From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f71.google.com (mail-ot1-f71.google.com [209.85.210.71]) (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 44990320CAD for ; Thu, 12 Mar 2026 02:14:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773281671; cv=none; b=d+hEPI97ccDunm6wt+3kdj/dRaaYAPJN04FO5tOfksZUuWbDSZpKVqokAX0bIbwoFgvc5xfzAnPe3zKRyroYgrjN2mTrKb68Knlkha8eMgIZjbJ0MdOqz0no9EMaLqmN6hYQRH/pPLnlqMcdJCDdJPBzSqDADi5R5YUvMbTF3lY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773281671; c=relaxed/simple; bh=iBiLAC4oK/v6IvNt12XprCZuSZo8vQ/vzCm0xpABvxw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=czH1WFtOhImceNo1/AYi/yREAELqgJhKSF9ATLzNtWtE/zjkgWroKJmbThT95iq6yPvw/9geZPMf+HpuFijZaYnpiFiF5zzwghmoiuKErnXscoeN/l8ma1tgEMYKGVdrbf/7WiC6Hf3ECCWQKqzpQnuZogXdjlm/JpEBqFf0FjI= 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=209.85.210.71 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-ot1-f71.google.com with SMTP id 46e09a7af769-7d74ab502b0so3924639a34.1 for ; Wed, 11 Mar 2026 19:14:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773281669; x=1773886469; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9yUdTLorfMfl6e+pVf9RnpCNvkB22mXGi6n1wgyWYyE=; b=L7Iy0UW9s+QW44ASCgczfs6XDUO+EU3JmRIwp7qnYWvsVUjTPwFQshnxdvwTAfkSOf FayGUSWqWLhJxM/lmo0IUVmIsBvd9XyCSnL5uaQX6AwO/al5nc8RrnnLUVJBgynl/5mQ XX2TcwvY6eCh6wd+qjvGW9TmN7wUSqG+dCMI244p5WWudwRRxFnMqpVnLtsHL8CI/K0w KPRHuj55365YUKaAqpDCh/mbQ4y171xeMYJZR+04Z3sXff+Q6EImSHP25yLpCuVdWOIF dL4Jl/brR01F0dC3vhLmeVMgm/2zyw/tDV3avL9tY0VNfjmVaLP2DPvoX7ZfNXUXQYu6 i6yA== X-Gm-Message-State: AOJu0YxGKRwLyyM6ofhm2G542jVlKjM+TqRMjNKaUdwouaa6riOX0uub Xk9Jjcwr1+oE+cVzQ1E/bNpSSlgLK7bxnO2Cc/uhJGy6TRa1a4Fl00w5oTtlbZqKCm38U8tEbay dIIIsVFSlv7Ndg3cAHIB+C9lflT5FLdwNmEJbMZwavFXhZwAH3AJj1jFNo7k= Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:7083:10b0:67b:c8c4:43bd with SMTP id 006d021491bc7-67bc8c44adamr2049838eaf.72.1773281669297; Wed, 11 Mar 2026 19:14:29 -0700 (PDT) Date: Wed, 11 Mar 2026 19:14:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b22185.a00a0220.707e5.000c.GAE@google.com> Subject: [syzbot] [bluetooth?] WARNING in l2cap_conn_start From: syzbot To: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b29fb8829bff Merge tag 'v7.0-rc3-ksmbd-server-fixes' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12289806580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c5c49ee0942d1cdb dashboard link: https://syzkaller.appspot.com/bug?extid=5a3ffe8f0bd0f1dead8e compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 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-b29fb882.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4fd392c86ab5/vmlinux-b29fb882.xz kernel image: https://storage.googleapis.com/syzbot-assets/32f95fb6f35f/bzImage-b29fb882.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5a3ffe8f0bd0f1dead8e@syzkaller.appspotmail.com ------------[ cut here ]------------ workqueue: cannot queue hci_tx_work on wq hci0 WARNING: kernel/workqueue.c:2271 at __queue_work+0xd53/0x1020 kernel/workqueue.c:2269, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events l2cap_info_timeout RIP: 0010:__queue_work+0xd7e/0x1020 kernel/workqueue.c:2269 Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 83 14 a4 00 49 8b 75 00 49 81 c7 78 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc RSP: 0018:ffffc9000023f838 EFLAGS: 00010086 RAX: 1ffff1100244618d RBX: 0000000000000008 RCX: ffff88801b78a4c0 RDX: ffff888012691178 RSI: ffffffff8aa0db00 RDI: ffffffff9014a6c0 RBP: 0000000000000020 R08: ffff888012230c57 R09: 1ffff1100244618a R10: dffffc0000000000 R11: ffffed100244618b R12: dffffc0000000000 R13: ffff888012230c68 R14: ffffffff9014a6c0 R15: ffff888012691178 FS: 0000000000000000(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd708e5e80 CR3: 00000000420ff000 CR4: 0000000000352ef0 Call Trace: queue_work_on+0x106/0x1d0 kernel/workqueue.c:2405 l2cap_send_conn_req net/bluetooth/l2cap_core.c:1230 [inline] l2cap_start_connection net/bluetooth/l2cap_core.c:1385 [inline] l2cap_conn_start+0xc6a/0xff0 net/bluetooth/l2cap_core.c:1526 l2cap_info_timeout+0x68/0xa0 net/bluetooth/l2cap_core.c:1662 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 83 c5 18 add $0x18,%ebp 3: 4c 89 e8 mov %r13,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) f: 74 08 je 0x19 11: 4c 89 ef mov %r13,%rdi 14: e8 83 14 a4 00 call 0xa4149c 19: 49 8b 75 00 mov 0x0(%r13),%rsi 1d: 49 81 c7 78 01 00 00 add $0x178,%r15 24: 4c 89 f7 mov %r14,%rdi 27: 4c 89 fa mov %r15,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 58 add $0x58,%rsp 33: 5b pop %rbx 34: 41 5c pop %r12 36: 41 5d pop %r13 38: 41 5e pop %r14 3a: 41 5f pop %r15 3c: 5d pop %rbp 3d: c3 ret 3e: cc int3 3f: cc int3 --- 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