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authorKai Kang <kai.kang@windriver.com>2014-04-01 17:09:50 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-04-01 11:25:47 +0100
commit059dc5f4ef9bcf49cb6520f5f2ab1e739f4d42de (patch)
treee984f5c681bd1cfad55f594bf21ca62ec52ece7c
parentc93eeecb15c4acac9226a3394c93d7e99a809d6b (diff)
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xorg: Fix for CVE-2013-6424
Integer underflow in the xTrapezoidValid macro in render/picture.h in X.Org allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-6424 Signed-off-by: Baogen Shang <baogen.shang@windriver.com> Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-graphics/xorg-xserver/xserver-xorg/xorg-CVE-2013-6424.patch31
-rw-r--r--meta/recipes-graphics/xorg-xserver/xserver-xorg_1.15.0.bb1
2 files changed, 32 insertions, 0 deletions
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/xorg-CVE-2013-6424.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/xorg-CVE-2013-6424.patch
new file mode 100644
index 0000000000..7c6153022f
--- /dev/null
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/xorg-CVE-2013-6424.patch
@@ -0,0 +1,31 @@
+This patch comes from:
+http://lists.x.org/archives/xorg-devel/2013-October/037996.html
+
+Upstream-Status: Backport
+
+Signed-off-by: Baogen shang <baogen.shang@windriver.com>
+diff -Naur xorg-server-1.14.0-orig/exa/exa_render.c xorg-server-1.14.0/exa/exa_render.c
+--- xorg-server-1.14.0-orig/exa/exa_render.c 2014-02-27 14:32:38.000000000 +0800
++++ xorg-server-1.14.0/exa/exa_render.c 2014-02-27 15:46:59.000000000 +0800
+@@ -1141,7 +1141,8 @@
+
+ exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+ for (; ntrap; ntrap--, traps++)
+- (*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1);
++ if (xTrapezoidValid(traps))
++ (*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1);
+ exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+
+ xRel = bounds.x1 + xSrc - xDst;
+diff -Naur xorg-server-1.14.0-orig/render/picture.h xorg-server-1.14.0/render/picture.h
+--- xorg-server-1.14.0-orig/render/picture.h 2014-02-27 14:32:26.000000000 +0800
++++ xorg-server-1.14.0/render/picture.h 2014-02-27 15:48:13.000000000 +0800
+@@ -211,7 +211,7 @@
+ /* whether 't' is a well defined not obviously empty trapezoid */
+ #define xTrapezoidValid(t) ((t)->left.p1.y != (t)->left.p2.y && \
+ (t)->right.p1.y != (t)->right.p2.y && \
+- (int) ((t)->bottom - (t)->top) > 0)
++ ((t)->bottom > (t)->top))
+
+ /*
+ * Standard NTSC luminance conversions:
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.15.0.bb b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.15.0.bb
index a4dda4e7aa..1f9fa04c8d 100644
--- a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.15.0.bb
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.15.0.bb
@@ -5,6 +5,7 @@ SRC_URI += "file://crosscompile.patch \
file://fix_open_max_preprocessor_error.patch \
file://mips64-compiler.patch \
file://aarch64.patch \
+ file://xorg-CVE-2013-6424.patch \
"
SRC_URI[md5sum] = "c2ace3697b32414094cf8c597c39d7d9"