From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f79.google.com (mail-oo1-f79.google.com [209.85.161.79]) (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 5BD1D374735 for ; Wed, 20 May 2026 11:55:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779278138; cv=none; b=Vbo/TqunutSG4YB1PMdDeqH2nFreo0JsXr8vs6tU612fkb9udEUFkg7Sl4chLaN9Ti97ZdKNOkxvKyCj+Hs/3XHivc8PACuUJGgybbpBkH2jVUySr67C9tQLNANgBO+dQPML76VEsIj2ro6WoWBeSLgFNDbSlvArDZwb4yMJG4s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779278138; c=relaxed/simple; bh=hje88MKRm504VTdbSlvpEtbK/6SzAqPKYbeaWtiQV9I=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=cwDrDpoxyY95CxGA1xLMUta2LHgVh2Kx9J1uDPD1GrjC0QaPGQK2aZWrDzGUGFscq4iokqeshIjZmmdQ9+tr3I8pYuaAzBvOHjjbLE1aGEL9PPpBrkN522wqC4VczWHrFwO7n16wwG07srobW2kQzQMbaXj8Mn0c9BodvRS1UDk= 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=209.85.161.79 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-oo1-f79.google.com with SMTP id 006d021491bc7-69d0a1cb4a1so13298305eaf.0 for ; Wed, 20 May 2026 04:55:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779278136; x=1779882936; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8GZol9qQ+dw2DLZfx9vE3fAfJaHwkWrSoxo+SKKzVtw=; b=b13xm0SygsNSe3WCIO2FftjRN4cXZXsu91F5nRaoea+yi/F4G4mhnNUke0wHmLln/v LxlI+sSchBtPYSJRQ7JKe73knPXTbx7uVvfqIgUQJF9ywunctunPmFLpoUOpL+v5zGac BZygzEvLdgFEmIyskVY1v2ahk7Ufg9A9qaLeF+JgKt/Rpv+MIfNRbb2T9jrkot/SJhh8 H0tTdqaTwWAD/guG2FQw78SrygnQy70lWj4r1vG9n6tp/wH0/4U7yHgRKtip5QMqQAU+ 69eivYmqrphKvQ1H4DV7B6Q8cMEvMZAAbtAlKqjwQIzo8sWfaW4+Sl5qycTwu8ZSSfex gL1g== X-Forwarded-Encrypted: i=1; AFNElJ8GNnF6WtkLyjOt+bmSllFRd94SjDbJiu4lbOeJQQn1g3CaHsMNIa7Fa0FVF1dICnDFS+oTkc8=@vger.kernel.org X-Gm-Message-State: AOJu0YwSZ9QFrzyUxLryVHyVX/mmyMl4unYPN1TlYQP6QDp1D6Kr2Jda Tv+ZFqjQIe6SfGjSLYds6rnj6P1XfclvynJZ0rFX416ntS4CaM1OVsb4BJrd6hgux6/JTCLx91D biPSYIhEDPX86wYMwkGCwGfTk1r4AsgIDESLqldOqP7h7AItNeUjg7xJM+1g= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f07:b0:67e:16b4:aa0d with SMTP id 006d021491bc7-69c9437c154mr13458890eaf.30.1779278136388; Wed, 20 May 2026 04:55:36 -0700 (PDT) Date: Wed, 20 May 2026 04:55:36 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a0da138.170a0220.3cbd30.0141.GAE@google.com> Subject: [syzbot] [mptcp?] WARNING in mptcp_pm_alloc_anno_list (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: ab5fce87a778 Merge tag 'perf-tools-fixes-for-v7.1-2026-05-.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=175fcca6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb5b551cf65fa040 dashboard link: https://syzkaller.appspot.com/bug?extid=55c2a5c871441261ed14 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e36518c61bd7/disk-ab5fce87.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cd934c0c8950/vmlinux-ab5fce87.xz kernel image: https://storage.googleapis.com/syzbot-assets/88cf18661142/bzImage-ab5fce87.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+55c2a5c871441261ed14@syzkaller.appspotmail.com ------------[ cut here ]------------ mptcp_pm_is_kernel(msk) WARNING: net/mptcp/pm.c:436 at mptcp_pm_alloc_anno_list+0x408/0x4d0 net/mptcp/pm.c:436, CPU#1: kworker/1:6/5792 Modules linked in: CPU: 1 UID: 0 PID: 5792 Comm: kworker/1:6 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events mptcp_worker RIP: 0010:mptcp_pm_alloc_anno_list+0x408/0x4d0 net/mptcp/pm.c:436 Code: 8d 7b 30 49 c7 c0 00 6f 64 9b 48 c7 c1 40 f5 28 8d 31 d2 48 c7 c6 b0 43 77 8b e8 c3 b3 7c f6 e9 c6 fc ff ff e8 c9 5b 91 f6 90 <0f> 0b 90 31 db e9 09 fd ff ff 48 c7 c7 c4 39 d8 90 e8 22 27 fe f6 RSP: 0018:ffffc90004187818 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888079295f00 RCX: ffffffff8b772ecf RDX: ffff888029de1ec0 RSI: ffffffff8b773217 RDI: ffff888029de1ec0 RBP: ffff88807e593100 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88807e593100 R15: ffff88806a3a5e80 FS: 0000000000000000(0000) GS:ffff88812446d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000035e030 CR3: 0000000068e39000 CR4: 0000000000350ef0 Call Trace: mptcp_pm_create_subflow_or_signal_addr+0xa7a/0x18a0 net/mptcp/pm_kernel.c:373 mptcp_pm_nl_subflow_established net/mptcp/pm_kernel.c:443 [inline] __mptcp_pm_kernel_worker+0xe5/0x1f0 net/mptcp/pm_kernel.c:1573 mptcp_pm_worker+0x12b/0x320 net/mptcp/pm.c:1069 mptcp_worker+0x15d/0x1420 net/mptcp/protocol.c:2976 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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