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avformat/matroskadec: Check timescale 

Fixes: 3.82046e+18 is outside the range of representable values of type 'unsigned int'
Fixes: 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6381436594421760

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e849eb2343)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-03-26 00:57:33 +01:00
parent 8f5b0e1249
commit 0c7d6c4eea
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1 changed files with 4 additions and 0 deletions
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libavformat/matroskadec.c
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@ -2687,6 +2687,10 @@ static int matroska_parse_tracks(AVFormatContext *s)
if (track->time_scale < 0.01)
track->time_scale = 1.0;
if (matroska->time_scale * track->time_scale > UINT_MAX)
return AVERROR_INVALIDDATA;
avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1000 * 1000 * 1000); /* 64 bit pts in ns */