Change CHECK_STREAM_PTR macro to correctly handle the (extremely unlikely)

overflow case. Originally committed as revision 18224 to svn://svn.ffmpeg.org/ffmpeg/trunk
16 years ago · a1f6ffd44d
parent 3017d8e9d7
commit a1f6ffd44d
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/interplayvideo.c
+++ b/libavcodec/interplayvideo.c
@ -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; \