[FFmpeg-devel] [PATCH 4/4] avformat/lafdec: Check for 0 parameters

[Sean McGovern]

On Thu, Nov 2, 2023, 19:50 Michael Niedermayer <michael at niedermayer.cc>
wrote:

> Fixes: Timeout
> Fixes:
> 63661/clusterfuzz-testcase-minimized-ffmpeg_dem_LAF_fuzzer-6615365234589696
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by
> <https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by>:
> Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavformat/lafdec.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/libavformat/lafdec.c b/libavformat/lafdec.c
> index 59a59dcfe9c..b867f106aee 100644
> --- a/libavformat/lafdec.c
> +++ b/libavformat/lafdec.c
> @@ -139,7 +139,9 @@ static int laf_read_header(AVFormatContext *ctx)
>      s->index = 0;
>      s->stored_index = 0;
>      s->bpp = bpp;
> -    if ((int64_t)bpp * st_count * (int64_t)sample_rate >= INT32_MAX)
> +    if ((int64_t)bpp * st_count * (int64_t)sample_rate >= INT32_MAX ||
> +        (int64_t)bpp * st_count * (int64_t)sample_rate == 0
> +    )
>          return AVERROR_INVALIDDATA;
>      s->data = av_calloc(st_count * sample_rate, bpp);
>      if (!s->data)
> --
> 2.17.1
>
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This looks OK to me.

-- Sean McGovern

>