191690][ T317] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 25.192074][ T317] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 25.192406][ T317] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 25.192728][ T317] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.193037][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.193362][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.193677][ T317] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 25.193984][ T317] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.194299][ T317] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.194606][ T317] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 25.194914][ T317] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.195236][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.195558][ T317] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 25.195864][ T317] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.196191][ T317] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 25.196514][ T317] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 25.196819][ T317] ? 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) 
[ 25.197141][ T317] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 25.197450][ T317] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 25.197765][ T317] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 25.198073][ T317] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 25.198398][ T317] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 25.198707][ T317] ? _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) 
[ 25.199017][ T317] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 25.199338][ T317] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 25.199643][ T317] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 25.200035][ T317] ___sys_sendmsg (net/socket.c:2670) 
[ 25.200356][ T317] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 25.200668][ T317] ? __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) 
[ 25.201048][ T317] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 25.201370][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.201681][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.201990][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.202307][ T317] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 25.202611][ T317] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.202925][ T317] __sys_sendmsg (net/socket.c:2700) 
[ 25.203238][ T317] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 25.203627][ T317] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 25.203945][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.204271][ T317] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.204586][ T317] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.204963][  T317] RIP: 0033:0x7fd78c03e1e7
[ 25.205288][ T317] 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)
[   25.206392][  T317] RSP: 002b:00007ffd8bd9aa28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.206855][  T317] RAX: ffffffffffffffda RBX: 00007ffd8bd9b150 RCX: 00007fd78c03e1e7
[   25.207323][  T317] RDX: 0000000000000000 RSI: 00007ffd8bd9aa90 RDI: 0000000000000005
[   25.207790][  T317] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   25.208276][  T317] R10: 000000000fb8d910 R11: 0000000000000246 R12: 0000000000000003
[   25.208776][  T317] R13: 00000000686e4d96 R14: 0000000000499600 R15: 0000000000000000
| [   25.887673][  T322] ------------[ cut here ]------------
| [ 25.888005][ T322] WARNING: CPU: 2 PID: 322 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) 
| [   25.888658][  T322] Modules linked in: veth bridge stp llc
| [   25.890341][  T322] Tainted: [W]=WARN
[   25.890590][  T322] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.890986][ T322] 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) 
[ 25.891330][ T322] 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
[   25.892462][  T322] RSP: 0018:ffffc90000726ef0 EFLAGS: 00010246
[   25.892874][  T322] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   25.893354][  T322] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   25.893831][  T322] RBP: ffffc90000726fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.894310][  T322] R10: ffffc90000727010 R11: ffffffffb68b19b8 R12: 1ffff920000e4de2
[   25.894778][  T322] R13: 00000000000005dc R14: ffffc90000727010 R15: ffff8880110a2f08
[   25.895258][  T322] FS:  00007f783bdc1800(0000) GS:ffff8880777a7000(0000) knlGS:0000000000000000
[   25.895829][  T322] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.896248][  T322] CR2: 00000000004e5770 CR3: 000000000f9b4004 CR4: 0000000000772ef0
[   25.896724][  T322] PKRU: 55555554
[   25.896968][  T322] Call Trace:
[   25.897219][  T322]  <TASK>
[ 25.897390][ T322] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.897723][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.898049][ T322] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 25.898408][ T322] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 25.898804][ T322] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 25.899135][ T322] netif_set_mtu (net/core/dev.c:9652) 
[ 25.899458][ T322] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.899788][ T322] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 25.900267][ T322] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.900530][ T322] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.900973][ T322] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.901348][ T322] do_set_master (net/core/rtnetlink.c:2948) 
