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wmv1: check that the input buffer is large enough 

Fixes null ptr deref
Fixes Ticket1367

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-01 21:42:29 +02:00
parent fd0c83c666
commit f23a2418fb
1 changed files with 5 additions and 0 deletions
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5
libavcodec/wnv1.c
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@ -70,6 +70,11 @@ static int decode_frame(AVCodecContext *avctx,
int prev_y = 0, prev_u = 0, prev_v = 0; int prev_y = 0, prev_u = 0, prev_v = 0;
uint8_t *rbuf; uint8_t *rbuf;
if(buf_size<=8) {
av_log(avctx, AV_LOG_ERROR, "buf_size %d is too small\n", buf_size);
return AVERROR_INVALIDDATA;
}
rbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE); rbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
if(!rbuf){ if(!rbuf){
av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");