Am Do., 23. Mai 2019 um 01:47 Uhr schrieb Michael Niedermayer
<michael at niedermayer.cc>:
>
> Fixes: Timeout (14sec -> 9sec)
> Fixes: 13398/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_fuzzer-5664106709778432
>
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
> libavcodec/ffv1dec_template.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/libavcodec/ffv1dec_template.c b/libavcodec/ffv1dec_template.c
> index 1b7f6c4bf5..0b1d176ba1 100644
> --- a/libavcodec/ffv1dec_template.c
> +++ b/libavcodec/ffv1dec_template.c
> @@ -86,11 +86,19 @@ static av_always_inline int RENAME(decode_line)(FFV1Context *s, int w,
> run_mode = 2;
> }
> }
> + if (sample[1][x - 1] == sample[0][x - 1]) {
> + while (run_count > 1 && w-x > 1) {
> + sample[1][x] = sample[0][x];
> + x++;
> + run_count--;
> + }
> + } else {
Does this change have a measurable effect on your usual sample files?
Carl Eugen