Don't memcpy from unallocated memory

Originally committed as revision 2459 to svn://svn.ffmpeg.org/ffmpeg/trunk
21 years ago · bc0219fd95
parent ddaae6a9d1
commit bc0219fd95
1 changed files with 2 additions and 1 deletions
--- a/libavcodec/msrle.c
+++ b/libavcodec/msrle.c
@ -177,7 +177,8 @@ static int msrle_decode_frame(AVCodecContext *avctx,
    }

    /* grossly inefficient, but...oh well */
-    memcpy(s->frame.data[0], s->prev_frame.data[0], 
+    if (s->prev_frame.data[0] != NULL)
+	memcpy(s->frame.data[0], s->prev_frame.data[0], 
        s->frame.linesize[0] * s->avctx->height);

    msrle_decode_pal8(s);