======================================
| # [   25.111490] c1: entered promiscuous mode
| # [   25.114531] ------------[ cut here ]------------
| # [   25.114886] WARNING: CPU: 2 PID: 308 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| # [   25.115539] Modules linked in: veth bridge stp llc
# [   25.117302] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.117722] 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) 
# [ 25.118073] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
# [   25.119205] RSP: 0018:ffffc90000c26ef0 EFLAGS: 00010246
# [   25.119625] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
# [   25.120126] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
# [   25.120608] RBP: ffffc90000c26fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.121217] R10: ffffc90000c27010 R11: ffffffff93f798a0 R12: 1ffff92000184de2
# [   25.121701] R13: 00000000000005dc R14: ffffc90000c27010 R15: ffff88800dd9af08
# [   25.122193] FS:  00007f824b731800(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
# [   25.122742] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.123178] CR2: 00000000004e6888 CR3: 000000000c2ff001 CR4: 0000000000772ef0
# [   25.123675] PKRU: 55555554
# [   25.123931] Call Trace:
# [   25.124181]  <TASK>
# [   25.124357] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.124695] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.125043] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.125371] netif_set_mtu (net/core/dev.c:9652) 
# [   25.125691] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.126043] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.126291] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.126731] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.127117] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
# [   25.127446] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.127770] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.128182] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.128512] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.128829] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.129167] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.129492] ? __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) 
# [   25.129809] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.130210] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.130541] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.130870] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   25.131207] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   25.131543] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.131862] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   25.132188] ? __create_object (mm/kmemleak.c:771) 
# [   25.132512] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   25.132842] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   25.133171] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   25.133571] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   25.133895] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   25.134230] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.134547] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.134875] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.135214] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   25.135538] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.135855] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.136187] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   25.136505] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.136827] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.137160] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   25.137482] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.137802] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   25.138143] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   25.138465] ? 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) 
# [   25.138786] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
# [   25.139122] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   25.139456] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   25.139776] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   25.140108] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   25.140429] ? _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) 
# [   25.140760] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   25.141093] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   25.141416] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   25.141822] ___sys_sendmsg (net/socket.c:2670) 
# [   25.142406] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   25.142731] ? __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) 
# [   25.143159] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   25.143489] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.144047] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.144372] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.144691] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   25.145240] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.145569] __sys_sendmsg (net/socket.c:2700) 
# [   25.145884] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   25.146288] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   25.146845] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.147186] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   25.147521] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   25.147912] RIP: 0033:0x7f824b8fe1e7
# [ 25.148489] 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)
# [   25.149961] RSP: 002b:00007fff163f2058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   25.150444] RAX: ffffffffffffffda RBX: 00007fff163f2780 RCX: 00007f824b8fe1e7
# [   25.150939] RDX: 0000000000000000 RSI: 00007fff163f20c0 RDI: 0000000000000005
# [   25.151653] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   25.152146] R10: 00000000195c6910 R11: 0000000000000246 R12: 0000000000000003
# [   25.152617] R13: 00000000686e7730 R14: 0000000000499600 R15: 0000000000000000
| # [   25.889139] ------------[ cut here ]------------
| # [   25.889485] WARNING: CPU: 2 PID: 313 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| # [   25.890631] Modules linked in: veth bridge stp llc
| # [   25.891640] Tainted: [W]=WARN
# [   25.891887] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   25.892298] 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) 
# [ 25.892627] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
# [   25.893771] RSP: 0018:ffffc90000b46ef0 EFLAGS: 00010246
# [   25.894197] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
# [   25.894670] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
# [   25.895147] RBP: ffffc90000b46fe0 R08: 0000000000000000 R09: 0000000000000000
# [   25.895615] R10: ffffc90000b47010 R11: ffffffff948b19b8 R12: 1ffff92000168de2
# [   25.896093] R13: 00000000000005dc R14: ffffc90000b47010 R15: ffff88800dd9af08
# [   25.896565] FS:  00007fc4e8277800(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
# [   25.897121] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   25.897515] CR2: 00000000004e6888 CR3: 0000000009b3b006 CR4: 0000000000772ef0
# [   25.898000] PKRU: 55555554
# [   25.898242] Call Trace:
# [   25.898483]  <TASK>
# [   25.898658] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   25.898997] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.899321] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   25.899640] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   25.900041] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   25.900364] netif_set_mtu (net/core/dev.c:9652) 
# [   25.900681] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   25.901024] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   25.901464] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   25.901709] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   25.902149] br_add_if (net/bridge/br_if.c:697) bridge 
# [   25.902521] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
# [   25.902849] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   25.903182] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   25.903585] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   25.903904] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   25.904226] ? __kernel_text_address (kernel/extable.c:79) 
# [   25.904555] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.904874] ? __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) 
# [   25.905201] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   25.905593] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.905924] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.906241] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   