======================================
| [   19.885656][  T314] ip_gre: GRE over IPv4 tunneling driver
| [   19.949444][  T313] ------------[ cut here ]------------
| [ 19.949892][ T313] WARNING: CPU: 0 PID: 313 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) 
| [   19.950667][  T313] Modules linked in: ip_gre gre sch_ingress vrf veth
[   19.951701][  T313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.952093][ T313] 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) 
[ 19.952435][ T313] 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
[   19.953558][  T313] RSP: 0018:ffffc900004d7000 EFLAGS: 00010246
[   19.953982][  T313] RAX: 0000000000000000 RBX: ffff88800c091000 RCX: 0000000000000001
[   19.954456][  T313] RDX: 0000000000000000 RSI: fffffffface9b941 RDI: ffffffffac6555e0
[   19.954927][  T313] RBP: ffffc900004d70e8 R08: ffff88800c091218 R09: 0000000000000000
[   19.955395][  T313] R10: ffffc900004d7118 R11: ffffffffad379160 R12: 1ffff9200009ae04
[   19.956904][  T313] R13: 00000000000005b6 R14: ffffc900004d7118 R15: ffff88800c091218
[   19.957385][  T313] FS:  00007f2b43464800(0000) GS:ffff8880872b7000(0000) knlGS:0000000000000000
[   19.957945][  T313] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.958332][  T313] CR2: 00007f771810c3b8 CR3: 000000000e0d9005 CR4: 0000000000772ef0
[   19.958802][  T313] PKRU: 55555554
[   19.959045][  T313] Call Trace:
[   19.959283][  T313]  <TASK>
[ 19.959462][ T313] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 19.959873][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.960198][ T313] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 19.960514][ T313] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 19.960841][ T313] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.961163][ T313] netif_set_mtu (net/core/dev.c:9652) 
[ 19.961480][ T313] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 19.961812][ T313] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 19.962123][ T313] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 19.962357][ T313] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 19.962685][ T313] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 19.962996][ T313] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 19.963317][ T313] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 19.963701][ T313] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 19.964174][ T313] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 19.964489][ T313] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 19.964799][ T313] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 19.965117][ T313] ? __dev_get_by_name (net/core/dev.c:865) 
[ 19.965420][ T313] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 19.965765][ T313] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 19.966076][ T313] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 19.966378][ T313] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 19.966695][ T313] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 19.967020][ T313] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 19.967328][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.967662][ T313] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 19.967962][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 19.968270][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 19.968602][ T313] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 19.968907][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.969216][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.969561][ T313] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 19.969874][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 19.970181][ T313] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 19.970505][ T313] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 19.970810][ T313] ? 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) 
[ 19.971116][ T313] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 19.971431][ T313] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 19.972453][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.972766][ T313] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 19.973079][ T313] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 19.973614][ T313] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 19.976379][ T313] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 19.976939][ T313] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 19.977246][ T313] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 19.977652][ T313] ___sys_sendmsg (net/socket.c:2670) 
[ 19.977959][ T313] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 19.978496][ T313] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 19.979036][ T313] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 19.979803][ T313] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 19.980126][ T313] ? __handle_mm_fault (mm/memory.c:6212) 
[ 19.980729][ T313] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 19.981040][ T313] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 19.981590][ T313] __sys_sendmsg (net/socket.c:2700) 
[ 19.981897][ T313] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 19.982200][ T313] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 19.982747][ T313] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:142 ./include/linux/mmap_lock.h:237 arch/x86/mm/fault.c:1338) 
[ 19.983057][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.983600][ T313] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.983913][ T313] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.984296][  T313] RIP: 0033:0x7f2b436311e7
[ 19.984644][ T313] Code: Unable to access opcode bytes at 0x7f2b436311bd.

