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truemotion1: Check input buffer size against header size.

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Fixes overread.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-02 21:36:42 +01:00
parent a3f5ee297a
commit e7b43e8e84
1 changed files with 1 additions and 1 deletions
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2
libavcodec/truemotion1.c
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@ -314,7 +314,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
const uint8_t *sel_vector_table; const uint8_t *sel_vector_table;
header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f; header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
if (s->buf[0] < 0x10) if (s->buf[0] < 0x10 || header.header_size >= s->size)
{ {
av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]); av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
return -1; return -1;