======================================
| [  825.903686][T13759] eth1: renamed from tmp
| [  836.467633][T13922] eth1: renamed from tmp
| [  843.348180][T13963] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] SMP KASAN
| [  843.348461][T13963] KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
[  843.348786][T13963] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  843.348922][T13963] RIP: 0010:ip6_rt_pcpu_alloc (./include/net/net_namespace.h:414 (discriminator 10) ./include/linux/netdevice.h:2738 (discriminator 10) net/ipv6/route.c:1418 (discriminator 10))
[  843.349031][T13963] Code: fe ff 0f b7 ed 49 89 c7 e8 de b5 3e 00 49 8d 87 08 01 00 00 48 89 c2 48 89 44 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 de 03 00 00 49 8b 87 08 01 00 00 89 e9 ba ff ff
All code
========
   0:	fe                   	(bad)
   1:	ff 0f                	decl   (%rdi)
   3:	b7 ed                	mov    $0xed,%bh
   5:	49 89 c7             	mov    %rax,%r15
   8:	e8 de b5 3e 00       	call   0x3eb5eb
   d:	49 8d 87 08 01 00 00 	lea    0x108(%r15),%rax
  14:	48 89 c2             	mov    %rax,%rdx
  17:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df 
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)		<-- trapping instruction
  2e:	0f 85 de 03 00 00    	jne    0x412
  34:	49 8b 87 08 01 00 00 	mov    0x108(%r15),%rax
  3b:	89 e9                	mov    %ebp,%ecx
  3d:	ba                   	.byte 0xba
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 de 03 00 00    	jne    0x3e8
   a:	49 8b 87 08 01 00 00 	mov    0x108(%r15),%rax
  11:	89 e9                	mov    %ebp,%ecx
  13:	ba                   	.byte 0xba
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[  843.349397][T13963] RSP: 0018:ffa000000b0474f8 EFLAGS: 00010216
[  843.349516][T13963] RAX: dffffc0000000000 RBX: ff110000142e6e2c RCX: 0000000000000000
[  843.349654][T13963] RDX: 0000000000000021 RSI: dffffc0000000000 RDI: 1fe22000004ac835
[  843.349793][T13963] RBP: 0000000000000008 R08: ff1100001571ad88 R09: ff1100001571ad88
[  843.349934][T13963] R10: 0000000000000003 R11: 0000000000000001 R12: ff110000142e6e00
[  843.350071][T13963] R13: 1ff4000001608ea1 R14: ffa000000b047618 R15: 0000000000000000
[  843.350208][T13963] FS:  00007fbd6293b740(0000) GS:ff110000d958b000(0000) knlGS:0000000000000000
[  843.350367][T13963] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  843.350478][T13963] CR2: 000056050ee1d688 CR3: 000000000e7a0004 CR4: 0000000000771ef0
[  843.350621][T13963] PKRU: 55555554
[  843.350690][T13963] Call Trace:
[  843.350756][T13963]  <TASK>
[  843.350803][T13963]  ? trace_fib6_table_lookup (./include/trace/events/fib6.h:13 (discriminator 33))
[  843.350895][T13963]  ? ip6_rt_cache_alloc.isra.0 (net/ipv6/route.c:1407)
[  843.351004][T13963]  ? __rt6_find_exception_rcu.constprop.0 (net/ipv6/route.c:1610 (discriminator 2))
[  843.351111][T13963]  ip6_pol_route (net/ipv6/route.c:1467 net/ipv6/route.c:2315)
[  843.351198][T13963]  ? ip6_pol_route_lookup (net/ipv6/route.c:2263)
[  843.351289][T13963]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  843.351382][T13963]  ? ip6_pol_route_input (net/ipv6/route.c:2661)
[  843.351472][T13963]  __fib6_rule_action (net/ipv6/fib6_rules.c:239)
[  843.351564][T13963]  fib_rules_lookup (net/core/fib_rules.c:339)
[  843.351654][T13963]  ? fib_nl_dumprule (net/core/fib_rules.c:315)
[  843.351742][T13963]  ? l3mdev_update_flow (./include/linux/rcupdate.h:341 (discriminator 1) ./include/linux/rcupdate.h:897 (discriminator 1) net/l3mdev/l3mdev.c:301 (discriminator 1))
[  843.351830][T13963]  ? ip6_pol_route_input (net/ipv6/route.c:2661)
[  843.351921][T13963]  fib6_rule_lookup (net/ipv6/fib6_rules.c:115)
[  843.352008][T13963]  ? fib6_lookup (net/ipv6/fib6_rules.c:99)
