======================================
| [   21.173813][  T318] veth1: entered promiscuous mode
| [   21.186737][  T318] ------------[ cut here ]------------
| [ 21.187121][ T318] WARNING: CPU: 0 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) 
| [   21.188606][  T318] Modules linked in: bridge stp llc vrf veth
[   21.189812][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.190265][ 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) 
[ 21.190637][ T318] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 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 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   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 1a 63 7b 00       	call   0x7b633b
  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
[   21.191890][  T318] RSP: 0018:ffffc900005e6ef0 EFLAGS: 00010246
[   21.192347][  T318] RAX: 0000000000000000 RBX: ffff88800a88a000 RCX: 0000000000000001
[   21.192914][  T318] RDX: 0000000000000000 RSI: ffffffff9bc9b941 RDI: ffffffff9b4555e0
[   21.193468][  T318] RBP: ffffc900005e6fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.194003][  T318] R10: ffffc900005e7010 R11: ffffffff9caa8918 R12: 1ffff920000bcde2
[   21.194549][  T318] R13: 00000000000005dc R14: ffffc900005e7010 R15: ffff88800a88af08
[   21.195082][  T318] FS:  00007f1023c6f800(0000) GS:ffff8880984b7000(0000) knlGS:0000000000000000
[   21.195969][  T318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.196472][  T318] CR2: 00000000004e5aa8 CR3: 000000000c3b0002 CR4: 0000000000772ef0
[   21.197013][  T318] PKRU: 55555554
[   21.197289][  T318] Call Trace:
[   21.197573][  T318]  <TASK>
[ 21.197758][ T318] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.198126][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.198493][ T318] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.198852][ T318] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.199296][ T318] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.199671][ T318] netif_set_mtu (net/core/dev.c:9652) 
[ 21.200044][ T318] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.200413][ T318] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.200969][ T318] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.201215][ T318] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.201654][ T318] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.202011][ T318] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.202326][ T318] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.202648][ T318] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.203037][ T318] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.203345][ T318] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.203668][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.203980][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.204298][ 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) 
[ 21.204611][ T318] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.204994][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.205303][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.205613][ T318] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.205976][ T318] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.206365][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.206741][ T318] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.207099][ T318] ? __create_object (mm/kmemleak.c:771) 
[ 21.207473][ T318] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.207838][ T318] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.208191][ T318] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.208649][ T318] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.209007][ T318] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.209362][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.209727][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.210098][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.210469][ T318] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.210828][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.211191][ T318] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.211566][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.211917][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.212280][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.212642][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.213005][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.213358][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.213738][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.214104][ 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) 
[ 21.214467][ T318] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.214828][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.215175][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.215554][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.215903][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.216264][ T318] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.216644][ T318] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.216999][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.217342][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.217794][ T318] ___sys_sendmsg (net/socket.c:2670) 
[ 21.218139][ T318] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.218495][ 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) 
[ 21.218931][ T318] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.219282][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.219648][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.220005][ T318] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.220359][ 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) 
[ 21.220715][ T318] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.221071][ T318] __sys_sendmsg (net/socket.c:2700) 
[ 21.221417][ T318] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.221860][ T318] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.222222][ T318] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.222587][ T318] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.222938][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.223370][  T318] RIP: 0033:0x7f1023e3c1e7
[ 21.223741][ 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)
[   21.225004][  T318] RSP: 002b:00007ffc1f7164c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.225559][  T318] RAX: ffffffffffffffda RBX: 00007ffc1f716bf0 RCX: 00007f1023e3c1e7
[   21.226104][  T318] RDX: 0000000000000000 RSI: 00007ffc1f716530 RDI: 0000000000000005
[   21.226672][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.227524][  T318] R10: 000000003a850910 R11: 0000000000000246 R12: 0000000000000004
[   21.228286][  T318] R13: 00000000686e4000 R14: 0000000000499600 R15: 0000000000000000
