qemu: fix virtio vhost-user-gpu CVEs

Fix a slew of CVEs (CVE-2021-3544, CVE-2021-3545, CVE-2021-3546) by
backporting the relevant patches from qemu's git.

(From OE-Core rev: ce850a5ce84f949d3114024c89ae3dd98fcbef41)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit ce850a5ce84f949d3114024c89ae3dd98fcbef41)
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/0004-vhost-user-gpu-fix-memory-leak-while-calling-vg_reso.patch b/meta/recipes-devtools/qemu/qemu/0004-vhost-user-gpu-fix-memory-leak-while-calling-vg_reso.patch
new file mode 100644
index 0000000000..9fc2fafe1d
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/0004-vhost-user-gpu-fix-memory-leak-while-calling-vg_reso.patch
@@ -0,0 +1,50 @@
+CVE: CVE-2021-3544
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+From b7afebcf9e6ecf3cf9b5a9b9b731ed04bca6aa3e Mon Sep 17 00:00:00 2001
+From: Li Qiang <liq3ea@163.com>
+Date: Sat, 15 May 2021 20:03:59 -0700
+Subject: [PATCH 4/7] vhost-user-gpu: fix memory leak while calling
+ 'vg_resource_unref' (CVE-2021-3544)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+If the guest trigger following sequences, the attach_backing will be leaked:
+
+	vg_resource_create_2d
+	vg_resource_attach_backing
+	vg_resource_unref
+
+This patch fix this by freeing 'res->iov' in vg_resource_destroy.
+
+Fixes: CVE-2021-3544
+Reported-by: Li Qiang <liq3ea@163.com>
+virtio-gpu fix: 5e8e3c4c75 ("virtio-gpu: fix resource leak
+in virgl_cmd_resource_unref")
+
+Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Li Qiang <liq3ea@163.com>
+Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
+Message-Id: <20210516030403.107723-5-liq3ea@163.com>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ contrib/vhost-user-gpu/vhost-user-gpu.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
+index 0437e52b64..770dfad529 100644
+--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
++++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
+@@ -400,6 +400,7 @@ vg_resource_destroy(VuGpu *g,
+     }
+ 
+     vugbm_buffer_destroy(&res->buffer);
++    g_free(res->iov);
+     pixman_image_unref(res->image);
+     QTAILQ_REMOVE(&g->reslist, res, next);
+     g_free(res);
+-- 
+2.25.1
+