[  843.352097][T13963]  ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1))
[  843.352186][T13963]  ? ip6_pol_route_input (net/ipv6/route.c:2661)
[  843.352275][T13963]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  843.352364][T13963]  ? ip6_route_output_flags (./include/linux/rcupdate.h:331 (discriminator 1) ./include/linux/rcupdate.h:867 (discriminator 1) net/ipv6/route.c:2706 (discriminator 1))
[  843.352450][T13963]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  843.352542][T13963]  ip6_route_output_flags (net/ipv6/route.c:2695 net/ipv6/route.c:2707)
[  843.352629][T13963]  ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1141 (discriminator 1))
[  843.352742][T13963]  ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1273)
[  843.352828][T13963]  ? ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1268)
[  843.352937][T13963]  ? sk_dst_check (./include/linux/rcupdate.h:341 (discriminator 1) ./include/linux/rcupdate.h:897 (discriminator 1) ./include/net/sock.h:2189 (discriminator 1) net/core/sock.c:627 (discriminator 1))
[  843.353025][T13963]  ip6_sk_dst_lookup_flow (net/ipv6/ip6_output.c:1310 (discriminator 1))
[  843.353112][T13963]  udpv6_sendmsg (net/ipv6/udp.c:1708)
[  843.353202][T13963]  ? ip_select_ident_segs (net/ipv4/ip_output.c:934)
[  843.353296][T13963]  ? udpv6_splice_eof (net/ipv6/udp.c:1477)
[  843.353387][T13963]  ? move_addr_to_user (net/socket.c:306 (discriminator 1))
[  843.353481][T13963]  ? ____sys_recvmsg (net/socket.c:2849 (discriminator 3))
[  843.353574][T13963]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 4) kernel/locking/lockdep.c:3821 (discriminator 4) kernel/locking/lockdep.c:3876 (discriminator 4))
[  843.353662][T13963]  ? kernel_sendmsg (net/socket.c:2806)
[  843.353751][T13963]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  843.353837][T13963]  ? __might_fault (mm/memory.c:7129 (discriminator 4))
[  843.353926][T13963]  ? __sys_sendto (net/socket.c:721 (discriminator 1) net/socket.c:733 (discriminator 1) net/socket.c:2222 (discriminator 1))
[  843.354012][T13963]  __sys_sendto (net/socket.c:721 (discriminator 1) net/socket.c:733 (discriminator 1) net/socket.c:2222 (discriminator 1))
[  843.354104][T13963]  ? __ia32_sys_getpeername (net/socket.c:2189)
[  843.354195][T13963]  __x64_sys_sendto (net/socket.c:2229 (discriminator 1) net/socket.c:2225 (discriminator 1) net/socket.c:2225 (discriminator 1))
[  843.354284][T13963]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[  843.354377][T13963]  ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:108 arch/x86/entry/syscall_64.c:90)
[  843.354467][T13963]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))
[  843.354560][T13963]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)
[  843.354670][T13963] RIP: 0033:0x7fbd629acc5e
[  843.354763][T13963] Code: 4d 89 d8 e8 14 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 14 bd 00 00       	call   0xbd1c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 13 ff ff ff       	call   0xffffffffffffff4c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 13 ff ff ff       	call   0xffffffffffffff22
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[  843.355071][T13963] RSP: 002b:00007fff5e138690 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  843.355208][T13963] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fbd629acc5e
[  843.355342][T13963] RDX: 000000000000000c RSI: 00007fff5e1388c0 RDI: 0000000000000005
[  843.355476][T13963] RBP: 00007fff5e1386a0 R08: 00007fff5e138700 R09: 000000000000001c
[  843.355609][T13963] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff5e13cfc0


Finger prints:
ip6_rt_pcpu_alloc:ip6_pol_route:__fib6_rule_action:fib_rules_lookup:fib6_rule_lookup