1 files changed, 42 insertions, 0 deletions
diff --git a/debian/patches/dont_crash_on_broken_gif_images.patch b/debian/patches/dont_crash_on_broken_gif_images.patch
new file mode 100644
index 0000000..4524a8f
--- /dev/null
+++ b/debian/patches/dont_crash_on_broken_gif_images.patch
@@ -0,0 +1,42 @@
+From 19d31c5b036a46365584d7d97e87f7fe16150623 Mon Sep 17 00:00:00 2001
+From: Lars Knoll <lars.knoll@digia.com>
+Date: Thu, 24 Apr 2014 15:33:27 +0200
+Subject: [PATCH] Don't crash on broken GIF images
+
+Broken GIF images could set invalid width and height
+values inside the image, leading to Qt creating a null
+QImage for it. In that case we need to abort decoding
+the image and return an error.
+
+Initial patch by Rich Moore.
+
+Backport of Id82a4036f478bd6e49c402d6598f57e7e5bb5e1e from Qt 5
+
+Task-number: QTBUG-38367
+Change-Id: I0680740018aaa8356d267b7af3f01fac3697312a
+Security-advisory: CVE-2014-0190
+---
+ src/gui/image/qgifhandler.cpp | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/src/gui/image/qgifhandler.cpp b/src/gui/image/qgifhandler.cpp
+index 3324f04..5199dd3 100644
+--- a/src/gui/image/qgifhandler.cpp
++++ b/src/gui/image/qgifhandler.cpp
+@@ -359,6 +359,13 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
+                     memset(bits, 0, image->byteCount());
+                 }
+ 
++                // Check if the previous attempt to create the image failed. If it
++                // did then the image is broken and we should give up.
++                if (image->isNull()) {
++                    state = Error;
++                    return -1;
++                }
++
+                 disposePrevious(image);
+                 disposed = false;
+ 
+-- 
+1.8.5.1
+