--- /dev/null
+From 9362c7ddd1af3b168953d0737877bc52d79c94f4 Mon Sep 17 00:00:00 2001
+From: Tobias Stoeckmann <tobias@stoeckmann.org>
+Date: Sun, 25 Sep 2016 21:43:09 +0200
+Subject: Validate lengths while parsing server data.
+
+Individual lengths inside received server data can overflow
+the previously reserved memory.
+
+It is therefore important to validate every single length
+field to not overflow the previously agreed sum of all invidual
+length fields.
+
+v2: consume remaining bytes in the reply buffer on error.
+
+CVE: CVE-2016-7949
+Upstream-Status: Backport
+
+Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
+Reviewed-by: Matthieu Herrb@laas.fr
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+
+diff --git a/src/Xrender.c b/src/Xrender.c
+index 3102eb2..71cf3e6 100644
+--- a/src/Xrender.c
++++ b/src/Xrender.c
+@@ -533,12 +533,30 @@ XRenderQueryFormats (Display *dpy)
+ screen->fallback = _XRenderFindFormat (xri, xScreen->fallback);
+ screen->subpixel = SubPixelUnknown;
+ xDepth = (xPictDepth *) (xScreen + 1);
++ if (screen->ndepths > rep.numDepths) {
++ Xfree (xri);
++ Xfree (xData);
++ _XEatDataWords (dpy, rep.length);
++ UnlockDisplay (dpy);
++ SyncHandle ();
++ return 0;
++ }
++ rep.numDepths -= screen->ndepths;
+ for (nd = 0; nd < screen->ndepths; nd++)
+ {
+ depth->depth = xDepth->depth;
+ depth->nvisuals = xDepth->nPictVisuals;
+ depth->visuals = visual;
+ xVisual = (xPictVisual *) (xDepth + 1);
++ if (depth->nvisuals > rep.numVisuals) {
++ Xfree (xri);
++ Xfree (xData);
++ _XEatDataWords (dpy, rep.length);
++ UnlockDisplay (dpy);
++ SyncHandle ();
++ return 0;
++ }
++ rep.numVisuals -= depth->nvisuals;
+ for (nv = 0; nv < depth->nvisuals; nv++)
+ {
+ visual->visual = _XRenderFindVisual (dpy, xVisual->visual);
+--
+cgit v0.10.2
+