[ 25.901673][ T322] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.901995][ T322] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.902421][ T322] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.902738][ T322] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.903061][ T322] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.903395][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.903717][ T322] ? __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) 
[ 25.904034][ T322] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.904464][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.904788][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.905104][ T322] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 25.905439][ T322] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 25.905760][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.906076][ T322] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 25.906415][ T322] ? __create_object (mm/kmemleak.c:771) 
[ 25.906731][ T322] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 25.907051][ T322] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 25.907376][ T322] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 25.907766][ T322] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 25.908093][ T322] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 25.908446][ T322] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.908779][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.909101][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.909433][ T322] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 25.909746][ T322] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.910065][ T322] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.910391][ T322] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 25.910718][ T322] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.911038][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.911372][ T322] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 25.911691][ T322] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.912010][ T322] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 25.912360][ T322] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 25.912677][ T322] ? 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) 
[ 25.913251][ T322] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 25.913575][ T322] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 25.913900][ T322] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 25.914232][ T322] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 25.914553][ T322] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 25.914871][ T322] ? _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) 
[ 25.915207][ T322] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 25.915529][ T322] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 25.915849][ T322] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 25.916272][ T322] ___sys_sendmsg (net/socket.c:2670) 
[ 25.916590][ T322] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 25.916906][ T322] ? __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) 
[ 25.917312][ T322] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 25.917633][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.917957][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.918306][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.918627][ T322] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 25.918942][ T322] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.919278][ T322] __sys_sendmsg (net/socket.c:2700) 
[ 25.919598][ T322] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 25.919988][ T322] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 25.920343][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.920665][ T322] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.920984][ T322] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.921384][  T322] RIP: 0033:0x7f783bf8e1e7
[ 25.921712][ T322] 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)
[   25.922827][  T322] RSP: 002b:00007ffed87af708 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.923308][  T322] RAX: ffffffffffffffda RBX: 00007ffed87afe30 RCX: 00007f783bf8e1e7
[   25.923782][  T322] RDX: 0000000000000000 RSI: 00007ffed87af770 RDI: 0000000000000005
[   25.924270][  T322] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   25.924750][  T322] R10: 000000002a739910 R11: 0000000000000246 R12: 0000000000000003
[   25.925229][  T322] R13: 00000000686e4d97 R14: 0000000000499600 R15: 0000000000000000
| [   40.711529][   T70] ------------[ cut here ]------------
| [ 40.711844][ T70] WARNING: CPU: 1 PID: 70 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) 
| [   40.712702][   T70] 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
| [   40.714806][   T70] Tainted: [W]=WARN
[   40.715040][   T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   40.715572][   T70] Workqueue: netns cleanup_net
[ 40.715916][ T70] 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) 
[ 40.716380][ T70] 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
[   40.717924][   T70] RSP: 0000:ffffc900004b75b0 EFLAGS: 00010246
[   40.718496][   T70] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   40.718957][   T70] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   40.719593][   T70] RBP: ffffc900004b76a0 R08: 0000000000000000 R09: 0000000000000000
[   40.720056][   T70] R10: ffffc900004b76d0 R11: ffffffffb20b586a R12: 1ffff92000096eba
[   40.720691][   T70] R13: 00000000000005dc R14: ffffc900004b76d0 R15: ffff8880110a2f08
[   40.721210][   T70] FS:  0000000000000000(0000) GS:ffff888077727000(0000) knlGS:0000000000000000
[   40.721794][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.722265][   T70] CR2: 00007f13a7dabf88 CR3: 000000000505f003 CR4: 0000000000772ef0
[   40.722767][   T70] PKRU: 55555554
[   40.723015][   T70] Call Trace:
[   40.723278][   T70]  <TASK>
