mxfdec: Include FF_INPUT_BUFFER_PADDING_SIZE when allocating extradata.

This prevents out of bounds reads when extradata is being decoded.

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index e2688b1bff9f7b714df9e78655f73402883696fb..8906bdd78f9a904af2d38a138da0ae76ef02cf5b 100644 (file)
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -600,7 +600,7 @@ static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
     default:
         /* Private uid used by SONY C0023S01.mxf */
         if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
-            descriptor->extradata = av_malloc(size);
+            descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
             if (!descriptor->extradata)
                 return -1;
             descriptor->extradata_size = size;