From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f77.google.com (mail-oo1-f77.google.com [209.85.161.77]) (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 ACC622E8DEC for ; Thu, 30 Apr 2026 15:25:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777562748; cv=none; b=MbgdGRmZuxcGifKQJqdcqKMRJyQ1sKf/TvFG+o4WK3wqC7PbwPxsTk8ljhnx4NSfX17FsWhAMzHe0Wo6ZsSqmNxZ6JZge2pzUfouWB/givU2ZiFxZ6njEWUwEXU5tcb6TS0WuObpEhkO0Yl0/YM6+nnEgVg+6jgMppmIjJsRNHQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777562748; c=relaxed/simple; bh=Jb+W/c8q5pIXe64yihqmRs2snXid3xrVWxzGQEqzGso=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=CfUN/v1zwi/ZD9/350S+2RhcyNVedHW9eWsLPgBmvP6vbvuc/61C5CV45Yjri9HsCw98980h9qx2KxJF7x7qcGe1STxKqMJ17YYUAjkaatR56Mcb+YAk4WjLTw6QMT2+IDZN9p5zNfKGtQkFdvhHBMDa5jV4YfbKRphN/sO/qa0= 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=209.85.161.77 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-f77.google.com with SMTP id 006d021491bc7-6966f1f4490so2340233eaf.1 for ; Thu, 30 Apr 2026 08:25:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777562745; x=1778167545; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=rq2+BnD3PgSUbQ80h6yebk3lUMErj3s/YmUC1cmrT1w=; b=KxWakFNeusrmmfHyZJyNcK0fO1eZ61hlz3aketO5sN/xJCnFVR5PG/wOKxtUOA6hni slVZvVArI/rOa4Jp4pSVnrRUQ0i2XWYr3QQmeVoechvpM48Zs1fXDsTHg2LNSsQukD5C 3MsOLu/LDGc+8lrMItcTfJRh11fvn6Wk+EycNhCGyBxhlxqVSPeQzOaZs7udI8Kq0GG4 5bZ5cvWJlxqP8K08tueeE2zQl8tLrVRY6BgFxYNDDs9ljn8VIEF4YCLZC0PzGUOYt5pC kPXaFzaz8+ekX0z4TOEOMNHaDuQs4DuNuqlczk55l6Ukqb9b//zUvopDLQ9MHSHNg/Xi x2HA== X-Forwarded-Encrypted: i=1; AFNElJ8yS9tGWPdnmU8hDIkKwTiPy2VWk15+36Moa7FZXxcLfF0hIdH9JzB+S7/xsL+iaxsl2oANztRCC6R34Dc=@vger.kernel.org X-Gm-Message-State: AOJu0YxW8OF3L/zSKCgZb7uiV3IeVFHkjUpmkwtpQwH5a3mJGmNmApEV Dc4Qkqtm99E7UUXyHuQvxrqH6QLwjbhaYx1aSE+9uqeOYYzKSa6CvVUutvqYM+ahKB7b8gWIjC4 a6owJJ4wVkU0AwWoZYx2YNQPUe7hCITGtn9o50w+OHpm0VtOMGZOU5uDAoyk= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2f08:b0:696:2b58:4ac0 with SMTP id 006d021491bc7-6967bdc8fe6mr913952eaf.35.1777562745581; Thu, 30 Apr 2026 08:25:45 -0700 (PDT) Date: Thu, 30 Apr 2026 08:25:45 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f37479.170a0220.5f1b.0003.GAE@google.com> Subject: [syzbot] [net?] WARNING in hci_sock_sendmsg From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, kuniyu@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, willemb@google.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9974969c1403 Add linux-next specific files for 20260428 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16056b6c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fff2b12da07ad dashboard link: https://syzkaller.appspot.com/bug?extid=8fe47b0d0d2830a8d3be 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: https://storage.googleapis.com/syzbot-assets/755177aac4cc/disk-9974969c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fe2f57d4e79e/vmlinux-9974969c.xz kernel image: https://storage.googleapis.com/syzbot-assets/15b13a4a7518/bzImage-9974969c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8fe47b0d0d2830a8d3be@syzkaller.appspotmail.com ------------[ cut here ]------------ workqueue: cannot queue hci_tx_work on wq hci0 WARNING: kernel/workqueue.c:2298 at __queue_work+0xd67/0x1010 kernel/workqueue.c:2296, CPU#1: syz.0.23/5836 Modules linked in: CPU: 1 UID: 0 PID: 5836 Comm: syz.0.23 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__queue_work+0xd87/0x1010 kernel/workqueue.c:2296 Code: 01 00 00 4c 8d 35 49 c5 21 0e 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 b3 f6 a0 00 49 8b 75 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 e9 11 48 RSP: 0018:ffffc90005817958 EFLAGS: 00010046 RAX: 1ffff11004a2198f RBX: 0000000000000008 RCX: 0000000000080000 RDX: ffff888037302968 RSI: ffffffff8a252410 RDI: ffffffff8faf47a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1004a2198d R12: dffffc0000000000 R13: ffff88802510cc78 R14: ffffffff8faf47a0 R15: ffff888037302968 FS: 00007f2b3bbfe6c0(0000) GS:ffff888125dd8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c459547 CR3: 000000004410a000 CR4: 00000000003526f0 Call Trace: queue_work_on+0x106/0x1d0 kernel/workqueue.c:2432 queue_work include/linux/workqueue.h:696 [inline] hci_sock_sendmsg+0xb3d/0xf40 net/bluetooth/hci_sock.c:-1 sock_sendmsg_nosec+0x112/0x150 net/socket.c:797 __sock_sendmsg net/socket.c:812 [inline] sock_write_iter+0x308/0x410 net/socket.c:1269 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x629/0xba0 fs/read_write.c:688 ksys_write+0x156/0x270 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2b3d9acdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2b3bbfe028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f2b3dc25fa0 RCX: 00007f2b3d9acdd9 RDX: 0000000000000006 RSI: 0000200000000240 RDI: 0000000000000006 RBP: 00007f2b3da42d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2b3dc26038 R14: 00007f2b3dc25fa0 R15: 00007fffb59042a8 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 4c 8d 35 49 c5 21 0e lea 0xe21c549(%rip),%r14 # 0xe21c552 9: 4c 89 e8 mov %r13,%rax c: 48 c1 e8 03 shr $0x3,%rax 10: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 15: 74 08 je 0x1f 17: 4c 89 ef mov %r13,%rdi 1a: e8 b3 f6 a0 00 call 0xa0f6d2 1f: 49 8b 75 00 mov 0x0(%r13),%rsi 23: 4c 89 f7 mov %r14,%rdi 26: 4c 89 fa mov %r15,%rdx * 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2e: 48 83 c4 58 add $0x58,%rsp 32: 5b pop %rbx 33: 41 5c pop %r12 35: 41 5d pop %r13 37: 41 5e pop %r14 39: 41 5f pop %r15 3b: 5d pop %rbp 3c: e9 .byte 0xe9 3d: 11 .byte 0x11 3e: 48 rex.W --- 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