======================================
| [   20.815348][  T313] ip_gre: GRE over IPv4 tunneling driver
| [   20.907457][  T312] ------------[ cut here ]------------
| [ 20.908383][ T312] WARNING: CPU: 3 PID: 312 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) 
| [   20.909060][  T312] Modules linked in: ip_gre gre sch_ingress vrf veth
[   20.910280][  T312] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.910682][ T312] 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) 
[ 20.911008][ T312] 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
[   20.912115][  T312] RSP: 0018:ffffc900005a7000 EFLAGS: 00010246
[   20.912512][  T312] RAX: 0000000000000000 RBX: ffff888005a44000 RCX: 0000000000000001
[   20.912988][  T312] RDX: 0000000000000000 RSI: ffffffffaca9b941 RDI: ffffffffac2555e0
[   20.913452][  T312] RBP: ffffc900005a70e8 R08: ffff888005a44218 R09: 0000000000000000
[   20.913925][  T312] R10: ffffc900005a7118 R11: ffffffffacf79160 R12: 1ffff920000b4e04
[   20.914387][  T312] R13: 00000000000005b6 R14: ffffc900005a7118 R15: ffff888005a44218
[   20.914861][  T312] FS:  00007fbe19b73800(0000) GS:ffff888087837000(0000) knlGS:0000000000000000
[   20.915451][  T312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.915850][  T312] CR2: 000055b6a18199c8 CR3: 000000000a6d7005 CR4: 0000000000772ef0
[   20.916332][  T312] PKRU: 55555554
[   20.916574][  T312] Call Trace:
[   20.916820][  T312]  <TASK>
[ 20.917102][ T312] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 20.917504][ T312] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.917841][ T312] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.918154][ T312] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 20.918479][ T312] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.918817][ T312] netif_set_mtu (net/core/dev.c:9652) 
[ 20.919133][ T312] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.919452][ T312] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 20.919770][ T312] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.920000][ T312] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 20.920311][ T312] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 20.920622][ T312] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 20.921154][ T312] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 20.921544][ T312] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 20.921869][ T312] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 20.922179][ T312] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 20.922487][ T312] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 20.922800][ T312] ? __dev_get_by_name (net/core/dev.c:865) 
[ 20.923107][ T312] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 20.923419][ T312] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 20.923735][ T312] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.924038][ T312] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 20.924354][ T312] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 20.924674][ T312] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.924994][ T312] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.925314][ T312] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.925619][ T312] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.925933][ T312] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.926239][ T312] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.926799][ T312] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.927115][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.927431][ T312] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.927753][ T312] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.928059][ T312] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.928375][ T312] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.928690][ T312] ? 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) 
[ 20.929225][ T312] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.929982][ T312] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.930288][ T312] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.930596][ T312] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.930913][ T312] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.931227][ T312] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.931999][ T312] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.932320][ T312] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.933291][ T312] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.933691][ T312] ___sys_sendmsg (net/socket.c:2670) 
[ 20.934002][ T312] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.934526][ T312] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 20.934855][ T312] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 20.935168][ T312] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 20.935498][ T312] ? __handle_mm_fault (mm/memory.c:6212) 
[ 20.935814][ T312] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 20.936123][ T312] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 20.936904][ T312] __sys_sendmsg (net/socket.c:2700) 
[ 20.937210][ T312] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.937512][ T312] ? 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) 
[ 20.937848][ T312] ? 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) 
[ 20.938159][ T312] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.938472][ T312] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.938787][ T312] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.939392][  T312] RIP: 0033:0x7fbe19d401e7
[ 20.939743][ T312] Code: Unable to access opcode bytes at 0x7fbe19d401bd.

