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vble: check packet size.

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Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <[email protected]>
This commit is contained in:
Michael Niedermayer committed 2012-11-29 23:12:42 +01:00
1 parent 10416a4d56
commit 0b28abf903
1 file changed
+5
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libavcodec/vble.c
+5
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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");