commit 2aa91b37c8f8691c6a77f87b0b2551d15dca2ad2
author Chia-I Wu <olv@google.com> Mon May 15 10:32:27 2017 -0700
committer android-build-team Robot <android-build-team-robot@google.com> Thu Jun 08 18:24:08 2017 +0000
tree 82cb23d91d5d87e43adff5106953a13a2fd5d244
parent a6381e33b0c33b3342f743ba4e3e47cff10bba71

libgui: check for invalid slot in attachBuffer

Bug: 37478824
Test: manual
Change-Id: I369337d53539bf7f7e3d925bccdae4045da1b404
(cherry picked from commit c79a29689c1046f1f0301c75df9b9a67cba8bf04)

libs/gui/IGraphicBufferProducer.cpp

diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index c3c6235..51eedab 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -26,6 +26,7 @@
 #include <binder/Parcel.h>
 #include <binder/IInterface.h>
 
+#include <gui/BufferQueueDefs.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <gui/IProducerListener.h>
 
@@ -170,8 +171,16 @@
         if (result != NO_ERROR) {
             return result;
         }
+
         *slot = reply.readInt32();
         result = reply.readInt32();
+        if (result == NO_ERROR &&
+                (*slot < 0 || *slot >= BufferQueueDefs::NUM_BUFFER_SLOTS)) {
+            ALOGE("attachBuffer returned invalid slot %d", *slot);
+            android_errorWriteLog(0x534e4554, "37478824");
+            return UNKNOWN_ERROR;
+        }
+
         return result;
     }