======================================
| [   21.255634][  T317] veth1: entered promiscuous mode
| [   21.258005][  T317] ------------[ cut here ]------------
| [ 21.258335][ T317] WARNING: CPU: 3 PID: 317 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   21.259330][  T317] Modules linked in: bridge stp llc vrf veth
[   21.260401][  T317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.260804][ T317] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 21.261164][ T317] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 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 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   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 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   21.262531][  T317] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   21.262965][  T317] RAX: 0000000000000000 RBX: ffff88800ba42000 RCX: 0000000000000001
[   21.263438][  T317] RDX: 0000000000000000 RSI: ffffffff8629b939 RDI: ffffffff85a555e0
[   21.263915][  T317] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.264400][  T317] R10: ffffc90000587010 R11: ffffffff870a8918 R12: 1ffff920000b0de2
[   21.264879][  T317] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff88800ba42f08
[   21.265382][  T317] FS:  00007fb9f885a800(0000) GS:ffff8880ae037000(0000) knlGS:0000000000000000
[   21.265936][  T317] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.266327][  T317] CR2: 00000000004e5aa8 CR3: 000000000b7ce001 CR4: 0000000000772ef0
[   21.266809][  T317] PKRU: 55555554
[   21.267049][  T317] Call Trace:
[   21.267285][  T317]  <TASK>
[ 21.267463][ T317] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.267822][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.268150][ T317] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.268480][ T317] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.268888][ T317] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.269222][ T317] netif_set_mtu (net/core/dev.c:9652) 
[ 21.269546][ T317] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.269876][ T317] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.270338][ T317] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.270581][ T317] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.271034][ T317] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.271402][ T317] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.271733][ T317] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.272048][ T317] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.272438][ T317] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.272762][ T317] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.273079][ T317] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.273394][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.273715][ T317] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 21.274027][ T317] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.274410][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.274733][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.275044][ T317] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.275359][ T317] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.275675][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.275987][ T317] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.276296][ T317] ? __create_object (mm/kmemleak.c:771) 
[ 21.276611][ T317] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.276933][ T317] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.277243][ T317] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.277646][ T317] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.278007][ T317] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.278322][ T317] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.278643][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.278961][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.279272][ T317] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.279582][ T317] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.279902][ T317] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.280239][ T317] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.280556][ T317] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.280879][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.281197][ T317] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.281507][ T317] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.281828][ T317] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.282153][ T317] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.282463][ T317] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 21.282787][ T317] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.283107][ T317] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.283412][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.283739][ T317] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.284054][ T317] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.284364][ T317] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.284693][ T317] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.285018][ T317] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.285330][ T317] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.285733][ T317] ___sys_sendmsg (net/socket.c:2670) 
[ 21.286045][ T317] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.286356][ T317] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 21.286754][ T317] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.287066][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.287383][ T317] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.287717][ T317] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.288023][ T317] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.288333][ T317] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.288933][ T317] __sys_sendmsg (net/socket.c:2700) 
[ 21.289238][ T317] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.289626][ T317] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.289957][ T317] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.290265][ T317] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.290570][ T317] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.290954][  T317] RIP: 0033:0x7fb9f8a271e7
[ 21.291280][ T317] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   21.292400][  T317] RSP: 002b:00007fff80ac0d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.292915][  T317] RAX: ffffffffffffffda RBX: 00007fff80ac14c0 RCX: 00007fb9f8a271e7
[   21.293412][  T317] RDX: 0000000000000000 RSI: 00007fff80ac0e00 RDI: 0000000000000005
[   21.293903][  T317] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.294632][  T317] R10: 000000002476a910 R11: 0000000000000246 R12: 0000000000000004
[   21.295116][  T317] R13: 00000000686e751b R14: 0000000000499600 R15: 0000000000000000
| [   21.432388][  T318] ------------[ cut here ]------------
| [ 21.432749][ T318] WARNING: CPU: 2 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) 
| [   21.433481][  T318] Modules linked in: bridge stp llc vrf veth
| [   21.434716][  T318] Tainted: [W]=WARN
[   21.434972][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.435378][ 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) 
[ 21.435739][ T318] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 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 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   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 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   21.436894][  T318] RSP: 0018:ffffc90000576ef0 EFLAGS: 00010246
[   21.437304][  T318] RAX: 0000000000000000 RBX: ffff88800ba42000 RCX: 0000000000000001
[   21.437841][  T318] RDX: 0000000000000000 RSI: ffffffff8629b939 RDI: ffffffff85a555e0
[   21.438339][  T318] RBP: ffffc90000576fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.438819][  T318] R10: ffffc90000577010 R11: ffffffff870a8918 R12: 1ffff920000aede2
[   21.439310][  T318] R13: 00000000000005dc R14: ffffc90000577010 R15: ffff88800ba42f08
[   21.439805][  T318] FS:  00007ff461f9c800(0000) GS:ffff8880adfb7000(0000) knlGS:0000000000000000
[   21.440353][  T318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.440799][  T318] CR2: 00000000004e5ab0 CR3: 000000000c8ce002 CR4: 0000000000772ef0
[   21.441270][  T318] PKRU: 55555554
[   21.441511][  T318] Call Trace:
[   21.441786][  T318]  <TASK>
[ 21.441963][ T318] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.442288][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.442629][ T318] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.442951][ T318] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.443344][ T318] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.443680][ T318] netif_set_mtu (net/core/dev.c:9652) 
[ 21.443999][ T318] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.444447][ T318] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.444909][ T318] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.445154][ T318] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.445607][ T318] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.445993][ T318] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.446318][ T318] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.446653][ T318] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.447054][ T318] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.447373][ T318] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.447733][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.448060][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.448380][ 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) 
[ 21.448712][ T318] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.449102][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.449425][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.449755][ T318] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.450100][ T318] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.450421][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.450756][ T318] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.451074][ T318] ? __create_object (mm/kmemleak.c:771) 
