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: 7967 Comm: syz.4.6692 Not tainted 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:nft_fib6_eval+0x7cd/0xc20 net/ipv6/netfilter/nft_fib_ipv6.c:-1
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 ed 25 f1 f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 d4 25 f1 f7 48 8b 3b 48 8b 5c 24
RSP: 0018:ffffc9000eb3f020 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff88802d935a00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000eb3f1f0 R08: ffffffff8fa10bf7 R09: 1ffffffff1f4217e
R10: dffffc0000000000 R11: fffffbfff1f4217f R12: dffffc0000000000
R13: ffffc9000eb3f110 R14: ffff8880256b2140 R15: ffff8880256b21a0
FS:  0000000000000000(0000) GS:ffff888125d52000(0063) knlGS:00000000f510eb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003061bff8 CR3: 000000003a96c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
 nft_do_chain+0x40c/0x1920 net/netfilter/nf_tables_core.c:285
 nft_do_chain_inet+0x25d/0x340 net/netfilter/nft_chain_filter.c:161
 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
 nf_hook_slow+0xc2/0x220 net/netfilter/core.c:623
 nf_hook include/linux/netfilter.h:272 [inline]
 NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:315
 __netif_receive_skb_one_core net/core/dev.c:5977 [inline]
 __netif_receive_skb+0xd3/0x380 net/core/dev.c:6090
 netif_receive_skb_internal net/core/dev.c:6176 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6235
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x298e/0x3ce0 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x548/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf711e539
Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f510e520 EFLAGS: 00000206 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 0000000080000240
RDX: 0000000000000086 RSI: 00000000f7482ff4 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nft_fib6_eval+0x7cd/0xc20 net/ipv6/netfilter/nft_fib_ipv6.c:-1
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 ed 25 f1 f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 d4 25 f1 f7 48 8b 3b 48 8b 5c 24
RSP: 0018:ffffc9000eb3f020 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff88802d935a00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000eb3f1f0 R08: ffffffff8fa10bf7 R09: 1ffffffff1f4217e
R10: dffffc0000000000 R11: fffffbfff1f4217f R12: dffffc0000000000
R13: ffffc9000eb3f110 R14: ffff8880256b2140 R15: ffff8880256b21a0
FS:  0000000000000000(0000) GS:ffff888125d52000(0063) knlGS:00000000f510eb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003061bff8 CR3: 000000003a96c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	4c 89 f3             	mov    %r14,%rbx
   3:	48 81 c3 d8 00 00 00 	add    $0xd8,%rbx
   a:	48 89 d8             	mov    %rbx,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  16:	74 08                	je     0x20
  18:	48 89 df             	mov    %rbx,%rdi
  1b:	e8 ed 25 f1 f7       	call   0xf7f1260d
  20:	48 8b 1b             	mov    (%rbx),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 d4 25 f1 f7       	call   0xf7f1260d
  39:	48 8b 3b             	mov    (%rbx),%rdi
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	5c                   	pop    %rsp
  3f:	24                   	.byte 0x24