------------[ cut here ]------------
kernel BUG at net/netfilter/nf_conntrack_core.c:570!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7218 Comm: syz.1.1007 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:nf_ct_del_from_dying_or_unconfirmed_list net/netfilter/nf_conntrack_core.c:570 [inline]
RIP: 0010:__nf_conntrack_confirm+0x109d/0x10a0 net/netfilter/nf_conntrack_core.c:1207
Code: fc ff ff e8 95 50 54 f9 48 c7 c7 38 51 85 8d 48 c7 c6 a0 c8 24 8b 48 8b 54 24 08 e8 9d 72 db fb e9 fa f1 ff ff e8 73 50 54 f9 <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 89 fb 48 bd 00 00 00 00
RSP: 0018:ffffc90000007820 EFLAGS: 00010246
RAX: ffffffff8824f87d RBX: ffffe8ffffc25fe0 RCX: ffff88802855d940
RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffffc900000077a0
RBP: ffff88805f5ca800 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000ef4 R12: 000000000002972d
R13: 0000000000000000 R14: ffff88805f5ca858 R15: 0000000000000000
FS:  0000555555be7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002640 CR3: 0000000075d4a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:62 [inline]
 nf_confirm+0x381/0x4b0 net/netfilter/nf_conntrack_proto.c:154
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xb9/0x200 net/netfilter/core.c:584
 nf_hook include/linux/netfilter.h:257 [inline]
 NF_HOOK+0x1f2/0x390 include/linux/netfilter.h:300
 NF_HOOK+0x303/0x390 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5551 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5665
 process_backlog+0x370/0x790 net/core/dev.c:6542
 __napi_poll+0xc0/0x430 net/core/dev.c:7101
 napi_poll net/core/dev.c:7168 [inline]
 net_rx_action+0x4d4/0xa10 net/core/dev.c:7258
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 do_softirq+0x142/0x210 kernel/softirq.c:477
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:401
 rcu_read_unlock_bh include/linux/rcupdate.h:810 [inline]
 ip_finish_output2+0xd50/0x10a0 net/ipv4/ip_output.c:229
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip_output+0x2c0/0x3e0 net/ipv4/ip_output.c:434
 dst_output include/net/dst.h:452 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x11c1/0x1c00 net/ipv4/ip_output.c:538
 __tcp_transmit_skb+0x1d11/0x3200 net/ipv4/tcp_output.c:1404
 tcp_fin+0x10c/0x4d0 net/ipv4/tcp_input.c:4483
 tcp_data_queue+0x791/0x56f0 net/ipv4/tcp_input.c:5147
 tcp_rcv_state_process+0x27bc/0x4190 net/ipv4/tcp_input.c:6731
 tcp_v4_do_rcv+0x680/0x9b0 net/ipv4/tcp_ipv4.c:1753
 sk_backlog_rcv include/net/sock.h:1080 [inline]
 __release_sock+0x1e1/0x450 net/core/sock.c:2731
 __tcp_close+0x6ec/0xfa0 net/ipv4/tcp.c:2849
 tcp_close+0x24/0x110 net/ipv4/tcp.c:2926
 inet_release+0x139/0x180 net/ipv4/af_inet.c:432
 __sock_release net/socket.c:651 [inline]
 sock_close+0xd5/0x240 net/socket.c:1345
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0b9bc72e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9d44d678 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffd9d44d760 RCX: 00007f0b9bc72e59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000022664 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31820000 R11: 0000000000000246 R12: 00007ffd9d44d7a0
R13: 00007f0b9beebfac R14: 00000000000226a4 R15: 00007f0b9beebfa0
 </TASK>
Modules linked in:
---[ end trace a69b89d8834c797b ]---
RIP: 0010:nf_ct_del_from_dying_or_unconfirmed_list net/netfilter/nf_conntrack_core.c:570 [inline]
RIP: 0010:__nf_conntrack_confirm+0x109d/0x10a0 net/netfilter/nf_conntrack_core.c:1207
Code: fc ff ff e8 95 50 54 f9 48 c7 c7 38 51 85 8d 48 c7 c6 a0 c8 24 8b 48 8b 54 24 08 e8 9d 72 db fb e9 fa f1 ff ff e8 73 50 54 f9 <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 89 fb 48 bd 00 00 00 00
RSP: 0018:ffffc90000007820 EFLAGS: 00010246
RAX: ffffffff8824f87d RBX: ffffe8ffffc25fe0 RCX: ffff88802855d940
RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffffc900000077a0
RBP: ffff88805f5ca800 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000ef4 R12: 000000000002972d
R13: 0000000000000000 R14: ffff88805f5ca858 R15: 0000000000000000
FS:  0000555555be7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002640 CR3: 0000000075d4a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400