From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f2.google.com (mail-oi2-f2.google.com [74.125.231.194]) (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 3EA6E39CCE6 for ; Thu, 27 Aug 2026 18:52:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.194 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787856762; cv=none; b=TJAg/iiqWPKMOE3vD8jyQQxJHrTbFBtxHczqOFrcq2S1245hcZMkB0qzz4pV2gjVSGNM7giDijqB0fUjef5XMb82dKDJcmv07lYHToFt8C24algeuZWN4E9oXgzihXg8E9tYmMolNxpLbq7D8Tp5gS430hMOQPm7tIX3nNE4cVA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787856762; c=relaxed/simple; bh=hncabP7aPdHnuobTgSgk9fapXLnpLfx/uBL89CqOutI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=FiJaEpHsFZUdgbH7cnEr0TgocKWCXiR+ZJpgyBMe9t57yrY5dBGoOVO8JB6YPc3TdkoJbJior2ZFKNmGCynYak5FZSNA2VmGNt7oLM2PaUfglLPDW2Y58Fn/huUoShcWaeXQme+PlfH+SLlrLrJxae90yqpZPKLedYgL0G3qxIU= 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=74.125.231.194 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-oi2-f2.google.com with SMTP id 5614622812f47-495d5d27acfso134441b6e.1 for ; Thu, 27 Aug 2026 11:52:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787856760; x=1788461560; 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=Z1iWycX4pkHURg1o4GzvWHnwxlT8370uqudXNgMPEzI=; b=GTcb0rEa7pZXJKfItZh8jY/Lbwsf4ZGr3IiqHwYEE+ApBqxyci+TveBzvNtnq0wj6d w49UL6l2M/FrX2jDtBPJFBl761VEjWHsqyh9+FsNX8iQnSHUFOMUAmmDgvmBL25q84E4 mG1hrZFO2x5SMYD6j5S0FVZds7nWMzHe1ktCh2jPLTCtO2SDSyU0J776/ZSkVsjd9jcl KdKIF3uQAEusf2A6K8imn4bFA6jaDjQHbZrs7YmmkVj6X0ESJp/9ns4yj1jBPJrnf9RU IyIjv8IS+RRsyCPwbpYaap+Z0IgHe+3XY1aQDTV5PaZNnm522rkNFmOIhZ+gTeugM/0M LXHw== X-Forwarded-Encrypted: i=1; AHgh+RqsKCQjONlIspHXHE4IdqzXoKjAq8agCfFioW2UyBYMxORHCwnoIJurOLK3s45xQXA/dFf2vLKMMBaTqE8=@vger.kernel.org X-Gm-Message-State: AFuF++n030Im5tFC/cfXXbcCm5+04yZnViSuc3rbmSraxj/7QPb5sjCf XGQlBz+OFT+ckYEenFaQg7DarFwWbZtFyKqO6/IscjCoUsUrNpbRDRjV/BcZV8thLUAMCkYGDYu XBscOmBFEhRQn+UB/ILlAvDbteGuReCJhsX+ecS4R4JLszqqmt3+lfrlg/oI= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1918:b0:4b3:8ae8:7a47 with SMTP id 5614622812f47-4b398340b93mr1111506b6e.16.1787856760208; Thu, 27 Aug 2026 11:52:40 -0700 (PDT) Date: Thu, 27 Aug 2026 11:52:40 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a908778.1d9ded08.62e62.00db.GAE@google.com> Subject: [syzbot] [bluetooth?] WARNING in msft_do_close (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: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15bde979580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 dashboard link: https://syzkaller.appspot.com/bug?extid=14ce1b05b7d5a989abbe compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111a3979580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f88579580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-818bebeb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6e4100526b12/vmlinux-818bebeb.xz kernel image: https://storage.googleapis.com/syzbot-assets/723c4783ee96/bzImage-818bebeb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+14ce1b05b7d5a989abbe@syzkaller.appspotmail.com ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#1: kworker/u34:2/5890 WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x944/0x1bc0 kernel/locking/mutex.c:821, CPU#1: kworker/u34:2/5890 Modules linked in: CPU: 1 UID: 0 PID: 5890 Comm: kworker/u34:2 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: hci0 hci_power_on RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline] RIP: 0010:__mutex_lock+0x94b/0x1bc0 kernel/locking/mutex.c:821 Code: 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 b4 10 00 00 44 8b 05 d8 d5 7a 05 45 85 c0 75 13 48 8d 3d ac da 7d 05 48 c7 c6 a0 d2 ef 8b <67> 48 0f b9 3a 90 e9 1b f8 ff ff 4d 8d a7 f0 0a 00 00 4c 89 e7 e8 RSP: 0018:ffffc90002937890 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88803c0a4440 RCX: 1ffffffff2287150 RDX: 0000000000000000 RSI: ffffffff8befd2a0 RDI: ffffffff91468f60 RBP: ffffc90002937a00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000075eb R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888056a15980 FS: 0000000000000000(0000) GS:ffff8880d5ca2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8ddaddcff8 CR3: 000000002b956000 CR4: 0000000000352ef0 Call Trace: msft_do_close+0x32e/0x6a0 net/bluetooth/msft.c:698 hci_dev_close_sync+0x1020/0x13c0 net/bluetooth/hci_sync.c:5596 hci_dev_do_close+0x2e/0xb0 net/bluetooth/hci_core.c:502 hci_power_on+0x1be/0x630 net/bluetooth/hci_core.c:940 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387 process_scheduled_works kernel/workqueue.c:3470 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx 4: 38 d0 cmp %dl,%al 6: 7c 08 jl 0x10 8: 84 d2 test %dl,%dl a: 0f 85 b4 10 00 00 jne 0x10c4 10: 44 8b 05 d8 d5 7a 05 mov 0x57ad5d8(%rip),%r8d # 0x57ad5ef 17: 45 85 c0 test %r8d,%r8d 1a: 75 13 jne 0x2f 1c: 48 8d 3d ac da 7d 05 lea 0x57ddaac(%rip),%rdi # 0x57ddacf 23: 48 c7 c6 a0 d2 ef 8b mov $0xffffffff8befd2a0,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 90 nop 30: e9 1b f8 ff ff jmp 0xfffff850 35: 4d 8d a7 f0 0a 00 00 lea 0xaf0(%r15),%r12 3c: 4c 89 e7 mov %r12,%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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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