xserver-xorg: fix CVE-2020-14347

(From OE-Core rev: 02484c21042fcbd31d2982fc1cf60d565ae035e4)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch
new file mode 100644
index 0000000000..cf3f5f9417
--- /dev/null
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch
@@ -0,0 +1,38 @@
+From aac28e162e5108510065ad4c323affd6deffd816 Mon Sep 17 00:00:00 2001
+From: Matthieu Herrb <matthieu@herrb.eu>
+Date: Sat, 25 Jul 2020 19:33:50 +0200
+Subject: [PATCH] fix for ZDI-11426
+
+Avoid leaking un-initalized memory to clients by zeroing the
+whole pixmap on initial allocation.
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
+Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
+
+
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/aac28e162e5108510065ad4c323affd6deffd816]
+CVE: CVE-2020-14347
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ dix/pixmap.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/dix/pixmap.c b/dix/pixmap.c
+index 1186d7dbbf..5a0146bbb6 100644
+--- a/dix/pixmap.c
++++ b/dix/pixmap.c
+@@ -116,7 +116,7 @@ AllocatePixmap(ScreenPtr pScreen, int pixDataSize)
+     if (pScreen->totalPixmapSize > ((size_t) - 1) - pixDataSize)
+         return NullPixmap;
+ 
+-    pPixmap = malloc(pScreen->totalPixmapSize + pixDataSize);
++    pPixmap = calloc(1, pScreen->totalPixmapSize + pixDataSize);
+     if (!pPixmap)
+         return NullPixmap;
+ 
+-- 
+GitLab
+
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.8.bb b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.8.bb
index 3f7fbe85b8..5101134538 100644
--- a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.8.bb
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.8.bb
@@ -5,6 +5,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat
            file://0001-test-xtest-Initialize-array-with-braces.patch \
            file://sdksyms-no-build-path.patch \
            file://0001-drmmode_display.c-add-missing-mi.h-include.patch \
+           file://CVE-2020-14347.patch \
            "
 SRC_URI[md5sum] = "a770aec600116444a953ff632f51f839"
 SRC_URI[sha256sum] = "d17b646bee4ba0fb7850c1cc55b18e3e8513ed5c02bdf38da7e107f84e2d0146"