======================================
| [   19.031354][  T304] veth1: entered promiscuous mode
| [   19.035852][  T304] ------------[ cut here ]------------
| [ 19.036198][ T304] WARNING: CPU: 1 PID: 304 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) 
| [   19.036975][  T304] Modules linked in: bridge stp llc 8021q vrf veth
[   19.038656][  T304] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.039059][ T304] 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) 
[ 19.039404][ T304] 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
[   19.040553][  T304] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   19.040963][  T304] RAX: 0000000000000000 RBX: ffff888014e52000 RCX: 0000000000000001
[   19.041455][  T304] RDX: 0000000000000000 RSI: ffffffff8b29b941 RDI: ffffffff8aa555e0
[   19.041955][  T304] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   19.042604][  T304] R10: ffffc90000587010 R11: ffffffff8c0a8918 R12: 1ffff920000b0de2
[   19.043130][  T304] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff888014e52f08
[   19.043765][  T304] FS:  00007f1317f07800(0000) GS:ffff8880a8f37000(0000) knlGS:0000000000000000
[   19.044465][  T304] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.044851][  T304] CR2: 00000000004e5aa8 CR3: 0000000004c4d004 CR4: 0000000000772ef0
[   19.045343][  T304] PKRU: 55555554
[   19.045573][  T304] Call Trace:
[   19.045802][  T304]  <TASK>
[ 19.045966][ T304] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 19.046282][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.046596][ T304] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 19.046898][ T304] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.047289][ T304] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.047600][ T304] netif_set_mtu (net/core/dev.c:9652) 
[ 19.047913][ T304] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 19.048246][ T304] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 19.048675][ T304] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 19.048907][ T304] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 19.049544][ T304] br_add_if (net/bridge/br_if.c:697) bridge 
[ 19.049899][ T304] do_set_master (net/core/rtnetlink.c:2948) 
[ 19.050217][ T304] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 19.050637][ T304] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 19.051024][ T304] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 19.051341][ T304] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 19.051721][ T304] ? __kernel_text_address (kernel/extable.c:79) 
[ 19.052043][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.052396][ T304] ? __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) 
[ 19.052717][ T304] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 19.053098][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.053421][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.053730][ T304] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 19.054065][ T304] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 19.054384][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.054690][ T304] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 19.054991][ T304] ? __create_object (mm/kmemleak.c:771) 
[ 19.055316][ T304] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 19.055630][ T304] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 19.055936][ T304] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.056341][ T304] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 19.056658][ T304] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 19.056972][ T304] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.057294][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.057619][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.057926][ T304] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 19.058249][ T304] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.058591][ T304] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.058902][ T304] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 19.059213][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.059606][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.059918][ T304] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 19.060248][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.060556][ T304] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 19.060876][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 19.061183][ T304] ? 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) 
[ 19.061507][ T304] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 19.061835][ T304] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 19.062144][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.062475][ T304] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 19.062787][ T304] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 19.063094][ T304] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 19.063420][ T304] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 19.063731][ T304] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 19.064037][ T304] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 19.064446][ T304] ___sys_sendmsg (net/socket.c:2670) 
[ 19.064760][ T304] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.065069][ T304] ? __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) 
[ 19.065465][ T304] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 19.065804][ T304] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 19.066113][ T304] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 19.066440][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.066756][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.067073][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.067392][ T304] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 19.067707][ T304] __sys_sendmsg (net/socket.c:2700) 
[ 19.068012][ T304] ? __rseq_handle_notify_resume (kernel/rseq.c:442) 
[ 19.068403][ T304] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 19.068727][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.069074][ T304] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.069396][ T304] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.069790][  T304] RIP: 0033:0x7f13180d41e7
[ 19.070114][ T304] 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)
[   19.071225][  T304] RSP: 002b:00007fff5f157608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.071731][  T304] RAX: ffffffffffffffda RBX: 00007fff5f157d30 RCX: 00007f13180d41e7
[   19.072194][  T304] RDX: 0000000000000000 RSI: 00007fff5f157670 RDI: 0000000000000005
[   19.072668][  T304] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   19.073134][  T304] R10: 000000002a522910 R11: 0000000000000246 R12: 0000000000000004
[   19.073618][  T304] R13: 00000000686e471a R14: 0000000000499600 R15: 0000000000000000