Code starting with the faulting instruction
===========================================
[   19.985049][  T313] RSP: 002b:00007fffa65e5248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.985533][  T313] RAX: ffffffffffffffda RBX: 00007fffa65e5970 RCX: 00007f2b436311e7
[   19.986454][  T313] RDX: 0000000000000000 RSI: 00007fffa65e52b0 RDI: 0000000000000005
[   19.986924][  T313] RBP: 0000000000000004 R08: 00000000000000b0 R09: 0000000000000000
[   19.987396][  T313] R10: 00007f2b435296f8 R11: 0000000000000246 R12: 00007fffa65e5990
[   19.988103][  T313] R13: 00000000686e46a3 R14: 0000000000499600 R15: 00007fffa65e539c
| [   22.787415][  T340] ------------[ cut here ]------------
| [ 22.788103][ T340] WARNING: CPU: 2 PID: 340 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) 
| [   22.788784][  T340] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   22.790337][  T340] Tainted: [W]=WARN
[   22.790641][  T340] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.791062][ T340] 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) 
[ 22.791412][ T340] 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
[   22.792584][  T340] RSP: 0018:ffffc900004b6ef0 EFLAGS: 00010246
[   22.793193][  T340] RAX: 0000000000000000 RBX: ffff88800c242000 RCX: 0000000000000001
[   22.793702][  T340] RDX: 0000000000000000 RSI: fffffffface9b941 RDI: ffffffffac6555e0
[   22.794203][  T340] RBP: ffffc900004b6fe0 R08: 0000000000000000 R09: 0000000000000000
[   22.794719][  T340] R10: ffffc900004b7010 R11: ffffffffadca8918 R12: 1ffff92000096de2
[   22.795219][  T340] R13: 00000000000005dc R14: ffffc900004b7010 R15: ffff88800c242f08
[   22.795738][  T340] FS:  00007fd839526800(0000) GS:ffff8880873b7000(0000) knlGS:0000000000000000
[   22.796315][  T340] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   22.796743][  T340] CR2: 00000000004e5aa8 CR3: 000000000c280004 CR4: 0000000000772ef0
[   22.797234][  T340] PKRU: 55555554
[   22.797503][  T340] Call Trace:
[   22.797756][  T340]  <TASK>
[ 22.797944][ T340] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 22.798279][ T340] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.798650][ T340] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 22.798990][ T340] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 22.799436][ T340] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 22.799776][ T340] netif_set_mtu (net/core/dev.c:9652) 
[ 22.800112][ T340] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 22.800466][ T340] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 22.800921][ T340] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 22.801180][ T340] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 22.801638][ T340] br_add_if (net/bridge/br_if.c:697) bridge 
[ 22.802013][ T340] do_set_master (net/core/rtnetlink.c:2948) 
[ 22.802381][ T340] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 22.802763][ T340] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 22.803193][ T340] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 22.803552][ T340] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 22.803886][ T340] ? __kernel_text_address (kernel/extable.c:79) 
[ 22.804230][ T340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.804581][ T340] ? __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) 
[ 22.804917][ T340] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 22.805331][ T340] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.805678][ T340] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.806009][ T340] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 22.806346][ T340] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 22.806701][ T340] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.807046][ T340] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 22.807378][ T340] ? __create_object (mm/kmemleak.c:771) 
[ 22.807734][ T340] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 22.808071][ T340] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 22.808415][ T340] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 22.808851][ T340] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 22.809193][ T340] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 22.809556][ T340] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 22.809893][ T340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.810234][ T340] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.810590][ T340] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 22.810935][ T340] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 22.811269][ T340] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 22.811617][ T340] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 22.811952][ T340] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 22.812292][ T340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.812641][ T340] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 22.812988][ T340] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 22.813323][ T340] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 22.813683][ T340] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 22.814022][ T340] ? 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) 
[ 22.814362][ T340] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 22.814720][ T340] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 22.815055][ T340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.815397][ T340] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 22.815746][ T340] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 22.816082][ T340] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 22.816441][ T340] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 22.816781][ T340] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 22.817115][ T340] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 22.817553][ T340] ___sys_sendmsg (net/socket.c:2670) 
[ 22.817886][ T340] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 22.818221][ T340] ? __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) 
[ 22.818658][ T340] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 22.819004][ T340] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.819345][ T340] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.819707][ T340] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.820044][ T340] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 22.820380][ T340] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 22.820738][ T340] __sys_sendmsg (net/socket.c:2700) 
[ 22.821072][ T340] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 22.821496][ T340] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 22.821844][ T340] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.822183][ T340] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 22.822544][ T340] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   22.822968][  T340] RIP: 0033:0x7fd8396f31e7