Code starting with the faulting instruction
===========================================
[   20.940140][  T312] RSP: 002b:00007ffcee2bd068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.940617][  T312] RAX: ffffffffffffffda RBX: 00007ffcee2bd790 RCX: 00007fbe19d401e7
[   20.941309][  T312] RDX: 0000000000000000 RSI: 00007ffcee2bd0d0 RDI: 0000000000000005
[   20.941790][  T312] RBP: 0000000000000004 R08: 00000000000000b0 R09: 0000000000000000
[   20.942483][  T312] R10: 00007fbe19c386f8 R11: 0000000000000246 R12: 00007ffcee2bd7b0
[   20.943214][  T312] R13: 00000000686e1ab1 R14: 0000000000499600 R15: 00007ffcee2bd1bc
| [   23.974101][  T339] ------------[ cut here ]------------
| [ 23.974464][ T339] WARNING: CPU: 3 PID: 339 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) 
| [   23.975107][  T339] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   23.976539][  T339] Tainted: [W]=WARN
[   23.976793][  T339] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.977381][ T339] 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) 
[ 23.977710][ T339] 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
[   23.979953][  T339] RSP: 0018:ffffc90000586ef0 EFLAGS: 00010246
[   23.980363][  T339] RAX: 0000000000000000 RBX: ffff8880056f2000 RCX: 0000000000000001
[   23.980848][  T339] RDX: 0000000000000000 RSI: ffffffffaca9b941 RDI: ffffffffac2555e0
[   23.981312][  T339] RBP: ffffc90000586fe0 R08: 0000000000000000 R09: 0000000000000000
[   23.981817][  T339] R10: ffffc90000587010 R11: ffffffffad8a8918 R12: 1ffff920000b0de2
[   23.982286][  T339] R13: 00000000000005dc R14: ffffc90000587010 R15: ffff8880056f2f08
[   23.982758][  T339] FS:  00007fc7565b1800(0000) GS:ffff888087837000(0000) knlGS:0000000000000000
[   23.983294][  T339] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   23.983691][  T339] CR2: 00000000004e5aa8 CR3: 000000001023d004 CR4: 0000000000772ef0
[   23.984153][  T339] PKRU: 55555554
[   23.984384][  T339] Call Trace:
[   23.984620][  T339]  <TASK>
[ 23.984801][ T339] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 23.985121][ T339] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.985440][ T339] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 23.985781][ T339] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 23.986170][ T339] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 23.986500][ T339] netif_set_mtu (net/core/dev.c:9652) 
[ 23.986819][ T339] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 23.987134][ T339] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 23.987572][ T339] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 23.987828][ T339] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 23.988248][ T339] br_add_if (net/bridge/br_if.c:697) bridge 
[ 23.988600][ T339] do_set_master (net/core/rtnetlink.c:2948) 
[ 23.988923][ T339] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 23.989249][ T339] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 23.989654][ T339] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 23.989984][ T339] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 23.990298][ T339] ? __kernel_text_address (kernel/extable.c:79) 
[ 23.990631][ T339] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.990950][ T339] ? __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) 
[ 23.991277][ T339] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 23.991687][ T339] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.991997][ T339] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.992311][ T339] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 23.992642][ T339] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 23.992974][ T339] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.993302][ T339] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 23.993605][ T339] ? __create_object (mm/kmemleak.c:771) 
[ 23.993949][ T339] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 23.994276][ T339] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 23.994638][ T339] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.995051][ T339] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 23.995391][ T339] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 23.995742][ T339] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.996059][ T339] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.996416][ T339] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 23.996748][ T339] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 23.997066][ T339] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 23.997394][ T339] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 23.997710][ T339] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 23.998053][ T339] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.998391][ T339] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 23.998712][ T339] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 23.999052][ T339] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 23.999385][ T339] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 23.999743][ T339] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.000078][ T339] ? 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) 
[ 24.000402][ T339] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.000723][ T339] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.001026][ T339] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.001368][ T339] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.001708][ T339] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.002028][ T339] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.002360][ T339] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.002696][ T339] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.003010][ T339] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.003431][ T339] ___sys_sendmsg (net/socket.c:2670) 
[ 24.003773][ T339] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 24.004102][ T339] ? __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) 
[ 24.004496][ T339] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.004816][ T339] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.005144][ T339] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.005457][ T339] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.005775][ T339] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 24.006090][ T339] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.006416][ T339] __sys_sendmsg (net/socket.c:2700) 
