From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 8D1482750FB for ; Tue, 29 Jul 2025 07:52:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753775565; cv=none; b=khPkfxYg6vevJWUI8U2hWpnlLBfL9rhygI27XQMQr5xmqqP7d4p/C5NLZc+1YM049DD/SPG7EjW/S/Crk5UfiKUBO7axfNgXRq7t1GzcH13lMjMAlAkd6AvPXD3dalf8keWm0T0AP/141TogPq2SKTN86IueuqIwZ/qOSKGH2X8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753775565; c=relaxed/simple; bh=JK+Yyk1lKU6YOKonCJlGa63Tn9Q0PZa1t/8lBHGY/Hw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ZdGMleIxVrTEpPokXl08YCWORdyCBkj7GOTr8zDCl/KMEFKgO76nE1RkJ3aKPqLUFo5qAscbGkhwSL/6zg1KL3vF7yn42D5jqYymcXKsZ8pttAqY5qN1EKBZFD3tGbeNVLgPuyZQ0LwzHy5NOr6ESn8m55VHj0MC/tJW0N464L0= 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=209.85.166.205 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-il1-f205.google.com with SMTP id e9e14a558f8ab-3e26ad54369so8511085ab.1 for ; Tue, 29 Jul 2025 00:52:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753775560; x=1754380360; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nbG8wd61X6ynMDPJo7MPMMjMERfBKuH4wO9zJ3JvFWw=; b=xTi/Zx5rymPIFuN0VKsGClzrTC5ce3yKMwFJH4J2h6oQqeYtcarlsSOw3SpNap8AsW PK3OsPdYCj3+LeG0lC0Ar2vuskPMxc4MAYdoYBmwtzwd92ll4wpZqti0Hf3CIfDuY/AN vtlBdNj/9a5KMKUSwAVbnK1Ye2CEM0Osnvif0wvQMhno96GVDwVFZvbwd8eCFKrjKrEl hP97gTRioE0jnROX+c+UpdAGl/9FPs3Vg5rPUIfJRpoatO0AmJl9GHNekgtsNYK7amlp rte0Ib4bv1GBH3gUXyUIIdAsomP/+QQLKeYCUspBjJWqhHUULMUUS1b+8NA8txu2QD73 Zjrg== X-Forwarded-Encrypted: i=1; AJvYcCUcZWtLzW4H01Cs5LVf5mhpRpz+k6RYS6Eb/HaIDUdGRZV11Cah4SykzIUz0O8nTdX4m1l01DjgecHivUFGPco=@vger.kernel.org X-Gm-Message-State: AOJu0YzrzbRtRBiNxULqIxqZkaMoRnwBF0T1zPdCXl/yvXcDJj9/paz+ AoIWYGwHBlNmLCho6c55bCvH86i80fcJQe4oe0zYvEsYo2mdCcWDA5w2PYnB+4SOlXxKzu6p6gB SeqtOanYODE/dpSpo+8iGcyVwm94kR1Ss5/Zm34xdwXDUdeTPWpl891whGEU= X-Google-Smtp-Source: AGHT+IH+iNQai/JtuO7kN5Osv7FHpXRBDH7MMcJwfJP/YcoFfQs42hRG+CGNZYWHNOR5TCTDplZpelSrQVHa3HAUfZJZ3Ql36XcR Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d89:b0:3de:e74:be13 with SMTP id e9e14a558f8ab-3e3e9217c4bmr36637405ab.0.1753775560671; Tue, 29 Jul 2025 00:52:40 -0700 (PDT) Date: Tue, 29 Jul 2025 00:52:40 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68887dc8.050a0220.3cc461.0012.GAE@google.com> Subject: [syzbot] [bluetooth?] WARNING: kobject bug in hci_disconnect_all_sync From: syzbot To: johan.hedberg@gmail.com, 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: 25fae0b93d1d Merge tag 'drm-fixes-2025-07-24' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=130a10a2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a4bcc0a11b3192be dashboard link: https://syzkaller.appspot.com/bug?extid=860000a5278649faf5f6 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e51e91fa1800/disk-25fae0b9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/49603fd616e9/vmlinux-25fae0b9.xz kernel image: https://storage.googleapis.com/syzbot-assets/31b7fb718dea/bzImage-25fae0b9.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+860000a5278649faf5f6@syzkaller.appspotmail.com Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Opcode 0x0c1a failed: -4 ------------[ cut here ]------------ kobject: '(null)' (ffff888034398be8): is not initialized, yet kobject_get() is being called. WARNING: CPU: 1 PID: 18293 at lib/kobject.c:642 kobject_get+0x7d/0x120 lib/kobject.c:640 Modules linked in: CPU: 1 UID: 0 PID: 18293 Comm: syz.1.2765 Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:kobject_get+0x7d/0x120 lib/kobject.c:640 Code: 90 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e6 4c be f6 48 8b 33 48 c7 c7 40 8c b9 8c 48 89 da e8 44 2a 20 f6 90 <0f> 0b 90 90 eb 0c e8 c8 3a 5c f6 eb 46 e8 c1 3a 5c f6 4c 8d 73 38 RSP: 0018:ffffc900040473f0 EFLAGS: 00010246 RAX: d5e6b273e7d72b00 RBX: ffff888034398be8 RCX: 0000000000080000 RDX: ffffc9000f833000 RSI: 000000000001c99e RDI: 000000000001c99f RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: ffff888034398000 R13: ffff888034398be8 R14: ffff888034398c24 R15: dffffc0000000000 FS: 00007f6d5d6746c0(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000015000 CR3: 000000007e615000 CR4: 0000000000350ef0 Call Trace: hci_conn_get include/net/bluetooth/hci_core.h:1620 [inline] hci_disconnect_all_sync+0x115/0x350 net/bluetooth/hci_sync.c:5705 hci_suspend_sync+0x3b8/0xc00 net/bluetooth/hci_sync.c:6188 hci_suspend_dev+0x28d/0x4d0 net/bluetooth/hci_core.c:2851 hci_suspend_notifier+0xf2/0x290 net/bluetooth/hci_core.c:2422 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 notifier_call_chain_robust kernel/notifier.c:120 [inline] blocking_notifier_call_chain_robust+0x85/0x100 kernel/notifier.c:345 pm_notifier_call_chain_robust+0x2c/0x60 kernel/power/main.c:102 snapshot_open+0x19c/0x280 kernel/power/user.c:77 misc_open+0x2bc/0x330 drivers/char/misc.c:161 chrdev_open+0x4cc/0x5e0 fs/char_dev.c:414 do_dentry_open+0xdf3/0x1970 fs/open.c:964 vfs_open+0x3b/0x340 fs/open.c:1094 do_open fs/namei.c:3896 [inline] path_openat+0x2ee5/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6d5c78e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d5d674038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f6d5c9b6240 RCX: 00007f6d5c78e9a9 RDX: 0000000000040000 RSI: 0000200000000680 RDI: ffffffffffffff9c RBP: 00007f6d5c810d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000019 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6d5c9b6240 R15: 00007fffd9731ce8 --- 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