======================================
| [   21.072390][  T320] veth1: entered promiscuous mode
| [   21.074665][  T320] ------------[ cut here ]------------
| [ 21.074991][ 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) 
| [   21.076089][  T320] Modules linked in: bridge stp llc vrf veth
[   21.077119][  T320] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.077533][ 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) 
[ 21.077858][ 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
[   21.078972][  T320] RSP: 0018:ffffc90000656ef0 EFLAGS: 00010246
[   21.079580][  T320] RAX: 0000000000000000 RBX: ffff88800df12000 RCX: 0000000000000001
[   21.080050][  T320] RDX: 0000000000000000 RSI: ffffffff93e9b941 RDI: ffffffff936555e0
[   21.080764][  T320] RBP: ffffc90000656fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.081234][  T320] R10: ffffc90000657010 R11: ffffffff94ca8918 R12: 1ffff920000cade2
[   21.081894][  T320] R13: 00000000000005dc R14: ffffc90000657010 R15: ffff88800df12f08
[   21.082504][  T320] FS:  00007f4b1f3b3800(0000) GS:ffff8880a0437000(0000) knlGS:0000000000000000
[   21.083055][  T320] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.083592][  T320] CR2: 00000000004e5aa8 CR3: 000000000b7e5004 CR4: 0000000000772ef0
[   21.084057][  T320] PKRU: 55555554
[   21.084299][  T320] Call Trace:
[   21.084677][  T320]  <TASK>
[ 21.084846][ T320] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.085221][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.085694][ T320] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.086003][ T320] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.086402][ T320] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.086714][ T320] netif_set_mtu (net/core/dev.c:9652) 
[ 21.087029][ T320] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.087345][ T320] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.087971][ T320] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.088210][ T320] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.088645][ T320] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.089002][ T320] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.089324][ T320] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.089646][ T320] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.090043][ T320] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.090365][ T320] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.090672][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.090988][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.091304][ 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) 
[ 21.091623][ T320] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.092009][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.092323][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.092637][ T320] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.092940][ T320] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.093249][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.093575][ T320] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.093887][ T320] ? __create_object (mm/kmemleak.c:771) 
[ 21.094205][ T320] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.094523][ T320] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.094845][ T320] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.095276][ T320] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.095599][ T320] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.095912][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.096220][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.096544][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.096859][ T320] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.097195][ T320] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.097515][ T320] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.097828][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.098138][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.098457][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.098772][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.099085][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.099404][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.099726][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.100032][ 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) 
[ 21.100343][ T320] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.100664][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.100973][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.101286][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.101615][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.101921][ T320] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.102254][ T320] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.102602][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.102913][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.103307][ T320] ___sys_sendmsg (net/socket.c:2670) 
[ 21.103619][ T320] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.103931][ 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) 
[ 21.104314][ T320] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.104635][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.104948][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.105309][ T320] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.105626][ 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) 
[ 21.105940][ T320] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.106258][ T320] __sys_sendmsg (net/socket.c:2700) 
[ 21.106571][ T320] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.106949][ T320] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.107268][ T320] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.107585][ T320] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.107903][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.108287][  T320] RIP: 0033:0x7f4b1f5801e7
[ 21.108632][ 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)
[   21.109743][  T320] RSP: 002b:00007ffdfa937348 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.110211][  T320] RAX: ffffffffffffffda RBX: 00007ffdfa937a70 RCX: 00007f4b1f5801e7
[   21.110693][  T320] RDX: 0000000000000000 RSI: 00007ffdfa9373b0 RDI: 0000000000000005
[   21.111442][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.111905][  T320] R10: 000000003c7e5910 R11: 0000000000000246 R12: 0000000000000004
[   21.112377][  T320] R13: 00000000686e161c R14: 0000000000499600 R15: 0000000000000000
| [   21.224176][  T322] ------------[ cut here ]------------
