1 files changed, 48 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/0003-vhost-user-gpu-fix-memory-leak-in-vg_resource_attach.patch b/meta/recipes-devtools/qemu/qemu/0003-vhost-user-gpu-fix-memory-leak-in-vg_resource_attach.patch
new file mode 100644
index 0000000000..1718486405
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/0003-vhost-user-gpu-fix-memory-leak-in-vg_resource_attach.patch
@@ -0,0 +1,48 @@
+CVE: CVE-2021-3544
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+From b9f79858a614d95f5de875d0ca31096eaab72c3b Mon Sep 17 00:00:00 2001
+From: Li Qiang <liq3ea@163.com>
+Date: Sat, 15 May 2021 20:03:58 -0700
+Subject: [PATCH 3/7] vhost-user-gpu: fix memory leak in
+ vg_resource_attach_backing (CVE-2021-3544)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Check whether the 'res' has already been attach_backing to avoid
+memory leak.
+
+Fixes: CVE-2021-3544
+Reported-by: Li Qiang <liq3ea@163.com>
+virtio-gpu fix: 204f01b309 ("virtio-gpu: fix memory leak
+in resource attach backing")
+
+Signed-off-by: Li Qiang <liq3ea@163.com>
+Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
+Message-Id: <20210516030403.107723-4-liq3ea@163.com>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ contrib/vhost-user-gpu/vhost-user-gpu.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
+index b5e153d0d6..0437e52b64 100644
+--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
++++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
+@@ -489,6 +489,11 @@ vg_resource_attach_backing(VuGpu *g,
+         return;
+     }
+ 
++    if (res->iov) {
++        cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
++        return;
++    }
++
+     ret = vg_create_mapping_iov(g, &ab, cmd, &res->iov);
+     if (ret != 0) {
+         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
+-- 
+2.25.1
+