[ 40.723447][ T70] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 40.723771][ T70] ? __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) 
[ 40.724161][ T70] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 40.724513][ T70] ? br_device_event (net/bridge/br.c:141) bridge 
[ 40.724854][ T70] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 40.725172][ T70] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 40.725524][ T70] ? cleanup_net (net/core/net_namespace.c:684) 
[ 40.725837][ T70] ? process_one_work (kernel/workqueue.c:3238) 
[ 40.726172][ T70] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 40.726478][ T70] ? kthread (kernel/kthread.c:464) 
[ 40.726712][ T70] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 40.727017][ T70] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 40.727330][ T70] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 40.727651][ T70] netif_set_mtu (net/core/dev.c:9652) 
[ 40.727958][ T70] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 40.728305][ T70] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 40.728546][ T70] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 40.728969][ T70] br_del_if (net/bridge/br_if.c:743) bridge 
[ 40.729343][ T70] br_device_event (net/bridge/br.c:141) bridge 
[ 40.729704][ T70] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 40.730128][ T70] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 40.730448][ T70] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 40.730848][ T70] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 40.731258][ T70] ? 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) 
[ 40.731582][ T70] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 40.731986][ T70] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 40.732376][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 40.732800][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 40.733204][ T70] default_device_exit_batch (net/core/dev.c:12673) 
[ 40.733570][ T70] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 40.733969][ T70] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 40.734295][ T70] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 40.734616][ T70] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 40.734938][ T70] cleanup_net (net/core/net_namespace.c:684) 
[ 40.735257][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 40.735573][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 40.735898][ T70] process_one_work (kernel/workqueue.c:3238) 
[ 40.736230][ T70] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 40.736554][ T70] ? assign_work (kernel/workqueue.c:1200) 
[ 40.736864][ T70] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 40.737199][ T70] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 40.737510][ T70] kthread (kernel/kthread.c:464) 
[ 40.737743][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.738120][ T70] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 40.738446][ T70] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 40.738776][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 40.739088][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.739407][ T70] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 40.739712][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 40.740020][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   41.075880][   T70] ------------[ cut here ]------------
| [ 41.077076][ T70] WARNING: CPU: 1 PID: 70 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) 
| [   41.077628][   T70] 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
| [   41.079406][   T70] Tainted: [W]=WARN
[   41.079672][   T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   41.080065][   T70] Workqueue: netns cleanup_net
[ 41.080393][ T70] 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) 
[ 41.080708][ T70] 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
[   41.081813][   T70] RSP: 0018:ffffc900004b75b0 EFLAGS: 00010246
[   41.082211][   T70] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   41.082676][   T70] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   41.083145][   T70] RBP: ffffc900004b76a0 R08: 0000000000000000 R09: 0000000000000000
[   41.083610][   T70] R10: ffffc900004b76d0 R11: ffffffffb5f798a0 R12: 1ffff92000096eba
[   41.084076][   T70] R13: 00000000000005dc R14: ffffc900004b76d0 R15: ffff8880110a2f08
[   41.084543][   T70] FS:  0000000000000000(0000) GS:ffff888077727000(0000) knlGS:0000000000000000
[   41.085119][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.085530][   T70] CR2: 0000562d01add980 CR3: 000000000b5bb006 CR4: 0000000000772ef0
[   41.086026][   T70] PKRU: 55555554
[   41.086267][   T70] Call Trace:
[   41.086497][   T70]  <TASK>
[ 41.086651][ T70] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 41.086962][ T70] ? __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) 
[ 41.087470][ T70] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 41.087830][ T70] ? br_device_event (net/bridge/br.c:141) bridge 
[ 41.088260][ T70] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 41.088665][ T70] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.088972][ T70] ? cleanup_net (net/core/net_namespace.c:684) 
[ 41.089340][ T70] ? process_one_work (kernel/workqueue.c:3238) 
[ 41.089660][ T70] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.090001][ T70] ? kthread (kernel/kthread.c:464) 
[ 41.090242][ T70] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.090549][ T70] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 41.090857][ T70] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 41.091246][ T70] netif_set_mtu (net/core/dev.c:9652) 
[ 41.091556][ T70] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 41.091943][ T70] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 41.092214][ T70] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 41.092711][ T70] br_del_if (net/bridge/br_if.c:743) bridge 
