[Ffmpeg-cvslog] CVS: ffmpeg/libavcodec snow.c,1.64,1.65

[Michael Niedermayer CVS]

Update of /cvsroot/ffmpeg/ffmpeg/libavcodec
In directory mail:/var2/tmp/cvs-serv22523

Modified Files:
	snow.c 
Log Message:
check block_max_depth (fixes crash)


Index: snow.c
===================================================================
RCS file: /cvsroot/ffmpeg/ffmpeg/libavcodec/snow.c,v
retrieving revision 1.64
retrieving revision 1.65
diff -u -d -r1.64 -r1.65
--- snow.c	3 Dec 2005 03:07:54 -0000	1.64
+++ snow.c	3 Dec 2005 14:20:03 -0000	1.65
@@ -3185,6 +3185,11 @@
     s->mv_scale= get_symbol(&s->c, s->header_state, 0);
     s->qbias= get_symbol(&s->c, s->header_state, 1);
     s->block_max_depth= get_symbol(&s->c, s->header_state, 0);
+    if(s->block_max_depth > 1){
+        av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large", s->block_max_depth);
+        s->block_max_depth= 0;
+        return -1;
+    }
 
     return 0;
 }