======================================
| [   19.961066][  T314] ip_gre: GRE over IPv4 tunneling driver
| [   20.027248][  T313] ------------[ cut here ]------------
| [ 20.027706][ T313] WARNING: CPU: 1 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) 
| [   20.028555][  T313] Modules linked in: ip_gre gre sch_ingress vrf veth
[   20.029754][  T313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.030312][ 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) 
[ 20.030905][ 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
[   20.032116][  T313] RSP: 0018:ffffc900004e7000 EFLAGS: 00010246
[   20.032516][  T313] RAX: 0000000000000000 RBX: ffff888004dcc000 RCX: 0000000000000001
[   20.032969][  T313] RDX: 0000000000000000 RSI: ffffffff8fe9b941 RDI: ffffffff8f6555e0
[   20.033443][  T313] RBP: ffffc900004e70e8 R08: ffff888004dcc218 R09: 0000000000000000
[   20.034070][  T313] R10: ffffc900004e7118 R11: ffffffff90379160 R12: 1ffff9200009ce04
[   20.034539][  T313] R13: 00000000000005b6 R14: ffffc900004e7118 R15: ffff888004dcc218
[   20.034991][  T313] FS:  00007fad831f7800(0000) GS:ffff8880a4337000(0000) knlGS:0000000000000000
[   20.035525][  T313] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.035913][  T313] CR2: 00005625c675f0f8 CR3: 000000000a830005 CR4: 0000000000772ef0
[   20.036382][  T313] PKRU: 55555554
[   20.036610][  T313] Call Trace:
[   20.036837][  T313]  <TASK>
[ 20.036993][ T313] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 20.037379][ T313] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.037682][ T313] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.037992][ T313] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 20.038294][ T313] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.038608][ T313] netif_set_mtu (net/core/dev.c:9652) 
[ 20.038917][ T313] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.039230][ T313] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 20.039541][ T313] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.039769][ T313] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 20.040075][ T313] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 20.040390][ T313] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 20.040698][ T313] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 20.041077][ T313] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 20.041432][ T313] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 20.041741][ T313] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 20.042063][ T313] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 20.042367][ T313] ? __dev_get_by_name (net/core/dev.c:865) 
[ 20.042669][ T313] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 20.042971][ T313] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 20.043282][ T313] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.043610][ T313] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 20.043918][ T313] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 20.044235][ T313] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.044550][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.044861][ T313] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.045158][ T313] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.045470][ T313] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.045777][ T313] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.046083][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.046397][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.046706][ T313] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.047006][ T313] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.047308][ T313] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.047630][ T313] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.047942][ 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) 
[ 20.048252][ T313] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.048567][ T313] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.048868][ T313] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.049175][ T313] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.049486][ T313] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.049788][ T313] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.050106][ T313] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.050419][ T313] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.050745][ T313] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.051136][ T313] ___sys_sendmsg (net/socket.c:2670) 
[ 20.051446][ T313] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.051747][ T313] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 20.052075][ T313] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 20.052387][ T313] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 20.052694][ T313] ? __handle_mm_fault (mm/memory.c:6212) 
[ 20.052994][ T313] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 20.053294][ T313] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 20.053638][ T313] __sys_sendmsg (net/socket.c:2700) 
[ 20.053941][ T313] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.054251][ 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) 
[ 20.054567][ 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) 
[ 20.054871][ T313] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.055175][ T313] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.055485][ T313] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.055856][  T313] RIP: 0033:0x7fad833c41e7
[ 20.056188][ T313] Code: Unable to access opcode bytes at 0x7fad833c41bd.

