======================================
| [   19.910985][  T306] veth1: entered promiscuous mode
| [   19.913877][  T306] ------------[ cut here ]------------
| [ 19.914231][ T306] WARNING: CPU: 1 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) 
| [   19.915046][  T306] Modules linked in: bridge stp llc 8021q vrf veth
[   19.916245][  T306] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.916643][ 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) 
[ 19.917144][ T306] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   19.918485][  T306] RSP: 0018:ffffc90000626ef0 EFLAGS: 00010246
[   19.919110][  T306] RAX: 0000000000000000 RBX: ffff88800cf22000 RCX: 0000000000000001
[   19.919578][  T306] RDX: 0000000000000000 RSI: ffffffff9ba9b939 RDI: ffffffff9b2555e0
[   19.920207][  T306] RBP: ffffc90000626fe0 R08: 0000000000000000 R09: 0000000000000000
[   19.920862][  T306] R10: ffffc90000627010 R11: ffffffff9c8a8918 R12: 1ffff920000c4de2
[   19.921333][  T306] R13: 00000000000005dc R14: ffffc90000627010 R15: ffff88800cf22f08
[   19.921944][  T306] FS:  00007f07ec891800(0000) GS:ffff888091937000(0000) knlGS:0000000000000000
[   19.922482][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.923028][  T306] CR2: 00000000004e5aa8 CR3: 0000000009076006 CR4: 0000000000772ef0
[   19.923511][  T306] PKRU: 55555554
[   19.924005][  T306] Call Trace:
[   19.924239][  T306]  <TASK>
[ 19.924438][ T306] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 19.925001][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.925334][ T306] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 19.925643][ T306] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.926200][ T306] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.926520][ T306] netif_set_mtu (net/core/dev.c:9652) 
[ 19.926872][ T306] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 19.927187][ T306] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 19.927629][ T306] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 19.927891][ T306] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 19.928313][ T306] br_add_if (net/bridge/br_if.c:697) bridge 
[ 19.928683][ T306] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 19.929018][ T306] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 19.929335][ T306] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 19.929734][ T306] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 19.930088][ T306] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 19.930393][ T306] ? __kernel_text_address (kernel/extable.c:79) 
[ 19.930721][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.931061][ 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) 
[ 19.931692][ T306] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 19.932079][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.932390][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.932711][ T306] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 19.933036][ T306] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 19.933367][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.933699][ T306] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 19.934026][ T306] ? __create_object (mm/kmemleak.c:771) 
[ 19.934365][ T306] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 19.934702][ T306] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 19.935022][ T306] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.935423][ T306] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 19.935773][ T306] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 19.936099][ T306] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.936429][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.936804][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.937145][ T306] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 19.937475][ T306] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.937813][ T306] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.938135][ T306] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 19.938469][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.938811][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.939164][ T306] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 19.939500][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.939830][ T306] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 19.940171][ T306] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 19.940490][ 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) 
[ 19.940823][ T306] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 19.941165][ T306] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 19.941505][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.941847][ T306] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 19.942171][ T306] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 19.942509][ T306] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 19.942859][ T306] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 19.943185][ T306] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 19.943502][ T306] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 19.943942][ T306] ___sys_sendmsg (net/socket.c:2670) 
[ 19.944257][ T306] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.944580][ 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) 
[ 19.945002][ T306] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 19.945328][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.945656][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.946036][ T306] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.946356][ 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) 
[ 19.946708][ T306] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.947053][ T306] __sys_sendmsg (net/socket.c:2700) 
[ 19.947368][ T306] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 19.947780][ T306] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 19.948120][ T306] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.948451][ T306] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.948781][ T306] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.949189][  T306] RIP: 0033:0x7f07eca5e1e7
[ 19.949538][ 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)
[   19.950699][  T306] RSP: 002b:00007fff48f9fc88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.951202][  T306] RAX: ffffffffffffffda RBX: 00007fff48fa03b0 RCX: 00007f07eca5e1e7
[   19.951694][  T306] RDX: 0000000000000000 RSI: 00007fff48f9fcf0 RDI: 0000000000000005
[   19.952180][  T306] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   19.952695][  T306] R10: 0000000008521910 R11: 0000000000000246 R12: 0000000000000004
[   19.953215][  T306] R13: 00000000686e6565 R14: 0000000000499600 R15: 0000000000000000
| [   20.069402][  T307] ------------[ cut here ]------------
| [ 20.069756][ T307] WARNING: CPU: 2 PID: 307 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) 