| [   21.359139][  T320] ------------[ cut here ]------------
| [ 21.359462][ T320] WARNING: CPU: 3 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) 
| [   21.360065][  T320] Modules linked in: bridge stp llc vrf veth
| [   21.361089][  T320] Tainted: [W]=WARN
[   21.361335][  T320] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.361729][ 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) 
[ 21.362048][ T320] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 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 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   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 1a 63 7b 00       	call   0x7b633b
  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
[   21.363142][  T320] RSP: 0018:ffffc900005e6ef0 EFLAGS: 00010246
[   21.363540][  T320] RAX: 0000000000000000 RBX: ffff88800a88a000 RCX: 0000000000000001
[   21.364001][  T320] RDX: 0000000000000000 RSI: ffffffff9bc9b941 RDI: ffffffff9b4555e0
[   21.364468][  T320] RBP: ffffc900005e6fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.364920][  T320] R10: ffffc900005e7010 R11: ffffffff9caa8918 R12: 1ffff920000bcde2
[   21.365386][  T320] R13: 00000000000005dc R14: ffffc900005e7010 R15: ffff88800a88af08
[   21.365858][  T320] FS:  00007fbbdb5a9800(0000) GS:ffff888098637000(0000) knlGS:0000000000000000
[   21.366409][  T320] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.366841][  T320] CR2: 00000000004e5ab0 CR3: 0000000009605003 CR4: 0000000000772ef0
[   21.367312][  T320] PKRU: 55555554
[   21.367552][  T320] Call Trace:
[   21.367783][  T320]  <TASK>
[ 21.367943][ T320] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.368253][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.368594][ T320] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.368905][ T320] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.369314][ T320] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.369636][ T320] netif_set_mtu (net/core/dev.c:9652) 
[ 21.369948][ T320] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.370267][ T320] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.370727][ T320] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.370964][ T320] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.371387][ T320] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.371756][ T320] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.372071][ T320] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.372386][ T320] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.372806][ T320] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.373117][ T320] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.373421][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.373778][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.374104][ 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) 
[ 21.374438][ T320] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.374926][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.375238][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.375561][ T320] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.375896][ T320] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.376205][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.376536][ T320] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.376841][ T320] ? __create_object (mm/kmemleak.c:771) 
[ 21.377156][ T320] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.377477][ T320] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.377790][ T320] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.378175][ T320] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.378498][ T320] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.378810][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.379111][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.379425][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.379743][ T320] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.380046][ T320] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.380355][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.380675][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.380983][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.381292][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.381638][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.381954][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.382261][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.382588][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.382891][ 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) 
[ 21.383197][ T320] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.383514][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.383823][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.384141][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.384458][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.384764][ T320] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.385093][ T320] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.385403][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.385719][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.386113][ T320] ___sys_sendmsg (net/socket.c:2670) 
[ 21.386450][ T320] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.386755][ 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) 
[ 21.387370][ T320] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.387691][ T320] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.388018][ T320] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.388327][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.388875][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.389196][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.389520][ T320] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 21.389831][ T320] __sys_sendmsg (net/socket.c:2700) 
[ 21.390362][ T320] ? __rseq_handle_notify_resume (kernel/rseq.c:442) 
[ 21.390759][ T320] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.391075][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.391386][ T320] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.391928][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.392310][  T320] RIP: 0033:0x7fbbdb7761e7
[ 21.392634][ 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)
[   21.394034][  T320] RSP: 002b:00007ffd747dd348 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.394532][  T320] RAX: ffffffffffffffda RBX: 00007ffd747dda70 RCX: 00007fbbdb7761e7
[   21.395015][  T320] RDX: 0000000000000000 RSI: 00007ffd747dd3b0 RDI: 0000000000000005
[   21.395509][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.396218][  T320] R10: 0000000025736910 R11: 0000000000000246 R12: 0000000000000004
[   21.396705][  T320] R13: 00000000686e4001 R14: 0000000000499600 R15: 0000000000000000