| [   19.213796][  T306] ------------[ cut here ]------------
| [ 19.214179][ T306] WARNING: CPU: 0 PID: 306 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) 
| [   19.215114][  T306] Modules linked in: bridge stp llc 8021q vrf veth
| [   19.216212][  T306] Tainted: [W]=WARN
[   19.216464][  T306] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.216898][ T306] 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) 
[ 19.217267][ T306] 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
[   19.218471][  T306] RSP: 0018:ffffc90000b56ef0 EFLAGS: 00010246
[   19.218942][  T306] RAX: 0000000000000000 RBX: ffff888014e52000 RCX: 0000000000000001
[   19.219602][  T306] RDX: 0000000000000000 RSI: ffffffff8b29b941 RDI: ffffffff8aa555e0
[   19.220105][  T306] RBP: ffffc90000b56fe0 R08: 0000000000000000 R09: 0000000000000000
[   19.220613][  T306] R10: ffffc90000b57010 R11: ffffffff8c0a8918 R12: 1ffff9200016ade2
[   19.221125][  T306] R13: 00000000000005dc R14: ffffc90000b57010 R15: ffff888014e52f08
[   19.221712][  T306] FS:  00007f38224aa800(0000) GS:ffff8880a8eb7000(0000) knlGS:0000000000000000
[   19.222423][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.222890][  T306] CR2: 00000000004e5ab0 CR3: 0000000014e99001 CR4: 0000000000772ef0
[   19.223429][  T306] PKRU: 55555554
[   19.223765][  T306] Call Trace:
[   19.224040][  T306]  <TASK>
[ 19.224220][ T306] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 19.224557][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.224908][ T306] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 19.225222][ T306] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.225651][ T306] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.226003][ T306] netif_set_mtu (net/core/dev.c:9652) 
[ 19.226337][ T306] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 19.226677][ T306] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 19.227179][ T306] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 19.227441][ T306] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 19.227902][ T306] br_add_if (net/bridge/br_if.c:697) bridge 
[ 19.228298][ T306] do_set_master (net/core/rtnetlink.c:2948) 
[ 19.228644][ T306] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 19.228992][ T306] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 19.229404][ T306] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 19.229727][ T306] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 19.230068][ T306] ? __kernel_text_address (kernel/extable.c:79) 
[ 19.230417][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.230733][ T306] ? __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) 
[ 19.231059][ T306] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 19.231453][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.232060][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.232385][ T306] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 19.232724][ T306] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 19.233053][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.233727][ T306] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 19.234111][ T306] ? __create_object (mm/kmemleak.c:771) 
[ 19.234670][ T306] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 19.234998][ T306] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 19.235762][ T306] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.236160][ T306] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 19.236484][ T306] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 19.236811][ T306] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.237120][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.237671][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.237994][ T306] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 19.238316][ T306] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.238656][ T306] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.238977][ T306] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 19.239308][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.239620][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.239949][ T306] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 19.240269][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.240583][ T306] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 19.240938][ T306] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 19.241275][ T306] ? 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) 
[ 19.241601][ T306] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 19.241944][ T306] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 19.242266][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.242821][ T306] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 19.243141][ T306] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 19.243472][ T306] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 19.243796][ T306] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 19.244114][ T306] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 19.245143][ T306] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 19.245679][ T306] ___sys_sendmsg (net/socket.c:2670) 
[ 19.246077][ T306] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.246507][ T306] ? __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) 
[ 19.246977][ T306] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 19.247307][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.247626][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.248073][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.248419][ T306] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 19.248730][ T306] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.249059][ T306] __sys_sendmsg (net/socket.c:2700) 
[ 19.249466][ T306] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 19.249948][ T306] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 19.250379][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.250753][ T306] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.251457][ T306] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.252031][  T306] RIP: 0033:0x7f38226771e7
[ 19.252373][ T306] 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)
[   19.253749][  T306] RSP: 002b:00007ffc5d615aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.254324][  T306] RAX: ffffffffffffffda RBX: 00007ffc5d6161d0 RCX: 00007f38226771e7
[   19.254833][  T306] RDX: 0000000000000000 RSI: 00007ffc5d615b10 RDI: 0000000000000005
[   19.255351][  T306] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   19.256057][  T306] R10: 0000000023a5d910 R11: 0000000000000246 R12: 0000000000000004
[   19.256525][  T306] R13: 00000000686e471a R14: 0000000000499600 R15: 0000000000000000
| [   83.683719][  T591] ------------[ cut here ]------------
| [ 83.684069][ T591] WARNING: CPU: 2 PID: 591 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) 
