======================================
| WAIT TIMEOUT stdout
| [  935.855968][ T5421] ip (5421) used greatest stack depth: 23328 bytes left
| [  940.843143][ T5452] Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [  940.843628][ T5452] KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127]
[  940.844132][ T5452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 940.844480][ T5452] RIP: 0010:neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[ 940.844685][ T5452] Code: 0f 85 ef 04 00 00 49 8d 7f 08 49 8b 1f 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 cc 04 00 00 49 8b 6f 08 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 19 05 00 00 48 89 5d 00 48 85 db 74 1a 48 8d
All code
========
   0:	0f 85 ef 04 00 00    	jne    0x4f5
   6:	49 8d 7f 08          	lea    0x8(%r15),%rdi
   a:	49 8b 1f             	mov    (%r15),%rbx
   d:	48 89 f8             	mov    %rdi,%rax
  10:	48 c1 e8 03          	shr    $0x3,%rax
  14:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  19:	0f 85 cc 04 00 00    	jne    0x4eb
  1f:	49 8b 6f 08          	mov    0x8(%r15),%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)		<-- trapping instruction
  2f:	0f 85 19 05 00 00    	jne    0x54e
  35:	48 89 5d 00          	mov    %rbx,0x0(%rbp)
  39:	48 85 db             	test   %rbx,%rbx
  3c:	74 1a                	je     0x58
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d

Code starting with the faulting instruction
===========================================
   0:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   5:	0f 85 19 05 00 00    	jne    0x524
   b:	48 89 5d 00          	mov    %rbx,0x0(%rbp)
   f:	48 85 db             	test   %rbx,%rbx
  12:	74 1a                	je     0x2e
  14:	48                   	rex.W
  15:	8d                   	.byte 0x8d
[  940.845218][ T5452] RSP: 0018:ffffc900025fef10 EFLAGS: 00010a06
[  940.845409][ T5452] RAX: 1bd5a00000000024 RBX: 0000000000000000 RCX: 0000000000000000
[  940.845638][ T5452] RDX: 1ffff1100101399e RSI: ffff88800809c000 RDI: ffff88800d68c008
[  940.845865][ T5452] RBP: dead000000000122 R08: ffff88800d68c000 R09: fffff520004bfde3
[  940.846088][ T5452] R10: 0000000000000003 R11: ffffc900025feac9 R12: ffff88800d68c13c
[  940.846313][ T5452] R13: dffffc0000000000 R14: ffff88800809c000 R15: ffff88800d68c000
[  940.846541][ T5452] FS:  00007faf8960c800(0000) GS:ffff88802f580000(0000) knlGS:0000000000000000
[  940.846807][ T5452] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  940.846995][ T5452] CR2: 00000000004e2a80 CR3: 000000000c044002 CR4: 0000000000772ef0
[  940.847219][ T5452] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  940.847451][ T5452] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  940.847678][ T5452] PKRU: 55555554
[  940.847795][ T5452] Call Trace:
[  940.847909][ T5452]  <TASK>
[ 940.847988][ T5452] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[ 940.848108][ T5452] ? exc_general_protection (arch/x86/kernel/traps.c:751 arch/x86/kernel/traps.c:693) 
[ 940.848263][ T5452] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[ 940.848419][ T5452] ? neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[ 940.848573][ T5452] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[ 940.848740][ T5452] __neigh_ifdown.isra.0 (net/core/neighbour.c:826 net/core/neighbour.c:426) 
[ 940.848894][ T5452] ? fib_flush (net/ipv4/fib_frontend.c:195 (discriminator 11)) 
[ 940.849013][ T5452] neigh_ifdown (net/core/neighbour.c:445) 
[ 940.849129][ T5452] fib_netdev_event (net/ipv4/fib_frontend.c:1521) 
[ 940.849279][ T5452] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[ 940.849434][ T5452] dev_close_many (net/core/dev.c:1590) 
[ 940.849587][ T5452] ? __pfx_dev_close_many (net/core/dev.c:1577) 
[ 940.849742][ T5452] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 940.849893][ T5452] unregister_netdevice_many_notify (net/core/dev.c:11503) 
[ 940.850091][ T5452] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 940.850242][ T5452] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 940.850393][ T5452] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 940.850540][ T5452] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11470) 
[ 940.850727][ T5452] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3464) 
[ 940.850880][ T5452] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) 
[ 940.851032][ T5452] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 940.851178][ T5452] ? unregister_netdevice_queue (net/core/dev.c:11455) 
[ 940.851363][ T5452] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11454) 
[ 940.851551][ T5452] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 940.851702][ T5452] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11454) 
