======================================
| [   19.950063][  T303] veth1: entered promiscuous mode
| [   19.953915][  T303] ------------[ cut here ]------------
| [ 19.954761][ T303] WARNING: CPU: 2 PID: 303 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) 
| [   19.955906][  T303] Modules linked in: bridge stp llc vrf veth
[   19.959614][  T303] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.960308][ T303] 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) 
[ 19.960881][ T303] 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
[   19.962894][  T303] RSP: 0018:ffffc900005f6ef0 EFLAGS: 00010246
[   19.963672][  T303] RAX: 0000000000000000 RBX: ffff8880127ba000 RCX: 0000000000000001
[   19.964544][  T303] RDX: 0000000000000000 RSI: ffffffff94a9b939 RDI: ffffffff942555e0
[   19.965398][  T303] RBP: ffffc900005f6fe0 R08: 0000000000000000 R09: 0000000000000000
[   19.966278][  T303] R10: ffffc900005f7010 R11: ffffffff958a8918 R12: 1ffff920000bede2
[   19.967159][  T303] R13: 00000000000005dc R14: ffffc900005f7010 R15: ffff8880127baf08
[   19.968005][  T303] FS:  00007f396fc00800(0000) GS:ffff88809f7b7000(0000) knlGS:0000000000000000
[   19.969011][  T303] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.969745][  T303] CR2: 00000000004e5aa8 CR3: 0000000009a4b002 CR4: 0000000000772ef0
[   19.970635][  T303] PKRU: 55555554
[   19.971071][  T303] Call Trace:
[   19.971531][  T303]  <TASK>
[ 19.971844][ T303] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 19.972423][ T303] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.973040][ T303] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 19.973640][ T303] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.974350][ T303] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.974953][ T303] netif_set_mtu (net/core/dev.c:9652) 
[ 19.975544][ T303] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 19.976144][ T303] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 19.976936][ T303] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 19.977384][ T303] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 19.978190][ T303] br_add_if (net/bridge/br_if.c:697) bridge 
[ 19.978877][ T303] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 19.979488][ T303] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 19.980063][ T303] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 19.980811][ T303] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 19.981389][ T303] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 19.981977][ T303] ? __kernel_text_address (kernel/extable.c:79) 
[ 19.982573][ T303] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.983156][ T303] ? __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) 
[ 19.983748][ T303] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 19.984419][ T303] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.985028][ T303] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.985619][ T303] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 19.986190][ T303] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 19.986789][ T303] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.987351][ T303] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 19.987955][ T303] ? __create_object (mm/kmemleak.c:771) 
[ 19.988498][ T303] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 19.989043][ T303] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 19.989617][ T303] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.990317][ T303] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 19.990928][ T303] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 19.991550][ T303] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.992100][ T303] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.992713][ T303] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.993289][ T303] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 19.993879][ T303] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.994465][ T303] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.995042][ T303] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 19.995640][ T303] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.996221][ T303] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.996830][ T303] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 19.997407][ T303] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.998003][ T303] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 19.998621][ T303] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 19.999691][ T303] ? 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) 
[ 20.000257][ T303] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 20.000861][ T303] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.001722][ T303] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.002071][ T303] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.002405][ T303] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.002740][ T303] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.003299][ T303] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.003640][ T303] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.003962][ T303] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.004413][ T303] ___sys_sendmsg (net/socket.c:2670) 
[ 20.004745][ T303] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.005293][ T303] ? __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) 
[ 20.005927][ T303] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.006253][ T303] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.006587][ T303] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.006922][ T303] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.007476][ T303] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.007804][ T303] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.008131][ T303] __sys_sendmsg (net/socket.c:2700) 
[ 20.008463][ T303] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.008881][ T303] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.009220][ T303] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.009560][ T303] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.009909][ T303] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.010304][  T303] RIP: 0033:0x7f396fdcd1e7
[ 20.011130][ T303] 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)
[   20.012564][  T303] RSP: 002b:00007fff1fc325b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.013066][  T303] RAX: ffffffffffffffda RBX: 00007fff1fc32ce0 RCX: 00007f396fdcd1e7
[   20.013553][  T303] RDX: 0000000000000000 RSI: 00007fff1fc32620 RDI: 0000000000000005
[   20.014069][  T303] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.014569][  T303] R10: 0000000004a16910 R11: 0000000000000246 R12: 0000000000000004
