Hello, syzbot found the following issue on: HEAD commit: 6465e260f487 Linux 6.6-rc3 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1376e3bc680000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d7d7928f78936aa dashboard link: https://syzkaller.appspot.com/bug?extid=de4025c006ec68ac56fc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f218da680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=149ff8c6680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/563852357aa6/disk-6465e260.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/df22793fe953/vmlinux-6465e260.xz kernel image: https://storage.googleapis.com/syzbot-assets/84c2aad43ae3/bzImage-6465e260.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+de4025c006ec68ac56fc@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ hook not found, pf 2 num 1 WARNING: CPU: 1 PID: 5062 at net/netfilter/core.c:517 __nf_unregister_net_hook+0x1de/0x670 net/netfilter/core.c:517 Modules linked in: CPU: 1 PID: 5062 Comm: syz-executor417 Not tainted 6.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:__nf_unregister_net_hook+0x1de/0x670 net/netfilter/core.c:517 Code: 14 02 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7a 04 00 00 8b 53 1c 48 c7 c7 c0 d4 a8 8b 8b 74 24 04 e8 b2 ce dc f8 <0f> 0b e9 ec 00 00 00 e8 46 a5 16 f9 48 89 e8 48 c1 e0 04 49 8d 7c RSP: 0018:ffffc9000355f2b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff8880218dde00 RCX: 0000000000000000 RDX: ffff888019aee000 RSI: ffffffff814cf016 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff92611690 R13: ffff888016fff020 R14: ffff888016fff000 R15: ffff8880218dde1c FS: 00007f76ca1526c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f76ca1e86b8 CR3: 0000000020292000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> nf_unregister_net_hook+0xd5/0x110 net/netfilter/core.c:539 __nf_tables_unregister_hook net/netfilter/nf_tables_api.c:361 [inline] __nf_tables_unregister_hook+0x1a0/0x220 net/netfilter/nf_tables_api.c:340 nf_tables_unregister_hook net/netfilter/nf_tables_api.c:368 [inline] nf_tables_commit+0x410f/0x59f0 net/netfilter/nf_tables_api.c:9992 nfnetlink_rcv_batch+0xf36/0x2500 net/netfilter/nfnetlink.c:569 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:639 [inline] nfnetlink_rcv+0x3bf/0x430 net/netfilter/nfnetlink.c:657 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:753 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2541 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2595 __sys_sendmsg+0x117/0x1e0 net/socket.c:2624 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f76ca192059 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f76ca152208 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f76ca21c3e8 RCX: 00007f76ca192059 RDX: 0000000000000000 RSI: 000000002000c2c0 RDI: 0000000000000004 RBP: 00007f76ca21c3e0 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000a00 R11: 0000000000000246 R12: 00007f76ca1e917c R13: 0000000000000001 R14: 0000000000000008 R15: 0200000000000000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
