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From 8931066077a04999d973932e04da577bd6906c82 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Mon, 10 Nov 2014 12:13:47 -0500
Subject: [PATCH 38/40] glx: Length checking for non-generated single requests
(v2) [CVE-2014-8098 7/8]
v2:
Fix single versus vendor-private length checking for ARB_imaging subset
extensions. (Julien Cristau)
v3:
Fix single versus vendor-private length checking for ARB_imaging subset
extensions. (Julien Cristau)
v4: backport to nx-libs 3.6.x (Mike DePaulo)
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: Julien Cristau <jcristau@debian.org>
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>
fix safe_Add
---
nx-X11/programs/Xserver/GL/glx/single2.c | 21 +++++++++++++++------
nx-X11/programs/Xserver/GL/glx/single2swap.c | 15 +++++++++++----
nx-X11/programs/Xserver/GL/glx/singlepix.c | 19 ++++++++++++++-----
nx-X11/programs/Xserver/GL/glx/singlepixswap.c | 17 ++++++++++++-----
4 files changed, 52 insertions(+), 20 deletions(-)
--- a/nx-X11/programs/Xserver/GL/glx/single2.c
+++ b/nx-X11/programs/Xserver/GL/glx/single2.c
@@ -48,11 +48,14 @@
int __glXDisp_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
GLsizei size;
GLenum type;
__GLXcontext *cx;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 8);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -78,10 +81,12 @@ int __glXDisp_FeedbackBuffer(__GLXclient
int __glXDisp_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
GLsizei size;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -106,7 +111,7 @@ int __glXDisp_SelectBuffer(__GLXclientSt
int __glXDisp_RenderMode(__GLXclientState *cl, GLbyte *pc)
{
- ClientPtr client;
+ ClientPtr client = cl->client;
xGLXRenderModeReply reply;
__GLXcontext *cx;
GLint nitems=0, retBytes=0, retval, newModeCheck;
@@ -114,6 +119,8 @@ int __glXDisp_RenderMode(__GLXclientStat
GLenum newMode;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -188,7 +195,6 @@ int __glXDisp_RenderMode(__GLXclientStat
** selection array, as per the API for glRenderMode itself.
*/
noChangeAllowed:;
- client = cl->client;
reply.length = nitems;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
@@ -204,9 +210,11 @@ int __glXDisp_RenderMode(__GLXclientStat
int __glXDisp_Flush(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
int error;
+ REQUEST_SIZE_MATCH(xGLXSingleReq);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -219,10 +227,11 @@ int __glXDisp_Flush(__GLXclientState *cl
int __glXDisp_Finish(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
- ClientPtr client;
int error;
+ REQUEST_SIZE_MATCH(xGLXSingleReq);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -233,7 +242,6 @@ int __glXDisp_Finish(__GLXclientState *c
__GLX_NOTE_FLUSHED_CMDS(cx);
/* Send empty reply packet to indicate finish is finished */
- client = cl->client;
__GLX_BEGIN_REPLY(0);
__GLX_SEND_HEADER();
return Success;
@@ -302,7 +310,7 @@ char *__glXcombine_strings(const char *c
int DoGetString(__GLXclientState *cl, GLbyte *pc, GLboolean need_swap)
{
- ClientPtr client;
+ ClientPtr client = cl->client;
__GLXcontext *cx;
GLenum name;
const char *string;
@@ -311,6 +319,8 @@ int DoGetString(__GLXclientState *cl, GL
char *buf = NULL, *buf1 = NULL;
GLint length = 0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
+
/* If the client has the opposite byte order, swap the contextTag and
* the name.
*/
@@ -327,7 +337,6 @@ int DoGetString(__GLXclientState *cl, GL
pc += __GLX_SINGLE_HDR_SIZE;
name = *(GLenum *)(pc + 0);
string = (const char *)glGetString(name);
- client = cl->client;
/*
** Restrict extensions to those that are supported by both the
--- a/nx-X11/programs/Xserver/GL/glx/single2swap.c
+++ b/nx-X11/programs/Xserver/GL/glx/single2swap.c
@@ -48,12 +48,14 @@
int __glXDispSwap_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
GLsizei size;
GLenum type;
__GLX_DECLARE_SWAP_VARIABLES;
__GLXcontext *cx;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 8);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -82,11 +84,13 @@ int __glXDispSwap_FeedbackBuffer(__GLXcl
int __glXDispSwap_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
GLsizei size;
__GLX_DECLARE_SWAP_VARIABLES;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -113,7 +117,7 @@ int __glXDispSwap_SelectBuffer(__GLXclie
int __glXDispSwap_RenderMode(__GLXclientState *cl, GLbyte *pc)
{
- ClientPtr client;
+ ClientPtr client = cl->client;
__GLXcontext *cx;
xGLXRenderModeReply reply;
GLint nitems=0, retBytes=0, retval, newModeCheck;
@@ -123,6 +127,8 @@ int __glXDispSwap_RenderMode(__GLXclient
__GLX_DECLARE_SWAP_ARRAY_VARIABLES;
int error;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
+
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -201,7 +207,6 @@ int __glXDispSwap_RenderMode(__GLXclient
