From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (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 00B4A16F27F for ; Mon, 3 Aug 2026 12:49:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785761373; cv=none; b=RsbSWRgZSlFiSaxp1MhqiHnOu7WSec7OFZys+ln269gVM7AoH12K7WDJN90ysyjTgpUU2iDZCbpz1gAv5P3GEjbnhHCVh2KY5RzEOrjvagZCXqOfD5tG9vyyQ09hnN3dCtwQf4oohRB8R5poVhhsAA5NGW29RrCRVJxmrl6JTIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785761373; c=relaxed/simple; bh=UsgiFDaHoAOw7FOTgq68G0S9b+Wg8R/qcqmmSQBOHaA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=sCqQDTZVJiTqRNxmdjVmkLhCY41sVfHV2KY5ySyQMqK2fCvwzc00WFiXzG0KCJdjoXyp0x7PJHxSEb1BZFzTJ3bu7oz1VWfTxtGRF5N99KdAgBKAXHvGU4eL+dwZr7la7BJ1AMJmthZdsCU2AH3yRJgfa+oRwSICQjHeymo3WYk= 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=209.85.210.79 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-f79.google.com with SMTP id 46e09a7af769-7ec6685adabso4809893a34.0 for ; Mon, 03 Aug 2026 05:49:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785761371; x=1786366171; 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=64QN7LTkq2qNHaMOdcQ2ARtSM19t0SiU7kRF5dlfXI8=; b=H06raH12xzrBcdEdPiImlGcoq1gbfGNJbereJNvWk8YcxdNXlasyAnQZheX7b4Lpee xL5/Y5zJICYOUxcqbx7ba+HxVz/fyMzrDgUH8WcEl8PrpjBHYTdRzxgo5xYVsyfW3VSg mr3xDxlpk11SO/xWPvEJiIINPBuMGYcmgHeEopJsv/aod2BpyPQ7KnMvIBvAIwMdRMgc eW/qle9J67IQLXw0d97coTJpaDNf4dkQpJm8Fn2urrhQbd6k4P1NnaOhix8lBIgfm+Sv FL4PVQ3uumiSRY9T9sYjRdSf0Jp2Jdm/gDtTiER6OpsW//bNh0HQiLw159jp3j5Mnmyl N4bQ== X-Forwarded-Encrypted: i=1; AHgh+Rqu4/3kCRSSZnYioLSxq4FXm+pxq9OPUgAf9WTf3WDTrcHCqqiV0oiZ1hXGcodKndUJcLfZHVFtieaZ9g==@vger.kernel.org X-Gm-Message-State: AOJu0Yzk1fy+s1ohEHFLXzOBa5HrOAyVAxhTvhm8ZXC5zMqKRwCRJ721 LrmsPeynjRNcpnT56Vc8I6ABaiJZWuv+MFOwENDm/h2OLRkhOMuks/rpOzirLcWctFvFGauXqLl X4uTB+QsgdiEzadhWvB51yaFICuF7FkRih7BM3OumDjPXir80I/UsnWtRJkA= Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:f8f:b0:495:eb85:fc2b with SMTP id 5614622812f47-4af5e29ce58mr15188680b6e.10.1785761371033; Mon, 03 Aug 2026 05:49:31 -0700 (PDT) Date: Mon, 03 Aug 2026 05:49:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a708e5b.13bfb6d0.1ecdd5.027f.GAE@google.com> Subject: [syzbot] [media?] WARNING in v4l2_ctrl_cluster From: syzbot To: linux-kernel@vger.kernel.org, linux-media@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: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13654aea580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f221a1b5d497ed15 dashboard link: https://syzkaller.appspot.com/bug?extid=2d417475ba9d6d02cfc9 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 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-11028ab6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/50d1387eb51d/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/30ffbd0f8cd4/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2d417475ba9d6d02cfc9@syzkaller.appspotmail.com ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ------------[ cut here ]------------ ncontrols == 0 || controls[0] == NULL WARNING: drivers/media/v4l2-core/v4l2-ctrls-core.c:2493 at v4l2_ctrl_cluster+0x1a1/0x230 drivers/media/v4l2-core/v4l2-ctrls-core.c:2493, CPU#2: kworker/2:3/5745 Modules linked in: CPU: 2 UID: 0 PID: 5745 Comm: kworker/2:3 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: usb_hub_wq hub_event RIP: 0010:v4l2_ctrl_cluster+0x1a1/0x230 drivers/media/v4l2-core/v4l2-ctrls-core.c:2493 Code: 03 38 d0 7c 08 84 d2 0f 85 88 00 00 00 0f b6 43 35 41 83 e7 01 41 c1 e7 02 83 e0 fb 44 09 f8 88 43 35 eb 09 e8 50 11 f2 f9 90 <0f> 0b 90 e8 47 11 f2 f9 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0000:ffffc90004406f10 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff88179997 RDX: ffff8880263f2540 RSI: ffffffff88179b10 RDI: ffff8880263f2540 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000002 R14: ffff8880449f9628 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888096de3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f72be860 CR3: 0000000073249000 CR4: 0000000000352ef0 Call Trace: v4l2_ctrl_auto_cluster+0x4e/0x3a0 drivers/media/v4l2-core/v4l2-ctrls-core.c:2515 hackrf_probe.cold+0x5f0/0x12ef drivers/media/usb/hackrf/hackrf.c:1430 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+0x30a3/0x4a60 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+0x72b/0xd50 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