[FFmpeg-cvslog] r18224 - trunk/libavcodec/interplayvideo.c

[reimar]

Author: reimar
Date: Sun Mar 29 19:50:46 2009
New Revision: 18224

Log:
Change CHECK_STREAM_PTR macro to correctly handle the (extremely unlikely)
overflow case.

Modified:
   trunk/libavcodec/interplayvideo.c

Modified: trunk/libavcodec/interplayvideo.c
==============================================================================
--- trunk/libavcodec/interplayvideo.c	Sun Mar 29 19:42:03 2009	(r18223)
+++ trunk/libavcodec/interplayvideo.c	Sun Mar 29 19:50:46 2009	(r18224)
@@ -76,7 +76,7 @@ typedef struct IpvideoContext {
 } IpvideoContext;
 
 #define CHECK_STREAM_PTR(n) \
-  if ((s->stream_ptr + n) > s->stream_end) { \
+  if (s->stream_end - s->stream_ptr < n) { \
     av_log(s->avctx, AV_LOG_ERROR, "Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \
       s->stream_ptr + n, s->stream_end); \
     return -1; \