| [ 21.224496][ T322] WARNING: CPU: 0 PID: 322 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   21.225121][  T322] Modules linked in: bridge stp llc vrf veth
| [   21.226146][  T322] Tainted: [W]=WARN
[   21.226389][  T322] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.226772][ T322] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 21.227083][ T322] 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
[   21.229201][  T322] RSP: 0018:ffffc90000ba6ef0 EFLAGS: 00010246
[   21.229604][  T322] RAX: 0000000000000000 RBX: ffff88800df12000 RCX: 0000000000000001
[   21.230058][  T322] RDX: 0000000000000000 RSI: ffffffff93e9b941 RDI: ffffffff936555e0
[   21.230522][  T322] RBP: ffffc90000ba6fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.230976][  T322] R10: ffffc90000ba7010 R11: ffffffff94ca8918 R12: 1ffff92000174de2
[   21.231443][  T322] R13: 00000000000005dc R14: ffffc90000ba7010 R15: ffff88800df12f08
[   21.231911][  T322] FS:  00007fc8dfb09800(0000) GS:ffff8880a02b7000(0000) knlGS:0000000000000000
[   21.232451][  T322] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.232835][  T322] CR2: 00000000004e5ab0 CR3: 000000000bd7b001 CR4: 0000000000772ef0
[   21.233294][  T322] PKRU: 55555554
[   21.233532][  T322] Call Trace:
[   21.233761][  T322]  <TASK>
[ 21.233920][ T322] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.234233][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.234559][ T322] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.234865][ T322] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.235253][ T322] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.235569][ T322] netif_set_mtu (net/core/dev.c:9652) 
[ 21.235876][ T322] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.236192][ T322] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.236630][ T322] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.236870][ T322] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.237290][ T322] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.237655][ T322] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.237967][ T322] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.238277][ T322] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.238675][ T322] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.238985][ T322] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.239290][ T322] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.239608][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.239918][ T322] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 21.240223][ T322] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.240610][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.240920][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.241224][ T322] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.241541][ T322] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.241847][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.242155][ T322] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.242465][ T322] ? __create_object (mm/kmemleak.c:771) 
[ 21.242773][ T322] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.243082][ T322] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.243393][ T322] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.243880][ T322] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.244194][ T322] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.244512][ T322] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.244817][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.245143][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.245459][ T322] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.245788][ T322] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.246096][ T322] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.246414][ T322] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.246722][ T322] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.247056][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.247392][ T322] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.247700][ T322] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.248007][ T322] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.248326][ T322] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.248639][ T322] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 21.248947][ T322] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.249256][ T322] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.249570][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.249881][ T322] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.250191][ T322] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.250509][ T322] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.250832][ T322] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.251142][ T322] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.251459][ T322] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.251858][ T322] ___sys_sendmsg (net/socket.c:2670) 
[ 21.252166][ T322] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.252483][ T322] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 21.252870][ T322] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.253189][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.253513][ T322] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.253831][ T322] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.254143][ T322] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.254459][ T322] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.254781][ T322] __sys_sendmsg (net/socket.c:2700) 
[ 21.255095][ T322] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.255491][ T322] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.256043][ T322] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.256359][ T322] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.256670][ T322] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.257049][  T322] RIP: 0033:0x7fc8dfcd61e7
[ 21.257373][ T322] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   21.258473][  T322] RSP: 002b:00007ffe1ac36478 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.259159][  T322] RAX: ffffffffffffffda RBX: 00007ffe1ac36ba0 RCX: 00007fc8dfcd61e7
[   21.259851][  T322] RDX: 0000000000000000 RSI: 00007ffe1ac364e0 RDI: 0000000000000005
[   21.260307][  T322] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.261006][  T322] R10: 000000000a5e6910 R11: 0000000000000246 R12: 0000000000000004
[   21.261698][  T322] R13: 00000000686e161d R14: 0000000000499600 R15: 0000000000000000
| [   21.393015][  T323] ------------[ cut here ]------------