[ 22.823315][ T340] 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)
[   22.824495][  T340] RSP: 002b:00007fffc9c81918 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   22.824994][  T340] RAX: ffffffffffffffda RBX: 00007fffc9c82040 RCX: 00007fd8396f31e7
[   22.825501][  T340] RDX: 0000000000000000 RSI: 00007fffc9c81980 RDI: 0000000000000005
[   22.825992][  T340] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   22.826510][  T340] R10: 000000003da35910 R11: 0000000000000246 R12: 0000000000000004
[   22.827010][  T340] R13: 00000000686e46a6 R14: 0000000000499600 R15: 0000000000000000
| [   23.055820][  T342] ------------[ cut here ]------------
| [ 23.056172][ T342] WARNING: CPU: 3 PID: 342 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) 
| [   23.056833][  T342] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   23.058241][  T342] Tainted: [W]=WARN
[   23.058498][  T342] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.058903][ T342] 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) 
[ 23.059235][ T342] 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
[   23.060400][  T342] RSP: 0018:ffffc900004c6ef0 EFLAGS: 00010246
[   23.060820][  T342] RAX: 0000000000000000 RBX: ffff88800c242000 RCX: 0000000000000001
[   23.061301][  T342] RDX: 0000000000000000 RSI: fffffffface9b941 RDI: ffffffffac6555e0
[   23.061788][  T342] RBP: ffffc900004c6fe0 R08: 0000000000000000 R09: 0000000000000000
[   23.062272][  T342] R10: ffffc900004c7010 R11: ffffffffadca8918 R12: 1ffff92000098de2
[   23.062767][  T342] R13: 00000000000005dc R14: ffffc900004c7010 R15: ffff88800c242f08
[   23.063247][  T342] FS:  00007fc651c4b800(0000) GS:ffff888087437000(0000) knlGS:0000000000000000
[   23.063819][  T342] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.064226][  T342] CR2: 0000563afebf9dec CR3: 000000000ee7b003 CR4: 0000000000772ef0
[   23.064727][  T342] PKRU: 55555554
[   23.064971][  T342] Call Trace:
[   23.065213][  T342]  <TASK>
[ 23.065379][ T342] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.065716][ T342] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.066045][ T342] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 23.066369][ T342] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 23.066780][ T342] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.067109][ T342] netif_set_mtu (net/core/dev.c:9652) 
[ 23.067449][ T342] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.067787][ T342] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 23.068229][ T342] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.068485][ T342] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 23.068921][ T342] br_add_if (net/bridge/br_if.c:697) bridge 
[ 23.069283][ T342] do_set_master (net/core/rtnetlink.c:2948) 
[ 23.069640][ T342] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 23.069968][ T342] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 23.070375][ T342] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 23.070706][ T342] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 23.071030][ T342] ? __kernel_text_address (kernel/extable.c:79) 
[ 23.071356][ T342] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.071689][ T342] ? __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) 
[ 23.072016][ T342] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 23.072413][ T342] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.072746][ T342] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.073068][ T342] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 23.073387][ T342] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 23.073717][ T342] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.074039][ T342] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.074361][ T342] ? __create_object (mm/kmemleak.c:771) 
[ 23.074690][ T342] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 23.075011][ T342] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 23.075331][ T342] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.075739][ T342] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 23.076068][ T342] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.076395][ T342] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.076725][ T342] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.077057][ T342] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.077376][ T342] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.077702][ T342] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.078027][ T342] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.078355][ T342] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.078689][ T342] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.079014][ T342] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.079339][ T342] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.079683][ T342] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.080004][ T342] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.080337][ T342] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.080664][ T342] ? 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) 
[ 23.080989][ T342] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.081312][ T342] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.081642][ T342] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.081971][ T342] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.082297][ T342] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.082626][ T342] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.082955][ T342] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.083279][ T342] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.083622][ T342] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.084032][ T342] ___sys_sendmsg (net/socket.c:2670) 
[ 23.084355][ T342] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 23.084683][ T342] ? __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) 
[ 23.085079][ T342] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.085405][ T342] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.085736][ T342] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.086065][ T342] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.086393][ T342] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 23.086730][ T342] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.087060][ T342] __sys_sendmsg (net/socket.c:2700) 
[ 23.087380][ T342] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 23.087789][ T342] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.088122][ T342] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.088456][ T342] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.088782][ T342] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.089184][  T342] RIP: 0033:0x7fc651e181e7