** selection array, as per the API for glRenderMode itself.
*/
noChangeAllowed:;
- client = cl->client;
reply.length = nitems;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
@@ -222,10 +227,12 @@ int __glXDispSwap_RenderMode(__GLXclient
int __glXDispSwap_Flush(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
int error;
__GLX_DECLARE_SWAP_VARIABLES;
+ REQUEST_SIZE_MATCH(xGLXSingleReq);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -239,11 +246,12 @@ int __glXDispSwap_Flush(__GLXclientState
int __glXDispSwap_Finish(__GLXclientState *cl, GLbyte *pc)
{
+ ClientPtr client = cl->client;
__GLXcontext *cx;
- ClientPtr client;
int error;
__GLX_DECLARE_SWAP_VARIABLES;
+ REQUEST_SIZE_MATCH(xGLXSingleReq);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -255,7 +263,6 @@ int __glXDispSwap_Finish(__GLXclientStat
__GLX_NOTE_FLUSHED_CMDS(cx);
/* Send empty reply packet to indicate finish is finished */
- client = cl->client;
__GLX_BEGIN_REPLY(0);
__GLX_PUT_RETVAL(0);
__GLX_SWAP_REPLY_HEADER();
--- a/nx-X11/programs/Xserver/GL/glx/singlepix.c
+++ b/nx-X11/programs/Xserver/GL/glx/singlepix.c
@@ -57,6 +57,8 @@ int __glXDisp_ReadPixels(__GLXclientStat
int error;
char *answer, answerBuffer[200];
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 28);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -108,6 +110,7 @@ int __glXDisp_GetTexImage(__GLXclientSta
char *answer, answerBuffer[200];
GLint width=0, height=0, depth=1;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 20);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -204,6 +207,7 @@ int __glXDisp_GetSeparableFilter(__GLXcl
char *answer, answerBuffer[200];
GLint width=0, height=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -227,13 +231,11 @@ int __glXDisp_GetSeparableFilter(__GLXcl
compsize = __glGetTexImage_size(target,1,format,type,width,1,1);
compsize2 = __glGetTexImage_size(target,1,format,type,height,1,1);
- if (compsize < 0) return BadLength;
- if (compsize2 < 0) compsize2 = 0;
- compsize = __GLX_PAD(compsize);
- compsize2 = __GLX_PAD(compsize2);
+ if ((compsize = safe_pad(compsize)) < 0) return BadLength;
+ if ((compsize2 = safe_pad(compsize2)) < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
- __GLX_GET_ANSWER_BUFFER(answer,cl,compsize + compsize2,1);
+ __GLX_GET_ANSWER_BUFFER(answer,cl,safe_add(compsize, compsize2),1);
__glXClearErrorOccured();
glGetSeparableFilter(
*(GLenum *)(pc + 0),
@@ -269,6 +271,7 @@ int __glXDisp_GetConvolutionFilter(__GLX
char *answer, answerBuffer[200];
GLint width=0, height=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -328,6 +331,8 @@ int __glXDisp_GetHistogram(__GLXclientSt
char *answer, answerBuffer[200];
GLint width=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -376,6 +381,8 @@ int __glXDisp_GetMinmax(__GLXclientState
int error;
char *answer, answerBuffer[200];
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -419,6 +426,8 @@ int __glXDisp_GetColorTable(__GLXclientS
char *answer, answerBuffer[200];
GLint width=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
+
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
--- a/nx-X11/programs/Xserver/GL/glx/singlepixswap.c
+++ b/nx-X11/programs/Xserver/GL/glx/singlepixswap.c
@@ -58,6 +58,8 @@ int __glXDispSwap_ReadPixels(__GLXclient
int error;
char *answer, answerBuffer[200];
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 28);
+
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -120,6 +122,7 @@ int __glXDispSwap_GetTexImage(__GLXclien
char *answer, answerBuffer[200];
GLint width=0, height=0, depth=1;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 24);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -190,6 +193,7 @@ int __glXDispSwap_GetPolygonStipple(__GL
char *answer;
__GLX_DECLARE_SWAP_VARIABLES;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 4);
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
@@ -230,6 +234,7 @@ int __glXDispSwap_GetSeparableFilter(__G
char *answer, answerBuffer[200];
GLint width=0, height=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -257,13 +262,11 @@ int __glXDispSwap_GetSeparableFilter(__G
compsize = __glGetTexImage_size(target,1,format,type,width,1,1);
compsize2 = __glGetTexImage_size(target,1,format,type,height,1,1);
- if (compsize < 0) return BadLength;
- if (compsize2 < 0) compsize2 = 0;
- compsize = __GLX_PAD(compsize);
- compsize2 = __GLX_PAD(compsize2);
+ if ((compsize = safe_pad(compsize)) < 0) return BadLength;
+ if ((compsize2 = safe_pad(compsize2)) < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
- __GLX_GET_ANSWER_BUFFER(answer,cl,compsize + compsize2,1);
+ __GLX_GET_ANSWER_BUFFER(answer,cl,safe_add(compsize, compsize2),1);
__glXClearErrorOccured();
glGetSeparableFilter(
*(GLenum *)(pc + 0),
@@ -302,6 +305,7 @@ int __glXDispSwap_GetConvolutionFilter(_
char *answer, answerBuffer[200];
GLint width=0, height=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -368,6 +372,7 @@ int __glXDispSwap_GetHistogram(__GLXclie
char *answer, answerBuffer[200];
GLint width=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -422,6 +427,7 @@ int __glXDispSwap_GetMinmax(__GLXclientS
__GLX_DECLARE_SWAP_VARIABLES;
char *answer, answerBuffer[200];
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
@@ -470,6 +476,7 @@ int __glXDispSwap_GetColorTable(__GLXcli
char *answer, answerBuffer[200];
GLint width=0;
+ REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
|