| [ 21.393326][ T323] WARNING: CPU: 3 PID: 323 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   21.393947][  T323] Modules linked in: bridge stp llc vrf veth
| [   21.394978][  T323] Tainted: [W]=WARN
[   21.395217][  T323] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.395607][ T323] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 21.395917][ T323] 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
[   21.397016][  T323] RSP: 0018:ffffc900005c6ef0 EFLAGS: 00010246
[   21.397409][  T323] RAX: 0000000000000000 RBX: ffff88800df12000 RCX: 0000000000000001
[   21.397866][  T323] RDX: 0000000000000000 RSI: ffffffff93e9b941 RDI: ffffffff936555e0
[   21.398321][  T323] RBP: ffffc900005c6fe0 R08: 0000000000000000 R09: 0000000000000000
[   21.398803][  T323] R10: ffffc900005c7010 R11: ffffffff94ca8918 R12: 1ffff920000b8de2
[   21.399261][  T323] R13: 00000000000005dc R14: ffffc900005c7010 R15: ffff88800df12f08
[   21.399983][  T323] FS:  00007f6f6886d800(0000) GS:ffff8880a0437000(0000) knlGS:0000000000000000
[   21.400760][  T323] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.401146][  T323] CR2: 00000000004e5ac0 CR3: 000000000dd21003 CR4: 0000000000772ef0
[   21.401754][  T323] PKRU: 55555554
[   21.401982][  T323] Call Trace:
[   21.402208][  T323]  <TASK>
[ 21.402445][ T323] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.402749][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.403057][ T323] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 21.403381][ T323] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.403762][ T323] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 21.404066][ T323] netif_set_mtu (net/core/dev.c:9652) 
[ 21.404384][ T323] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.404701][ T323] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 21.405134][ T323] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.405376][ T323] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 21.405794][ T323] br_add_if (net/bridge/br_if.c:697) bridge 
[ 21.406152][ T323] do_set_master (net/core/rtnetlink.c:2948) 
[ 21.406474][ T323] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 21.406786][ T323] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 21.407171][ T323] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.407483][ T323] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.407784][ T323] ? __kernel_text_address (kernel/extable.c:79) 
[ 21.408090][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.408412][ T323] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113) 
[ 21.408715][ T323] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 21.409090][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.409406][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.409708][ T323] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 21.410016][ T323] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 21.410319][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.410641][ T323] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 21.410945][ T323] ? __create_object (mm/kmemleak.c:771) 
[ 21.411251][ T323] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.411582][ T323] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 21.411888][ T323] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.412262][ T323] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 21.412584][ T323] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 21.412900][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.413208][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.413527][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.413830][ T323] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 21.414129][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.414480][ T323] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 21.414783][ T323] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 21.415094][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.415427][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.415736][ T323] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 21.416039][ T323] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 21.416343][ T323] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 21.416668][ T323] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 21.416970][ T323] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 21.417274][ T323] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 21.417596][ T323] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 21.417897][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.418205][ T323] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 21.418522][ T323] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 21.418830][ T323] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 21.419140][ T323] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 21.419456][ T323] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 21.419759][ T323] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 21.420151][ T323] ___sys_sendmsg (net/socket.c:2670) 
[ 21.420458][ T323] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.420762][ T323] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 21.421138][ T323] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 21.421456][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.421765][ T323] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.422072][ T323] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.422387][ T323] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 21.422689][ T323] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.423000][ T323] __sys_sendmsg (net/socket.c:2700) 
[ 21.423298][ T323] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 21.423681][ T323] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 21.423996][ T323] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.424301][ T323] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.424617][ T323] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.425005][  T323] RIP: 0033:0x7f6f68a3a1e7
[ 21.425327][ T323] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   21.426417][  T323] RSP: 002b:00007fff897849a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   21.426883][  T323] RAX: ffffffffffffffda RBX: 00007fff897850d0 RCX: 00007f6f68a3a1e7
[   21.427336][  T323] RDX: 0000000000000000 RSI: 00007fff89784a10 RDI: 0000000000000005
[   21.427798][  T323] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   21.428253][  T323] R10: 000000003ebce910 R11: 0000000000000246 R12: 0000000000000004


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