======================================
| [  809.544168][T13332] eth1: renamed from tmp
| [  820.085486][T13495] eth1: renamed from tmp
| [  826.953816][T13571] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] SMP KASAN
| [  826.954059][T13571] KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
[  826.954361][T13571] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  826.954476][T13571] RIP: 0010:ip6_rt_pcpu_alloc (./include/net/net_namespace.h:419 (discriminator 10) ./include/linux/netdevice.h:2741 (discriminator 10) net/ipv6/route.c:1418 (discriminator 10))
[  826.954580][T13571] Code: fe ff 0f b7 ed 49 89 c7 e8 1e 02 3f 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 1e 02 3f 00       	call   0x3f022b
   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
[  826.954906][T13571] RSP: 0018:ffa0000005eb74d8 EFLAGS: 00010216
[  826.955023][T13571] RAX: dffffc0000000000 RBX: ff11000016ab322c RCX: 0000000000000000
[  826.955164][T13571] RDX: 0000000000000021 RSI: dffffc0000000000 RDI: 1fe22000029a4835
[  826.955296][T13571] RBP: 0000000000000008 R08: ff110000024aad30 R09: ff110000024aad30
[  826.955432][T13571] R10: 0000000000000002 R11: 0000000000000001 R12: ff11000016ab3200
[  826.955565][T13571] R13: 1ff4000000bd6e9d R14: ffa0000005eb75f8 R15: 0000000000000000
[  826.955699][T13571] FS:  00007fcec59f6740(0000) GS:ff110000b68d1000(0000) knlGS:0000000000000000
[  826.955854][T13571] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  826.955973][T13571] CR2: 0000564787cfd4d8 CR3: 000000000f43f002 CR4: 0000000000771ef0
[  826.956111][T13571] PKRU: 55555554
[  826.956179][T13571] Call Trace:
[  826.956248][T13571]  <TASK>
[  826.956295][T13571]  ? rt6_do_update_pmtu (net/ipv6/route.c:1407)
[  826.956386][T13571]  ? __rt6_find_exception_rcu.constprop.0 (net/ipv6/route.c:1612 (discriminator 2))
[  826.956500][T13571]  ip6_pol_route (net/ipv6/route.c:1467 net/ipv6/route.c:2318)
[  826.956587][T13571]  ? ip6_pol_route_lookup (net/ipv6/route.c:2267)
[  826.956674][T13571]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  826.956763][T13571]  ? ip6_pol_route_input (net/ipv6/route.c:2663)
[  826.956847][T13571]  __fib6_rule_action (net/ipv6/fib6_rules.c:239)
[  826.956939][T13571]  fib_rules_lookup (net/core/fib_rules.c:339)
[  826.957032][T13571]  ? fib_nl_dumprule (net/core/fib_rules.c:315)
[  826.957125][T13571]  ? l3mdev_update_flow (./include/linux/rcupdate.h:322 (discriminator 1) ./include/linux/rcupdate.h:881 (discriminator 1) net/l3mdev/l3mdev.c:301 (discriminator 1))
[  826.957212][T13571]  ? dev_get_by_index_rcu (net/core/dev.c:987 (discriminator 4))
[  826.957305][T13571]  ? ip6_pol_route_input (net/ipv6/route.c:2663)
[  826.957394][T13571]  fib6_rule_lookup (net/ipv6/fib6_rules.c:115)
[  826.957481][T13571]  ? fib6_lookup (net/ipv6/fib6_rules.c:99)
[  826.957569][T13571]  ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1))
[  826.957655][T13571]  ? ip6_pol_route_input (net/ipv6/route.c:2663)
[  826.957744][T13571]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1))
[  826.957833][T13571]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  826.957920][T13571]  ip6_route_output_flags (net/ipv6/route.c:2697 net/ipv6/route.c:2709)
[  826.958011][T13571]  ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1128 (discriminator 1))
[  826.958128][T13571]  ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260)
[  826.958218][T13571]  ? ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1255)
[  826.958327][T13571]  ? sk_dst_check (./include/linux/rcupdate.h:322 (discriminator 1) ./include/linux/rcupdate.h:881 (discriminator 1) ./include/net/sock.h:2198 (discriminator 1) net/core/sock.c:627 (discriminator 1))
[  826.958418][T13571]  ip6_sk_dst_lookup_flow (net/ipv6/ip6_output.c:1297 (discriminator 1))
[  826.958507][T13571]  udpv6_sendmsg (net/ipv6/udp.c:1709)
[  826.958591][T13571]  ? ip_frag_init (net/ipv4/ip_output.c:934)
[  826.958681][T13571]  ? udpv6_splice_eof (net/ipv6/udp.c:1478)
[  826.958768][T13571]  ? __might_fault (mm/memory.c:7217 (discriminator 4))
[  826.958857][T13571]  ? _copy_to_user (./arch/x86/include/asm/smap.h:47 ./arch/x86/include/asm/uaccess_64.h:121 ./arch/x86/include/asm/uaccess_64.h:147 ./include/linux/uaccess.h:206 lib/usercopy.c:26)
[  826.958948][T13571]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 (discriminator 1) kernel/rcu/update.c:380 (discriminator 1))
[  826.959035][T13571]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 4) kernel/locking/lockdep.c:3821 (discriminator 4) kernel/locking/lockdep.c:3876 (discriminator 4))
[  826.959132][T13571]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  826.959219][T13571]  ? __might_fault (mm/memory.c:7217 (discriminator 4))
[  826.959313][T13571]  ? __sys_sendto (net/socket.c:730 (discriminator 1) net/socket.c:742 (discriminator 1) net/socket.c:2206 (discriminator 1))
[  826.959400][T13571]  __sys_sendto (net/socket.c:730 (discriminator 1) net/socket.c:742 (discriminator 1) net/socket.c:2206 (discriminator 1))
[  826.959493][T13571]  ? __ia32_sys_getpeername (net/socket.c:2173)
[  826.959584][T13571]  __x64_sys_sendto (net/socket.c:2213 (discriminator 1) net/socket.c:2209 (discriminator 1) net/socket.c:2209 (discriminator 1))
[  826.959668][T13571]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 33))
[  826.959782][T13571]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[  826.959871][T13571]  ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:186 arch/x86/entry/syscall_64.c:90)
[  826.959956][T13571]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))
[  826.960047][T13571]  ? irq_exit_rcu (kernel/softirq.c:741 (discriminator 37))
[  826.960147][T13571]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  826.960257][T13571] RIP: 0033:0x7fcec5a67c5e
[  826.960353][T13571] Code: 4d 89 d8 e8 34 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 34 bd 00 00       	call   0xbd3c
   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
[  826.960668][T13571] RSP: 002b:00007ffe4097b9e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  826.960803][T13571] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fcec5a67c5e
[  826.960938][T13571] RDX: 000000000000000c RSI: 0000000000406612 RDI: 0000000000000005
[  826.961070][T13571] RBP: 00007ffe4097b9f0 R08: 00007ffe4097bfe0 R09: 000000000000001c
[  826.961206][T13571] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe4097bfe0


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