25.906563] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   25.906879] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.907206] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   25.907524] ? __create_object (mm/kmemleak.c:771) 
# [   25.907844] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   25.908174] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   25.908493] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   25.908894] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   25.909227] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   25.909549] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.909869] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.910198] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.910526] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   25.910847] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.911177] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   25.911497] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   25.911814] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.912145] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.912469] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   25.912799] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   25.913133] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   25.913463] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   25.913779] ? 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) 
# [   25.914111] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
# [   25.914435] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   25.914760] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   25.915093] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   25.915418] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   25.915737] ? _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) 
# [   25.916068] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   25.916386] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   25.916705] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   25.917124] ___sys_sendmsg (net/socket.c:2670) 
# [   25.917440] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   25.917782] ? __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) 
# [   25.918185] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   25.918506] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.918827] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   25.919167] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   25.919486] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   25.919802] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   25.920136] __sys_sendmsg (net/socket.c:2700) 
# [   25.920458] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   25.920846] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   25.921184] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   25.921506] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   25.921824] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   25.922224] RIP: 0033:0x7fc4e84441e7
# [ 25.922551] 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)
# [   25.923671] RSP: 002b:00007ffd8666f078 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   25.924151] RAX: ffffffffffffffda RBX: 00007ffd8666f7a0 RCX: 00007fc4e84441e7
# [   25.924620] RDX: 0000000000000000 RSI: 00007ffd8666f0e0 RDI: 0000000000000005
# [   25.925100] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   25.925571] R10: 000000001fd4d910 R11: 0000000000000246 R12: 0000000000000003
# [   25.926045] R13: 00000000686e7731 R14: 0000000000499600 R15: 0000000000000000
| # [   26.652265] ------------[ cut here ]------------
| # [   26.652580] WARNING: CPU: 1 PID: 318 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| # [   26.653221] Modules linked in: veth bridge stp llc
| # [   26.654177] Tainted: [W]=WARN
# [   26.654416] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   26.654815] 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) 
# [ 26.655142] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
# [   26.656250] RSP: 0018:ffffc900006d6ef0 EFLAGS: 00010246
# [   26.656641] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
# [   26.657107] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
# [   26.657571] RBP: ffffc900006d6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   26.658182] R10: ffffc900006d7010 R11: ffffffff93f798a0 R12: 1ffff920000dade2
# [   26.658646] R13: 00000000000005dc R14: ffffc900006d7010 R15: ffff88800dd9af08
# [   26.659159] FS:  00007f38a0ee3800(0000) GS:ffff8880a0727000(0000) knlGS:0000000000000000
# [   26.659698] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   26.660098] CR2: 00000000004e6888 CR3: 0000000005399001 CR4: 0000000000772ef0
# [   26.660565] PKRU: 55555554
# [   26.660797] Call Trace:
# [   26.661036]  <TASK>
# [   26.661197] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   26.661512] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.661831] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.662154] netif_set_mtu (net/core/dev.c:9652) 
# [   26.662467] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   26.662805] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   26.663060] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   26.663491] br_add_if (net/bridge/br_if.c:697) bridge 
# [   26.663843] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
# [   26.664164] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   26.664478] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   26.664866] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   26.665188] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   26.665495] ? __kernel_text_address (kernel/extable.c:79) 
# [   26.665809] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.666129] ? __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) 
# [   26.666440] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   26.666820] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   26.667140] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   26.667454] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   26.667761] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   26.668078] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.668385] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   26.668688] ? __create_object (mm/kmemleak.c:771) 
# [   26.669004] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   26.669311] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   26.669622] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   26.670011] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   26.670332] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   26.670644] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   26.670956] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.671266] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.671571] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   26.671874] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   26.672194] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   26.672498] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   26.672806] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   26.673126] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.673439] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   26.673754] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   26.674071] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   26.674394] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   26.674697] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
# [   26.675014] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
# [   26.675321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   26.675633] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   26.675952] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   26.676260] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   26.676573] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
# [   26.676884] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   26.677200] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   26.677510] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   26.677906] ___sys_sendmsg (net/socket.c:2670) 
# [   26.678220] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   26.678526] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
# [   26.678912] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   26.679234] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.679543] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   26.679856] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   26.680171] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   26.680478] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   26.680792] __sys_sendmsg (net/socket.c:2700) 
# [   26.681100] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   26.681486] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   26.681805] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   26.682128] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   26.682447] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   26.682836] RIP: 0033:0x7f38a10b01e7
# [ 26.683162] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
# [   26.684270] RSP: 002b:00007ffdc9fc0ef8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   26.684735] RAX: ffffffffffffffda RBX: 00007ffdc9fc1620 RCX: 00007f38a10b01e7
# [   26.685201] RDX: 0000000000000000 RSI: 00007ffdc9fc0f60 RDI: 0000000000000005
# [   26.685667] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   26.686137] R10: 0000000033259910 R11: 0000000000000246 R12: 0000000000000003
# [   26.686607] R13: 00000000686e7732 R14: 0000000000499600 R15: 0000000000000000
| # [   27.433538] ------------[ cut here ]------------
