[FFmpeg-cvslog] dxa: Make sure the reference frame exists

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Wed Aug 14 16:51:53 2013 +0200| [5ef7c84a9374681c64722a96d91741f3b990af2b] | committer: Luca Barbato

dxa: Make sure the reference frame exists

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5ef7c84a9374681c64722a96d91741f3b990af2b
---

 libavcodec/dxa.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/dxa.c b/libavcodec/dxa.c
index 9e7f453..ddc31f3 100644
--- a/libavcodec/dxa.c
+++ b/libavcodec/dxa.c
@@ -255,6 +255,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
     case 3:
     case 4:
     case 5:
+        if (!tmpptr) {
+            av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
+            return AVERROR_INVALIDDATA;
+        }
         frame->key_frame = !(compr & 1);
         frame->pict_type = (compr & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
         for(j = 0; j < avctx->height; j++){