[tbb-commits] [tor-browser/esr24] Bug 1015636 - Check if PDF Viewer embed overlay has valid state. r=johns, a=dveditz

[mikeperry at torproject.org]

commit 57d9a8971efde965d1313c6bbb7ab98cd5f4e44e
Author: Yury Delendik <ydelendik at mozilla.com>
Date:   Fri May 30 18:03:05 2014 -0500

    Bug 1015636 - Check if PDF Viewer embed overlay has valid state. r=johns, a=dveditz
---
 browser/extensions/pdfjs/components/PdfRedirector.js |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/browser/extensions/pdfjs/components/PdfRedirector.js b/browser/extensions/pdfjs/components/PdfRedirector.js
index 4a08ec2..2758ffe 100644
--- a/browser/extensions/pdfjs/components/PdfRedirector.js
+++ b/browser/extensions/pdfjs/components/PdfRedirector.js
@@ -60,6 +60,10 @@ function getObjectUrl(window) {
   }
 
   // Checking if overlay is a proper PlayPreview overlay.
+  if (element.displayedType !== element.TYPE_NULL ||
+      element.pluginFallbackType !== element.PLUGIN_PLAY_PREVIEW) {
+    return null; // invalid plugin element overlay state
+  }
   for (var i = 0; i < element.children.length; i++) {
     if (element.children[i] === containerElement) {
       return null; // invalid plugin element overlay