Commit 9fa43c81c for imagemagick.org

commit 9fa43c81c91109010e087c96d799226f72436418
Author: Cristy <urban-warrior@imagemagick.org>
Date:   Mon Feb 23 12:03:01 2026 -0500

    check for write overflow

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index a8a473137..c9561719f 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -1646,7 +1646,10 @@ static inline ssize_t WriteBlobStream(Image *image,const size_t length,
   if (blob_info->type != BlobStream)
     return(WriteBlob(image,length,(const unsigned char *) data));
   if (blob_info->offset > (MagickOffsetType) (MAGICK_SSIZE_MAX-length))
-    return(0);
+    {
+      errno=EOVERFLOW;
+      return(0);
+    }
   extent=(MagickSizeType) (blob_info->offset+(MagickOffsetType) length);
   if (extent >= blob_info->extent)
     {