| # [   27.433854] WARNING: CPU: 1 PID: 323 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| # [   27.434480] Modules linked in: veth bridge stp llc
| # [   27.435437] Tainted: [W]=WARN
# [   27.435670] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# [   27.436065] 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) 
# [ 27.436385] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
# [   27.437485] RSP: 0018:ffffc900005e6ef0 EFLAGS: 00010246
# [   27.437872] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
# [   27.438342] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
# [   27.438797] RBP: ffffc900005e6fe0 R08: 0000000000000000 R09: 0000000000000000
# [   27.439401] R10: ffffc900005e7010 R11: ffffffff948b19b8 R12: 1ffff920000bcde2
# [   27.439858] R13: 00000000000005dc R14: ffffc900005e7010 R15: ffff88800dd9af08
# [   27.440328] FS:  00007fe765954800(0000) GS:ffff8880a0727000(0000) knlGS:0000000000000000
# [   27.440861] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# [   27.441252] CR2: 00000000004e5770 CR3: 000000000b197003 CR4: 0000000000772ef0
# [   27.441711] PKRU: 55555554
# [   27.441947] Call Trace:
# [   27.442178]  <TASK>
# [   27.442337] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
# [   27.442646] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   27.442979] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
# [   27.443285] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# [   27.443666] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
# [   27.443985] netif_set_mtu (net/core/dev.c:9652) 
# [   27.444299] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
# [   27.444615] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
# [   27.445051] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
# [   27.445284] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
# [   27.445700] br_add_if (net/bridge/br_if.c:697) bridge 
# [   27.446061] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
# [   27.446374] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
# [   27.446682] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
# [   27.447080] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
# [   27.447389] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
# [   27.447690] ? __kernel_text_address (kernel/extable.c:79) 
# [   27.448015] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   27.448324] ? __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) 
# [   27.448632] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
# [   27.449019] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   27.449332] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   27.449633] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
# [   27.449946] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
# [   27.450254] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   27.450562] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
# [   27.450862] ? __create_object (mm/kmemleak.c:771) 
# [   27.451174] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
# [   27.451480] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
# [   27.451789] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# [   27.452174] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
# [   27.452497] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
# [   27.452808] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   27.453121] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   27.453431] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   27.453734] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
# [   27.454042] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   27.454354] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
# [   27.454663] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
# [   27.454977] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   27.455292] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   27.455601] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
# [   27.455907] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
# [   27.456219] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
# [   27.456544] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
# [   27.456846] ? 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) 
# [   27.457159] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
# [   27.457469] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
# [   27.457781] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
# [   27.458096] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
# [   27.458402] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
# [   27.458717] ? _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) 
# [   27.459033] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
# [   27.459339] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
# [   27.459646] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
# [   27.460044] ___sys_sendmsg (net/socket.c:2670) 
# [   27.460346] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
# [   27.460654] ? __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) 
# [   27.461057] ? __pfx____sys_sendmsg (net/socket.c:2657) 
# [   27.461366] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   27.461674] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
# [   27.461996] ? find_held_lock (kernel/locking/lockdep.c:5353) 
# [   27.462301] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
# [   27.462609] ? __lock_release (kernel/locking/lockdep.c:5539) 
# [   27.462946] __sys_sendmsg (net/socket.c:2700) 
# [   27.463249] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
# [   27.463631] ? __pfx___sys_sendmsg (net/socket.c:2685) 
# [   27.463959] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
# [   27.464264] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# [   27.464574] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# [   27.464958] RIP: 0033:0x7fe765b211e7
# [ 27.465272] 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)
# [   27.466374] RSP: 002b:00007fffca4af288 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
# [   27.466839] RAX: ffffffffffffffda RBX: 00007fffca4af9b0 RCX: 00007fe765b211e7
# [   27.467302] RDX: 0000000000000000 RSI: 00007fffca4af2f0 RDI: 0000000000000005
# [   27.467763] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
# [   27.468228] R10: 000000000a230910 R11: 0000000000000246 R12: 0000000000000003
# [   27.468686] R13: 00000000686e7733 R14: 0000000000499600 R15: 0000000000000000
| [   25.111490][  T308] c1: entered promiscuous mode
| [   25.114531][  T308] ------------[ cut here ]------------
| [ 25.114886][ T308] WARNING: CPU: 2 PID: 308 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   25.115539][  T308] Modules linked in: veth bridge stp llc
[   25.117302][  T308] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.117722][ T308] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 25.118073][ T308] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   25.119205][  T308] RSP: 0018:ffffc90000c26ef0 EFLAGS: 00010246
[   25.119625][  T308] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   25.120126][  T308] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   25.120608][  T308] RBP: ffffc90000c26fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.121217][  T308] R10: ffffc90000c27010 R11: ffffffff93f798a0 R12: 1ffff92000184de2
[   25.121701][  T308] R13: 00000000000005dc R14: ffffc90000c27010 R15: ffff88800dd9af08
[   25.122193][  T308] FS:  00007f824b731800(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