Code starting with the faulting instruction
===========================================
[   20.056599][  T313] RSP: 002b:00007ffccc80e6f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.057057][  T313] RAX: ffffffffffffffda RBX: 00007ffccc80ee20 RCX: 00007fad833c41e7
[   20.057525][  T313] RDX: 0000000000000000 RSI: 00007ffccc80e760 RDI: 0000000000000005
[   20.057980][  T313] RBP: 0000000000000004 R08: 00000000000000b0 R09: 0000000000000000
[   20.058447][  T313] R10: 00007fad832bc6f8 R11: 0000000000000246 R12: 00007ffccc80ee40
[   20.058907][  T313] R13: 00000000686e3a60 R14: 0000000000499600 R15: 00007ffccc80e84c
| [   22.887703][  T341] ------------[ cut here ]------------
| [ 22.888069][ T341] WARNING: CPU: 0 PID: 341 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) 
| [   22.888683][  T341] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   22.890096][  T341] Tainted: [W]=WARN
[   22.890346][  T341] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.890732][ T341] 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) 
[ 22.891047][ T341] 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
[   22.892363][  T341] RSP: 0018:ffffc900004d6ef0 EFLAGS: 00010246
[   22.892786][  T341] RAX: 0000000000000000 RBX: ffff888009b52000 RCX: 0000000000000001
[   22.893243][  T341] RDX: 0000000000000000 RSI: ffffffff8fe9b941 RDI: ffffffff8f6555e0
[   22.893769][  T341] RBP: ffffc900004d6fe0 R08: 0000000000000000 R09: 0000000000000000
[   22.894226][  T341] R10: ffffc900004d7010 R11: ffffffff90ca8918 R12: 1ffff9200009ade2
[   22.894694][  T341] R13: 00000000000005dc R14: ffffc900004d7010 R15: ffff888009b52f08
[   22.895159][  T341] FS:  00007ff77c096800(0000) GS:ffff8880a42b7000(0000) knlGS:0000000000000000
[   22.895701][  T341] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   22.896085][  T341] CR2: 00000000004e5aa8 CR3: 000000000a1a7006 CR4: 0000000000772ef0
[   22.896553][  T341] PKRU: 55555554
[   22.896785][  T341] Call Trace:
[   22.897022][  T341]  <TASK>
[ 22.897180][ T341] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 22.897691][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.898004][ T341] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 22.898311][ T341] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 22.898700][ T341] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 22.899009][ T341] netif_set_mtu (net/core/dev.c:9652) 
[ 22.899316][ T341] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 22.899651][ T341] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 22.900075][ T341] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 22.900308][ T341] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 22.900730][ T341] br_add_if (net/bridge/br_if.c:697) bridge 
[ 22.901077][ T341] do_set_master (net/core/rtnetlink.c:2948) 
[ 22.901397][ T341] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 22.901715][ T341] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 22.902101][ T341] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 22.902413][ T341] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 22.902720][ T341] ? __kernel_text_address (kernel/extable.c:79) 
[ 22.903029][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.903350][ T341] ? __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) 
[ 22.903666][ T341] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 22.904050][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.904365][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.904668][ T341] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 22.905029][ T341] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 22.905350][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.905655][ T341] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 22.905958][ T341] ? __create_object (mm/kmemleak.c:771) 
[ 22.906268][ T341] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 22.906589][ T341] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 22.906894][ T341] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 22.907274][ T341] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 22.907596][ T341] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 22.907906][ T341] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 22.908209][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.908528][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.908838][ T341] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 22.909141][ T341] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 22.909459][ T341] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 22.909762][ T341] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 22.910069][ T341] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 22.910385][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.910695][ T341] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 22.911001][ T341] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 22.911311][ T341] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 22.911638][ T341] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 22.911944][ T341] ? 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) 
[ 22.912248][ T341] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 22.912564][ T341] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 22.912868][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.913176][ T341] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 22.913507][ T341] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 22.913812][ T341] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 22.914125][ T341] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 22.914441][ T341] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 22.914748][ T341] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 22.915138][ T341] ___sys_sendmsg (net/socket.c:2670) 
[ 22.915450][ T341] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 22.915766][ T341] ? __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) 
[ 22.916144][ T341] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 22.916461][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.916769][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 22.917079][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.917391][ T341] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 22.917696][ T341] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 22.918064][ T341] __sys_sendmsg (net/socket.c:2700) 
[ 22.918375][ T341] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 22.918754][ T341] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 22.919072][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 22.919386][ T341] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 22.919693][ T341] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   22.920072][  T341] RIP: 0033:0x7ff77c2631e7
