From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 A59E0433BDB for ; Wed, 8 Jul 2026 14:11:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783519891; cv=none; b=rg0SK8jzp+VeuC3wxy8EBQ8D3c7JbKrVPQhPMzqqomOEgdesnYd//HBWAhZxD7N+Bzbj7LRM8X7xOgywNt+ghsY8DxEU7ooImaxjgpDaW27TSeEz+YPoKGC1aFiYmU1oHEn4VvGUFVflT+KaKS7NNQTxWOMiqx9Jd6xzv0SRnVE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783519891; c=relaxed/simple; bh=+7C7np2bvzfHKHSBoOdMNA3KvnuEmxCpForLSNF0Jqo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=gXeJnw+N27+rRVLGQgiXi/981bTP4a0u+rM1iBoFuOWNxKl+qGU6awCDZCsVna7MtZAuJuxbar0r+bDFzoX7iiWaRDRKl03dSeWd1Y/35bRR+i8/QxmAs8aObej9+rJy4iwSf7lGrQNUrieoIXUJIs2FXfZG6W6K8Y8a9zfo1nc= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-49f3a97f1caso497391b6e.0 for ; Wed, 08 Jul 2026 07:11:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783519888; x=1784124688; 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=U9Xofox6Gj+24irZTw3dgn6Pa41AaL0ee+c7iWLXraI=; b=WfaVMhctnn/DJ6upPSb7q/ca3cA+lo/+mMl11FWQKDXAs/noPA7GDddLYSATl+FXDy SbYiZIO+3KQ9wckRgQqxPrxgj8KGe8Cw8oIyJ5xkH3/bohZA3STS1gF8QYjJZ+9hpyOk PSQzNqx9t8/nHeQ8fg/r5F6VKL+/y8jZ7Qjq45hyF7CpG25FLWy3sXONOw5wL4S9i8de 9ORCuSiicKlVn3KsEIxQrLA5fXzmKfbNvTyp3NZ/WEzOrJsxo9ijhS61VxdtrpntqdrL FFKO5bPjaiuO2m4vAFsncQ7LnK7oF2v3Asa+mR6raqtdPAb0JcQuu3uxeNhuw7yMR4mM Gu7w== X-Gm-Message-State: AOJu0YwzApkbJ54sv4E+4dtqAWTAgzFTVxyz0tr5j/tqfuu1Umrq49mf jADF8t6EX4/Q2mkuxZmnLkDzPZ0yy0/KW333ytVGXNhJF7u74TKkBCJ7onM41/9XYKVp2PAq8zK 9tf28nEEct8CEf8vXCIY6Ye+DqPXMEH/QM+7GrnHY95xauMLJwYI6TDCQYIRNnw== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3384:b0:495:ebd3:ea52 with SMTP id 5614622812f47-4a201cf888emr2227805b6e.2.1783519888490; Wed, 08 Jul 2026 07:11:28 -0700 (PDT) Date: Wed, 08 Jul 2026 07:11:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a4e5a90.57639fcc.86d58.0015.GAE@google.com> Subject: [syzbot] [media?] WARNING in smsusb_stop_streaming (2) From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: dc59e4fea9d8 Linux 7.2-rc1 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=142f6e6e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ec4d592e55f7960 dashboard link: https://syzkaller.appspot.com/bug?extid=0927fcf047387215ed98 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8540695a33d7/disk-dc59e4fe.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e144bb9cdc33/vmlinux-dc59e4fe.xz kernel image: https://storage.googleapis.com/syzbot-assets/6e3051bf9301/bzImage-dc59e4fe.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0927fcf047387215ed98@syzkaller.appspotmail.com ------------[ cut here ]------------ data & WORK_STRUCT_PWQ WARNING: kernel/workqueue.c:4351 at __flush_work+0xb75/0xcb0 kernel/workqueue.c:4351, CPU#0: kworker/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__flush_work+0xb75/0xcb0 kernel/workqueue.c:4351 Code: 01 e8 bf d3 11 00 e9 bf fd ff ff 48 8b 7c 24 18 e8 00 5f 9e 00 e9 f7 f6 ff ff e8 f6 5e 9e 00 e9 09 fa ff ff e8 fc 03 36 00 90 <0f> 0b 90 e9 38 fc ff ff e8 0e 5f 9e 00 e9 2d fb ff ff 48 89 df e8 RSP: 0018:ffffc9000009ebd0 EFLAGS: 00010246 RAX: 0000000000100000 RBX: ffff8881000ba405 RCX: ffffc9000fb4e000 RDX: 0000000000100000 RSI: ffffffff817e05c4 RDI: ffff888101afda00 RBP: 0000000000000004 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff817dff1a R13: ffff88810006b000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888268640000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57d5145d58 CR3: 000000011669a000 CR4: 00000000003506f0 Call Trace: __cancel_work_sync kernel/workqueue.c:4494 [inline] cancel_work_sync+0xd1/0xf0 kernel/workqueue.c:4531 smsusb_stop_streaming+0xaa/0x210 drivers/media/usb/siano/smsusb.c:183 smsusb_term_device+0x8f/0x200 drivers/media/usb/siano/smsusb.c:345 smsusb_init_device+0xb4e/0xbb0 drivers/media/usb/siano/smsusb.c:497 smsusb_probe+0xd7f/0xe1f drivers/media/usb/siano/smsusb.c:575 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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