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avformat/flacdec: Check avio_read result when reading flac block header.

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Return AVERROR_INVALIDDATA if all four bytes aren't present.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 95bde49982a82bc10470c0adab5969ffe635d064)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Frank Liberato 2017-01-24 10:58:17 -08:00 committed by Michael Niedermayer
parent 17a9e90d1f
commit d59582a567
1 changed files with 2 additions and 1 deletions
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3
libavformat/flacdec.c
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@ -49,7 +49,8 @@ static int flac_read_header(AVFormatContext *s)
/* process metadata blocks */
while (!avio_feof(s->pb) && !metadata_last) {
avio_read(s->pb, header, 4);
if (avio_read(s->pb, header, 4) != 4)
return AVERROR(AVERROR_INVALIDDATA);
flac_parse_block_header(header, &metadata_last, &metadata_type,
&metadata_size);
switch (metadata_type) {