[   25.122742][  T308] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.123178][  T308] CR2: 00000000004e6888 CR3: 000000000c2ff001 CR4: 0000000000772ef0
[   25.123675][  T308] PKRU: 55555554
[   25.123931][  T308] Call Trace:
[   25.124181][  T308]  <TASK>
[ 25.124357][ T308] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.124695][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.125043][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.125371][ T308] netif_set_mtu (net/core/dev.c:9652) 
[ 25.125691][ T308] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.126043][ T308] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.126291][ T308] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.126731][ T308] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.127117][ T308] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 25.127446][ T308] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.127770][ T308] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.128182][ T308] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.128512][ T308] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.128829][ T308] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.129167][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.129492][ T308] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 25.129809][ T308] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.130210][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.130541][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.130870][ T308] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 25.131207][ T308] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 25.131543][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.131862][ T308] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 25.132188][ T308] ? __create_object (mm/kmemleak.c:771) 
[ 25.132512][ T308] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 25.132842][ T308] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 25.133171][ T308] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 25.133571][ T308] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 25.133895][ T308] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 25.134230][ T308] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.134547][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.134875][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.135214][ T308] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 25.135538][ T308] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.135855][ T308] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.136187][ T308] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 25.136505][ T308] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.136827][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.137160][ T308] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 25.137482][ T308] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.137802][ T308] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 25.138143][ T308] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 25.138465][ T308] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 25.138786][ T308] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 25.139122][ T308] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 25.139456][ T308] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 25.139776][ T308] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 25.140108][ T308] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 25.140429][ T308] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 25.140760][ T308] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 25.141093][ T308] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 25.141416][ T308] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 25.141822][ T308] ___sys_sendmsg (net/socket.c:2670) 
[ 25.142406][ T308] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 25.142731][ T308] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 25.143159][ T308] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 25.143489][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.144047][ T308] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.144372][ T308] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.144691][ T308] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 25.145240][ T308] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.145569][ T308] __sys_sendmsg (net/socket.c:2700) 
[ 25.145884][ T308] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 25.146288][ T308] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 25.146845][ T308] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.147186][ T308] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.147521][ T308] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.147912][  T308] RIP: 0033:0x7f824b8fe1e7
[ 25.148489][ T308] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   25.149961][  T308] RSP: 002b:00007fff163f2058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.150444][  T308] RAX: ffffffffffffffda RBX: 00007fff163f2780 RCX: 00007f824b8fe1e7
[   25.150939][  T308] RDX: 0000000000000000 RSI: 00007fff163f20c0 RDI: 0000000000000005
[   25.151653][  T308] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   25.152146][  T308] R10: 00000000195c6910 R11: 0000000000000246 R12: 0000000000000003
[   25.152617][  T308] R13: 00000000686e7730 R14: 0000000000499600 R15: 0000000000000000
| [   25.889139][  T313] ------------[ cut here ]------------
| [ 25.889485][ T313] WARNING: CPU: 2 PID: 313 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   25.890631][  T313] Modules linked in: veth bridge stp llc
| [   25.891640][  T313] Tainted: [W]=WARN
[   25.891887][  T313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 25.892298][ T313] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 25.892627][ T313] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   25.893771][  T313] RSP: 0018:ffffc90000b46ef0 EFLAGS: 00010246
[   25.894197][  T313] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   25.894670][  T313] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   25.895147][  T313] RBP: ffffc90000b46fe0 R08: 0000000000000000 R09: 0000000000000000
[   25.895615][  T313] R10: ffffc90000b47010 R11: ffffffff948b19b8 R12: 1ffff92000168de2
[   25.896093][  T313] R13: 00000000000005dc R14: ffffc90000b47010 R15: ffff88800dd9af08
[   25.896565][  T313] FS:  00007fc4e8277800(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
[   25.897121][  T313] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.897515][  T313] CR2: 00000000004e6888 CR3: 0000000009b3b006 CR4: 0000000000772ef0
[   25.898000][  T313] PKRU: 55555554
[   25.898242][  T313] Call Trace:
[   25.898483][  T313]  <TASK>
[ 25.898658][ T313] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 25.898997][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.899321][ T313] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 25.899640][ T313] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 25.900041][ T313] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 25.900364][ T313] netif_set_mtu (net/core/dev.c:9652) 
[ 25.900681][ T313] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 25.901024][ T313] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 25.901464][ T313] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 25.901709][ T313] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 25.902149][ T313] br_add_if (net/bridge/br_if.c:697) bridge 
[ 25.902521][ T313] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 25.902849][ T313] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 25.903182][ T313] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 25.903585][ T313] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.903904][ T313] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 25.904226][ T313] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.904555][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.904874][ T313] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 25.905201][ T313] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 25.905593][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.905924][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.906241][ T313] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 25.906563][ T313] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 25.906879][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.907206][ T313] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 25.907524][ T313] ? __create_object (mm/kmemleak.c:771) 
