nuv: check size of buffer before accessing it instead of after.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

diff --git a/libavcodec/nuv.c b/libavcodec/nuv.c
index bb236d1edf6c5c605e6051bc486305e0f88c6fda..17fcb70f99a69b40a8f9782cbf3dab5c87bc3e09 100644 (file)
--- a/libavcodec/nuv.c
+++ b/libavcodec/nuv.c
@@ -164,7 +164,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         return orig_size;
     }
 
-    if (buf[0] != 'V' || buf_size < 12) {
+    if (buf_size < 12 || buf[0] != 'V') {
         av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
         return -1;
     }