Hello, syzbot found the following issue on: HEAD commit: f7b88d9ae91e Merge tag 'linux-can-next-for-5.19-20220516' .. git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=14f791aef00000 kernel config: https://syzkaller.appspot.com/x/.config?x=c05eee2efc702eed dashboard link: https://syzkaller.appspot.com/bug?extid=afd2d80e495f96049571 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13ba8ae9f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13ef1295f00000 The issue was bisected to: commit 2794cdb0b97bfe62d25c996c8afe4832207e78bc Author: Florian Westphal <fw@xxxxxxxxx> Date: Mon Apr 25 13:15:41 2022 +0000 netfilter: nfnetlink: allow to detect if ctnetlink listeners exist bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13cb5bbef00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=102b5bbef00000 console output: https://syzkaller.appspot.com/x/log.txt?x=17cb5bbef00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+afd2d80e495f96049571@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 2794cdb0b97b ("netfilter: nfnetlink: allow to detect if ctnetlink listeners exist") ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3600 at net/netfilter/nfnetlink.c:703 nfnetlink_unbind net/netfilter/nfnetlink.c:703 [inline] WARNING: CPU: 0 PID: 3600 at net/netfilter/nfnetlink.c:703 nfnetlink_unbind+0x357/0x3b0 net/netfilter/nfnetlink.c:694 Modules linked in: CPU: 0 PID: 3600 Comm: syz-executor186 Not tainted 5.18.0-rc6-syzkaller-01545-gf7b88d9ae91e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nfnetlink_unbind net/netfilter/nfnetlink.c:703 [inline] RIP: 0010:nfnetlink_unbind+0x357/0x3b0 net/netfilter/nfnetlink.c:694 Code: f9 48 c7 c2 00 0d d8 8a be b7 02 00 00 48 c7 c7 60 0d d8 8a c6 05 91 3d 14 06 01 e8 38 36 9b 01 e9 6e fd ff ff e8 09 66 e8 f9 <0f> 0b 41 c7 04 24 ff ff ff ff e9 9d fe ff ff e8 a5 7a 34 fa e9 dd RSP: 0018:ffffc90002e8fcf8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801bd11d80 RSI: ffffffff8790d397 RDI: 0000000000000003 RBP: ffffffff90947640 R08: 0000000000000000 R09: ffffc90002e8fc37 R10: ffffffff8790d1e8 R11: 0000000000000001 R12: ffff8880230b4d20 R13: ffff88814c73b000 R14: ffff888016aab518 R15: ffff888016aab000 FS: 0000555557248300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001280 CR3: 000000001f866000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> netlink_setsockopt+0x932/0xda0 net/netlink/af_netlink.c:1661 __sys_setsockopt+0x2db/0x6a0 net/socket.c:2227 __do_sys_setsockopt net/socket.c:2238 [inline] __se_sys_setsockopt net/socket.c:2235 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2235 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f37f8e5faf9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffef051fc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f37f8e5faf9 RDX: 0000000000000002 RSI: 000000000000010e RDI: 0000000000000003 RBP: 00007f37f8e23ca0 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020001280 R11: 0000000000000246 R12: 00007f37f8e23d30 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