| [   21.545003][  T321] ------------[ cut here ]------------
| [ 21.545311][ T321] WARNING: CPU: 1 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) 
| [   21.547456][  T321] Modules linked in: bridge stp llc vrf veth
| [   21.548661][  T321] Tainted: [W]=WARN
[   21.548896][  T321] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.549278][ 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) 
[ 21.549630][ T321] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 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 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   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 1a 63 7b 00       	call   0x7b633b
  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
[   21.550735][  T321] RSP: 0018:ffffc900005e6ef0 EFLAGS: 00010246
[   21.551124][  T321] RAX: 0000000000000000 RBX: ffff88800a88a000 RCX: 0000000000000001
[   21.551597][  T321] RDX: 0000000000000000 RSI: ffffffff9bc9b941 RDI: ffffffff9b4555e0
[   21.552051][  T321] RBP: ffffc900005e6fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.552514][  T321] R10: ffffc900005e7010 R11: ffffffff9caa8918 R12: 1ffff920000bcde2
[   21.552969][  T321] R13: 00000000000005dc R14: ffffc900005e7010 R15: ffff88800a88af08
[   21.553455][  T321] FS:  00007f56e783f800(0000) GS:ffff888098537000(0000) knlGS:0000000000000000
[   21.553987][  T321] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.554370][  T321] CR2: 00000000004e5ac0 CR3: 0000000009605004 CR4: 0000000000772ef0
[   21.554833][  T321] PKRU: 55555554
[   21.555063][  T321] Call Trace:
[   21.555290][  T321]  <TASK>
[ 21.555459][ T321] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.555775][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.556088][ T321] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.556412][ T321] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.556802][ T321] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.557113][ T321] netif_set_mtu (net/core/dev.c:9652) 
[ 21.557417][ T321] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.557743][ T321] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.558184][ T321] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.558416][ T321] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.558843][ T321] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.559200][ T321] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.559517][ T321] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.559825][ T321] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.560219][ T321] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.560552][ T321] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.560861][ T321] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.561170][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.561496][ 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) 
[ 21.561804][ T321] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.562193][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.562560][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.562867][ T321] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.563169][ T321] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.563482][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.563788][ T321] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.564090][ T321] ? __create_object (mm/kmemleak.c:771) 
[ 21.564400][ T321] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.564715][ T321] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.565035][ T321] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.565473][ T321] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.565787][ T321] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.566104][ T321] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.566450][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.566768][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.567075][ T321] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.567380][ T321] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.567709][ T321] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.568015][ T321] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.568323][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.568642][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.568960][ T321] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.569269][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.569586][ T321] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.569914][ T321] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.570217][ 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) 
[ 21.570530][ T321] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.570838][ T321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.571146][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.571479][ T321] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.571802][ T321] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.572117][ T321] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.572454][ T321] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.572777][ T321] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.573078][ T321] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.573495][ T321] ___sys_sendmsg (net/socket.c:2670) 
[ 21.573803][ T321] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.574112][ 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) 
[ 21.574516][ T321] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.574825][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.575134][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.575454][ T321] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.575763][ 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) 
[ 21.576068][ T321] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.576477][ T321] __sys_sendmsg (net/socket.c:2700) 
[ 21.576791][ T321] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.577182][ T321] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.577516][ T321] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.577824][ T321] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.578134][ T321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.578527][  T321] RIP: 0033:0x7f56e7a0c1e7
[ 21.578845][ 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)
[   21.579951][  T321] RSP: 002b:00007ffcf19f6cf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.580413][  T321] RAX: ffffffffffffffda RBX: 00007ffcf19f7420 RCX: 00007f56e7a0c1e7
[   21.580880][  T321] RDX: 0000000000000000 RSI: 00007ffcf19f6d60 RDI: 0000000000000005
[   21.581346][  T321] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.581815][  T321] R10: 0000000017479910 R11: 0000000000000246 R12: 0000000000000004


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