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avformat/vividas: Check for EOF in first loop in track_header() 

Fixes: timeout (243sec -> a few ms)
Fixes: 25716/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5764093666131968

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-09-20 21:09:31 +02:00
parent 688c1175ba
commit 7170d342e5
1 changed files with 2 additions and 0 deletions
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2
libavformat/vividas.c
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@ -293,6 +293,8 @@ static int track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *
for (i=0;i<val_1;i++) {
int c = avio_r8(pb);
if (avio_feof(pb))
return AVERROR_EOF;
for (j=0;j<c;j++) {
if (avio_feof(pb))
return AVERROR_EOF;