[ 22.920399][ T341] 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)
[   22.921497][  T341] RSP: 002b:00007fff10685f28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   22.921958][  T341] RAX: ffffffffffffffda RBX: 00007fff10686650 RCX: 00007ff77c2631e7
[   22.922427][  T341] RDX: 0000000000000000 RSI: 00007fff10685f90 RDI: 0000000000000005
[   22.922879][  T341] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   22.923337][  T341] R10: 000000002e151910 R11: 0000000000000246 R12: 0000000000000004
[   22.923820][  T341] R13: 00000000686e3a63 R14: 0000000000499600 R15: 0000000000000000
| [   23.133077][  T343] ------------[ cut here ]------------
| [ 23.133457][ T343] WARNING: CPU: 2 PID: 343 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) 
| [   23.134082][  T343] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   23.136214][  T343] Tainted: [W]=WARN
[   23.136468][  T343] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.136869][ T343] 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) 
[ 23.137233][ T343] 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
[   23.138366][  T343] RSP: 0018:ffffc90000646ef0 EFLAGS: 00010246
[   23.138768][  T343] RAX: 0000000000000000 RBX: ffff888009b52000 RCX: 0000000000000001
[   23.139241][  T343] RDX: 0000000000000000 RSI: ffffffff8fe9b941 RDI: ffffffff8f6555e0
[   23.139721][  T343] RBP: ffffc90000646fe0 R08: 0000000000000000 R09: 0000000000000000
[   23.140189][  T343] R10: ffffc90000647010 R11: ffffffff90ca8918 R12: 1ffff920000c8de2
[   23.140669][  T343] R13: 00000000000005dc R14: ffffc90000647010 R15: ffff888009b52f08
[   23.141143][  T343] FS:  00007fd6a170d800(0000) GS:ffff8880a43b7000(0000) knlGS:0000000000000000
[   23.141720][  T343] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.142120][  T343] CR2: 00000000004e5ab0 CR3: 000000000bf18005 CR4: 0000000000772ef0
[   23.142601][  T343] PKRU: 55555554
[   23.142845][  T343] Call Trace:
[   23.143087][  T343]  <TASK>
[ 23.143264][ T343] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.143610][ T343] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.143937][ T343] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 23.144272][ T343] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 23.144678][ T343] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.145000][ T343] netif_set_mtu (net/core/dev.c:9652) 
[ 23.145317][ T343] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.145661][ T343] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 23.146094][ T343] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.146351][ T343] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 23.146777][ T343] br_add_if (net/bridge/br_if.c:697) bridge 
[ 23.147136][ T343] do_set_master (net/core/rtnetlink.c:2948) 
[ 23.147467][ T343] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 23.147793][ T343] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 23.148196][ T343] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 23.148523][ T343] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 23.148838][ T343] ? __kernel_text_address (kernel/extable.c:79) 
[ 23.149160][ T343] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.149488][ T343] ? __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) 
[ 23.149809][ T343] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 23.150207][ T343] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.150543][ T343] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.150861][ T343] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 23.151181][ T343] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 23.151511][ T343] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.151831][ T343] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.152143][ T343] ? __create_object (mm/kmemleak.c:771) 
[ 23.152478][ T343] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 23.152798][ T343] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 23.153118][ T343] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.153533][ T343] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 23.153859][ T343] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.154181][ T343] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.154510][ T343] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.154833][ T343] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.155154][ T343] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.155482][ T343] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.155804][ T343] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.156122][ T343] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.156449][ T343] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.156769][ T343] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.157095][ T343] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.157423][ T343] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.157743][ T343] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.158070][ T343] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.158395][ T343] ? 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) 
[ 23.158716][ T343] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.159036][ T343] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.159363][ T343] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.159685][ T343] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.160011][ T343] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.160329][ T343] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.160665][ T343] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.160993][ T343] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.161311][ T343] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.161724][ T343] ___sys_sendmsg (net/socket.c:2670) 
[ 23.162044][ T343] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 23.162377][ T343] ? __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) 
[ 23.162795][ T343] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.163132][ T343] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.163478][ T343] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.163804][ T343] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.164139][ T343] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 23.164501][ T343] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.164848][ T343] __sys_sendmsg (net/socket.c:2700) 
[ 23.165182][ T343] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 23.165605][ T343] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.165952][ T343] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.166292][ T343] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.166636][ T343] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.167059][  T343] RIP: 0033:0x7fd6a18da1e7