[ 41.093056][ T70] br_device_event (net/bridge/br.c:141) bridge 
[ 41.093411][ T70] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 41.093845][ T70] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 41.094170][ T70] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 41.094501][ T70] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 41.094937][ T70] ? 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) 
[ 41.095280][ T70] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 41.095666][ T70] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 41.096052][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.096440][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.096833][ T70] default_device_exit_batch (net/core/dev.c:12673) 
[ 41.097146][ T70] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 41.097545][ T70] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.097858][ T70] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 41.098176][ T70] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 41.098505][ T70] cleanup_net (net/core/net_namespace.c:684) 
[ 41.098812][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 41.099129][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.099480][ T70] process_one_work (kernel/workqueue.c:3238) 
[ 41.099801][ T70] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 41.100135][ T70] ? assign_work (kernel/workqueue.c:1200) 
[ 41.100453][ T70] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.100773][ T70] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 41.101081][ T70] kthread (kernel/kthread.c:464) 
[ 41.101324][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.101628][ T70] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 41.101933][ T70] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 41.102253][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.102564][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.102881][ T70] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.103203][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.103579][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   41.697444][   T70] ------------[ cut here ]------------
| [ 41.697767][ T70] WARNING: CPU: 1 PID: 70 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) 
| [   41.698698][   T70] 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
| [   41.700375][   T70] Tainted: [W]=WARN
[   41.700615][   T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   41.700999][   T70] Workqueue: netns cleanup_net
[ 41.701340][ T70] 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) 
[ 41.701660][ T70] 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
[   41.702826][   T70] RSP: 0018:ffffc900004b75b0 EFLAGS: 00010246
[   41.703223][   T70] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   41.703682][   T70] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   41.704149][   T70] RBP: ffffc900004b76a0 R08: 0000000000000000 R09: 0000000000000000
[   41.704606][   T70] R10: ffffc900004b76d0 R11: ffffffffb5f798a0 R12: 1ffff92000096eba
[   41.705070][   T70] R13: 00000000000005dc R14: ffffc900004b76d0 R15: ffff8880110a2f08
[   41.705546][   T70] FS:  0000000000000000(0000) GS:ffff888077727000(0000) knlGS:0000000000000000
[   41.706087][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.706481][   T70] CR2: 00007ffa6af4ffe4 CR3: 0000000037f36006 CR4: 0000000000772ef0
[   41.706950][   T70] PKRU: 55555554
[   41.707188][   T70] Call Trace:
[   41.707417][   T70]  <TASK>
[ 41.707571][ T70] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 41.707880][ T70] ? __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) 
[ 41.708278][ T70] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 41.708633][ T70] ? br_device_event (net/bridge/br.c:141) bridge 
[ 41.708975][ T70] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 41.709302][ T70] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.709607][ T70] ? cleanup_net (net/core/net_namespace.c:684) 
[ 41.709910][ T70] ? process_one_work (kernel/workqueue.c:3238) 
[ 41.710224][ T70] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.710526][ T70] ? kthread (kernel/kthread.c:464) 
[ 41.710756][ T70] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.711059][ T70] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 41.711380][ T70] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 41.711695][ T70] netif_set_mtu (net/core/dev.c:9652) 
[ 41.712001][ T70] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 41.712334][ T70] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 41.712566][ T70] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 41.712988][ T70] br_del_if (net/bridge/br_if.c:743) bridge 
[ 41.713349][ T70] br_device_event (net/bridge/br.c:141) bridge 
[ 41.713692][ T70] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 41.714122][ T70] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 41.714436][ T70] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 41.714747][ T70] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 41.715139][ T70] ? 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) 
[ 41.715445][ T70] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 41.715824][ T70] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 41.716214][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.716600][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 41.716988][ T70] default_device_exit_batch (net/core/dev.c:12673) 
[ 41.717312][ T70] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 41.717707][ T70] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 41.718016][ T70] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 41.718335][ T70] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 41.718655][ T70] cleanup_net (net/core/net_namespace.c:684) 
