======================================
| [   21.026167][  T318] veth1: entered promiscuous mode
| [   21.028519][  T318] ------------[ cut here ]------------
| [ 21.028881][ 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) 
| [   21.029543][  T318] Modules linked in: bridge stp llc vrf veth
[   21.030638][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.031062][ 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) 
[ 21.031425][ 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
[   21.032844][  T318] RSP: 0018:ffffc90000546ef0 EFLAGS: 00010246
[   21.033436][  T318] RAX: 0000000000000000 RBX: ffff88800533a000 RCX: 0000000000000001
[   21.034119][  T318] RDX: 0000000000000000 RSI: ffffffffb8e9b939 RDI: ffffffffb86555e0
[   21.034778][  T318] RBP: ffffc90000546fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.035285][  T318] R10: ffffc90000547010 R11: ffffffffb9ca8918 R12: 1ffff920000a8de2
[   21.035776][  T318] R13: 00000000000005dc R14: ffffc90000547010 R15: ffff88800533af08
[   21.036253][  T318] FS:  00007f5c6951e800(0000) GS:ffff88807b3b7000(0000) knlGS:0000000000000000
[   21.036838][  T318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.037266][  T318] CR2: 00000000004e5aa8 CR3: 000000000cecd002 CR4: 0000000000772ef0
[   21.037787][  T318] PKRU: 55555554
[   21.038052][  T318] Call Trace:
[   21.038527][  T318]  <TASK>
[ 21.038729][ T318] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.039077][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.039424][ T318] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.039779][ T318] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.040202][ T318] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.040562][ T318] netif_set_mtu (net/core/dev.c:9652) 
[ 21.040902][ T318] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.041248][ T318] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.041721][ T318] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.041987][ T318] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.042448][ T318] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.042840][ T318] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.043185][ T318] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.043531][ T318] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.043944][ T318] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.044292][ T318] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.044624][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.044955][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.045287][ 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) 
[ 21.045619][ T318] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.046015][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.046341][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.046675][ T318] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.046997][ T318] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.047341][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.047679][ T318] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.048003][ T318] ? __create_object (mm/kmemleak.c:771) 
[ 21.048335][ T318] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.048682][ T318] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.049025][ T318] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.049422][ T318] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.049777][ T318] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.050104][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.050420][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.050758][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.051078][ T318] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.051396][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.051729][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.052050][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.052371][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.052702][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.053041][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.053386][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.053729][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.054080][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.054401][ 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) 
[ 21.054734][ T318] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.055073][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.055406][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.055756][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.056097][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.056434][ T318] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.056807][ T318] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.057165][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.057527][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.057936][ T318] ___sys_sendmsg (net/socket.c:2670) 
[ 21.058253][ T318] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.058599][ 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) 
[ 21.059032][ T318] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.059359][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.059706][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.060308][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.061122][ 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) 
[ 21.061463][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.061807][ T318] __sys_sendmsg (net/socket.c:2700) 
[ 21.062133][ T318] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.062539][ T318] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.062874][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.063196][ T318] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.063990][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.064623][  T318] RIP: 0033:0x7f5c696eb1e7
[ 21.064979][ T318] Code: Unable to access opcode bytes at 0x7f5c696eb1bd.

Code starting with the faulting instruction
===========================================
[   21.065404][  T318] RSP: 002b:00007ffdf3504708 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.066135][  T318] RAX: ffffffffffffffda RBX: 00007ffdf3504e30 RCX: 00007f5c696eb1e7
[   21.066849][  T318] RDX: 0000000000000000 RSI: 00007ffdf3504770 RDI: 0000000000000005
[   21.067345][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.068098][  T318] R10: 000000000c909910 R11: 0000000000000246 R12: 0000000000000004
[   21.068589][  T318] R13: 00000000686e69f9 R14: 0000000000499600 R15: 0000000000000000
| [   21.192648][  T320] ------------[ cut here ]------------
| [ 21.192982][ T320] WARNING: CPU: 2 PID: 320 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) 
| [   21.193625][  T320] Modules linked in: bridge stp llc vrf veth
| [   21.194676][  T320] Tainted: [W]=WARN
[   21.194927][  T320] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.195323][ T320] 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) 
[ 21.195758][ T320] 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
[   21.197051][  T320] RSP: 0018:ffffc90000596ef0 EFLAGS: 00010246
[   21.197540][  T320] RAX: 0000000000000000 RBX: ffff88800533a000 RCX: 0000000000000001
[   21.198090][  T320] RDX: 0000000000000000 RSI: ffffffffb8e9b939 RDI: ffffffffb86555e0
[   21.198646][  T320] RBP: ffffc90000596fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.199185][  T320] R10: ffffc90000597010 R11: ffffffffb9ca8918 R12: 1ffff920000b2de2
[   21.199750][  T320] R13: 00000000000005dc R14: ffffc90000597010 R15: ffff88800533af08
[   21.200289][  T320] FS:  00007f4499c64800(0000) GS:ffff88807b3b7000(0000) knlGS:0000000000000000
[   21.200913][  T320] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.201381][  T320] CR2: 00000000004e5ab0 CR3: 000000000cdbb005 CR4: 0000000000772ef0
[   21.201933][  T320] PKRU: 55555554
[   21.202213][  T320] Call Trace:
[   21.202503][  T320]  <TASK>
[ 21.202699][ T320] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.203080][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.203477][ T320] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.203854][ T320] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.204311][ T320] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.204698][ T320] netif_set_mtu (net/core/dev.c:9652) 
[ 21.205075][ T320] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.205501][ T320] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.206000][ T320] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.206303][ T320] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.206811][ T320] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.207226][ T320] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.207639][ T320] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.208017][ T320] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.208484][ T320] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.208867][ T320] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.209232][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.209616][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.210002][ T320] ? __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) 
[ 21.210372][ T320] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.210841][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.211215][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.211596][ T320] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.211982][ T320] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.212355][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.212742][ T320] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.213108][ T320] ? __create_object (mm/kmemleak.c:771) 
