From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f70.google.com (mail-ot1-f70.google.com [209.85.210.70]) (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 2508E35838E for ; Wed, 7 Oct 2026 04:59:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791349167; cv=none; b=oI3m0PqKNG838FwNh8+7W1irZVXuEim1AohsTrVnlZXa2khZb9SmW8mwbVmuUC7IzNa98z0QvTG8SGrJSGxj0hR3NdomsFdEOiFkRzDvBikVPIcO0Qoa6mnFmAcEHw2j8oJLpZscQ74o/+Io8CXgt5w8SBLnJ0s4QgZYe2isLxQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791349167; c=relaxed/simple; bh=cmv7oI2/bDvRK9WWVgvBoNtGDO0YcNaZHGbrtucTjaw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bafRntmHChF84nsiStqa4qegXYA31bPsOyyAONsplHcOIEorCw+9JgdaWOYYn5+vwr2uXNkt9CAvG2x0yjvsOKKzBKCuEmo0DgS3LH4ea/sLziqTnXKwBT3VYvXgt3gUWkifpBo8nPFLmZxgFQPeXed9joRIdLJIdh3NQpW+qrM= 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=209.85.210.70 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-f70.google.com with SMTP id 46e09a7af769-8223f4fb134so5278937a34.1 for ; Tue, 06 Oct 2026 21:59:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791349165; x=1791953965; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=1bx/MgvK5FD8SdM6rN05qOM5Yx2ntRi64Zptl1pPCoQ=; b=iyhxK+puEQMzxAyHHEJo9QIOBBvBDXqRXmWWyqx/ayn/w8vJ/ntsFZKKiIQh4nXNa+ gUvv23avyNNblq8BzD3cK3jIA8+8g8ZrpYX3sElGW0BTsygJ3QdBhPuY16fPPKMAOluB f9ixnEat2o/iiYivy2poRgVAtNc3au0wJaYbOTg/L+7VwI0+WafPYo/bu1TkTIVhPjP6 BP0ecyTaPSCAtu+FKWNVEmgv8r2DQZwHtivuefaEu6KOUfQ6wJ0TZKjBUmhmwbtI9VN2 /Hj9ifRkwc96uxRjbWX5WmjfcsMyujgcG+QJktocF3QzzUKvZO4n1Mq9iBdCUFjq1tjT HD1w== X-Forwarded-Encrypted: i=1; AKwUvBxShFh96qtqwOwtVKkzkGbv1RLT5pGeSaMwzK91bECGq79RRagX1px8d01Ikei77lIkTUc8pgGnd//UHWg=@vger.kernel.org X-Gm-Message-State: AFuF++nb/IB4XGF74jXRhmNF2T+pii8d/7G/5Hroj0IwWcv59Fo8H1tW HR7X7Y/kLPAeLPdnwSIsi804Q+vMpzvK7fuBqztYkeBpV/5rSKpJiHZ8ldMAAY9PnWwMtJ5Mkcs jqjTIumf7nWkDb6rmKihmbaJhjiIVC4Jb24PsC9jw+pJhkpfEgMiCFEF2U/Q= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4f2b:b0:4d5:27da:a498 with SMTP id 5614622812f47-4fc4648102cmr1525192b6e.50.1791349165105; Tue, 06 Oct 2026 21:59:25 -0700 (PDT) Date: Tue, 06 Oct 2026 21:59:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ac5d1ad.353c8d8e.177895.000d.GAE@google.com> Subject: [syzbot] [bluetooth?] WARNING in hci_recv_frame (2) 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: 5e0f8396d480 Merge tag 'hid-for-linus-2026100201' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16583b15580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b924f079099ba6e dashboard link: https://syzkaller.appspot.com/bug?extid=2344fb8002f3ef5b1712 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 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-5e0f8396.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cc2553b94d4a/vmlinux-5e0f8396.xz kernel image: https://storage.googleapis.com/syzbot-assets/a71fb7875957/bzImage-5e0f8396.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2344fb8002f3ef5b1712@syzkaller.appspotmail.com ------------[ cut here ]------------ workqueue: cannot queue hci_rx_work on wq hci0 WARNING: kernel/workqueue.c:2353 at __queue_work+0xd83/0x10d0 kernel/workqueue.c:2352, CPU#0: syz.0.0/5329 Modules linked in: CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 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 RIP: 0010:__queue_work+0xd9f/0x10d0 kernel/workqueue.c:2352 Code: 49 81 c7 70 01 00 00 4c 8d 35 ad f3 ee 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 3b 5a ab 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 RSP: 0018:ffffc9000dddfaf8 EFLAGS: 00010046 RAX: 1ffff11002519978 RBX: dffffc0000000000 RCX: ffff8880003a8000 RDX: ffff88804395a970 RSI: ffffffff8ad8e820 RDI: ffffffff907d5aa0 RBP: 0000000000000000 R08: ffff8880128ccbaf R09: 1ffff11002519975 R10: dffffc0000000000 R11: ffffed1002519976 R12: 0000000000000008 R13: ffff8880128ccba8 R14: ffffffff907d5aa0 R15: ffff88804395a970 FS: 00007f33daf926c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33d2a07c00 CR3: 00000000439fd000 CR4: 0000000000352ef0 Call Trace: queue_work_on+0x106/0x1d0 kernel/workqueue.c:2501 queue_work include/linux/workqueue.h:700 [inline] hci_recv_frame+0x61e/0x7c0 net/bluetooth/hci_core.c:2946 vhci_get_user drivers/bluetooth/hci_vhci.c:530 [inline] vhci_write+0x35d/0x4a0 drivers/bluetooth/hci_vhci.c:626 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f33deb5e98e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007f33daf91f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f33daf926c0 RCX: 00007f33deb5e98e RDX: 0000000000000007 RSI: 0000200000000400 RDI: 00000000000000ca RBP: 00007f33dec3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f33dee26308 R14: 00007f33dee26270 R15: 00007ffd8d2ee0e8 ---------------- Code disassembly (best guess): 0: 49 81 c7 70 01 00 00 add $0x170,%r15 7: 4c 8d 35 ad f3 ee 0e lea 0xeeef3ad(%rip),%r14 # 0xeeef3bb e: 48 89 f8 mov %rdi,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 19: 74 05 je 0x20 1b: e8 3b 5a ab 00 call 0xab5a5b 20: 49 8b 75 18 mov 0x18(%r13),%rsi 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: 4c 89 e8 mov %r13,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 3a: 74 08 je 0x44 3c: 4c 89 ef mov %r13,%rdi 3f: e8 .byte 0xe8 --- 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