File ImageMagick-CVE-2014-9838.patch of Package ImageMagick.7150
--- a/magick/cache.c
+++ b/magick/cache.c
@@ -3559,7 +3559,8 @@ static MagickBooleanType OpenPixelCache(Image *image,const MapMode mode,
packet_size+=sizeof(IndexPacket);
length=number_pixels*packet_size;
columns=(size_t) (length/cache_info->rows/packet_size);
- if (cache_info->columns != columns)
+ if ((cache_info->columns != columns) || ((ssize_t) cache_info->columns < 0) ||
+ ((ssize_t) cache_info->rows < 0))
ThrowBinaryException(ResourceLimitError,"PixelCacheAllocationFailed",
image->filename);
cache_info->length=length;