[ 21.213491][ T320] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.213867][ T320] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.214237][ T320] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.214724][ T320] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.215095][ T320] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.215479][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.215842][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.216208][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.216590][ T320] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.216951][ T320] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.217334][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.217709][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.218073][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.218468][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.218838][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.219207][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.219579][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.219954][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.220308][ T320] ? 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) 
[ 21.220686][ T320] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.221052][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.221411][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.221796][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.222178][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.222552][ T320] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.222925][ T320] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.223288][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.223666][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.224122][ T320] ___sys_sendmsg (net/socket.c:2670) 
[ 21.224510][ T320] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.224874][ T320] ? __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) 
[ 21.225319][ T320] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.225694][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.226065][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.226438][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.226812][ T320] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.227172][ T320] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.227564][ T320] __sys_sendmsg (net/socket.c:2700) 
[ 21.227925][ T320] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.228367][ T320] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.228751][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.229123][ T320] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.229496][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.229943][  T320] RIP: 0033:0x7f4499e311e7
[ 21.230315][ T320] 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)
[   21.231582][  T320] RSP: 002b:00007ffe7223a528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.232365][  T320] RAX: ffffffffffffffda RBX: 00007ffe7223ac50 RCX: 00007f4499e311e7
[   21.232921][  T320] RDX: 0000000000000000 RSI: 00007ffe7223a590 RDI: 0000000000000005
[   21.233469][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.234015][  T320] R10: 000000000b92f910 R11: 0000000000000246 R12: 0000000000000004
[   21.234583][  T320] R13: 00000000686e69f9 R14: 0000000000499600 R15: 0000000000000000
| [   21.368154][  T321] ------------[ cut here ]------------
| [ 21.368505][ T321] WARNING: CPU: 0 PID: 321 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) 
| [   21.369142][  T321] Modules linked in: bridge stp llc vrf veth
| [   21.370232][  T321] Tainted: [W]=WARN
[   21.370766][  T321] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.371173][ T321] 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) 
[ 21.371514][ T321] 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
[   21.372663][  T321] RSP: 0018:ffffc90000546ef0 EFLAGS: 00010246
[   21.373055][  T321] RAX: 0000000000000000 RBX: ffff88800533a000 RCX: 0000000000000001
[   21.373537][  T321] RDX: 0000000000000000 RSI: ffffffffb8e9b939 RDI: ffffffffb86555e0
[   21.374032][  T321] RBP: ffffc90000546fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.374511][  T321] R10: ffffc90000547010 R11: ffffffffb9ca8918 R12: 1ffff920000a8de2
[   21.375034][  T321] R13: 00000000000005dc R14: ffffc90000547010 R15: ffff88800533af08
[   21.375525][  T321] FS:  00007fdfba21e800(0000) GS:ffff88807b2b7000(0000) knlGS:0000000000000000
[   21.376085][  T321] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.376498][  T321] CR2: 00000000004e5ac0 CR3: 000000000ced3006 CR4: 0000000000772ef0
[   21.376986][  T321] PKRU: 55555554
[   21.377235][  T321] Call Trace:
[   21.377519][  T321]  <TASK>
[ 21.377689][ T321] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.378013][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.378344][ T321] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.378693][ T321] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.379108][ T321] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.379440][ T321] netif_set_mtu (net/core/dev.c:9652) 
[ 21.379791][ T321] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.380130][ T321] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.380592][ T321] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.380836][ T321] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.381279][ T321] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.381665][ T321] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 21.382004][ T321] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.382331][ T321] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.382751][ T321] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.383072][ T321] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.383391][ T321] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.383722][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.384059][ T321] ? __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) 
[ 21.384394][ T321] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.384821][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.385155][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.385504][ T321] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.385829][ T321] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.386154][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.386486][ T321] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.386812][ T321] ? __create_object (mm/kmemleak.c:771) 
[ 21.387135][ T321] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.387495][ T321] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.387825][ T321] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.388233][ T321] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.388611][ T321] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.388942][ T321] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.389264][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.389627][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.389950][ T321] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.390267][ T321] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.390597][ T321] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.390914][ T321] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.391233][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.391565][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.391898][ T321] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.392216][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.392542][ T321] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.392873][ T321] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.393189][ T321] ? 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) 
[ 21.393526][ T321] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 21.393850][ T321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.394172][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.394506][ T321] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.394831][ T321] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.395150][ T321] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.395488][ T321] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.395809][ T321] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.396125][ T321] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.396549][ T321] ___sys_sendmsg (net/socket.c:2670) 
[ 21.396868][ T321] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.397186][ T321] ? __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) 
[ 21.397616][ T321] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.397938][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.398262][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.398592][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.398909][ T321] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.399315][ T321] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.399634][ T321] __sys_sendmsg (net/socket.c:2700) 
[ 21.399934][ T321] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.400309][ T321] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.400650][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.400957][ T321] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.401260][ T321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.401659][  T321] RIP: 0033:0x7fdfba3eb1e7
[ 21.401984][ T321] 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)
[   21.403079][  T321] RSP: 002b:00007ffccf446b08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.403555][  T321] RAX: ffffffffffffffda RBX: 00007ffccf447230 RCX: 00007fdfba3eb1e7
[   21.404013][  T321] RDX: 0000000000000000 RSI: 00007ffccf446b70 RDI: 0000000000000005
[   21.404494][  T321] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.404955][  T321] R10: 00000000129e8910 R11: 0000000000000246 R12: 0000000000000004


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