| [   20.070393][  T307] Modules linked in: bridge stp llc 8021q vrf veth
| [   20.071508][  T307] Tainted: [W]=WARN
[   20.071845][  T307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.072269][ T307] 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) 
[ 20.072626][ T307] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   20.073813][  T307] RSP: 0018:ffffc900005d6ef0 EFLAGS: 00010246
[   20.074223][  T307] RAX: 0000000000000000 RBX: ffff88800cf22000 RCX: 0000000000000001
[   20.074715][  T307] RDX: 0000000000000000 RSI: ffffffff9ba9b939 RDI: ffffffff9b2555e0
[   20.075220][  T307] RBP: ffffc900005d6fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.075726][  T307] R10: ffffc900005d7010 R11: ffffffff9c8a8918 R12: 1ffff920000bade2
[   20.076233][  T307] R13: 00000000000005dc R14: ffffc900005d7010 R15: ffff88800cf22f08
[   20.076748][  T307] FS:  00007f51df8e5800(0000) GS:ffff8880919b7000(0000) knlGS:0000000000000000
[   20.077303][  T307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.077715][  T307] CR2: 00000000004e5ab0 CR3: 0000000005987006 CR4: 0000000000772ef0
[   20.078189][  T307] PKRU: 55555554
[   20.078450][  T307] Call Trace:
[   20.078708][  T307]  <TASK>
[ 20.078888][ T307] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.079222][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.079552][ T307] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.079911][ T307] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.080323][ T307] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.080649][ T307] netif_set_mtu (net/core/dev.c:9652) 
[ 20.080986][ T307] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.081334][ T307] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.081793][ T307] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.082054][ T307] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.082529][ T307] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.082937][ T307] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 20.083266][ T307] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.083616][ T307] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.084035][ T307] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.084368][ T307] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.084704][ T307] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.085047][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.085373][ T307] ? __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) 
[ 20.085716][ T307] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.086143][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.086471][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.086834][ T307] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.087167][ T307] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.087486][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.087821][ T307] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.088146][ T307] ? __create_object (mm/kmemleak.c:771) 
[ 20.088513][ T307] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.088862][ T307] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.089207][ T307] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.089609][ T307] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.089944][ T307] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.090282][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.090603][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.090951][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.091283][ T307] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.091607][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.091939][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.092279][ T307] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.092608][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.093179][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.093507][ T307] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.093850][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.094168][ T307] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.094524][ T307] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.094852][ T307] ? 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) 
[ 20.095176][ T307] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 20.095496][ T307] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.095827][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.096180][ T307] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.096503][ T307] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.096843][ T307] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.097179][ T307] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.097518][ T307] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.097846][ T307] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.098251][ T307] ___sys_sendmsg (net/socket.c:2670) 
[ 20.098890][ T307] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.099220][ T307] ? __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) 
[ 20.099881][ T307] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.100474][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.101047][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.101381][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.101938][ T307] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.102278][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.102610][ T307] __sys_sendmsg (net/socket.c:2700) 
[ 20.102933][ T307] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.103350][ T307] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.103756][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.104094][ T307] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.104428][ T307] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.105054][  T307] RIP: 0033:0x7f51dfab21e7
[ 20.105390][ T307] 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)
[   20.106518][  T307] RSP: 002b:00007ffef0b3fd18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.107003][  T307] RAX: ffffffffffffffda RBX: 00007ffef0b40440 RCX: 00007f51dfab21e7
[   20.107483][  T307] RDX: 0000000000000000 RSI: 00007ffef0b3fd80 RDI: 0000000000000005
[   20.107974][  T307] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.108507][  T307] R10: 000000002bff7910 R11: 0000000000000246 R12: 0000000000000004
[   20.108990][  T307] R13: 00000000686e6565 R14: 0000000000499600 R15: 0000000000000000
| [   84.411389][  T595] ------------[ cut here ]------------
| [ 84.412386][ T595] WARNING: CPU: 0 PID: 595 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) 
| [   84.413010][  T595] Modules linked in: act_gact cls_flower sch_ingress bridge stp llc 8021q vrf veth
| [   84.414201][  T595] Tainted: [W]=WARN
[   84.414447][  T595] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 84.414838][ T595] 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) 
