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From 121841b25d72d13f8cad554363138c360f1250ea Mon Sep 17 00:00:00 2001
From: Li Qiang <liq3ea@163.com>
Date: Sat, 15 May 2021 20:03:56 -0700
Subject: [PATCH] vhost-user-gpu: fix memory disclosure in
virgl_cmd_get_capset_info (CVE-2021-3545)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Otherwise some of the 'resp' will be leaked to guest.
Fixes: CVE-2021-3545
Reported-by: Li Qiang <liq3ea@163.com>
virtio-gpu fix: 42a8dadc74 ("virtio-gpu: fix information leak
in getting capset info dispatch")
Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-2-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Upstream-Status: Backport
CVE: CVE-2021-3545
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
contrib/vhost-user-gpu/virgl.c | 1 +
1 file changed, 1 insertion(+)
Index: qemu-4.2.0/contrib/vhost-user-gpu/virgl.c
===================================================================
--- qemu-4.2.0.orig/contrib/vhost-user-gpu/virgl.c
+++ qemu-4.2.0/contrib/vhost-user-gpu/virgl.c
@@ -132,6 +132,7 @@ virgl_cmd_get_capset_info(VuGpu *g,
VUGPU_FILL_CMD(info);
+ memset(&resp, 0, sizeof(resp));
if (info.capset_index == 0) {
resp.capset_id = VIRTIO_GPU_CAPSET_VIRGL;
virgl_renderer_get_cap_set(resp.capset_id,
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