[FFmpeg-cvslog] indeo5: reject negative motion vectors

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Sun Jun 30 10:35:07 2013 +0200| [1194a410807bac3eafbeb632578b937656d273e7] | committer: Luca Barbato

indeo5: reject negative motion vectors

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=1194a410807bac3eafbeb632578b937656d273e7
---

 libavcodec/indeo5.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c
index dc5f6f0..7a60f49 100644
--- a/libavcodec/indeo5.c
+++ b/libavcodec/indeo5.c
@@ -520,6 +520,12 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
                         mv_x += IVI_TOSIGNED(mv_delta);
                         mb->mv_x = mv_x;
                         mb->mv_y = mv_y;
+                        if (mv_x < 0 || mv_y < 0) {
+                            av_log(avctx, AV_LOG_ERROR, "Invalid MV %d %d\n",
+                                   mv_x, mv_y);
+                            mb->mv_x = mb->mv_y = 0;
+                            return AVERROR_INVALIDDATA;
+                        }
                     }
                 }
             }