[ 940.851889][ T5452] rtnl_dellink (net/core/rtnetlink.c:3329 net/core/rtnetlink.c:3379) 
[ 940.852041][ T5452] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 940.852192][ T5452] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3335) 
[ 940.852342][ T5452] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 940.852504][ T5452] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 940.852656][ T5452] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 940.852813][ T5452] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 940.852965][ T5452] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6719) 
[ 940.853115][ T5452] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 940.853276][ T5452] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 940.853424][ T5452] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 940.853578][ T5452] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 940.853729][ T5452] rtnetlink_rcv_msg (net/core/rtnetlink.c:6721) 
[ 940.853880][ T5452] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6615) 
[ 940.854032][ T5452] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 940.854181][ T5452] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 940.854295][ T5452] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 940.854446][ T5452] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 940.854597][ T5452] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6615) 
[ 940.854747][ T5452] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 940.854903][ T5452] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 940.855054][ T5452] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 940.855209][ T5452] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 940.855358][ T5452] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 940.855507][ T5452] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 940.855657][ T5452] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 940.855805][ T5452] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 940.855954][ T5452] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 940.856104][ T5452] ? __import_iovec (lib/iov_iter.c:1433 lib/iov_iter.c:1449) 
[ 940.856259][ T5452] ____sys_sendmsg (net/socket.c:729 net/socket.c:744 net/socket.c:2607) 
[ 940.856416][ T5452] ? __pfx_____sys_sendmsg (net/socket.c:2553) 
[ 940.856563][ T5452] ? __pfx_copy_msghdr_from_user (net/socket.c:2533) 
[ 940.856752][ T5452] ___sys_sendmsg (net/socket.c:2663) 
[ 940.856903][ T5452] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 940.857053][ T5452] ? __pfx____sys_sendmsg (net/socket.c:2650) 
[ 940.857202][ T5452] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 940.857351][ T5452] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 940.857566][ T5452] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 940.857717][ T5452] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 940.857873][ T5452] ? __kasan_record_aux_stack (mm/kasan/generic.c:541) 
[ 940.858022][ T5452] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:123 kernel/rcu/tree.c:3087) 
[ 940.858213][ T5452] ? __x64_sys_close (fs/open.c:1568 fs/open.c:1550 fs/open.c:1550) 
[ 940.858366][ T5452] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 940.858519][ T5452] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 940.858704][ T5452] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 940.858856][ T5452] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 940.859009][ T5452] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 940.859156][ T5452] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[ 940.859274][ T5452] __sys_sendmsg (./include/linux/file.h:35 net/socket.c:2692) 
[ 940.859426][ T5452] ? __pfx___sys_sendmsg (net/socket.c:2678) 
[ 940.859572][ T5452] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2053 arch/x86/mm/physaddr.c:65) 
[ 940.859731][ T5452] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 940.859881][ T5452] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  940.860075][ T5452] RIP: 0033:0x7faf898187b7
[ 940.860235][ T5452] Code: 0a 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:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   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)
[  940.860768][ T5452] RSP: 002b:00007fff7d7c72a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  940.860993][ T5452] RAX: ffffffffffffffda RBX: 00007fff7d7c79d0 RCX: 00007faf898187b7
[  940.861217][ T5452] RDX: 0000000000000000 RSI: 00007fff7d7c7310 RDI: 0000000000000005
[  940.861447][ T5452] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[  940.861669][ T5452] R10: 00007faf896d6ef8 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
neigh_ifdown:fib_netdev_event:notifier_call_chain:dev_close_many:unregister_netdevice_many_notify