[ 23.167413][ T343] 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)
[   23.168582][  T343] RSP: 002b:00007ffccc713f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.169081][  T343] RAX: ffffffffffffffda RBX: 00007ffccc714630 RCX: 00007fd6a18da1e7
[   23.169588][  T343] RDX: 0000000000000000 RSI: 00007ffccc713f70 RDI: 0000000000000005
[   23.170086][  T343] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   23.170590][  T343] R10: 000000003c8de910 R11: 0000000000000246 R12: 0000000000000004
[   23.171083][  T343] R13: 00000000686e3a63 R14: 0000000000499600 R15: 0000000000000000
| [   23.568924][  T346] ------------[ cut here ]------------
| [ 23.569274][ T346] WARNING: CPU: 0 PID: 346 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) 
| [   23.569969][  T346] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   23.571471][  T346] Tainted: [W]=WARN
[   23.571704][  T346] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.572124][ T346] 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) 
[ 23.572465][ T346] 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
[   23.573661][  T346] RSP: 0018:ffffc90000677000 EFLAGS: 00010246
[   23.574076][  T346] RAX: 0000000000000000 RBX: ffff8880088a9000 RCX: 0000000000000001
[   23.574567][  T346] RDX: 0000000000000000 RSI: ffffffff8fe9b941 RDI: ffffffff8f6555e0
[   23.575059][  T346] RBP: ffffc900006770e8 R08: ffff8880088a9218 R09: 0000000000000000
[   23.575553][  T346] R10: ffffc90000677118 R11: ffffffff90379160 R12: 1ffff920000cee04
[   23.576034][  T346] R13: 00000000000005b6 R14: ffffc90000677118 R15: ffff8880088a9218
[   23.576523][  T346] FS:  00007f6cd0ca1800(0000) GS:ffff8880a42b7000(0000) knlGS:0000000000000000
[   23.577081][  T346] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.577509][  T346] CR2: 00007f6cd0da1130 CR3: 000000000e5f2001 CR4: 0000000000772ef0
[   23.577990][  T346] PKRU: 55555554
[   23.578235][  T346] Call Trace:
[   23.578480][  T346]  <TASK>
[ 23.578643][ T346] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 23.579043][ T346] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.579379][ T346] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.579705][ T346] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 23.580028][ T346] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.580364][ T346] netif_set_mtu (net/core/dev.c:9652) 
[ 23.580683][ T346] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.581014][ T346] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 23.581335][ T346] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.581606][ T346] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 23.581928][ T346] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 23.582253][ T346] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 23.582588][ T346] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 23.582987][ T346] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 23.583315][ T346] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 23.583661][ T346] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 23.583991][ T346] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 23.584306][ T346] ? __dev_get_by_name (net/core/dev.c:865) 
[ 23.584642][ T346] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 23.584964][ T346] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 23.585289][ T346] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.585623][ T346] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 23.585953][ T346] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 23.586288][ T346] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.586622][ T346] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.586960][ T346] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.587281][ T346] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.587614][ T346] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.587936][ T346] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.588260][ T346] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.588595][ T346] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.588922][ T346] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.589238][ T346] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.589562][ T346] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.589871][ T346] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.590186][ T346] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 23.590498][ T346] ? 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) 
[ 23.590807][ T346] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 23.591117][ T346] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 23.591449][ T346] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.591758][ T346] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 23.592077][ T346] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 23.592399][ T346] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 23.592713][ T346] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 23.593023][ T346] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 23.593331][ T346] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 23.593754][ T346] ___sys_sendmsg (net/socket.c:2670) 
[ 23.594061][ T346] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 23.594380][ T346] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 23.594687][ T346] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 23.594990][ T346] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 23.595305][ T346] ? __handle_mm_fault (mm/memory.c:6212) 
[ 23.595627][ T346] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 23.595943][ T346] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 23.596273][ T346] __sys_sendmsg (net/socket.c:2700) 
[ 23.596601][ T346] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 23.596923][ T346] ? 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) 
[ 23.597251][ T346] ? 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) 
[ 23.597589][ T346] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.597898][ T346] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.598205][ T346] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.598598][  T346] RIP: 0033:0x7f6cd0e6e1e7
[ 23.598915][ T346] 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)
[   23.600021][  T346] RSP: 002b:00007ffe539b0718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   23.600495][  T346] RAX: ffffffffffffffda RBX: 00007ffe539b0e40 RCX: 00007f6cd0e6e1e7
[   23.600958][  T346] RDX: 0000000000000000 RSI: 00007ffe539b0780 RDI: 0000000000000005
[   23.601451][  T346] RBP: 0000000000000008 R08: 00000000000000ac R09: 0000000000000000
[   23.601932][  T346] R10: 00007f6cd0d666f8 R11: 0000000000000246 R12: 00007ffe539b0e60
[   23.602416][  T346] R13: 00000000686e3a64 R14: 0000000000499600 R15: 00007ffe539b0868
