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>
release/7.0
Michael Niedermayer 10 months ago
parent 61dca9e150
commit e849eb2343
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
  1. 4
      libavformat/matroskadec.c

@ -3195,6 +3195,10 @@ static int matroska_parse_tracks(AVFormatContext *s)
track->time_scale);
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 */

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