From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 CC82420320 for ; Wed, 28 Feb 2024 05:03:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709096599; cv=none; b=HlBP25fh3T+4KEaWOFsO6sk5KEaP1BJv2DVExeTgEdnH38cuWBScaIbgmx8CU/WzjXVmpgG1aqjTPp06B3XLOKn1BAXVw3GrM3V0T4/vT48FdPcmapi0H7ImIoiwdkncv9oB3VYN1a7NwJ1LA7MWrmelEj1j2WIqa8VkG1B/oyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709096599; c=relaxed/simple; bh=IcJu0XYMy2/eKbfOW9/K+j1/WMkhTVyCV1cBVRPywU4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=lNOO5dto4oQ7NzjuapO74TFDydyCGXmRdKqTp3/h+h6tyeQHC89UZtzkjcGKd+jLHT/wKQxPUPYnUR0ixfDQ4uTHg9hG4jYMsGOg4kAjH3/wNhDE8htyr5iVDH8wp/KE1uwO1C9RgyScixdGY8Y40EfJPQA192XcriVvE2Xy3Pc= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3651a261194so31683445ab.1 for ; Tue, 27 Feb 2024 21:03:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709096597; x=1709701397; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=LTOizF5wVcFTzMt2UNKgPkpTl3/Lnnj26VxalAGL3TI=; b=UwyEE9/VIOG8FGEw/MBlHku40zOBppB3UxcBozObw+8OF4y08+8ILZfJgjfimyLLMZ SFLJnTR/AnhrtaX1b2M+aIFScyTKEHCQXHQt7byHV2udsAkcchssBdymqNSoECKevBSv 4svFvk0IvXkkoxojtKjtqTgzUrbq0cpDfYWnp6OWfTIIbajjsWHOl9Uy2OW/3BSDr3sR TFhOj82DqIdKvzRSTOnqeNJ9a/sa0NhrsD3718EsRPzpH1P2e5nqihRObgDu9QM1rTz8 41AdBBEo6Fea80bdrTGnlYBahXjeXeTkN7G8jCFcf12TedSIupbdkUsKtomaeWVBhw6G OIsA== X-Gm-Message-State: AOJu0Yzfbsr/Nz3HhsF8GwU7XXP9Y77LwB1LNAAV5pgHH9k0CowduGIW GJofPgzB0gQg4vCJ0unMy/lfD20xNbjwjUrvX/xtLHC+k6VrsLWZofYwXYomDNfDdvv9VJyosYw UJOxLOPNUuvd1sGXIeMUB9kyu2JEqPRvJwXFgn6zzcs5vGZfPyEf0zFyCrQ== X-Google-Smtp-Source: AGHT+IEFXwIUb1wWdKgRcdSYHr30xWPvKueyFjhf2d86D5Ca205szkfWxeElKGbEateWybgPAU4joHQxjOKEyfu23aoXvRSt7/Oe Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2147:b0:365:38db:a585 with SMTP id d7-20020a056e02214700b0036538dba585mr897435ilv.1.1709096597167; Tue, 27 Feb 2024 21:03:17 -0800 (PST) Date: Tue, 27 Feb 2024 21:03:17 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008faf0a06126a0ffb@google.com> Subject: [syzbot] [media?] [usb?] INFO: task hung in vb2_video_unregister_device From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, m.szyprowski@samsung.com, mchehab@kernel.org, syzkaller-bugs@googlegroups.com, tfiga@chromium.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9abbc24128bc Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=12073622180000 kernel config: https://syzkaller.appspot.com/x/.config?x=af5c6c699e57bbb3 dashboard link: https://syzkaller.appspot.com/bug?extid=2622b51b35f91a00ea18 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=132173d2180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d7ec54180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ce13ec3ed5ad/disk-9abbc241.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/256cbd314121/vmlinux-9abbc241.xz kernel image: https://storage.googleapis.com/syzbot-assets/0af86fb52109/Image-9abbc241.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2622b51b35f91a00ea18@syzkaller.appspotmail.com INFO: task kworker/0:1:10 blocked for more than 143 seconds. Tainted: G B 6.8.0-rc5-syzkaller-g9abbc24128bc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:0 pid:10 tgid:10 ppid:2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 vb2_video_unregister_device+0x11c/0x1dc drivers/media/common/videobuf2/videobuf2-v4l2.c:1269 usbtv_video_free+0x4c/0x84 drivers/media/usb/usbtv/usbtv-video.c:970 usbtv_disconnect+0x6c/0xc4 drivers/media/usb/usbtv/usbtv-core.c:138 usb_unbind_interface+0x1a4/0x758 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x440/0x6a0 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574 device_del+0x480/0x87c drivers/base/core.c:3828 usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1416 usb_disconnect+0x290/0x808 drivers/usb/core/hub.c:2267 hub_port_connect drivers/usb/core/hub.c:5323 [inline] hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] port_event drivers/usb/core/hub.c:5783 [inline] hub_event+0x18ec/0x435c drivers/usb/core/hub.c:5865 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x970/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 INFO: lockdep is turned off. --- 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