From f23a2418fb0ccc56fdae4dbf83a5994cc917c475 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 1 Jun 2012 21:42:29 +0200 Subject: [PATCH] wmv1: check that the input buffer is large enough Fixes null ptr deref Fixes Ticket1367 Signed-off-by: Michael Niedermayer --- libavcodec/wnv1.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/wnv1.c b/libavcodec/wnv1.c index 21ff361f1e..62e9b992a4 100644 --- a/libavcodec/wnv1.c +++ b/libavcodec/wnv1.c @@ -70,6 +70,11 @@ static int decode_frame(AVCodecContext *avctx, int prev_y = 0, prev_u = 0, prev_v = 0; 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); if(!rbuf){ av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");