[ 23.089535][ T342] 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)
[   23.090691][  T342] RSP: 002b:00007ffd707efc28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.091178][  T342] RAX: ffffffffffffffda RBX: 00007ffd707f0350 RCX: 00007fc651e181e7
[   23.091670][  T342] RDX: 0000000000000000 RSI: 00007ffd707efc90 RDI: 0000000000000005
[   23.092151][  T342] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   23.092638][  T342] R10: 00000000098fb910 R11: 0000000000000246 R12: 0000000000000004
[   23.093117][  T342] R13: 00000000686e46a6 R14: 0000000000499600 R15: 0000000000000000
| [   23.495903][  T345] ------------[ cut here ]------------
| [ 23.496305][ T345] WARNING: CPU: 2 PID: 345 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) 
| [   23.496990][  T345] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   23.498467][  T345] Tainted: [W]=WARN
[   23.498733][  T345] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.499163][ T345] 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) 
[ 23.499532][ T345] 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
[   23.500734][  T345] RSP: 0018:ffffc900005b7000 EFLAGS: 00010246
[   23.501156][  T345] RAX: 0000000000000000 RBX: ffff88800e3fc000 RCX: 0000000000000001
[   23.501663][  T345] RDX: 0000000000000000 RSI: fffffffface9b941 RDI: ffffffffac6555e0
[   23.502162][  T345] RBP: ffffc900005b70e8 R08: ffff88800e3fc218 R09: 0000000000000000
[   23.502665][  T345] R10: ffffc900005b7118 R11: ffffffffad379160 R12: 1ffff920000b6e04
[   23.503162][  T345] R13: 00000000000005b6 R14: ffffc900005b7118 R15: ffff88800e3fc218
[   23.503671][  T345] FS:  00007f16fcc20800(0000) GS:ffff8880873b7000(0000) knlGS:0000000000000000
[   23.504247][  T345] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.504674][  T345] CR2: 00007f16fcd20130 CR3: 0000000009f52006 CR4: 0000000000772ef0
[   23.505176][  T345] PKRU: 55555554
[   23.505442][  T345] Call Trace:
[   23.505699][  T345]  <TASK>
[ 23.505876][ T345] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 23.506290][ T345] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.506650][ T345] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.507007][ T345] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 23.507353][ T345] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.507714][ T345] netif_set_mtu (net/core/dev.c:9652) 
[ 23.508050][ T345] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.508399][ T345] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 23.508749][ T345] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.509007][ T345] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 23.509347][ T345] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 23.509715][ T345] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 23.510056][ T345] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 23.510485][ T345] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 23.510829][ T345] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 23.511175][ T345] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 23.511530][ T345] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 23.511867][ T345] ? __dev_get_by_name (net/core/dev.c:865) 
[ 23.512204][ T345] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 23.512552][ T345] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 23.512907][ T345] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.513239][ T345] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 23.513596][ T345] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 23.513945][ T345] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.514285][ T345] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.514663][ T345] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.515005][ T345] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.515350][ T345] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.515699][ T345] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.516111][ T345] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.516525][ T345] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.516874][ T345] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.517212][ T345] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.517561][ T345] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.517930][ T345] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.518275][ T345] ? 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) 
[ 23.518627][ T345] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.518967][ T345] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.519302][ T345] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.519667][ T345] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.520011][ T345] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.520349][ T345] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.520708][ T345] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.521052][ T345] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.521389][ T345] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.521826][ T345] ___sys_sendmsg (net/socket.c:2670) 
[ 23.522167][ T345] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.522510][ T345] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 23.522849][ T345] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 23.523186][ T345] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 23.523559][ T345] ? __handle_mm_fault (mm/memory.c:6212) 
[ 23.524115][ T345] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 23.524680][ T345] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 23.525270][ T345] __sys_sendmsg (net/socket.c:2700) 
[ 23.525831][ T345] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.526169][ T345] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 23.526531][ T345] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:142 ./include/linux/mmap_lock.h:237 arch/x86/mm/fault.c:1338) 
[ 23.526868][ T345] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.527203][ T345] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.527547][ T345] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.527953][  T345] RIP: 0033:0x7f16fcded1e7
[ 23.528300][ T345] 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)
[   23.529476][  T345] RSP: 002b:00007ffcd0df30c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.530199][  T345] RAX: ffffffffffffffda RBX: 00007ffcd0df37f0 RCX: 00007f16fcded1e7
[   23.530698][  T345] RDX: 0000000000000000 RSI: 00007ffcd0df3130 RDI: 0000000000000005
[   23.531190][  T345] RBP: 0000000000000008 R08: 00000000000000ac R09: 0000000000000000
[   23.531685][  T345] R10: 00007f16fcce56f8 R11: 0000000000000246 R12: 00007ffcd0df3810


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