nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4655 at net/netfilter/nf_queue.c:331 nf_reinject+0x280/0x860 net/netfilter/nf_queue.c:-1 Modules linked in: CPU: 0 PID: 4655 Comm: syz.1.103 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:nf_reinject+0x280/0x860 net/netfilter/nf_queue.c:331 Code: 3a e8 64 89 36 f9 89 c3 31 ff 89 c6 e8 e9 9e 4b f9 85 db 74 61 e8 80 9b 4b f9 e9 21 01 00 00 e8 76 9b 4b f9 0f 0b 4c 8b 3c 24 <0f> 0b e9 80 05 00 00 e8 64 9b 4b f9 e9 05 01 00 00 e8 5a 9b 4b f9 RSP: 0018:ffffc9000308f070 EFLAGS: 00010283 RAX: ffffffff882d8a49 RBX: 0000000000000006 RCX: 0000000000080000 RDX: ffffc90003d43000 RSI: 0000000000000bbe RDI: 0000000000000bbf RBP: 0000000000000000 R08: ffff88802941d940 R09: 0000000000000003 R10: 000000000000000a R11: 0000000000000002 R12: ffff88802ce00c00 R13: ffff88801c71a938 R14: ffff88802ce13600 R15: ffff88802ce13600 FS: 00007f6cc9c586c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c313e3b CR3: 000000005678d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nfqnl_reinject net/netfilter/nfnetlink_queue.c:243 [inline] nfqnl_flush net/netfilter/nfnetlink_queue.c:256 [inline] nfqnl_nf_hook_drop+0x1e9/0x2b0 net/netfilter/nfnetlink_queue.c:1031 nf_queue_nf_hook_drop+0x102/0x1f0 net/netfilter/nf_queue.c:140 __nf_unregister_net_hook+0x47b/0x610 net/netfilter/core.c:483 __nf_tables_unregister_hook net/netfilter/nf_tables_api.c:363 [inline] nf_tables_unregister_hook net/netfilter/nf_tables_api.c:370 [inline] nf_tables_commit+0x4edf/0x7730 net/netfilter/nf_tables_api.c:9601 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:564 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x1aac/0x2450 net/netfilter/nfnetlink.c:652 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2500 __sys_sendmsg net/socket.c:2529 [inline] __do_sys_sendmsg net/socket.c:2538 [inline] __se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6ccba01559 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:00007f6cc9c58028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6ccbc87fa0 RCX: 00007f6ccba01559 RDX: 0000000024040008 RSI: 0000200000000b40 RDI: 0000000000000006 RBP: 00007f6ccba98b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6ccbc88038 R14: 00007f6ccbc87fa0 R15: 00007ffc462af828