File ImageMagick-CVE-2017-12983.patch of Package ImageMagick.29977

--- a/coders/sfw.c
+++ b/coders/sfw.c
@@ -253,8 +253,8 @@ static Image *ReadSFWImage(const ImageInfo *image_info,ExceptionInfo *exception)
   */
   if (GetBlobSize(image) != (size_t) GetBlobSize(image))
     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
-  buffer=(unsigned char *) AcquireQuantumMemory((size_t) GetBlobSize(image),
-    sizeof(*buffer));
+  buffer=(unsigned char *) AcquireQuantumMemory((size_t) GetBlobSize(image)+
+    MaxTextExtent,sizeof(*buffer));
   if (buffer == (unsigned char *) NULL)
     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
   count=ReadBlob(image,(size_t) GetBlobSize(image),buffer);