| [   83.686298][  T591] Modules linked in: act_gact cls_flower sch_ingress bridge stp llc 8021q vrf veth
| [   83.688365][  T591] Tainted: [W]=WARN
[   83.688879][  T591] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 83.689496][ T591] 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) 
[ 83.690328][ T591] 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
[   83.692115][  T591] RSP: 0018:ffffc90001086ef0 EFLAGS: 00010246
[   83.692775][  T591] RAX: 0000000000000000 RBX: ffff888004ed2000 RCX: 0000000000000001
[   83.693438][  T591] RDX: 0000000000000000 RSI: ffffffff8b29b941 RDI: ffffffff8aa555e0
[   83.693920][  T591] RBP: ffffc90001086fe0 R08: 0000000000000000 R09: 0000000000000000
[   83.694412][  T591] R10: ffffc90001087010 R11: ffffffff8c0a8918 R12: 1ffff92000210de2
[   83.694888][  T591] R13: 00000000000005dc R14: ffffc90001087010 R15: ffff888004ed2f08
[   83.695428][  T591] FS:  00007fdc4f1e7800(0000) GS:ffff8880a8fb7000(0000) knlGS:0000000000000000
[   83.695988][  T591] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.696405][  T591] CR2: 00000000004e5aa0 CR3: 000000000c1a4003 CR4: 0000000000772ef0
[   83.696900][  T591] PKRU: 55555554
[   83.697156][  T591] Call Trace:
[   83.697421][  T591]  <TASK>
[ 83.697606][ T591] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 83.697942][ T591] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 83.698280][ T591] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 83.698606][ T591] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 83.699017][ T591] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 83.699395][ T591] netif_set_mtu (net/core/dev.c:9652) 
[ 83.699727][ T591] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 83.700072][ T591] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 83.700547][ T591] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 83.700799][ T591] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 83.701281][ T591] br_add_if (net/bridge/br_if.c:697) bridge 
[ 83.701679][ T591] ? cycle_netdev (drivers/net/vrf.c:1055) vrf 
[ 83.702033][ T591] do_set_master (net/core/rtnetlink.c:2948) 
[ 83.702378][ T591] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 83.702716][ T591] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 83.703126][ T591] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 83.703502][ T591] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 83.703839][ T591] ? __kernel_text_address (kernel/extable.c:79) 
[ 83.704165][ T591] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 83.704509][ T591] ? __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) 
[ 83.704841][ T591] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 83.705259][ T591] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 83.705594][ T591] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 83.705925][ T591] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 83.706272][ T591] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 83.706627][ T591] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 83.706959][ T591] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 83.707565][ T591] ? __create_object (mm/kmemleak.c:771) 
[ 83.707914][ T591] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 83.708269][ T591] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 83.708595][ T591] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 83.708997][ T591] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 83.709357][ T591] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 83.709696][ T591] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 83.710256][ T591] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 83.710598][ T591] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 83.710927][ T591] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 83.711525][ T591] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 83.711912][ T591] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 83.712492][ T591] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 83.712829][ T591] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 83.713166][ T591] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 83.713524][ T591] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 83.714088][ T591] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 83.714422][ T591] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 83.714760][ T591] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 83.715349][ T591] ? 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) 
[ 83.715687][ T591] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 83.716019][ T591] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 83.716580][ T591] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 83.716911][ T591] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 83.717249][ T591] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 83.717591][ T591] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 83.717932][ T591] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 83.718272][ T591] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 83.718594][ T591] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 83.719257][ T591] ___sys_sendmsg (net/socket.c:2670) 
[ 83.719617][ T591] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 83.719939][ T591] ? __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) 
[ 83.720579][ T591] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 83.720902][ T591] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 83.721476][ T591] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 83.721827][ T591] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 83.722205][ T591] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 83.723011][ T591] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 83.723391][ T591] __sys_sendmsg (net/socket.c:2700) 
[ 83.723717][ T591] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 83.724350][ T591] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 83.724914][ T591] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 83.725265][ T591] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 83.725602][ T591] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   83.726013][  T591] RIP: 0033:0x7fdc4f3b41e7
[ 83.726356][ T591] 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)
[   83.727913][  T591] RSP: 002b:00007ffe169c4f68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   83.728412][  T591] RAX: ffffffffffffffda RBX: 00007ffe169c5690 RCX: 00007fdc4f3b41e7
[   83.729128][  T591] RDX: 0000000000000000 RSI: 00007ffe169c4fd0 RDI: 0000000000000005
[   83.729864][  T591] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   83.730369][  T591] R10: 0000000017a0e910 R11: 0000000000000246 R12: 0000000000000004


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