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avidec: Make sure a packet is large enough before reading its data

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 8d07258bb6063d0780ce2d39443d6dc6d8eedc5a)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Conflicts:
	libavformat/avidec.c
(cherry picked from commit 2e4c649b3e62fdd158b5a9a0f973d3b186a23e94)
This commit is contained in:
Martin Storsjö 2013-09-28 00:41:31 +03:00 committed by Luca Barbato
parent efe59ad90b
commit 889bdc47f6
1 changed files with 4 additions and 2 deletions
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6
libavformat/avidec.c
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@ -749,8 +749,10 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
return 0;
}
static int read_gab2_sub(AVStream *st, AVPacket *pkt) {
if (!strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data+5) == 2) {
static int read_gab2_sub(AVStream *st, AVPacket *pkt)
{
if (pkt->size >= 7 &&
!strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data + 5) == 2) {
uint8_t desc[256];
int score = AVPROBE_SCORE_MAX / 2, ret;
AVIStream *ast = st->priv_data;