[ 24.006731][ T339] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 24.007111][ T339] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.007435][ T339] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.007775][ T339] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.008091][ T339] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.008486][  T339] RIP: 0033:0x7fc75677e1e7
[ 24.008815][ T339] 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)
[   24.009955][  T339] RSP: 002b:00007ffcc53c9f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.010446][  T339] RAX: ffffffffffffffda RBX: 00007ffcc53ca630 RCX: 00007fc75677e1e7
[   24.010924][  T339] RDX: 0000000000000000 RSI: 00007ffcc53c9f70 RDI: 0000000000000005
[   24.011397][  T339] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   24.011876][  T339] R10: 0000000021e77910 R11: 0000000000000246 R12: 0000000000000004
[   24.012356][  T339] R13: 00000000686e1ab4 R14: 0000000000499600 R15: 0000000000000000
| [   24.249725][  T341] ------------[ cut here ]------------
| [ 24.250053][ T341] WARNING: CPU: 3 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) 
| [   24.250709][  T341] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   24.253923][  T341] Tainted: [W]=WARN
[   24.254171][  T341] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.254554][ 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) 
[ 24.255119][ 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
[   24.256374][  T341] RSP: 0018:ffffc90000566ef0 EFLAGS: 00010246
[   24.256841][  T341] RAX: 0000000000000000 RBX: ffff8880056f2000 RCX: 0000000000000001
[   24.257325][  T341] RDX: 0000000000000000 RSI: ffffffffaca9b941 RDI: ffffffffac2555e0
[   24.257824][  T341] RBP: ffffc90000566fe0 R08: 0000000000000000 R09: 0000000000000000
[   24.258323][  T341] R10: ffffc90000567010 R11: ffffffffad8a8918 R12: 1ffff920000acde2
[   24.258824][  T341] R13: 00000000000005dc R14: ffffc90000567010 R15: ffff8880056f2f08
[   24.259311][  T341] FS:  00007f355242b800(0000) GS:ffff888087837000(0000) knlGS:0000000000000000
[   24.259890][  T341] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.260297][  T341] CR2: 00000000004e5ab0 CR3: 000000000e93c001 CR4: 0000000000772ef0
[   24.260792][  T341] PKRU: 55555554
[   24.261041][  T341] Call Trace:
[   24.261284][  T341]  <TASK>
[ 24.261452][ T341] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 24.261797][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.262133][ T341] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 24.262459][ T341] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 24.262873][ T341] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 24.263203][ T341] netif_set_mtu (net/core/dev.c:9652) 
[ 24.263531][ T341] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 24.263871][ T341] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 24.264319][ T341] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 24.264564][ T341] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 24.265007][ T341] br_add_if (net/bridge/br_if.c:697) bridge 
[ 24.265371][ T341] do_set_master (net/core/rtnetlink.c:2948) 
[ 24.265720][ T341] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 24.266093][ T341] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 24.266509][ T341] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.266831][ T341] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 24.267150][ T341] ? __kernel_text_address (kernel/extable.c:79) 
[ 24.267463][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.267791][ 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) 
[ 24.268113][ T341] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 24.268496][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.268818][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.269139][ T341] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 24.269465][ T341] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 24.269829][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.270159][ T341] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 24.270474][ T341] ? __create_object (mm/kmemleak.c:771) 
[ 24.270822][ T341] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 24.271143][ T341] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 24.271464][ T341] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 24.271864][ T341] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 24.272195][ T341] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 24.272532][ T341] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.272880][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.273201][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.273523][ T341] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 24.273854][ T341] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.274165][ T341] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.274474][ T341] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 24.274802][ T341] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.275117][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.275433][ T341] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 24.275764][ T341] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.276074][ T341] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 24.276413][ T341] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.276728][ 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) 
[ 24.277045][ T341] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.277366][ T341] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.277686][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.278015][ T341] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.278332][ T341] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.278663][ T341] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.279005][ T341] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.279327][ T341] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.279633][ T341] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.280048][ T341] ___sys_sendmsg (net/socket.c:2670) 
[ 24.280373][ T341] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 24.280700][ 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) 
[ 24.281088][ T341] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.281417][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.281744][ T341] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.282062][ T341] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.282386][ 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) 
[ 24.282724][ T341] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.283056][ T341] __sys_sendmsg (net/socket.c:2700) 
