X-Git-Url: https://git.piment-noir.org/?p=deb_xorg-server.git;a=blobdiff_plain;f=debian%2Fpatches%2FCVE-2014-8xxx%2F0022-glx-Additional-paranoia-in-__glXGetAnswerBuffer-__GL.patch;fp=debian%2Fpatches%2FCVE-2014-8xxx%2F0022-glx-Additional-paranoia-in-__glXGetAnswerBuffer-__GL.patch;h=3357e9b7e301d322233a1ef124cc8fc25fb353a5;hp=0000000000000000000000000000000000000000;hb=7217e0ca50bba73dad94782e67980aeeb24ab693;hpb=a09e091a5c996d46a398abb27b06fe504591673f

diff --git a/debian/patches/CVE-2014-8xxx/0022-glx-Additional-paranoia-in-__glXGetAnswerBuffer-__GL.patch b/debian/patches/CVE-2014-8xxx/0022-glx-Additional-paranoia-in-__glXGetAnswerBuffer-__GL.patch
new file mode 100644
index 0000000..3357e9b
--- /dev/null
+++ b/debian/patches/CVE-2014-8xxx/0022-glx-Additional-paranoia-in-__glXGetAnswerBuffer-__GL.patch
@@ -0,0 +1,59 @@
+From 902b6a30c660f4b38afd936726071b631ada3fcf Mon Sep 17 00:00:00 2001
+From: Adam Jackson <ajax@redhat.com>
+Date: Mon, 10 Nov 2014 12:13:38 -0500
+Subject: [PATCH 22/33] glx: Additional paranoia in __glXGetAnswerBuffer /
+ __GLX_GET_ANSWER_BUFFER (v2) [CVE-2014-8093 3/6]
+
+If the computed reply size is negative, something went wrong, treat it
+as an error.
+
+v2: Be more careful about size_t being unsigned (Matthieu Herrb)
+v3: SIZE_MAX not SIZE_T_MAX (Alan Coopersmith)
+
+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/indirect_util.c |    7 ++++++-
+ glx/unpack.h        |    3 ++-
+ 2 files changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/glx/indirect_util.c b/glx/indirect_util.c
+index 926e57c..de81491 100644
+--- a/glx/indirect_util.c
++++ b/glx/indirect_util.c
+@@ -76,9 +76,14 @@ __glXGetAnswerBuffer(__GLXclientState * cl, size_t required_size,
+     const unsigned mask = alignment - 1;
+ 
+     if (local_size < required_size) {
+-        const size_t worst_case_size = required_size + alignment;
++        size_t worst_case_size;
+         intptr_t temp_buf;
+ 
++        if (required_size < SIZE_MAX - alignment)
++            worst_case_size = required_size + alignment;
++        else
++            return NULL;
++
+         if (cl->returnBufSize < worst_case_size) {
+             void *temp = realloc(cl->returnBuf, worst_case_size);
+ 
+diff --git a/glx/unpack.h b/glx/unpack.h
+index 52fba74..2b1ebcf 100644
+--- a/glx/unpack.h
++++ b/glx/unpack.h
+@@ -83,7 +83,8 @@ extern xGLXSingleReply __glXReply;
+ ** pointer.
+ */
+ #define __GLX_GET_ANSWER_BUFFER(res,cl,size,align)			 \
+-    if ((size) > sizeof(answerBuffer)) {				 \
++    if (size < 0) return BadLength;                                      \
++    else if ((size) > sizeof(answerBuffer)) {				 \
+ 	int bump;							 \
+ 	if ((cl)->returnBufSize < (size)+(align)) {			 \
+ 	    (cl)->returnBuf = (GLbyte*)realloc((cl)->returnBuf,	 	 \
+-- 
+1.7.9.2
+