qemu: fix CVE-2019-12155

(From OE-Core rev: a0236a8f682ab0e897cd99555b9225bae4fb04ab)

Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/qemu/qemu.inc

@@ -24,6 +24,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://0009-linux-user-Fix-webkitgtk-hangs-on-32-bit-x86-target.patch \
            file://0010-Revert-linux-user-fix-mmap-munmap-mprotect-mremap-sh.patch \
            file://0013-target-arm-Fix-vector-operation-segfault.patch \
+	   file://CVE-2019-12155.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 

meta/recipes-devtools/qemu/qemu/CVE-2019-12155.patch

@@ -0,0 +1,35 @@
+From d52680fc932efb8a2f334cc6993e705ed1e31e99 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Thu, 25 Apr 2019 12:05:34 +0530
+Subject: [PATCH] qxl: check release info object
+
+When releasing spice resources in release_resource() routine,
+if release info object 'ext.info' is null, it leads to null
+pointer dereference. Add check to avoid it.
+
+Reported-by: Bugs SysSec <bugs-syssec@rub.de>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Message-id: 20190425063534.32747-1-ppandit@redhat.com
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+
+Upstream-Status: Backport
+CVE: CVE-2019-12155
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+---
+ hw/display/qxl.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/hw/display/qxl.c b/hw/display/qxl.c
+index c8ce5781e03..632923add23 100644
+--- a/hw/display/qxl.c
++++ b/hw/display/qxl.c
+@@ -777,6 +777,9 @@ static void interface_release_resource(QXLInstance *sin,
+     QXLReleaseRing *ring;
+     uint64_t *item, id;
+ 
++    if (!ext.info) {
++        return;
++    }
+     if (ext.group_id == MEMSLOT_GROUP_HOST) {
+         /* host group -> vga mode update request */
+         QXLCommandExt *cmdext = (void *)(intptr_t)(ext.info->id);