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avformat/tta: Check for EOF in index reading loop 

Fixes: OOM
Fixes: 33585/clusterfuzz-testcase-minimized-ffmpeg_dem_TTA_fuzzer-4564665830080512

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 b72d657b73)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-05-04 18:34:44 +02:00
parent 37449dfb92
commit d358379349
1 changed files with 2 additions and 0 deletions
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2
libavformat/tta.c
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@ -119,6 +119,8 @@ static int tta_read_header(AVFormatContext *s)
for (i = 0; i < c->totalframes; i++) {
uint32_t size = avio_rl32(s->pb);
int r;
if (avio_feof(s->pb))
return AVERROR_INVALIDDATA;
if ((r = av_add_index_entry(st, framepos, i * (int64_t)c->frame_size, size, 0,
AVINDEX_KEYFRAME)) < 0)
return r;