File ImageMagick-CVE-2020-27755.patch of Package ImageMagick.30956

Index: ImageMagick-6.8.8-1/magick/image.c
===================================================================
--- ImageMagick-6.8.8-1.orig/magick/image.c	2020-12-08 18:21:14.680495963 +0100
+++ ImageMagick-6.8.8-1/magick/image.c	2020-12-08 18:23:50.817550877 +0100
@@ -2451,6 +2451,18 @@ MagickExport MagickBooleanType SetImageE
     return(MagickFalse);
   image->columns=columns;
   image->rows=rows;
+  if (image->depth == 0)
+    {
+      image->depth=8;
+      (void) ThrowMagickException(&image->exception,GetMagickModule(),
+        ImageError,"ImageDepthNotSupported","`%s'",image->filename);
+    }
+  if (image->depth > (8*sizeof(MagickSizeType)))
+    {
+      image->depth=8*sizeof(MagickSizeType);
+      (void) ThrowMagickException(&image->exception,GetMagickModule(),
+        ImageError,"ImageDepthNotSupported","`%s'",image->filename);
+    }
   return(SyncImagePixelCache(image,&image->exception));
 }