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vble: check packet size. 

Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-29 23:10:03 +01:00
parent 10416a4d56
commit 0b28abf903
1 changed files with 5 additions and 0 deletions
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5
libavcodec/vble.c
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@ -127,6 +127,11 @@ static int vble_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
if (pic->data[0])
avctx->release_buffer(avctx, pic);
if (avpkt->size < 4 || avpkt->size - 4 > INT_MAX/8) {
av_log(avctx, AV_LOG_ERROR, "Invalid packet size\n");
return AVERROR_INVALIDDATA;
}
/* Allocate buffer */
if (avctx->get_buffer(avctx, pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");