[   20.015061][  T303] R13: 00000000686e6263 R14: 0000000000499600 R15: 0000000000000000
| [   20.158237][  T304] ------------[ cut here ]------------
| [ 20.158600][ T304] WARNING: CPU: 3 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) 
| [   20.159249][  T304] Modules linked in: bridge stp llc vrf veth
| [   20.160331][  T304] Tainted: [W]=WARN
[   20.160604][  T304] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.161006][ 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) 
[ 20.161362][ T304] 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
[   20.162515][  T304] RSP: 0018:ffffc900006a6ef0 EFLAGS: 00010246
[   20.162920][  T304] RAX: 0000000000000000 RBX: ffff8880127ba000 RCX: 0000000000000001
[   20.163403][  T304] RDX: 0000000000000000 RSI: ffffffff94a9b939 RDI: ffffffff942555e0
[   20.163889][  T304] RBP: ffffc900006a6fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.164373][  T304] R10: ffffc900006a7010 R11: ffffffff958a8918 R12: 1ffff920000d4de2
[   20.164861][  T304] R13: 00000000000005dc R14: ffffc900006a7010 R15: ffff8880127baf08
[   20.165346][  T304] FS:  00007fb8fc89b800(0000) GS:ffff88809f837000(0000) knlGS:0000000000000000
[   20.165915][  T304] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.166321][  T304] CR2: 00000000004e5ab0 CR3: 000000001242b003 CR4: 0000000000772ef0
[   20.166814][  T304] PKRU: 55555554
[   20.167055][  T304] Call Trace:
[   20.167295][  T304]  <TASK>
[ 20.167475][ T304] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.167802][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.168131][ T304] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.168459][ T304] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.168865][ T304] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.169187][ T304] netif_set_mtu (net/core/dev.c:9652) 
[ 20.169518][ T304] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.169852][ T304] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.170300][ T304] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.170558][ T304] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.170999][ T304] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.171419][ T304] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 20.171768][ T304] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.172102][ T304] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.172528][ T304] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.172856][ T304] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.173181][ T304] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.173521][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.173849][ 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) 
[ 20.174175][ T304] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.174589][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.174918][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.175238][ T304] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.175580][ T304] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.175904][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.176230][ T304] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.176559][ T304] ? __create_object (mm/kmemleak.c:771) 
[ 20.176888][ T304] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.177210][ T304] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.177548][ T304] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.177950][ T304] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.178282][ T304] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.178617][ T304] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.178939][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.179266][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.179598][ T304] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.179922][ T304] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.180247][ T304] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.180578][ T304] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.180905][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.181233][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.181591][ T304] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.181916][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.182241][ T304] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.182588][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.182909][ 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) 
[ 20.183233][ T304] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 20.183557][ T304] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.183863][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.184173][ T304] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.184496][ T304] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.184804][ T304] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.185118][ T304] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.185425][ T304] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.185737][ T304] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.186129][ T304] ___sys_sendmsg (net/socket.c:2670) 
[ 20.186431][ T304] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.186743][ 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) 
[ 20.187131][ T304] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.187439][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.187762][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.188072][ T304] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.188376][ T304] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.188689][ T304] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.189004][ T304] __sys_sendmsg (net/socket.c:2700) 
[ 20.189311][ T304] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.189696][ T304] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.190017][ T304] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.190341][ T304] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.190673][ T304] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.191066][  T304] RIP: 0033:0x7fb8fca681e7
[ 20.191392][ 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)
[   20.192513][  T304] RSP: 002b:00007fffc01daa48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.192980][  T304] RAX: ffffffffffffffda RBX: 00007fffc01db170 RCX: 00007fb8fca681e7
[   20.193466][  T304] RDX: 0000000000000000 RSI: 00007fffc01daab0 RDI: 0000000000000005
[   20.193931][  T304] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.194391][  T304] R10: 0000000002bb4910 R11: 0000000000000246 R12: 0000000000000004


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