| 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 |
| |