https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6070

diff --git a/MagickCore/string.c b/MagickCore/string.c
index b065ccd6ec320ebadc4115297bfa5f99e1440608..9a0853dab4b2c5a87328d3d015b8c2a3d9f5321d 100644 (file)
--- a/MagickCore/string.c
+++ b/MagickCore/string.c
@@ -237,6 +237,8 @@ MagickExport StringInfo *BlobToStringInfo(const void *blob,const size_t length)
     }
   if (blob != (const void *) NULL)
     (void) memcpy(string_info->datum,blob,length);
+  else
+    (void) memset(string_info->datum,0,length);
   return(string_info);
 }
 \f