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avcodec/shorten: Check skip_bytes()

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Fixes CID1210526

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d201becfc0d89c6a5dfe44e96f1044fbc2aadb70)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-05-15 16:48:31 +02:00
parent f33bd39d27
commit 008c1debb9
1 changed files with 5 additions and 0 deletions
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5
libavcodec/shorten.c
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@ -369,6 +369,11 @@ static int read_header(ShortenContext *s)
s->nmean = get_uint(s, 0);
skip_bytes = get_uint(s, NSKIPSIZE);
if ((unsigned)skip_bytes > get_bits_left(&s->gb)/8) {
av_log(s->avctx, AV_LOG_ERROR, "invalid skip_bytes: %d\n", skip_bytes);
return AVERROR_INVALIDDATA;
}
for (i = 0; i < skip_bytes; i++)
skip_bits(&s->gb, 8);
}