[ 41.718963][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 41.719279][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.719590][ T70] process_one_work (kernel/workqueue.c:3238) 
[ 41.719906][ T70] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 41.720229][ T70] ? assign_work (kernel/workqueue.c:1200) 
[ 41.720541][ T70] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 41.720856][ T70] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 41.721184][ T70] kthread (kernel/kthread.c:464) 
[ 41.721427][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.721730][ T70] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 41.722034][ T70] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 41.722348][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 41.722652][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.722958][ T70] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 41.723269][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 41.723581][ T70] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   42.291376][   T70] ------------[ cut here ]------------
| [ 42.291692][ T70] WARNING: CPU: 1 PID: 70 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) 
| [   42.292236][   T70] 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
| [   42.294051][   T70] Tainted: [W]=WARN
[   42.294290][   T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.294680][   T70] Workqueue: netns cleanup_net
[ 42.295001][ T70] 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) 
[ 42.295325][ T70] 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
[   42.296441][   T70] RSP: 0018:ffffc900004b75b0 EFLAGS: 00010246
[   42.296842][   T70] RAX: 0000000000000000 RBX: ffff8880110a2000 RCX: 0000000000000001
[   42.297310][   T70] RDX: 0000000000000000 RSI: ffffffffb5a9f52e RDI: ffffffffb525a5a0
[   42.297775][   T70] RBP: ffffc900004b76a0 R08: 0000000000000000 R09: 0000000000000000
[   42.298248][   T70] R10: ffffc900004b76d0 R11: ffffffffb5f798a0 R12: 1ffff92000096eba
[   42.298718][   T70] R13: 00000000000005dc R14: ffffc900004b76d0 R15: ffff8880110a2f08
[   42.299345][   T70] FS:  0000000000000000(0000) GS:ffff888077727000(0000) knlGS:0000000000000000
[   42.299891][   T70] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.300472][   T70] CR2: 0000000000406141 CR3: 000000001104e005 CR4: 0000000000772ef0
[   42.300943][   T70] PKRU: 55555554
[   42.301410][   T70] Call Trace:
[   42.301643][   T70]  <TASK>
[ 42.301799][ T70] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 42.302104][ T70] ? __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) 
[ 42.302503][ T70] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 42.302861][ T70] ? br_device_event (net/bridge/br.c:141) bridge 
[ 42.303215][ T70] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 42.303523][ T70] ? ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 42.303831][ T70] ? cleanup_net (net/core/net_namespace.c:684) 
[ 42.304141][ T70] ? process_one_work (kernel/workqueue.c:3238) 
[ 42.304448][ T70] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.304755][ T70] ? kthread (kernel/kthread.c:464) 
[ 42.304984][ T70] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.305295][ T70] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 42.305606][ T70] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.305925][ T70] netif_set_mtu (net/core/dev.c:9652) 
[ 42.306242][ T70] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 42.306571][ T70] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 42.306810][ T70] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 42.307249][ T70] br_del_if (net/bridge/br_if.c:743) bridge 
[ 42.307602][ T70] br_device_event (net/bridge/br.c:141) bridge 
[ 42.307944][ T70] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 42.308388][ T70] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 42.308703][ T70] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 42.309018][ T70] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 42.309412][ T70] ? 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) 
[ 42.309718][ T70] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 42.310102][ T70] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 42.310493][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.310876][ T70] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.311276][ T70] default_device_exit_batch (net/core/dev.c:12673) 
[ 42.311580][ T70] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 42.311973][ T70] ops_undo_list (net/core/net_namespace.c:204 net/core/net_namespace.c:251) 
[ 42.312299][ T70] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 42.312603][ T70] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 42.312920][ T70] cleanup_net (net/core/net_namespace.c:684) 
[ 42.313234][ T70] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 42.313543][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.313853][ T70] process_one_work (kernel/workqueue.c:3238) 
[ 42.314179][ T70] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 42.314493][ T70] ? assign_work (kernel/workqueue.c:1200) 
[ 42.314806][ T70] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.315135][ T70] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 42.315444][ T70] kthread (kernel/kthread.c:464) 
[ 42.315676][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.315980][ T70] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 42.316296][ T70] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 42.316602][ T70] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.316910][ T70] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.317230][ T70] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.317534][ T70] ? __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