Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 7996 Comm: syz.0.521 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:nft_fib6_eval+0x7cd/0xc20
Code: 4c 89 f3 48 81 c3 d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 5d 77 dd f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 44 77 dd f7 48 8b 3b 48 8b 5c 24
RSP: 0018:ffffc90003ddf000 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff8881073c3980 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ddf1d0 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: dffffc0000000000
R13: ffffc90003ddf0f0 R14: ffff88811d75ea80 R15: ffff88811d75eae0
FS:  00007fbe633646c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000142 CR3: 000000003670a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 nft_do_chain+0x40c/0x1920
 nft_do_chain_inet+0x25d/0x340
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x206/0x3a0
 __netif_receive_skb+0xd3/0x380
 netif_receive_skb+0x1cb/0x790
 tun_rx_batched+0x1b9/0x730
 tun_get_user+0x2aa2/0x3e20
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe6258d69f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007fbe63364000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbe627b5fa0 RCX: 00007fbe6258d69f
RDX: 000000000000007e RSI: 0000200000000140 RDI: 00000000000000c8
RBP: 00007fbe62611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000007e R11: 0000000000000293 R12: 0000000000000000
R13: 00007fbe627b6038 R14: 00007fbe627b5fa0 R15: 00007ffcdfa7f3e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nft_fib6_eval+0x7cd/0xc20
Code: 4c 89 f3 48 81 c3 d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 5d 77 dd f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 44 77 dd f7 48 8b 3b 48 8b 5c 24
RSP: 0018:ffffc90003ddf000 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff8881073c3980 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ddf1d0 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: dffffc0000000000
R13: ffffc90003ddf0f0 R14: ffff88811d75ea80 R15: ffff88811d75eae0
FS:  00007fbe633646c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000142 CR3: 000000003670a000 CR4: 00000000000006f0
