BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
#PF error: [INSTR]
PGD 98e29067 P4D 98e29067 PUD 98e2a067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc4+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8880a98dfa28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880972f6ca4 RCX: ffffffff8605825a
RDX: 1ffff11012e5ed99 RSI: ffffffff86058268 RDI: ffff8880a11030c0
RBP: ffff8880a98dfa58 R08: ffff8880a98d0440 R09: 0000000000000002
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff8880a11030c0
R13: 0000000000000000 R14: ffff8880a1103118 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000098e28000 CR4: 00000000001426e0
DR0: 000000000000b8c4 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272
 __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973
 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
 process_backlog+0x206/0x750 net/core/dev.c:5923
 napi_poll net/core/dev.c:6346 [inline]
 net_rx_action+0x4fa/0x1070 net/core/dev.c:6412
 __do_softirq+0x266/0x95a kernel/softirq.c:292
 run_ksoftirqd kernel/softirq.c:654 [inline]
 run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646
 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: 0000000000000000
---[ end trace 003f1ff097f6b9e2 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8880a98dfa28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880972f6ca4 RCX: ffffffff8605825a
RDX: 1ffff11012e5ed99 RSI: ffffffff86058268 RDI: ffff8880a11030c0
------------[ cut here ]------------
RBP: ffff8880a98dfa58 R08: ffff8880a98d0440 R09: 0000000000000002
downgrading a read lock
WARNING: CPU: 0 PID: 10174 at kernel/locking/lockdep.c:3553 __lock_downgrade kernel/locking/lockdep.c:3553 [inline]
WARNING: CPU: 0 PID: 10174 at kernel/locking/lockdep.c:3553 lock_downgrade+0x478/0x810 kernel/locking/lockdep.c:3816
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff8880a11030c0