[Ffmpeg-cvslog] r7889 - trunk/libavcodec/mpeg12.c

[michael]

Author: michael
Date: Fri Feb  9 03:21:34 2007
New Revision: 7889

Modified:
   trunk/libavcodec/mpeg12.c

Log:
fix segfault with lol-ffplay2.mpg (dunno if this is exploitable, probably not easily)


Modified: trunk/libavcodec/mpeg12.c
==============================================================================
--- trunk/libavcodec/mpeg12.c	(original)
+++ trunk/libavcodec/mpeg12.c	Fri Feb  9 03:21:34 2007
@@ -2593,6 +2593,10 @@
             break;
         }
     }
+    if(s->mb_x >= (unsigned)s->mb_width){
+        av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
+        return -1;
+    }
 
     s->resync_mb_x= s->mb_x;
     s->resync_mb_y= s->mb_y= mb_y;