1 files changed, 47 insertions, 0 deletions
diff --git a/x11-servers/xorg-server/files/patch-CVE-2014-8093-1-6 b/x11-servers/xorg-server/files/patch-CVE-2014-8093-1-6
new file mode 100644
index 000000000000..ffa7e3995647
--- /dev/null
+++ b/x11-servers/xorg-server/files/patch-CVE-2014-8093-1-6
@@ -0,0 +1,47 @@
+From 23fe7718bb171e71db2d1a30505c2ca2988799d9 Mon Sep 17 00:00:00 2001
+From: Adam Jackson <ajax@redhat.com>
+Date: Mon, 10 Nov 2014 12:13:36 -0500
+Subject: [PATCH 19/40] glx: Be more paranoid about variable-length requests
+ [CVE-2014-8093 1/6]
+
+If the size computation routine returns -1 we should just reject the
+request outright.  Clamping it to zero could give an attacker the
+opportunity to also mangle cmdlen in such a way that the subsequent
+length check passes, and the request would get executed, thus passing
+data we wanted to reject to the renderer.
+
+Reviewed-by: Keith Packard <keithp@keithp.com>
+Reviewed-by: Julien Cristau <jcristau@debian.org>
+Reviewed-by: Michal Srb <msrb@suse.com>
+Reviewed-by: Andy Ritger <aritger@nvidia.com>
+Signed-off-by: Adam Jackson <ajax@redhat.com>
+Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
+---
+ glx/glxcmds.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/glx/glxcmds.c b/glx/glxcmds.c
+index 009fd9b..ea42e2a 100644
+--- glx/glxcmds.c
++++ glx/glxcmds.c
+@@ -2062,7 +2062,7 @@ __glXDisp_Render(__GLXclientState * cl, GLbyte * pc)
+             extra = (*entry.varsize) (pc + __GLX_RENDER_HDR_SIZE,
+                                       client->swapped);
+             if (extra < 0) {
+-                extra = 0;
++                return BadLength;
+             }
+             if (cmdlen != __GLX_PAD(entry.bytes + extra)) {
+                 return BadLength;
+@@ -2179,7 +2179,7 @@ __glXDisp_RenderLarge(__GLXclientState * cl, GLbyte * pc)
+             extra = (*entry.varsize) (pc + __GLX_RENDER_LARGE_HDR_SIZE,
+                                       client->swapped);
+             if (extra < 0) {
+-                extra = 0;
++                return BadLength;
+             }
+             /* large command's header is 4 bytes longer, so add 4 */
+             if (cmdlen != __GLX_PAD(entry.bytes + 4 + extra)) {
+-- 
+2.1.2
+