From bd9cbc3b5547e096eca243c3ec7ebe3ee1ab3b89 Mon Sep 17 00:00:00 2001
From: Jamie Gennis <jgennis@google.com>
Date: Sun, 27 Feb 2011 18:40:09 -0800
Subject: [PATCH] surfaceflinger_client: Don't dereference NULL ptrs.

This change adds a null pointer check before dereferencing buffers in
a Surface list of known GraphicBuffer objects.  If not all the buffers
have been dequeued before this list can legitimately contain NULL
entries.

Change-Id: I0e105b53a3f6f9a5404716b7bf150c793ff648a6
---
 libs/surfaceflinger_client/Surface.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/surfaceflinger_client/Surface.cpp b/libs/surfaceflinger_client/Surface.cpp
index 1e9bd744f..68611d6a3 100644
--- a/libs/surfaceflinger_client/Surface.cpp
+++ b/libs/surfaceflinger_client/Surface.cpp
@@ -1040,7 +1040,7 @@ int Surface::getBufferIndex(const sp<GraphicBuffer>& buffer) const
         // e.g. if GraphicBuffer is used to wrap an android_native_buffer_t that
         // was dequeued from an ANativeWindow.
         for (size_t i = 0; i < mBuffers.size(); i++) {
-            if (buffer->handle == mBuffers[i]->handle) {
+            if (mBuffers[i] != 0 && buffer->handle == mBuffers[i]->handle) {
                 idx = mBuffers[i]->getIndex();
                 break;
             }