account for boundary condition

ImageMagick · Sep 8, 2023 · cec3678 · cec3678
1 parent c5bc4b0
commit cec3678
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/magick/cache.c b/magick/cache.c
@@ -2943,7 +2943,7 @@ static inline MagickBooleanType IsOffsetOverflow(const ssize_t y,
 {
   if ((y == 0) || (columns == 0))
     return(MagickFalse);
-  if (y > (ssize_t) (MAGICK_SSIZE_MAX/columns))
+  if (y >= (ssize_t) (MAGICK_SSIZE_MAX/columns))
     return(MagickTrue);
   return(MagickFalse);
 }