[ 25.907844][ T313] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 25.908174][ T313] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 25.908493][ T313] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 25.908894][ T313] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 25.909227][ T313] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 25.909549][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.909869][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.910198][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.910526][ T313] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 25.910847][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.911177][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 25.911497][ T313] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 25.911814][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.912145][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.912469][ T313] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 25.912799][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 25.913133][ T313] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 25.913463][ T313] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 25.913779][ T313] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 25.914111][ T313] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 25.914435][ T313] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 25.914760][ T313] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 25.915093][ T313] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 25.915418][ T313] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 25.915737][ T313] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 25.916068][ T313] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 25.916386][ T313] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 25.916705][ T313] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 25.917124][ T313] ___sys_sendmsg (net/socket.c:2670) 
[ 25.917440][ T313] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 25.917782][ T313] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 25.918185][ T313] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 25.918506][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.918827][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 25.919167][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 25.919486][ T313] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 25.919802][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 25.920136][ T313] __sys_sendmsg (net/socket.c:2700) 
[ 25.920458][ T313] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 25.920846][ T313] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 25.921184][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.921506][ T313] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.921824][ T313] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.922224][  T313] RIP: 0033:0x7fc4e84441e7
[ 25.922551][ T313] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   25.923671][  T313] RSP: 002b:00007ffd8666f078 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.924151][  T313] RAX: ffffffffffffffda RBX: 00007ffd8666f7a0 RCX: 00007fc4e84441e7
[   25.924620][  T313] RDX: 0000000000000000 RSI: 00007ffd8666f0e0 RDI: 0000000000000005
[   25.925100][  T313] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   25.925571][  T313] R10: 000000001fd4d910 R11: 0000000000000246 R12: 0000000000000003
[   25.926045][  T313] R13: 00000000686e7731 R14: 0000000000499600 R15: 0000000000000000
| [   26.652265][  T318] ------------[ cut here ]------------
| [ 26.652580][ T318] WARNING: CPU: 1 PID: 318 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   26.653221][  T318] Modules linked in: veth bridge stp llc
| [   26.654177][  T318] Tainted: [W]=WARN
[   26.654416][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 26.654815][ T318] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 26.655142][ T318] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   26.656250][  T318] RSP: 0018:ffffc900006d6ef0 EFLAGS: 00010246
[   26.656641][  T318] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   26.657107][  T318] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   26.657571][  T318] RBP: ffffc900006d6fe0 R08: 0000000000000000 R09: 0000000000000000
[   26.658182][  T318] R10: ffffc900006d7010 R11: ffffffff93f798a0 R12: 1ffff920000dade2
[   26.658646][  T318] R13: 00000000000005dc R14: ffffc900006d7010 R15: ffff88800dd9af08
[   26.659159][  T318] FS:  00007f38a0ee3800(0000) GS:ffff8880a0727000(0000) knlGS:0000000000000000
[   26.659698][  T318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.660098][  T318] CR2: 00000000004e6888 CR3: 0000000005399001 CR4: 0000000000772ef0
[   26.660565][  T318] PKRU: 55555554
[   26.660797][  T318] Call Trace:
[   26.661036][  T318]  <TASK>
[ 26.661197][ T318] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 26.661512][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.661831][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.662154][ T318] netif_set_mtu (net/core/dev.c:9652) 
[ 26.662467][ T318] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 26.662805][ T318] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 26.663060][ T318] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 26.663491][ T318] br_add_if (net/bridge/br_if.c:697) bridge 
[ 26.663843][ T318] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 26.664164][ T318] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 26.664478][ T318] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 26.664866][ T318] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 26.665188][ T318] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 26.665495][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 26.665809][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.666129][ T318] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 26.666440][ T318] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 26.666820][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 26.667140][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 26.667454][ T318] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 26.667761][ T318] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 26.668078][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.668385][ T318] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 26.668688][ T318] ? __create_object (mm/kmemleak.c:771) 
[ 26.669004][ T318] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 26.669311][ T318] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 26.669622][ T318] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 26.670011][ T318] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 26.670332][ T318] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 26.670644][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 26.670956][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.671266][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.671571][ T318] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 26.671874][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 26.672194][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 26.672498][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 26.672806][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 26.673126][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.673439][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 26.673754][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 26.674071][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 26.674394][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 26.674697][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 26.675014][ T318] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 26.675321][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 26.675633][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 26.675952][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 26.676260][ T318] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 26.676573][ T318] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 26.676884][ T318] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 26.677200][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 26.677510][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 26.677906][ T318] ___sys_sendmsg (net/socket.c:2670) 
[ 26.678220][ T318] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 26.678526][ T318] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 26.678912][ T318] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 26.679234][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.679543][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 26.679856][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 26.680171][ T318] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 26.680478][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 26.680792][ T318] __sys_sendmsg (net/socket.c:2700) 
