From: cristy <urban-warrior@git.imagemagick.org>
Date: Wed, 24 Sep 2014 00:21:44 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~1981
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cb2e679b5ac77fdfb839265830c39ddbb6254add;p=imagemagick

---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index a9f623f67..abb367d9f 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -747,16 +747,21 @@ MagickPrivate void DisassociateBlob(Image *image)
   assert(image->blob != (BlobInfo *) NULL);
   assert(image->blob->signature == MagickSignature);
   clone=MagickFalse;
+  LockSemaphoreInfo(image->semaphore);
   LockSemaphoreInfo(image->blob->semaphore);
   assert(image->blob->reference_count >= 0);
   if (image->blob->reference_count > 1)
     clone=MagickTrue;
   UnlockSemaphoreInfo(image->blob->semaphore);
   if (clone == MagickFalse)
-    return;
+    {
+      UnlockSemaphoreInfo(image->semaphore);
+      return;
+    }
   blob=CloneBlobInfo(image->blob);
   DestroyBlob(image);
   image->blob=blob;
+  UnlockSemaphoreInfo(image->semaphore);
 }
 
 /*