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avformat/matroskadec: Check duration

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Fixes: -nan is outside the range of representable values of type 'long'
Fixes: 44614/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6216204841254912

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-02-14 20:01:35 +01:00
parent c900f2e42c
commit 36680078ca
1 changed files with 2 additions and 0 deletions
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libavformat/matroskadec.c
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@ -3065,6 +3065,8 @@ static int matroska_read_header(AVFormatContext *s)
if (!matroska->time_scale)
matroska->time_scale = 1000000;
if (isnan(matroska->duration))
matroska->duration = 0;
if (matroska->duration)
matroska->ctx->duration = matroska->duration * matroska->time_scale *
1000 / AV_TIME_BASE;