From 09319b435f0e87cb9def1a695ec59e336de8ff51 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Tue, 11 Sep 2018 12:48:40 +0200
Subject: Release mapped surface memory on size check failure to plug a leak.

---
 dom/base/nsContentUtils.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'dom/base/nsContentUtils.cpp')

diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 2f85c1b7e..49fe5143f 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -7990,6 +7990,8 @@ GetSurfaceDataImpl(mozilla::gfx::DataSourceSurface* aSurface,
                                                             &maxBufLen,
                                                             &bufLen);
   if (NS_FAILED(rv)) {
+    // Release mapped memory
+    aSurface->Unmap();
     return GetSurfaceDataContext::NullValue();
   }
 
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