======================================
| [   20.168664][  T298] veth1: entered promiscuous mode
| [   20.170962][  T298] ------------[ cut here ]------------
| [ 20.171302][ T298] WARNING: CPU: 3 PID: 298 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) 
| [   20.172044][  T298] Modules linked in: bridge stp llc vrf veth
[   20.173949][  T298] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.174491][ T298] 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) 
[ 20.174820][ T298] 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
[   20.176066][  T298] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   20.176477][  T298] RAX: 0000000000000000 RBX: ffff88800bbaa000 RCX: 0000000000000001
[   20.176955][  T298] RDX: 0000000000000000 RSI: ffffffffa549b941 RDI: ffffffffa4c555e0
[   20.177451][  T298] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.178112][  T298] R10: ffffc90000587010 R11: ffffffffa62a8918 R12: 1ffff920000b0de2
[   20.178602][  T298] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff88800bbaaf08
[   20.179087][  T298] FS:  00007fdd87e0d800(0000) GS:ffff88808ee37000(0000) knlGS:0000000000000000
[   20.179637][  T298] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.180149][  T298] CR2: 00000000004e5aa8 CR3: 000000000e02f001 CR4: 0000000000772ef0
[   20.180964][  T298] PKRU: 55555554
[   20.181379][  T298] Call Trace:
[   20.181799][  T298]  <TASK>
[ 20.182078][ T298] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.182641][ T298] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.183173][ T298] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.183740][ T298] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.184216][ T298] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.184558][ T298] netif_set_mtu (net/core/dev.c:9652) 
[ 20.184907][ T298] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.185226][ T298] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.185672][ T298] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.185931][ T298] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.186366][ T298] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.186720][ T298] do_set_master (net/core/rtnetlink.c:2948) 
[ 20.187069][ T298] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.187400][ T298] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.187786][ T298] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.188134][ T298] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.188454][ T298] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.188776][ T298] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.189267][ T298] ? __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) 
[ 20.189599][ T298] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.189990][ T298] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.190337][ T298] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.190641][ T298] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.190962][ T298] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.191276][ T298] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.191594][ T298] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.191930][ T298] ? __create_object (mm/kmemleak.c:771) 
[ 20.192249][ T298] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.192564][ T298] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.192874][ T298] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.193276][ T298] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.193608][ T298] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.193934][ T298] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.194241][ T298] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.194572][ T298] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.194913][ T298] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.195220][ T298] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.195537][ T298] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.195853][ T298] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.196213][ T298] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.196575][ T298] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.196912][ T298] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.197497][ T298] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.197814][ T298] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.198147][ T298] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.198478][ T298] ? 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) 
[ 20.198798][ T298] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.199146][ T298] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.199486][ T298] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.199800][ T298] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.200142][ T298] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.200467][ T298] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.200779][ T298] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.201104][ T298] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.201426][ T298] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.201821][ T298] ___sys_sendmsg (net/socket.c:2670) 
[ 20.202138][ T298] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.202456][ T298] ? __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) 
[ 20.202838][ T298] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.203167][ T298] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.203493][ T298] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.203806][ T298] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.204134][ T298] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.204466][ T298] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.204781][ T298] __sys_sendmsg (net/socket.c:2700) 
[ 20.205219][ T298] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.205790][ T298] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.206360][ T298] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.206894][ T298] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.207424][ T298] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.208544][  T298] RIP: 0033:0x7fdd87fda1e7
[ 20.209104][ T298] 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)
[   20.211142][  T298] RSP: 002b:00007ffcf5ea1828 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.212447][  T298] RAX: ffffffffffffffda RBX: 00007ffcf5ea1f50 RCX: 00007fdd87fda1e7
[   20.213297][  T298] RDX: 0000000000000000 RSI: 00007ffcf5ea1890 RDI: 0000000000000005
[   20.214139][  T298] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.215447][  T298] R10: 0000000005e71910 R11: 0000000000000246 R12: 0000000000000004
