From f3bdf1fc39fb779790325304c4e705db59dceb8f Mon Sep 17 00:00:00 2001
From: Sotaro Ikeda <sikeda@mozilla.com>
Date: Thu, 22 May 2014 06:17:03 -0700
Subject: [PATCH] Bug 1012737 - Add erro check to
 GrallocTextureClientOGL::GetAsDrawTarget() r=nical

---
 gfx/layers/opengl/GrallocTextureClient.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/layers/opengl/GrallocTextureClient.cpp b/gfx/layers/opengl/GrallocTextureClient.cpp
index 50be454947fa..9519677c1544 100644
--- a/gfx/layers/opengl/GrallocTextureClient.cpp
+++ b/gfx/layers/opengl/GrallocTextureClient.cpp
@@ -171,6 +171,10 @@ GrallocTextureClientOGL::GetAsDrawTarget()
   MOZ_ASSERT(IsValid());
   MOZ_ASSERT(mMappedBuffer, "Calling TextureClient::GetAsDrawTarget without locking :(");
 
+  if (!IsValid() || !IsAllocated()) {
+    return nullptr;
+  }
+
   if (mDrawTarget) {
     return mDrawTarget;
   }