======================================
| [  116.050881][ T1787] gre: GRE over IPv4 demultiplexer driver
| [  116.488466][ T1810] ip_gre: GRE over IPv4 tunneling driver
| [  117.080752][    T9] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN
| [  117.080972][    T9] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
[  117.081237][    T9] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  117.081338][    T9] Workqueue: mld mld_ifc_work
[  117.081430][    T9] RIP: 0010:mroute6_is_socket (net/ipv6/ip6mr.c:1686 (discriminator 4))
[  117.081527][    T9] Code: df 48 89 f9 48 c1 e9 03 80 3c 11 00 75 2f 48 8b 80 e8 10 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 78 30 48 89 f9 48 c1 e9 03 <80> 3c 11 00 75 1c 48 83 78 30 00 0f 95 c0 48 83 c4 08 c3 48 89 04
All code
========
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	f9                   	stc
   4:	48 c1 e9 03          	shr    $0x3,%rcx
   8:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)
   c:	75 2f                	jne    0x3d
   e:	48 8b 80 e8 10 00 00 	mov    0x10e8(%rax),%rax
  15:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  1c:	fc ff df 
  1f:	48 8d 78 30          	lea    0x30(%rax),%rdi
  23:	48 89 f9             	mov    %rdi,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
  2a:*	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)		<-- trapping instruction
  2e:	75 1c                	jne    0x4c
  30:	48 83 78 30 00       	cmpq   $0x0,0x30(%rax)
  35:	0f 95 c0             	setne  %al
  38:	48 83 c4 08          	add    $0x8,%rsp
  3c:	c3                   	ret
  3d:	48                   	rex.W
  3e:	89                   	.byte 0x89
  3f:	04                   	.byte 0x4

Code starting with the faulting instruction
===========================================
   0:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)
   4:	75 1c                	jne    0x22
   6:	48 83 78 30 00       	cmpq   $0x0,0x30(%rax)
   b:	0f 95 c0             	setne  %al
   e:	48 83 c4 08          	add    $0x8,%rsp
  12:	c3                   	ret
  13:	48                   	rex.W
  14:	89                   	.byte 0x89
  15:	04                   	.byte 0x4
[  117.081811][    T9] RSP: 0018:ffa00000000978b0 EFLAGS: 00010216
[  117.081913][    T9] RAX: 0000000000000000 RBX: ff1100000e30ac80 RCX: 0000000000000006
[  117.082034][    T9] RDX: dffffc0000000000 RSI: ff1100000e30ac80 RDI: 0000000000000030
[  117.082155][    T9] RBP: ff1100000b6fb000 R08: ffffffff85bb8550 R09: 1fe2200001ea3e85
[  117.082277][    T9] R10: ff1100001014a058 R11: ff1100000a6140b0 R12: 1ff4000000012f20
[  117.082385][    T9] R13: ff1100000a614000 R14: ff11000014eea000 R15: ff1100001014a040
[  117.082496][    T9] FS:  0000000000000000(0000) GS:ff110000e34e4000(0000) knlGS:0000000000000000
[  117.082633][    T9] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  117.082728][    T9] CR2: 00007fd598179298 CR3: 000000000b413003 CR4: 0000000000771ef0
[  117.082839][    T9] PKRU: 55555554
[  117.082894][    T9] Call Trace:
[  117.082954][    T9]  <TASK>
[  117.082992][    T9]  ip6_finish_output2 (net/ipv6/ip6_output.c:84 (discriminator 3))
[  117.083068][    T9]  ? ip6_xmit (net/ipv6/ip6_output.c:61)
[  117.083138][    T9]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  117.083213][    T9]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  117.083285][    T9]  ? ip6_mtu (./include/linux/rcupdate.h:322 (discriminator 2) ./include/linux/rcupdate.h:881 (discriminator 2) ./include/net/ip6_route.h:382 (discriminator 2) net/ipv6/route.c:3281 (discriminator 2))
[  117.083341][    T9]  ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)
[  117.083416][    T9]  ip6_output (./include/linux/netfilter.h:307 net/ipv6/ip6_output.c:246)
[  117.083471][    T9]  ? ip6_finish_output (net/ipv6/ip6_output.c:227)
[  117.083549][    T9]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  117.083620][    T9]  ? xfrm_bundle_lookup.constprop.0 (net/xfrm/xfrm_policy.c:3177)
[  117.083708][    T9]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  117.083779][    T9]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  117.083851][    T9]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  117.083922][    T9]  ? icmp6_dst_alloc (net/ipv6/route.c:3357 (discriminator 1))
[  117.083994][    T9]  mld_sendpack (./include/linux/netfilter.h:319 ./include/linux/netfilter.h:312 net/ipv6/mcast.c:1855)
[  117.084068][    T9]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  117.084139][    T9]  ? nf_hook.constprop.0 (net/ipv4/ip_forward.c:66)
[  117.084212][    T9]  ? mld_send_cr (net/ipv6/mcast.c:2131 (discriminator 14))
[  117.084284][    T9]  mld_ifc_work (net/ipv6/mcast.c:2695)
[  117.084354][    T9]  ? process_one_work (kernel/workqueue.c:3252 (discriminator 2))
[  117.084426][    T9]  process_one_work (kernel/workqueue.c:3281)
[  117.084498][    T9]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3177)
[  117.084579][    T9]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  117.084651][    T9]  worker_thread (kernel/workqueue.c:3353 (discriminator 5) kernel/workqueue.c:3440 (discriminator 5))
[  117.084728][    T9]  ? rescuer_thread (kernel/workqueue.c:3386)
[  117.084800][    T9]  kthread (kernel/kthread.c:436)
[  117.084854][    T9]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 24))
[  117.084944][    T9]  ? kthread_affine_node (kernel/kthread.c:381)
[  117.085017][    T9]  ret_from_fork (arch/x86/kernel/process.c:164)
[  117.085091][    T9]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  117.085181][    T9]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 (discriminator 1) arch/x86/kernel/process_64.c:377 (discriminator 1) arch/x86/kernel/process_64.c:665 (discriminator 1))
[  117.085255][    T9]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
mroute6_is_socket:ip6_finish_output2:ip6_finish_output:ip6_output:mld_sendpack