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avformat/tmv: Check video chunk size 

This check matches the audio chunk check

Fixes: Timeout
Fixes: 62681/clusterfuzz-testcase-minimized-ffmpeg_dem_TMV_fuzzer-5299107876700160

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 b79fc70596)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-10-09 00:07:32 +02:00
parent 676f7ceef6
commit dca3db3ec9
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1 changed files with 4 additions and 0 deletions
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4
libavformat/tmv.c
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@ -103,6 +103,10 @@ static int tmv_read_header(AVFormatContext *s)
char_cols = avio_r8(pb);
char_rows = avio_r8(pb);
tmv->video_chunk_size = char_cols * char_rows * 2;
if (!tmv->video_chunk_size) {
av_log(s, AV_LOG_ERROR, "invalid video chunk size\n");
return AVERROR_INVALIDDATA;
}
features = avio_r8(pb);
if (features & ~(TMV_PADDING | TMV_STEREO)) {