From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D42E2D8768 for ; Tue, 24 Jun 2025 18:18:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750789114; cv=none; b=uEZup0X8bbLn3Um/vJ4fsdoOpzOSQSy6g+H9W35B+F7WiWRwXcqdHINhvidHk8EmZ7oaRHi0EzUYKPDxgzYALi895HipJqI45280JeX8/DF69DFNKD/RTIj9xh3YhFO7GxjQZ6py0qAmR/75XxfpFgN2fVBbqwybb8E2pZTL/TM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750789114; c=relaxed/simple; bh=b3gqybE5Pb4fbf+NG8nF+cHOxnanQ96YrphONGlLhb8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QDl+haCBDokkS5HHE8QYW3QpCCSocIbOxivLQyuI4Um6g8RlSktv1bdiBVfsy6LpyyLfrDsDfgFlJzCmUFLImHAMS06klwv1UtqEIWoG8vvIOQY+qgD99r8YMIp/EVtQkkxocJXxdr0R/R9n10X4pRwYLb0akqaOa3dsvijgnmA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.205 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f205.google.com with SMTP id e9e14a558f8ab-3ddba1b53e8so10528675ab.1 for ; Tue, 24 Jun 2025 11:18:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750789112; x=1751393912; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=7nbEx6aMVKqdWvyMJYQZTfplcow4MaQFasYOV9mpc5Q=; b=Vebbp8qrmXPijh7vHhyXi6keY9e0/pmqloiia/QTCt4W1gPSI0MEI9agv+cOhJS5OX IPi1nbmXnsf/WbCxgRvlN1DfQGVrefSBKXnMyYPjZ+WQFD31yAYCz0HSEPUU3oKgFN4J mAX1FOzr5d8CJfKsuwc6CxDqMhDXHqG96IYOWYxbYdxtRXIdDwoN9BOdRbC9pnz7Eoi/ +oPj3T9T6m+V9Y34275ALzF8WQs+OG22mM9rLrR4pLgiz1AkegfrV+cCflmbpgoQf15N J9bzZW26ivo54Bi29M69MZmoUNHClUUkjvP+SkuzIej9DGWPI0NN27EhXMYECx8avKDp PNNA== X-Forwarded-Encrypted: i=1; AJvYcCXRQRbv8F8iIN4b7OBGx40Fjunvs74oF+OihCiki3cCmGtanLB7S3Gh1D8CgBU07oB6kV3j2LaSModbPDo=@vger.kernel.org X-Gm-Message-State: AOJu0Yw6Xd/En3VjuXgDV2hp8HHrv56/DaDm5tcGkiQSgk5O1/t6wXt2 kauCI8U/osmlRVnExW8aigcJQmwyTZL4vjbgq6SHq8RIwwfqJVVcOxDzqX5Dtd0PnzXy1OqkzSd //LGcXJSHmOjxNNU/9eSxNdJVqx4AhRqLvmtjq1JuiUpxfwase6puL+fVpAY= X-Google-Smtp-Source: AGHT+IEKpUzUpSGavgSOnfmZjsCqKhAYX//2LVI3qo9n5HmjNzxIxrIBnPG8//vvvhzAPnERsu6qLWjtRY1G8q5OkwK8qpUdhg7q Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c2b:b0:3dd:c4ed:39c0 with SMTP id e9e14a558f8ab-3df328e0374mr964335ab.1.1750789111711; Tue, 24 Jun 2025 11:18:31 -0700 (PDT) Date: Tue, 24 Jun 2025 11:18:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <685aebf7.a00a0220.2e5631.008d.GAE@google.com> Subject: [syzbot] [mptcp?] WARNING in __mark_subflow_endp_available (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, geliang@kernel.org, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martineau@kernel.org, matttbe@kernel.org, mptcp@lists.linux.dev, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 75f5f23f8787 Merge tag 'block-6.16-20250619' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=140f8182580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4130f4d8a06c3e71 dashboard link: https://syzkaller.appspot.com/bug?extid=c6e2db6fd15f31126b7a compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-75f5f23f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7979df97154f/vmlinux-75f5f23f.xz kernel image: https://storage.googleapis.com/syzbot-assets/010807ef6fc8/bzImage-75f5f23f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c6e2db6fd15f31126b7a@syzkaller.appspotmail.com netlink: 8 bytes leftover after parsing attributes in process `syz.3.1789'. netlink: 8 bytes leftover after parsing attributes in process `syz.3.1789'. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 12059 at net/mptcp/pm_kernel.c:880 __mark_subflow_endp_available net/mptcp/pm_kernel.c:880 [inline] WARNING: CPU: 0 PID: 12059 at net/mptcp/pm_kernel.c:880 __mark_subflow_endp_available+0x12e/0x140 net/mptcp/pm_kernel.c:876 Modules linked in: CPU: 0 UID: 0 PID: 12059 Comm: syz.3.1789 Not tainted 6.16.0-rc2-syzkaller-00231-g75f5f23f8787 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_kernel.c:880 [inline] RIP: 0010:__mark_subflow_endp_available+0x12e/0x140 net/mptcp/pm_kernel.c:876 Code: 48 0f ab 9d 88 0a 00 00 5b 5d 41 5c 41 5d e9 d9 f8 4c f6 e8 64 d0 b3 f6 eb ca e8 5d d0 b3 f6 e9 60 ff ff ff e8 c3 f8 4c f6 90 <0f> 0b 90 e9 78 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 RSP: 0018:ffffc900036373d8 EFLAGS: 00010283 RAX: 00000000000057d6 RBX: 0000000000000000 RCX: ffffc9000d761000 RDX: 0000000000080000 RSI: ffffffff8b6f236d RDI: 0000000000000001 RBP: ffff888025d08b80 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888025d09608 R13: ffff888025d095b8 R14: ffff8880653cde80 R15: 0000000000000000 FS: 00007f1bc288a6c0(0000) GS:ffff8880d6753000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1bc2888fb8 CR3: 0000000064977000 CR4: 0000000000352ef0 DR0: 0000000000000007 DR1: 000000000000009b DR2: 00040000ffffffff DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mptcp_nl_remove_subflow_and_signal_addr net/mptcp/pm_kernel.c:915 [inline] mptcp_pm_nl_del_addr_doit+0xaf4/0xed0 net/mptcp/pm_kernel.c:1013 genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmsg+0x16d/0x220 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1bc198e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1bc288a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1bc1bb6080 RCX: 00007f1bc198e929 RDX: 000000002000c094 RSI: 0000200000000000 RDI: 0000000000000006 RBP: 00007f1bc1a10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1bc1bb6080 R15: 00007ffc06c0d828 --- 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@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup