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avformat/aiffdec: Check that SSND is at least 8 bytes

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Fixes: Infinite loop
Fixes: 30874/clusterfuzz-testcase-minimized-ffmpeg_dem_AIFF_fuzzer-5933710488764416

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 2021-03-03 10:49:04 +01:00
parent fdcb966f4a
commit 460d3dc41f
1 changed files with 2 additions and 0 deletions
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2
libavformat/aiffdec.c
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@ -286,6 +286,8 @@ static int aiff_read_header(AVFormatContext *s)
get_meta(s, "comment" , size);
break;
case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
if (size < 8)
return AVERROR_INVALIDDATA;
aiff->data_end = avio_tell(pb) + size;
offset = avio_rb32(pb); /* Offset of sound data */
avio_rb32(pb); /* BlockSize... don't care */