[ 26.681100][ T318] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 26.681486][ T318] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 26.681805][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 26.682128][ T318] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 26.682447][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.682836][  T318] RIP: 0033:0x7f38a10b01e7
[ 26.683162][ T318] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   26.684270][  T318] RSP: 002b:00007ffdc9fc0ef8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   26.684735][  T318] RAX: ffffffffffffffda RBX: 00007ffdc9fc1620 RCX: 00007f38a10b01e7
[   26.685201][  T318] RDX: 0000000000000000 RSI: 00007ffdc9fc0f60 RDI: 0000000000000005
[   26.685667][  T318] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   26.686137][  T318] R10: 0000000033259910 R11: 0000000000000246 R12: 0000000000000003
[   26.686607][  T318] R13: 00000000686e7732 R14: 0000000000499600 R15: 0000000000000000
| [   27.433538][  T323] ------------[ cut here ]------------
| [ 27.433854][ T323] WARNING: CPU: 1 PID: 323 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   27.434480][  T323] Modules linked in: veth bridge stp llc
| [   27.435437][  T323] Tainted: [W]=WARN
[   27.435670][  T323] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.436065][ T323] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 27.436385][ T323] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   27.437485][  T323] RSP: 0018:ffffc900005e6ef0 EFLAGS: 00010246
[   27.437872][  T323] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   27.438342][  T323] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   27.438797][  T323] RBP: ffffc900005e6fe0 R08: 0000000000000000 R09: 0000000000000000
[   27.439401][  T323] R10: ffffc900005e7010 R11: ffffffff948b19b8 R12: 1ffff920000bcde2
[   27.439858][  T323] R13: 00000000000005dc R14: ffffc900005e7010 R15: ffff88800dd9af08
[   27.440328][  T323] FS:  00007fe765954800(0000) GS:ffff8880a0727000(0000) knlGS:0000000000000000
[   27.440861][  T323] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.441252][  T323] CR2: 00000000004e5770 CR3: 000000000b197003 CR4: 0000000000772ef0
[   27.441711][  T323] PKRU: 55555554
[   27.441947][  T323] Call Trace:
[   27.442178][  T323]  <TASK>
[ 27.442337][ T323] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 27.442646][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.442979][ T323] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 27.443285][ T323] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 27.443666][ T323] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 27.443985][ T323] netif_set_mtu (net/core/dev.c:9652) 
[ 27.444299][ T323] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 27.444615][ T323] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 27.445051][ T323] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 27.445284][ T323] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 27.445700][ T323] br_add_if (net/bridge/br_if.c:697) bridge 
[ 27.446061][ T323] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 27.446374][ T323] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 27.446682][ T323] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 27.447080][ T323] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 27.447389][ T323] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 27.447690][ T323] ? __kernel_text_address (kernel/extable.c:79) 
[ 27.448015][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.448324][ T323] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 27.448632][ T323] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 27.449019][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.449332][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.449633][ T323] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 27.449946][ T323] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 27.450254][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.450562][ T323] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 27.450862][ T323] ? __create_object (mm/kmemleak.c:771) 
[ 27.451174][ T323] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 27.451480][ T323] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 27.451789][ T323] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 27.452174][ T323] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 27.452497][ T323] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 27.452808][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 27.453121][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.453431][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.453734][ T323] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 27.454042][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 27.454354][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 27.454663][ T323] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 27.454977][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 27.455292][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.455601][ T323] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 27.455907][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 27.456219][ T323] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 27.456544][ T323] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 27.456846][ T323] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 27.457159][ T323] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 27.457469][ T323] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 27.457781][ T323] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 27.458096][ T323] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 27.458402][ T323] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 27.458717][ T323] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[ 27.459033][ T323] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 27.459339][ T323] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 27.459646][ T323] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 27.460044][ T323] ___sys_sendmsg (net/socket.c:2670) 
[ 27.460346][ T323] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 27.460654][ T323] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 27.461057][ T323] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 27.461366][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.461674][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.461996][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.462301][ T323] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 27.462609][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 27.462946][ T323] __sys_sendmsg (net/socket.c:2700) 
[ 27.463249][ T323] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 27.463631][ T323] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 27.463959][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.464264][ T323] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 27.464574][ T323] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.464958][  T323] RIP: 0033:0x7fe765b211e7
[ 27.465272][ T323] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   27.466374][  T323] RSP: 002b:00007fffca4af288 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.466839][  T323] RAX: ffffffffffffffda RBX: 00007fffca4af9b0 RCX: 00007fe765b211e7
[   27.467302][  T323] RDX: 0000000000000000 RSI: 00007fffca4af2f0 RDI: 0000000000000005
[   27.467763][  T323] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   27.468228][  T323] R10: 000000000a230910 R11: 0000000000000246 R12: 0000000000000003
[   27.468686][  T323] R13: 00000000686e7733 R14: 0000000000499600 R15: 0000000000000000
| [   42.698408][   T67] ------------[ cut here ]------------
| [ 42.698743][ T67] WARNING: CPU: 1 PID: 67 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   42.699309][   T67] 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
| [   42.701179][   T67] Tainted: [W]=WARN
[   42.701420][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.701880][   T67] Workqueue: netns cleanup_net
[ 42.702227][ T67] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 42.702557][ T67] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   42.703703][   T67] RSP: 0018:ffffc900004875b0 EFLAGS: 00010246
[   42.704113][   T67] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   42.704603][   T67] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   42.705090][   T67] RBP: ffffc900004876a0 R08: 0000000000000000 R09: 0000000000000000
[   42.705576][   T67] R10: ffffc900004876d0 R11: ffffffff906914d8 R12: 1ffff92000090eba
[   42.706062][   T67] R13: 00000000000005dc R14: ffffc900004876d0 R15: ffff88800dd9af08
[   42.706537][   T67] FS:  0000000000000000(0000) GS:ffff8880a0727000(0000) knlGS:0000000000000000