| [   24.876689][  T362] ------------[ cut here ]------------
| [ 24.877005][ T362] WARNING: CPU: 3 PID: 362 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) 
| [   24.877626][  T362] Modules linked in: 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   24.879185][  T362] Tainted: [W]=WARN
[   24.880463][  T362] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.880848][ T362] 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) 
[ 24.881164][ T362] 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
[   24.882266][  T362] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   24.882666][  T362] RAX: 0000000000000000 RBX: ffff88800e442000 RCX: 0000000000000001
[   24.883123][  T362] RDX: 0000000000000000 RSI: ffffffff8fe9b941 RDI: ffffffff8f6555e0
[   24.883601][  T362] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   24.884072][  T362] R10: ffffc90000587010 R11: ffffffff90ca8918 R12: 1ffff920000b0de2
[   24.884547][  T362] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff88800e442f08
[   24.885008][  T362] FS:  00007fb9bf8eb800(0000) GS:ffff8880a4437000(0000) knlGS:0000000000000000
[   24.885571][  T362] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.885966][  T362] CR2: 00000000004e6898 CR3: 000000000994d002 CR4: 0000000000772ef0
[   24.886437][  T362] PKRU: 55555554
[   24.886669][  T362] Call Trace:
[   24.886896][  T362]  <TASK>
[ 24.887055][ T362] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 24.887372][ T362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.887699][ T362] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 24.888013][ T362] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 24.888409][ T362] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 24.888722][ T362] netif_set_mtu (net/core/dev.c:9652) 
[ 24.889031][ T362] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 24.889359][ T362] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 24.889793][ T362] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 24.890027][ T362] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 24.890488][ T362] br_add_if (net/bridge/br_if.c:697) bridge 
[ 24.890842][ T362] do_set_master (net/core/rtnetlink.c:2948) 
[ 24.891156][ T362] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 24.891477][ T362] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 24.891871][ T362] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.892186][ T362] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 24.892502][ T362] ? __kernel_text_address (kernel/extable.c:79) 
[ 24.892820][ T362] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.893133][ T362] ? __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) 
[ 24.893470][ T362] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 24.893853][ T362] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.894162][ T362] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.894484][ T362] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 24.894792][ T362] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 24.895098][ T362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.895417][ T362] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 24.895722][ T362] ? __create_object (mm/kmemleak.c:771) 
[ 24.896030][ T362] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 24.896349][ T362] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 24.896657][ T362] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 24.897041][ T362] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 24.897363][ T362] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 24.897677][ T362] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.897981][ T362] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.898294][ T362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.898609][ T362] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 24.898913][ T362] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.899224][ T362] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.899545][ T362] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 24.899854][ T362] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.900162][ T362] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.900482][ T362] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 24.900795][ T362] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.901103][ T362] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 24.901428][ T362] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.901742][ T362] ? 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) 
[ 24.902048][ T362] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.902854][ T362] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.903624][ T362] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.903938][ T362] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.904250][ T362] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.904787][ T362] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.905334][ T362] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.905655][ T362] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.906181][ T362] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.906805][ T362] ___sys_sendmsg (net/socket.c:2670) 
[ 24.907108][ T362] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 24.907424][ T362] ? __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) 
[ 24.907806][ T362] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.908354][ T362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.908662][ T362] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.908974][ T362] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.909279][ T362] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 24.909602][ T362] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.909917][ T362] __sys_sendmsg (net/socket.c:2700) 
[ 24.910222][ T362] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 24.910616][ T362] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.910935][ T362] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.911245][ T362] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.911781][ T362] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.912161][  T362] RIP: 0033:0x7fb9bfab81e7
[ 24.912487][ T362] 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)
[   24.913604][  T362] RSP: 002b:00007ffc9c8c3768 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.914066][  T362] RAX: ffffffffffffffda RBX: 00007ffc9c8c3e90 RCX: 00007fb9bfab81e7
[   24.914531][  T362] RDX: 0000000000000000 RSI: 00007ffc9c8c37d0 RDI: 0000000000000005
[   24.914985][  T362] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   24.915614][  T362] R10: 000000003a0de910 R11: 0000000000000246 R12: 0000000000000004


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