[ 21.451422][ T318] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.451757][ T318] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.452079][ T318] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.452471][ T318] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.452817][ T318] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.453162][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.453477][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.453812][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.454130][ T318] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.454472][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.454802][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.455122][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.455437][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.455797][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.456119][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.456438][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.456769][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.457128][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.457467][ 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) 
[ 21.457831][ T318] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.458153][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.458468][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.458803][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.459155][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.459476][ T318] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.459815][ T318] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.460136][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.460477][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.460891][ T318] ___sys_sendmsg (net/socket.c:2670) 
[ 21.461209][ T318] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.461530][ 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) 
[ 21.461943][ T318] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.462267][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.462587][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.462976][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.463295][ 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) 
[ 21.463625][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.463977][ T318] __sys_sendmsg (net/socket.c:2700) 
[ 21.464301][ T318] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.464707][ T318] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.465038][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.465358][ T318] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.465688][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.466075][  T318] RIP: 0033:0x7ff4621691e7
[ 21.466413][ 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)
[   21.467584][  T318] RSP: 002b:00007ffc69ef6c08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.468074][  T318] RAX: ffffffffffffffda RBX: 00007ffc69ef7330 RCX: 00007ff4621691e7
[   21.468546][  T318] RDX: 0000000000000000 RSI: 00007ffc69ef6c70 RDI: 0000000000000005
[   21.469061][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.469533][  T318] R10: 000000002201b910 R11: 0000000000000246 R12: 0000000000000004
[   21.470018][  T318] R13: 00000000686e751c R14: 0000000000499600 R15: 0000000000000000
| [   21.597564][  T319] ------------[ cut here ]------------
| [ 21.597935][ T319] WARNING: CPU: 3 PID: 319 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   21.598551][  T319] Modules linked in: bridge stp llc vrf veth
| [   21.599575][  T319] Tainted: [W]=WARN
[   21.599820][  T319] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.600206][ T319] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 21.600526][ T319] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 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 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   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 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   21.601620][  T319] RSP: 0018:ffffc90000566ef0 EFLAGS: 00010246
[   21.602010][  T319] RAX: 0000000000000000 RBX: ffff88800ba42000 RCX: 0000000000000001
[   21.602481][  T319] RDX: 0000000000000000 RSI: ffffffff8629b939 RDI: ffffffff85a555e0
[   21.602950][  T319] RBP: ffffc90000566fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.603411][  T319] R10: ffffc90000567010 R11: ffffffff870a8918 R12: 1ffff920000acde2
[   21.603872][  T319] R13: 00000000000005dc R14: ffffc90000567010 R15: ffff88800ba42f08
[   21.604336][  T319] FS:  00007f8e373c2800(0000) GS:ffff8880ae037000(0000) knlGS:0000000000000000
[   21.604874][  T319] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.605263][  T319] CR2: 00007f4378632380 CR3: 000000000ca28004 CR4: 0000000000772ef0
[   21.605738][  T319] PKRU: 55555554
[   21.605969][  T319] Call Trace:
[   21.606199][  T319]  <TASK>
[ 21.606358][ T319] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.606679][ T319] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.607017][ T319] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.607326][ T319] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.607724][ T319] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.608030][ T319] netif_set_mtu (net/core/dev.c:9652) 
[ 21.608335][ T319] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.608658][ T319] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.609092][ T319] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.609326][ T319] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.609756][ T319] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.610109][ T319] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.610422][ T319] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.610764][ T319] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.611159][ T319] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.611467][ T319] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.611781][ T319] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.612095][ T319] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.612406][ T319] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 21.612725][ T319] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.613149][ T319] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.613471][ T319] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.613786][ T319] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.614099][ T319] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.614406][ T319] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.614722][ T319] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.615028][ T319] ? __create_object (mm/kmemleak.c:771) 
[ 21.615337][ T319] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.615652][ T319] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.615968][ T319] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.616347][ T319] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.616667][ T319] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.616981][ T319] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.617288][ T319] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.617626][ T319] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.617934][ T319] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.618241][ T319] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.618556][ T319] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.618871][ T319] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.619181][ T319] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.619491][ T319] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.619809][ T319] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.620117][ T319] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.620425][ T319] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.620759][ T319] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.621081][ T319] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 21.621406][ T319] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.621738][ T319] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.622061][ T319] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.622395][ T319] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.622719][ T319] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.623034][ T319] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.623348][ T319] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.623668][ T319] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.623975][ T319] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.624366][ T319] ___sys_sendmsg (net/socket.c:2670) 
[ 21.624681][ T319] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.624991][ T319] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 21.625380][ T319] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.625700][ T319] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.626009][ T319] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.626319][ T319] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.626632][ T319] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.626941][ T319] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.627253][ T319] __sys_sendmsg (net/socket.c:2700) 
[ 21.627566][ T319] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.627966][ T319] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.628293][ T319] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.628602][ T319] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.628920][ T319] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.629301][  T319] RIP: 0033:0x7f8e3758f1e7
[ 21.629632][ T319] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   21.630741][  T319] RSP: 002b:00007fff93dd99f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.631206][  T319] RAX: ffffffffffffffda RBX: 00007fff93dda120 RCX: 00007f8e3758f1e7
[   21.631674][  T319] RDX: 0000000000000000 RSI: 00007fff93dd9a60 RDI: 0000000000000005
[   21.632137][  T319] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.632592][  T319] R10: 0000000010baa910 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:br_mtu_auto_adjust:br_add_if