[   42.707135][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.707536][   T67] CR2: 00005556f007d0e8 CR3: 0000000014136002 CR4: 0000000000772ef0
[   42.708017][   T67] PKRU: 55555554
[   42.708260][   T67] Call Trace:
[   42.708493][   T67]  <TASK>
[ 42.708652][ T67] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 42.708985][ T67] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 42.709384][ T67] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 42.709827][ T67] ? br_device_event (net/bridge/br.c:141) bridge 
[ 42.710484][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 42.710962][ T67] ? ops_undo_list (net/core/net_namespace.c:250) 
[ 42.711281][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 42.711598][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 42.711928][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.712247][ T67] ? kthread (kernel/kthread.c:464) 
[ 42.712487][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.712811][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 42.713140][ T67] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.713472][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 42.713793][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 42.714139][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 42.714383][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 42.714826][ T67] br_del_if (net/bridge/br_if.c:743) bridge 
[ 42.715186][ T67] br_device_event (net/bridge/br.c:141) bridge 
[ 42.715533][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 42.715972][ T67] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 42.716294][ T67] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 42.716613][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 42.717018][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 42.717338][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 42.717727][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 42.718125][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.718518][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 42.718925][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 42.719239][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 42.719645][ T67] ops_undo_list (net/core/net_namespace.c:250) 
[ 42.719974][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 42.720288][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 42.720618][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 42.720943][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 42.721267][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.721588][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 42.721931][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 42.722264][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 42.722593][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 42.722936][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 42.723259][ T67] kthread (kernel/kthread.c:464) 
[ 42.723496][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.723820][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 42.724142][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 42.724456][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.724776][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.725098][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 42.725423][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 42.725736][ T67] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   43.316458][   T67] ------------[ cut here ]------------
| [ 43.316778][ T67] WARNING: CPU: 0 PID: 67 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   43.317328][   T67] 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
| [   43.319019][   T67] Tainted: [W]=WARN
[   43.319253][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   43.319636][   T67] Workqueue: netns cleanup_net
[ 43.319966][ T67] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 43.320284][ T67] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   43.321392][   T67] RSP: 0018:ffffc900004875b0 EFLAGS: 00010246
[   43.321780][   T67] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   43.322247][   T67] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   43.322710][   T67] RBP: ffffc900004876a0 R08: 0000000000000000 R09: 0000000000000000
[   43.323189][   T67] R10: ffffc900004876d0 R11: ffffffff93f798a0 R12: 1ffff92000090eba
[   43.323652][   T67] R13: 00000000000005dc R14: ffffc900004876d0 R15: ffff88800dd9af08
[   43.324120][   T67] FS:  0000000000000000(0000) GS:ffff8880a06a7000(0000) knlGS:0000000000000000
[   43.324663][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.325062][   T67] CR2: 00007ffd9d85fe98 CR3: 0000000004e6e002 CR4: 0000000000772ef0
[   43.325529][   T67] PKRU: 55555554
[   43.325762][   T67] Call Trace:
[   43.326001][   T67]  <TASK>
[ 43.326157][ T67] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 43.326471][ T67] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 43.326856][ T67] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 43.327220][ T67] ? br_device_event (net/bridge/br.c:141) bridge 
[ 43.327564][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 43.327871][ T67] ? ops_undo_list (net/core/net_namespace.c:250) 
[ 43.328185][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 43.328493][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 43.328803][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 43.329118][ T67] ? kthread (kernel/kthread.c:464) 
[ 43.329352][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 43.329659][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 43.329977][ T67] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.330294][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 43.330614][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 43.330951][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 43.331187][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 43.331614][ T67] br_del_if (net/bridge/br_if.c:743) bridge 
[ 43.331969][ T67] br_device_event (net/bridge/br.c:141) bridge 
[ 43.332311][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 43.332727][ T67] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 43.333060][ T67] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 43.333395][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 43.333784][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 43.334097][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 43.334477][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 43.334857][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 43.335249][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 43.335641][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 43.335956][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 43.336347][ T67] ops_undo_list (net/core/net_namespace.c:250) 
[ 43.336660][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 43.336971][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 43.337286][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 43.337592][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 43.337902][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.338223][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 43.338544][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 43.338860][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 43.339179][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 43.339497][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 43.339807][ T67] kthread (kernel/kthread.c:464) 
[ 43.340047][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.340352][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 43.340658][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 43.340974][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.341285][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.341594][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 43.341898][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.342211][ T67] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   43.912531][   T67] ------------[ cut here ]------------
| [ 43.912898][ T67] WARNING: CPU: 2 PID: 67 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   43.913485][   T67] 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
| [   43.915222][   T67] Tainted: [W]=WARN
[   43.915500][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   43.915905][   T67] Workqueue: netns cleanup_net
[ 43.916268][ T67] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 43.916625][ T67] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   43.917777][   T67] RSP: 0018:ffffc900004875b0 EFLAGS: 00010246
[   43.918196][   T67] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   43.918695][   T67] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   43.919198][   T67] RBP: ffffc900004876a0 R08: 0000000000000000 R09: 0000000000000000