[ 24.283395][ T341] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 24.283801][ T341] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.284128][ T341] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.284454][ T341] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.284775][ T341] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.285168][  T341] RIP: 0033:0x7f35525f81e7
[ 24.285512][ 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)
[   24.286704][  T341] RSP: 002b:00007ffcd156cba8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.287199][  T341] RAX: ffffffffffffffda RBX: 00007ffcd156d2d0 RCX: 00007f35525f81e7
[   24.287709][  T341] RDX: 0000000000000000 RSI: 00007ffcd156cc10 RDI: 0000000000000005
[   24.288189][  T341] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   24.288688][  T341] R10: 000000002e30d910 R11: 0000000000000246 R12: 0000000000000004
[   24.289175][  T341] R13: 00000000686e1ab4 R14: 0000000000499600 R15: 0000000000000000
| [   24.733581][  T344] ------------[ cut here ]------------
| [ 24.733972][ T344] WARNING: CPU: 1 PID: 344 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) 
| [   24.734680][  T344] Modules linked in: bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   24.736239][  T344] Tainted: [W]=WARN
[   24.736501][  T344] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.736921][ T344] 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) 
[ 24.737253][ T344] 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
[   24.738485][  T344] RSP: 0018:ffffc90000577000 EFLAGS: 00010246
[   24.738906][  T344] RAX: 0000000000000000 RBX: ffff88800a691000 RCX: 0000000000000001
[   24.739391][  T344] RDX: 0000000000000000 RSI: ffffffffaca9b941 RDI: ffffffffac2555e0
[   24.739883][  T344] RBP: ffffc900005770e8 R08: ffff88800a691218 R09: 0000000000000000
[   24.740366][  T344] R10: ffffc90000577118 R11: ffffffffacf79160 R12: 1ffff920000aee04
[   24.740952][  T344] R13: 00000000000005b6 R14: ffffc90000577118 R15: ffff88800a691218
[   24.741436][  T344] FS:  00007fdbb0347800(0000) GS:ffff888087737000(0000) knlGS:0000000000000000
[   24.742070][  T344] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.742525][  T344] CR2: 0000000000436890 CR3: 0000000010233004 CR4: 0000000000772ef0
[   24.743047][  T344] PKRU: 55555554
[   24.743305][  T344] Call Trace:
[   24.743548][  T344]  <TASK>
[ 24.743722][ T344] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 24.744131][ T344] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 24.744454][ T344] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 24.744993][ T344] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 24.745510][ T344] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 24.746035][ T344] netif_set_mtu (net/core/dev.c:9652) 
[ 24.746565][ T344] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 24.746940][ T344] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 24.747270][ T344] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 24.747514][ T344] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 24.747853][ T344] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 24.748183][ T344] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 24.748515][ T344] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 24.748929][ T344] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 24.749262][ T344] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 24.749588][ T344] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 24.749961][ T344] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 24.750284][ T344] ? __dev_get_by_name (net/core/dev.c:865) 
[ 24.750614][ T344] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 24.750950][ T344] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 24.751283][ T344] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 24.751602][ T344] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 24.751941][ T344] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 24.752277][ T344] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 24.752609][ T344] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.752953][ T344] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 24.753282][ T344] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 24.753607][ T344] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 24.753935][ T344] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 24.754261][ T344] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.754592][ T344] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.754932][ T344] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 24.755259][ T344] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 24.755586][ T344] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 24.755934][ T344] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 24.756255][ T344] ? 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) 
[ 24.756597][ T344] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 24.756939][ T344] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 24.757263][ T344] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 24.757600][ T344] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 24.757938][ T344] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 24.758270][ T344] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 24.758605][ T344] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 24.758946][ T344] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 24.759271][ T344] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 24.759692][ T344] ___sys_sendmsg (net/socket.c:2670) 
[ 24.760016][ T344] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 24.760335][ T344] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 24.760678][ T344] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 24.761002][ T344] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 24.761328][ T344] ? __handle_mm_fault (mm/memory.c:6212) 
[ 24.761652][ T344] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 24.761984][ T344] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 24.762326][ T344] __sys_sendmsg (net/socket.c:2700) 
[ 24.762658][ T344] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 24.762993][ T344] ? 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) 
[ 24.763328][ T344] ? 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) 
[ 24.763652][ T344] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 24.763991][ T344] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 24.764318][ T344] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.764730][  T344] RIP: 0033:0x7fdbb05141e7
[ 24.765070][ T344] 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)
[   24.766226][  T344] RSP: 002b:00007ffcbab27e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.766743][  T344] RAX: ffffffffffffffda RBX: 00007ffcbab285b0 RCX: 00007fdbb05141e7
