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 A912C249ED for ; Sat, 8 Jun 2024 23:51:03 +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=1717890665; cv=none; b=APNAhUhVrh/bn/Kxbn7/mnDM5woDTVKhL3qJxLnwSw72HYNJ7hnaGquLYaOiDULkEUagii7E8MOyeBZjwIbeKVLP/6Upo7ymmPMWyw/bs/sRg4m+EUsHQav8V5u9g6yl6WaaqHIV78UTiCAKXi2MQMUZzYJs4K6AkgWb21KQV6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717890665; c=relaxed/simple; bh=d0niSI0BPqgORWJ8d6uor4Qauk2a0PRIg7Z3CF9XdmY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=BYmVHybRSSv7f7cZhLUoA6fXKgkVca/wfR1Xh9GEh6D3S9Qd+kxoAA5sUfpSOWSi9a6OzZgPB/LGDAectqz4uRzShHQDVrQNhgLHtheFzlFnjLztGHiwraeOwMojz3BP7CEVV6zWrNfNLA/X8C6cw+2P3m/Z4LIqnj/+v94FPT0= 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-3737b3ae019so33957825ab.2 for ; Sat, 08 Jun 2024 16:51:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717890663; x=1718495463; 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=K1VLo2KJi9o9tzQVg0N1w+H/e9lvP5uDzyw9PtVc0as=; b=Tq3bsGIX2N8Ihr/gh9BlabMOfYQ5bxvmyVKP7Djw9na7gCg/o82QoSUWUhtSeg9ZD4 SM+iyamdMvfgOreRnFDD4tuxiTE0duDqb3D7+Pnmmd5i3RNG1cE0VHfMgeOD8nw3AL4O MWuDmOhVoaFuXBTuTZbLXf9XQ0YrzBcVslKEX4ELikNzCUVKNrlvDIZxlHkiwsDOVVSi /sYGPo3JFzffTIMFpdkh79atFPoABBHIRfFLhjKYZLHvgtWuMRfxgJK6JI6Lw9TFMWDC phLeYsREp2rJXyCepiTJYCLV3xurxp0xlPASfUzdIHbqH2QwhAGLvAUC7gD7lgz8jUwT xBuQ== X-Forwarded-Encrypted: i=1; AJvYcCVN0+MaAIUQBmiyFyXFTPBCMiQr/y75LvVXvKNBQG/iCQGsMLPtrmzjmZqqusz3kC9e6dBnDPLAoBdgEgdTm//wX5x5OYeqqE+Q X-Gm-Message-State: AOJu0YxoCasPUFr7e3mSQYYQcGLhXGZY+Y8dToci0eq99xEUddJsDHoD 0bGu4V7HgkZOB+AKrbshoVPQG0eEt+mG5JwmVPiaXcadv5bCuZFcv+7T7mHfCtTAmyDGuyGRYRG 2BljohzQquXeajm/65il3ve2yCY0wAwlwbuHnt/pXQp9Nga0bKc8otaE= X-Google-Smtp-Source: AGHT+IHJ8bs/U3I3g1f4q/Xp24Ah0Qnma9lKdfqjhw9W8j5aEoYUBtabb+mH1Cbm0PU1piVVmfgBeW2+PGKAZvVoTvSuYOx3fOwS Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c49:b0:374:9a34:a0a with SMTP id e9e14a558f8ab-375803d3e9bmr5712495ab.6.1717890662891; Sat, 08 Jun 2024 16:51:02 -0700 (PDT) Date: Sat, 08 Jun 2024 16:51:02 -0700 In-Reply-To: <0000000000008b96230610c6b3fe@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b99437061a6996df@google.com> Subject: Re: [syzbot] [media?] [usb?] 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 suspects this issue was fixed by commit: commit 65e6a2773d655172143cc0b927cdc89549842895 Author: Benjamin Gaignard Date: Sat Mar 2 10:37:08 2024 +0000 media: usbtv: Remove useless locks in usbtv_video_free() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1009e6f6980000 start commit: b401b621758e Linux 6.8-rc5 git tree: upstream 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 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: media: usbtv: Remove useless locks in usbtv_video_free() For information about bisection process see: https://goo.gl/tpsmEJ#bisection