From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 A5F9C2D607 for ; Mon, 19 Feb 2024 13:10:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708348205; cv=none; b=SAQe+Kp6a9ECQVqHukK0B6kJNOD5kGuMtFu8rnKosfU0Dvd/ibePhRC5wyIw+0qDKO622zCnbMjUxYgw5aXwQbwLhmWoWX1OFpduBaFILog0VfnOx80amo5+BhbyV7JeBb3gzfb1+rJ1o8FgBjnFMWBMfSYG5Ypa6Wj3cr8doAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708348205; c=relaxed/simple; bh=6biU2L8B/V7conuu8Ja0RqbgynGZas3q2ELFDjoWe9I=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=HHfT0rEMmtzdeNCx5RCusuk4RRP8x3GkbsdbgkVZGVUXnoyAd+L2obLnyZbdq4DeI2hu6X5peFoqCwAcOojwmfJloe260CM/i3rV9iZVpJ7LKVtAxI3UEkIRv4N0q+24ZOe7Dmpzv/tN/VJjbpxQW+a3TdQg8OIXIvyjDANBAxY= 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=209.85.166.199 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-f199.google.com with SMTP id e9e14a558f8ab-364ff869140so30220475ab.2 for ; Mon, 19 Feb 2024 05:10:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708348203; x=1708953003; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=SDiM6XZIafcYqC9Ci7EigVOUHJMlV0bbSuptTdR0jkE=; b=Bs0ReWoa1zTyTyRvmL3YiqGXGgboE1dpA+Pie4T3U3ORMxLV+apyURF/J9Gm/hRjys E8L1KW7/7OGCpoeR2bbmDd1nfkWlwcjtpZVZ3xdilswB6+iQ1jXsattWCr9rrL/HOHP9 Z8Zw1bTQO4UzTOdZGujTDHl3A13tGifKdeZsHK/I1OLu3ctuPgMsTQikgqIPbCJmvk6b jBuiwlpV4vuODmGswdZGj/04FmmKMvuiGbbAWivEUr0Y+Vfhfofs+oVuSYliFtBYeSow 8YJVRc3NrKG0E8d9WgqMme1i8WWjp7io+JrKEGOGarPmIzkWmoS6STq5lvBhtfM+XGWj lPXA== X-Forwarded-Encrypted: i=1; AJvYcCVtZoPUxyIIFpIVFlEiYYm3cc4UNMQVpfR2FN2OTG6i/wY9l1kaSyFgAr7LSUkrD+sSHkxRwYeY/kugP2QRSAshNCyS1CehIfpj X-Gm-Message-State: AOJu0Yzs9hFUGFgNdio497n0kNBc7U8SWEOsVTkbG7895QvbjPKdpiB+ CU5CE789fjMfIGJZuSDNWAdpHLHVrcl/TWsW2w1LfZi0xI53rLPlt06NJ3Y7YqhC6HmxyMHsFd5 BcoXNySo1a81h9a2hByKmvdBGxvI026dqs+GYAnV6dU66ryNgI/c/sw8= X-Google-Smtp-Source: AGHT+IF6TLcgpBQRPhRX8L09PDGE2CYgtM71N6waCHlrqv3vgJCX/1zRjvQEqZxY2d/3yRVs9Vor2ZAaNeLYh8ivM+AaJxbX7gXf Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:154f:b0:363:9252:ed47 with SMTP id j15-20020a056e02154f00b003639252ed47mr1114563ilu.1.1708348203022; Mon, 19 Feb 2024 05:10:03 -0800 (PST) Date: Mon, 19 Feb 2024 05:10:03 -0800 In-Reply-To: <0000000000008b96230610c6b3fe@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cb40790611bbcffd@google.com> Subject: Re: [syzbot] [usb?] [media?] possible deadlock in vb2_video_unregister_device From: syzbot To: benjamin.gaignard@collabora.com, hdanton@sina.com, hverkuil-cisco@xs4all.nl, hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, 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" syzbot has bisected this issue to: commit c838530d230bc638d79b78737fc4488ffc28c1ee Author: Benjamin Gaignard Date: Thu Nov 9 16:34:59 2023 +0000 media: media videobuf2: Be more flexible on the number of queue stored buffers bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=166dc872180000 start commit: b401b621758e Linux 6.8-rc5 git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=156dc872180000 console output: https://syzkaller.appspot.com/x/log.txt?x=116dc872180000 kernel config: https://syzkaller.appspot.com/x/.config?x=eff9f3183d0a20dd dashboard link: https://syzkaller.appspot.com/bug?extid=3b1d4b3d5f7a358bf9a9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13ffaae8180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13ef909c180000 Reported-by: syzbot+3b1d4b3d5f7a358bf9a9@syzkaller.appspotmail.com Fixes: c838530d230b ("media: media videobuf2: Be more flexible on the number of queue stored buffers") For information about bisection process see: https://goo.gl/tpsmEJ#bisection