diff --git a/gfx/layers/ipc/SharedBufferManagerParent.cpp b/gfx/layers/ipc/SharedBufferManagerParent.cpp
index 4bf6d4c8a781..283c35d4ff6f 100644
--- a/gfx/layers/ipc/SharedBufferManagerParent.cpp
+++ b/gfx/layers/ipc/SharedBufferManagerParent.cpp
@@ -213,7 +213,12 @@ bool SharedBufferManagerParent::RecvAllocateGrallocBuffer(const IntSize& aSize,
 
   if (aFormat == 0 || aUsage == 0) {
     printf_stderr("SharedBufferManagerParent::RecvAllocateGrallocBuffer -- format and usage must be non-zero");
-    return true;
+    return false;
+  }
+
+  if (aSize.width <= 0 || aSize.height <= 0) {
+    printf_stderr("SharedBufferManagerParent::RecvAllocateGrallocBuffer -- requested gralloc buffer size is invalid");
+    return false;
   }
 
   // If the requested size is too big (i.e. exceeds the commonly used max GL texture size)