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avformat/4xm: Consider max_streams on reallocating tracks array

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Fixes: OOM
Fixes: 41595/clusterfuzz-testcase-minimized-ffmpeg_dem_FOURXM_fuzzer-6355979363549184

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-12-07 09:14:08 +01:00
parent e22ec484aa
commit 0dcd95ef8a
1 changed files with 2 additions and 1 deletions
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3
libavformat/4xm.c
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@ -137,7 +137,8 @@ static int parse_strk(AVFormatContext *s,
return AVERROR_INVALIDDATA;
track = AV_RL32(buf + 8);
if ((unsigned)track >= UINT_MAX / sizeof(AudioTrack) - 1) {
if ((unsigned)track >= UINT_MAX / sizeof(AudioTrack) - 1 ||
track >= s->max_streams) {
av_log(s, AV_LOG_ERROR, "current_track too large\n");
return AVERROR_INVALIDDATA;
}