| Message ID | 20210505045824.33880-8-liq3ea@163.com |
|---|---|
| State | New |
| Headers | show |
| Series | vhost-user-gpu: fix several security issues | expand |
+-- On Tue, 4 May 2021, Li Qiang wrote --+
| If 'virgl_cmd_get_capset' set 'max_size' to 0,
| the 'virgl_renderer_fill_caps' will write the data after the 'resp'.
| This patch avoid this by checking the returned 'max_size'.
|
| Signed-off-by: Li Qiang <liq3ea@163.com>
| ---
| contrib/vhost-user-gpu/virgl.c | 4 ++++
| 1 file changed, 4 insertions(+)
|
| diff --git a/contrib/vhost-user-gpu/virgl.c b/contrib/vhost-user-gpu/virgl.c
| index a16a311d80..7172104b19 100644
| --- a/contrib/vhost-user-gpu/virgl.c
| +++ b/contrib/vhost-user-gpu/virgl.c
| @@ -177,6 +177,10 @@ virgl_cmd_get_capset(VuGpu *g,
|
| virgl_renderer_get_cap_set(gc.capset_id, &max_ver,
| &max_size);
| + if (!max_size) {
| + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
| + return;
| + }
| resp = g_malloc0(sizeof(*resp) + max_size);
|
| resp->hdr.type = VIRTIO_GPU_RESP_OK_CAPSET;
* Looks okay.
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Thank you.
--
- P J P
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
diff --git a/contrib/vhost-user-gpu/virgl.c b/contrib/vhost-user-gpu/virgl.c index a16a311d80..7172104b19 100644 --- a/contrib/vhost-user-gpu/virgl.c +++ b/contrib/vhost-user-gpu/virgl.c @@ -177,6 +177,10 @@ virgl_cmd_get_capset(VuGpu *g, virgl_renderer_get_cap_set(gc.capset_id, &max_ver, &max_size); + if (!max_size) { + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; + return; + } resp = g_malloc0(sizeof(*resp) + max_size); resp->hdr.type = VIRTIO_GPU_RESP_OK_CAPSET;
If 'virgl_cmd_get_capset' set 'max_size' to 0, the 'virgl_renderer_fill_caps' will write the data after the 'resp'. This patch avoid this by checking the returned 'max_size'. Signed-off-by: Li Qiang <liq3ea@163.com> --- contrib/vhost-user-gpu/virgl.c | 4 ++++ 1 file changed, 4 insertions(+)