From ad29acd7697e18333e164b1746f61c5a9e29a436 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Mon, 10 Nov 2014 12:13:44 -0500
Subject: [PATCH 37/40] glx: Top-level length checking for swapped
 VendorPrivate requests [CVE-2014-8098 4/8]

v2: backport to nx-libs 3.6.x (Mike DePaulo)

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>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c b/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c
index 7174fda..2685355 100644
--- a/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c
+++ b/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c
@@ -797,10 +797,12 @@ int __glXSwapRenderLarge(__GLXclientState *cl, GLbyte *pc)
 
 int __glXSwapVendorPrivate(__GLXclientState *cl, GLbyte *pc)
 {
+    ClientPtr client = cl->client;
     xGLXVendorPrivateReq *req;
     GLint vendorcode;
 
     __GLX_DECLARE_SWAP_VARIABLES;
+    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateReq);
 
     req = (xGLXVendorPrivateReq *) pc;
     __GLX_SWAP_SHORT(&req->length);
@@ -835,10 +837,12 @@ int __glXSwapVendorPrivate(__GLXclientState *cl, GLbyte *pc)
 
 int __glXSwapVendorPrivateWithReply(__GLXclientState *cl, GLbyte *pc)
 {
+    ClientPtr client = cl->client;
     xGLXVendorPrivateWithReplyReq *req;
     GLint vendorcode;
 
     __GLX_DECLARE_SWAP_VARIABLES;
+    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateWithReplyReq);
 
     req = (xGLXVendorPrivateWithReplyReq *) pc;
     __GLX_SWAP_SHORT(&req->length);
-- 
2.1.4