[   43.919694][   T67] R10: ffffc900004876d0 R11: ffffffff93f798a0 R12: 1ffff92000090eba
[   43.920190][   T67] R13: 00000000000005dc R14: ffffc900004876d0 R15: ffff88800dd9af08
[   43.920683][   T67] FS:  0000000000000000(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
[   43.921251][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.921673][   T67] CR2: 00007f7f30d6fb00 CR3: 0000000014136006 CR4: 0000000000772ef0
[   43.922170][   T67] PKRU: 55555554
[   43.922421][   T67] Call Trace:
[   43.922667][   T67]  <TASK>
[ 43.922843][ T67] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 43.923197][ T67] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 43.923616][ T67] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 43.924006][ T67] ? br_device_event (net/bridge/br.c:141) bridge 
[ 43.924370][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 43.924711][ T67] ? ops_undo_list (net/core/net_namespace.c:250) 
[ 43.925048][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 43.925375][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 43.925730][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 43.926075][ T67] ? kthread (kernel/kthread.c:464) 
[ 43.926323][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 43.926801][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 43.927150][ T67] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.927489][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 43.927813][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 43.928173][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 43.928421][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 43.928873][ T67] br_del_if (net/bridge/br_if.c:743) bridge 
[ 43.929243][ T67] br_device_event (net/bridge/br.c:141) bridge 
[ 43.929602][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 43.930046][ T67] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 43.930388][ T67] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 43.930726][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 43.931150][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 43.931483][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 43.931880][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 43.932286][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 43.932684][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 43.933115][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 43.933438][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 43.933852][ T67] ops_undo_list (net/core/net_namespace.c:250) 
[ 43.934196][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 43.934518][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 43.934851][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 43.935195][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 43.935533][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.935863][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 43.936202][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 43.936535][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 43.936861][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 43.937202][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 43.937526][ T67] kthread (kernel/kthread.c:464) 
[ 43.937776][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.938106][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 43.938424][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 43.938748][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.939086][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.939413][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 43.939732][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 43.940065][ T67] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   44.387350][   T67] ------------[ cut here ]------------
| [ 44.387696][ T67] WARNING: CPU: 2 PID: 67 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   44.388276][   T67] 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
| [   44.389980][   T67] Tainted: [W]=WARN
[   44.390228][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   44.390633][   T67] Workqueue: netns cleanup_net
[ 44.390978][ T67] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 44.391307][ T67] Code: 00 00 8b 05 67 1b 38 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 aa d0 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 67 1b 38 02    	mov    0x2381b67(%rip),%eax        # 0x2381b6f
   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 aa d0 79 00       	call   0x79d0cb
  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
[   44.392441][   T67] RSP: 0018:ffffc900004875b0 EFLAGS: 00010246
[   44.392862][   T67] RAX: 0000000000000000 RBX: ffff88800dd9a000 RCX: 0000000000000001
[   44.393348][   T67] RDX: 0000000000000000 RSI: ffffffff93a9f52e RDI: ffffffff9325a5a0
[   44.393817][   T67] RBP: ffffc900004876a0 R08: 0000000000000000 R09: 0000000000000000
[   44.394301][   T67] R10: ffffc900004876d0 R11: ffffffff93f798a0 R12: 1ffff92000090eba
[   44.394775][   T67] R13: 00000000000005dc R14: ffffc900004876d0 R15: ffff88800dd9af08
[   44.395258][   T67] FS:  0000000000000000(0000) GS:ffff8880a07a7000(0000) knlGS:0000000000000000
[   44.395810][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.396218][   T67] CR2: 00007f6df9a91000 CR3: 0000000014136006 CR4: 0000000000772ef0
[   44.396697][   T67] PKRU: 55555554
[   44.396952][   T67] Call Trace:
[   44.397195][   T67]  <TASK>
[ 44.397364][ T67] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 44.397690][ T67] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 44.398092][ T67] ? br_del_if (net/bridge/br_if.c:742) bridge 
[ 44.398460][ T67] ? br_device_event (net/bridge/br.c:141) bridge 
[ 44.398812][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 44.399154][ T67] ? ops_undo_list (net/core/net_namespace.c:250) 
[ 44.399476][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 44.399795][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 44.400128][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 44.400448][ T67] ? kthread (kernel/kthread.c:464) 
[ 44.400692][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 44.401022][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 44.401344][ T67] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 44.401685][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 44.402020][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 44.402358][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 44.402607][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 44.403062][ T67] br_del_if (net/bridge/br_if.c:743) bridge 
[ 44.403423][ T67] br_device_event (net/bridge/br.c:141) bridge 
[ 44.403776][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) bridge 
[ 44.404219][ T67] ? netconsole_netdev_event (drivers/net/netconsole.c:1474) 
[ 44.404548][ T67] notifier_call_chain (kernel/notifier.c:87 (discriminator 2)) 
[ 44.404881][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 44.405302][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 44.405622][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 44.406029][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 44.406428][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 44.406826][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 44.407239][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 44.407563][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 44.407975][ T67] ops_undo_list (net/core/net_namespace.c:250) 
[ 44.408302][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 44.408620][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 44.408964][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 44.409289][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 44.409615][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 44.409950][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 44.410283][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 44.410612][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 44.410946][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 44.411278][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 44.411606][ T67] kthread (kernel/kthread.c:464) 
[ 44.411853][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 44.412182][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 44.412502][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 44.412832][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 44.413164][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 44.413487][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 44.413808][ T67] ? __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