Index: x/installing/xorg-server.xml
===================================================================
--- x/installing/xorg-server.xml (revision 73db5703f3d2d2cf4f4341c7f88f2e909674ba6e)
+++ x/installing/xorg-server.xml (revision b1a4b4a77920c0487007b8ff9d8c0d0f1645a4fb)
@@ -132,4 +132,10 @@
patch -Np1 -i ../xorg-server-&xorg-server-version;-add_prime_support-1.patch-->
+
+
+ First, apply a fix for a security vulnerability identified upstream:
+
+
+sed -i 's/malloc(pScreen/calloc(1, pScreen/' dix/pixmap.c