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vhost-user-gpu: fix memory disclosure in virgl_cmd_get_capset_info (CVE-2021-3545)

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Fix CVE-2021-3544

Otherwise some of the 'resp' will be leaked to guest.

Fixes: CVE-2021-3545
Reported-by: default avatarLi Qiang <liq3ea@163.com>
virtio-gpu fix: 42a8dadc

 ("virtio-gpu: fix information leak
in getting capset info dispatch")
Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-2-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
This commit is contained in:
Chen Qun 2021-06-15 10:11:17 +08:00
parent 9d962afa84
commit d37a5b33e7
1 changed files with 44 additions and 0 deletions
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44
vhost-user-gpu-fix-memory-disclosure-in-virgl_cmd_ge.patch Normal file
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@ -0,0 +1,44 @@
From 511cac8cbc60fafdae2589d674b7aeab15388eef Mon Sep 17 00:00:00 2001
From: Li Qiang <liq3ea@163.com>
Date: Tue, 15 Jun 2021 10:11:17 +0800
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
Fix CVE-2021-3544
Otherwise some of the 'resp' will be leaked to guest.
Fixes: CVE-2021-3545
Reported-by: default avatarLi Qiang <liq3ea@163.com>
virtio-gpu fix: 42a8dadc
("virtio-gpu: fix information leak
in getting capset info dispatch")
Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-2-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
---
contrib/vhost-user-gpu/virgl.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/contrib/vhost-user-gpu/virgl.c b/contrib/vhost-user-gpu/virgl.c
index 79556df094..44e79ab82a 100644
--- a/contrib/vhost-user-gpu/virgl.c
+++ b/contrib/vhost-user-gpu/virgl.c
@@ -131,6 +131,7 @@ 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,
--
2.27.0