[   20.216301][  T298] R13: 00000000686e3886 R14: 0000000000499600 R15: 0000000000000000
| [   20.344320][  T300] ------------[ cut here ]------------
| [ 20.344635][ T300] WARNING: CPU: 3 PID: 300 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) 
| [   20.345288][  T300] Modules linked in: bridge stp llc vrf veth
| [   20.346383][  T300] Tainted: [W]=WARN
[   20.346633][  T300] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.347042][ T300] 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) 
[ 20.347388][ T300] 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
[   20.348548][  T300] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   20.348957][  T300] RAX: 0000000000000000 RBX: ffff88800bbaa000 RCX: 0000000000000001
[   20.349450][  T300] RDX: 0000000000000000 RSI: ffffffffa549b941 RDI: ffffffffa4c555e0
[   20.349933][  T300] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.350446][  T300] R10: ffffc90000587010 R11: ffffffffa62a8918 R12: 1ffff920000b0de2
[   20.350933][  T300] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff88800bbaaf08
[   20.351425][  T300] FS:  00007f7fe98b9800(0000) GS:ffff88808ee37000(0000) knlGS:0000000000000000
[   20.351994][  T300] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.352407][  T300] CR2: 00000000004e5ab0 CR3: 000000000be03004 CR4: 0000000000772ef0
[   20.352891][  T300] PKRU: 55555554
[   20.353133][  T300] Call Trace:
[   20.353384][  T300]  <TASK>
[ 20.353554][ T300] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.353883][ T300] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.354215][ T300] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.354543][ T300] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.354947][ T300] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.355276][ T300] netif_set_mtu (net/core/dev.c:9652) 
[ 20.355609][ T300] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.355943][ T300] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.356408][ T300] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.356658][ T300] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.357102][ T300] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.357481][ T300] do_set_master (net/core/rtnetlink.c:2948) 
[ 20.357813][ T300] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.358139][ T300] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.358558][ T300] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.358883][ T300] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.359216][ T300] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.359549][ T300] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.359877][ T300] ? __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) 
[ 20.360213][ T300] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.360618][ T300] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.360945][ T300] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.361267][ T300] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.361600][ T300] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.361923][ T300] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.362246][ T300] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.362572][ T300] ? __create_object (mm/kmemleak.c:771) 
[ 20.362893][ T300] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.363217][ T300] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.363546][ T300] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.363944][ T300] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.364276][ T300] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.364609][ T300] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.364924][ T300] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.365238][ T300] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.365551][ T300] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.365855][ T300] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.366167][ T300] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.366481][ T300] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.366794][ T300] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.367111][ T300] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.367453][ T300] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.367777][ T300] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.368096][ T300] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.368441][ T300] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.368764][ T300] ? 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) 
[ 20.369075][ T300] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.369414][ T300] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.369725][ T300] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.370042][ T300] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.370434][ T300] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.370739][ T300] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.371049][ T300] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.371368][ T300] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.371672][ T300] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.372061][ T300] ___sys_sendmsg (net/socket.c:2670) 
[ 20.372370][ T300] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.372675][ T300] ? __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) 
[ 20.373054][ T300] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.373404][ T300] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.373718][ T300] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.374029][ T300] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.374340][ T300] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.374670][ T300] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.375006][ T300] __sys_sendmsg (net/socket.c:2700) 
[ 20.375326][ T300] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.375714][ T300] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.376036][ T300] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.376357][ T300] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.376662][ T300] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.377042][  T300] RIP: 0033:0x7f7fe9a861e7
[ 20.377401][ T300] 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)
[   20.378550][  T300] RSP: 002b:00007ffd8770b9a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.379012][  T300] RAX: ffffffffffffffda RBX: 00007ffd8770c0d0 RCX: 00007f7fe9a861e7
[   20.379524][  T300] RDX: 0000000000000000 RSI: 00007ffd8770ba10 RDI: 0000000000000005
[   20.379992][  T300] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.380540][  T300] R10: 0000000039750910 R11: 0000000000000246 R12: 0000000000000004


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