From: "\"zhilizhao(赵志立)\"" <quinkblack@foxmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 3/3] avformat/mov: disallow a zero sample size in trun atoms
Date: Tue, 28 Jun 2022 11:03:00 +0800
Message-ID: <tencent_5E909366C8A7F42A8853395C4F4BBC260306@qq.com> (raw)
In-Reply-To: <20220627200241.7102-3-cus@passwd.hu>
> On Jun 28, 2022, at 4:02 AM, Marton Balint <cus@passwd.hu> wrote:
>
> In order to not generate 0 sized packets or create a huge index table
> needlessly.
>
> Fixes: Timeout
> Fixes: 43717/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5206008287330304
> Fixes: 45738/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6142535657979904
>
> Signed-off-by: Marton Balint <cus@passwd.hu>
> ---
> libavformat/mov.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index c6fbe511c0..d7ef6ba6d6 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -5179,6 +5179,8 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
> distance++;
> if (av_sat_add64(dts, sample_duration) != dts + (uint64_t)sample_duration)
> return AVERROR_INVALIDDATA;
> + if (!sample_size)
> + return AVERROR_INVALIDDATA;
> dts += sample_duration;
> offset += sample_size;
> sc->data_size += sample_size;
LGTM.
> --
> 2.35.3
>
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next prev parent reply other threads:[~2022-06-28 3:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-27 20:02 [FFmpeg-devel] [PATCH 1/3] Revert "avformat/demux: Count EAGAIN as 100 bytes in relation to read limit in avformat_find_stream_info()" Marton Balint
2022-06-27 20:02 ` [FFmpeg-devel] [PATCH 2/3] Revert "avformat/demux: Make read_frame_internal() return AVERREOR(EAGAIN) on stuck empty input parser" Marton Balint
2022-06-27 20:02 ` [FFmpeg-devel] [PATCH 3/3] avformat/mov: disallow a zero sample size in trun atoms Marton Balint
2022-06-28 3:03 ` "zhilizhao(赵志立)" [this message]
2022-07-06 21:38 ` Marton Balint
2022-06-28 5:15 ` [FFmpeg-devel] [PATCH 1/3] Revert "avformat/demux: Count EAGAIN as 100 bytes in relation to read limit in avformat_find_stream_info()" Anton Khirnov
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