[ 84.415161][ T595] Code: 00 00 8b 05 b7 bb 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 fa 61 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 b7 bb 3a 02    	mov    0x23abbb7(%rip),%eax        # 0x23abbbf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 fa 61 7b 00       	call   0x7b621b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   84.416270][  T595] RSP: 0018:ffffc9000111eef0 EFLAGS: 00010246
[   84.416717][  T595] RAX: 0000000000000000 RBX: ffff888004d5a000 RCX: 0000000000000001
[   84.417186][  T595] RDX: 0000000000000000 RSI: ffffffff9ba9b939 RDI: ffffffff9b2555e0
[   84.417647][  T595] RBP: ffffc9000111efe0 R08: 0000000000000000 R09: 0000000000000000
[   84.418117][  T595] R10: ffffc9000111f010 R11: ffffffff9c8a8918 R12: 1ffff92000223de2
[   84.418604][  T595] R13: 00000000000005dc R14: ffffc9000111f010 R15: ffff888004d5af08
[   84.419084][  T595] FS:  00007f5943730800(0000) GS:ffff8880918b7000(0000) knlGS:0000000000000000
[   84.419630][  T595] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.420025][  T595] CR2: 00000000004e5aa0 CR3: 000000000c640005 CR4: 0000000000772ef0
[   84.420496][  T595] PKRU: 55555554
[   84.420741][  T595] Call Trace:
[   84.420974][  T595]  <TASK>
[ 84.421136][ T595] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 84.421457][ T595] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 84.421791][ T595] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 84.422097][ T595] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 84.422485][ T595] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 84.422803][ T595] netif_set_mtu (net/core/dev.c:9652) 
[ 84.423118][ T595] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 84.423438][ T595] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 84.423876][ T595] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 84.424111][ T595] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 84.424527][ T595] br_add_if (net/bridge/br_if.c:697) bridge 
[ 84.424879][ T595] ? cycle_netdev (drivers/net/vrf.c:1055) vrf 
[ 84.425198][ T595] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 84.425516][ T595] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 84.425834][ T595] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 84.426225][ T595] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 84.426538][ T595] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 84.426849][ T595] ? __kernel_text_address (kernel/extable.c:79) 
[ 84.427169][ T595] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 84.427484][ T595] ? __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) 
[ 84.427801][ T595] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 84.428185][ T595] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 84.428506][ T595] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 84.428821][ T595] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 84.429127][ T595] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 84.429435][ T595] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 84.429751][ T595] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 84.430061][ T595] ? __create_object (mm/kmemleak.c:771) 
[ 84.430373][ T595] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 84.430689][ T595] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 84.430999][ T595] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 84.431383][ T595] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 84.431705][ T595] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 84.432023][ T595] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 84.432336][ T595] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 84.432655][ T595] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 84.432970][ T595] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 84.433272][ T595] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 84.433583][ T595] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 84.433900][ T595] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 84.434213][ T595] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 84.434527][ T595] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 84.434859][ T595] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 84.435178][ T595] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 84.435489][ T595] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 84.435824][ T595] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 84.436134][ T595] ? 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) 
[ 84.436448][ T595] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 84.436773][ T595] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 84.437091][ T595] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 84.437413][ T595] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 84.437741][ T595] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 84.438061][ T595] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 84.438376][ T595] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 84.438741][ T595] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 84.439052][ T595] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 84.439451][ T595] ___sys_sendmsg (net/socket.c:2670) 
[ 84.439764][ T595] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 84.440076][ T595] ? __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) 
[ 84.440460][ T595] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 84.440775][ T595] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 84.441088][ T595] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 84.441404][ T595] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 84.441728][ T595] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 84.442036][ T595] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 84.442352][ T595] __sys_sendmsg (net/socket.c:2700) 
[ 84.442665][ T595] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 84.443047][ T595] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 84.443371][ T595] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 84.443685][ T595] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 84.443997][ T595] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   84.444391][  T595] RIP: 0033:0x7f59438fd1e7
[ 84.444720][ T595] 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)
[   84.445867][  T595] RSP: 002b:00007ffe38969cc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   84.446338][  T595] RAX: ffffffffffffffda RBX: 00007ffe3896a3f0 RCX: 00007f59438fd1e7
[   84.446837][  T595] RDX: 0000000000000000 RSI: 00007ffe38969d30 RDI: 0000000000000005
[   84.447307][  T595] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   84.447775][  T595] R10: 000000003919d910 R11: 0000000000000246 R12: 0000000000000004


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