[   24.767231][  T344] RDX: 0000000000000000 RSI: 00007ffcbab27ef0 RDI: 0000000000000005
[   24.767722][  T344] RBP: 0000000000000008 R08: 00000000000000ac R09: 0000000000000000
[   24.768213][  T344] R10: 00007fdbb040c6f8 R11: 0000000000000246 R12: 00007ffcbab285d0
[   24.768708][  T344] R13: 00000000686e1ab5 R14: 0000000000499600 R15: 00007ffcbab27fd8
| [  131.996343][  T784] ------------[ cut here ]------------
| [ 131.996926][ T784] WARNING: CPU: 1 PID: 784 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) 
| [  131.997591][  T784] Modules linked in: act_mirred cls_flower bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [  131.999133][  T784] Tainted: [W]=WARN
[  131.999374][  T784] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 131.999789][ T784] 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) 
[ 132.000134][ T784] 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
[  132.001253][  T784] RSP: 0018:ffffc900015af000 EFLAGS: 00010246
[  132.001785][  T784] RAX: 0000000000000000 RBX: ffff88800b961000 RCX: 0000000000000001
[  132.002569][  T784] RDX: 0000000000000000 RSI: ffffffffaca9b941 RDI: ffffffffac2555e0
[  132.003422][  T784] RBP: ffffc900015af0e8 R08: ffff88800b961218 R09: 0000000000000000
[  132.004279][  T784] R10: ffffc900015af118 R11: ffffffffa96910a8 R12: 1ffff920002b5e04
[  132.005114][  T784] R13: 00000000000005b6 R14: ffffc900015af118 R15: ffff88800b961218
[  132.005969][  T784] FS:  00007f9c9163a800(0000) GS:ffff888087737000(0000) knlGS:0000000000000000
[  132.006997][  T784] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.007718][  T784] CR2: 0000000000436890 CR3: 0000000002079005 CR4: 0000000000772ef0
[  132.008534][  T784] PKRU: 55555554
[  132.008939][  T784] Call Trace:
[  132.009207][  T784]  <TASK>
[ 132.009366][ T784] ? __pfx_ip_route_output_key_hash (net/ipv4/route.c:2684) 
[ 132.009802][ T784] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 132.010118][ T784] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 132.010458][ T784] ? crng_make_state (drivers/char/random.c:393 (discriminator 1)) 
[ 132.010800][ T784] netif_set_mtu (net/core/dev.c:9652) 
[ 132.011117][ T784] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 132.011443][ T784] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[ 132.011773][ T784] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 132.012006][ T784] ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1246) 
[ 132.012372][ T784] ? __pfx_ip_tunnel_newlink (net/ipv4/ip_tunnel.c:1209) 
[ 132.012713][ T784] ipgre_newlink (net/ipv4/ip_gre.c:1415 (discriminator 4)) ip_gre 
[ 132.013026][ T784] ? __pfx_ipgre_newlink (net/ipv4/ip_gre.c:1401) ip_gre 
[ 132.013418][ T784] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 132.013795][ T784] ? rtnl_create_link (net/core/rtnetlink.c:3642) 
[ 132.014114][ T784] rtnl_newlink_create (net/core/rtnetlink.c:3825) 
[ 132.014452][ T784] ? __pfx_rtnl_newlink_create (net/core/rtnetlink.c:3791) 
[ 132.014782][ T784] ? __dev_get_by_name (net/core/dev.c:865) 
[ 132.015096][ T784] ? rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 132.015419][ T784] ? __pfx_rtnl_dev_get (net/core/rtnetlink.c:3404) 
[ 132.015750][ T784] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 132.016056][ T784] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 132.016369][ T784] __rtnl_newlink (net/core/rtnetlink.c:3942) 
[ 132.016720][ T784] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 132.017041][ T784] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 132.017358][ T784] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 132.017695][ T784] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 132.018003][ T784] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 132.018306][ T784] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 132.018650][ T784] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 132.018976][ T784] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 132.019289][ T784] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 132.019750][ T784] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 132.020063][ T784] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 132.020383][ T784] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 132.020709][ T784] ? 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) 
[ 132.021018][ T784] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 132.021329][ T784] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 132.021641][ T784] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 132.021982][ T784] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 132.022292][ T784] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 132.022665][ T784] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 132.023001][ T784] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 132.023316][ T784] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 132.023636][ T784] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 132.024047][ T784] ___sys_sendmsg (net/socket.c:2670) 
[ 132.024362][ T784] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 132.024695][ T784] ? __pfx_handle_pte_fault (mm/memory.c:6026) 
[ 132.025007][ T784] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 132.025312][ T784] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 132.025656][ T784] ? __handle_mm_fault (mm/memory.c:6212) 
[ 132.025984][ T784] ? __pfx___handle_mm_fault (mm/memory.c:6121) 
[ 132.026298][ T784] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 132.026686][ T784] __sys_sendmsg (net/socket.c:2700) 
[ 132.027001][ T784] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 132.027307][ T784] ? 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) 
[ 132.027640][ T784] ? 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) 
[ 132.027967][ T784] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 132.028278][ T784] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 132.028603][ T784] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  132.029014][  T784] RIP: 0033:0x7f9c918071e7
[ 132.029337][ T784] 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)
[  132.030513][  T784] RSP: 002b:00007ffd39305708 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  132.031002][  T784] RAX: ffffffffffffffda RBX: 00007ffd39305e30 RCX: 00007f9c918071e7
[  132.031537][  T784] RDX: 0000000000000000 RSI: 00007ffd39305770 RDI: 0000000000000005
[  132.032011][  T784] RBP: 0000000000000008 R08: 00000000000000ac R09: 0000000000000000
[  132.032486][  T784] R10: 00007f9c916ff6f8 R11: 0000000000000246 R12: 00007ffd39305e50


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