From a0c90ad34fa89e5358893701723bd2f96a4bd3b2 Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Sun, 26 Jan 2014 19:51:29 -0800
Subject: render: unvalidated lengths in Render extn. swapped procs
 [CVE-2014-8100 2/2]

v2: backport to nx-libs 3.6.x (Mike DePaulo)
v3: port to NXrender.c rather than render.c (Mike DePaulo)

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

Conflicts:
	render/render.c
---
 nx-X11/programs/Xserver/hw/nxagent/NXrender.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXrender.c b/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
index 8a0091042..c2f6527a6 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXrender.c
@@ -2532,6 +2532,7 @@ SProcRenderQueryVersion (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderQueryVersionReq);
+    REQUEST_SIZE_MATCH(xRenderQueryVersionReq);
 
     swaps(&stuff->length, n);
     swapl(&stuff->majorVersion, n);
@@ -2544,6 +2545,7 @@ SProcRenderQueryPictFormats (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderQueryPictFormatsReq);
+    REQUEST_SIZE_MATCH(xRenderQueryPictFormatsReq);
     swaps(&stuff->length, n);
     return (*ProcRenderVector[stuff->renderReqType]) (client);
 }
@@ -2553,6 +2555,7 @@ SProcRenderQueryPictIndexValues (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderQueryPictIndexValuesReq);
+    REQUEST_AT_LEAST_SIZE(xRenderQueryPictIndexValuesReq);
     swaps(&stuff->length, n);
     swapl(&stuff->format, n);
     return (*ProcRenderVector[stuff->renderReqType]) (client);
@@ -2569,6 +2572,7 @@ SProcRenderCreatePicture (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderCreatePictureReq);
+    REQUEST_AT_LEAST_SIZE(xRenderCreatePictureReq);
     swaps(&stuff->length, n);
     swapl(&stuff->pid, n);
     swapl(&stuff->drawable, n);
@@ -2583,6 +2587,7 @@ SProcRenderChangePicture (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderChangePictureReq);
+    REQUEST_AT_LEAST_SIZE(xRenderChangePictureReq);
     swaps(&stuff->length, n);
     swapl(&stuff->picture, n);
     swapl(&stuff->mask, n);
@@ -2595,6 +2600,7 @@ SProcRenderSetPictureClipRectangles (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderSetPictureClipRectanglesReq);
+    REQUEST_AT_LEAST_SIZE(xRenderSetPictureClipRectanglesReq);
     swaps(&stuff->length, n);
     swapl(&stuff->picture, n);
     SwapRestS(stuff);
@@ -2606,6 +2612,7 @@ SProcRenderFreePicture (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderFreePictureReq);
+    REQUEST_SIZE_MATCH(xRenderFreePictureReq);
     swaps(&stuff->length, n);
     swapl(&stuff->picture, n);
     return (*ProcRenderVector[stuff->renderReqType]) (client);
@@ -2616,6 +2623,7 @@ SProcRenderComposite (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderCompositeReq);
+    REQUEST_SIZE_MATCH(xRenderCompositeReq);
     swaps(&stuff->length, n);
     swapl(&stuff->src, n);
     swapl(&stuff->mask, n);
@@ -2636,6 +2644,7 @@ SProcRenderScale (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderScaleReq);
+    REQUEST_SIZE_MATCH(xRenderScaleReq);
     swaps(&stuff->length, n);
     swapl(&stuff->src, n);
     swapl(&stuff->dst, n);
@@ -2741,6 +2750,7 @@ SProcRenderCreateGlyphSet (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderCreateGlyphSetReq);
+    REQUEST_SIZE_MATCH(xRenderCreateGlyphSetReq);
     swaps(&stuff->length, n);
     swapl(&stuff->gsid, n);
     swapl(&stuff->format, n);
@@ -2752,6 +2762,7 @@ SProcRenderReferenceGlyphSet (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderReferenceGlyphSetReq);
+    REQUEST_SIZE_MATCH(xRenderReferenceGlyphSetReq);
     swaps(&stuff->length, n);
     swapl(&stuff->gsid, n);
     swapl(&stuff->existing, n);
@@ -2763,6 +2774,7 @@ SProcRenderFreeGlyphSet (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderFreeGlyphSetReq);
+    REQUEST_SIZE_MATCH(xRenderFreeGlyphSetReq);
     swaps(&stuff->length, n);
     swapl(&stuff->glyphset, n);
     return (*ProcRenderVector[stuff->renderReqType]) (client);
@@ -2777,6 +2789,7 @@ SProcRenderAddGlyphs (ClientPtr client)
     void    *end;
     xGlyphInfo *gi;
     REQUEST(xRenderAddGlyphsReq);
+    REQUEST_AT_LEAST_SIZE(xRenderAddGlyphsReq);
     swaps(&stuff->length, n);
     swapl(&stuff->glyphset, n);
     swapl(&stuff->nglyphs, n);
@@ -2813,6 +2826,7 @@ SProcRenderFreeGlyphs (ClientPtr client)
 {
     register int n;
     REQUEST(xRenderFreeGlyphsReq);
+    REQUEST_AT_LEAST_SIZE(xRenderFreeGlyphsReq);
     swaps(&stuff->length, n);
     swapl(&stuff->glyphset, n);
     SwapRestL(stuff);
@@ -2831,7 +2845,8 @@ SProcRenderCompositeGlyphs (ClientPtr client)
     int		size;
     
     REQUEST(xRenderCompositeGlyphsReq);
-    
+    REQUEST_AT_LEAST_SIZE(xRenderCompositeGlyphsReq);
+
     switch (stuff->renderReqType) {
     default:			    size = 1; break;
     case X_RenderCompositeGlyphs16: size = 2; break;
-- 
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