diff options
| author | Stefano Garzarella <sgarzare@redhat.com> | 2022-03-23 20:36:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:23:51 +0300 |
| commit | 10c6cb867ffa827a8364d0c481ec1438cd594652 (patch) | |
| tree | c20d59a54451595e23dcdc1009ab536f71b05670 /net | |
| parent | c07a9d2a1d1d4aa903c92032258531995fb211eb (diff) | |
| download | linux-10c6cb867ffa827a8364d0c481ec1438cd594652.tar.xz | |
vsock/virtio: initialize vdev->priv before using VQs
[ Upstream commit 4b5f1ad5566ada230aaa2ce861b28d1895f1ea68 ]
When we fill VQs with empty buffers and kick the host, it may send
an interrupt. `vdev->priv` must be initialized before this since it
is used in the virtqueue callbacks.
Fixes: 0deab087b16a ("vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock")
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/vmw_vsock/virtio_transport.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c index dad9ca65f4f9..fb1b8f99f679 100644 --- a/net/vmw_vsock/virtio_transport.c +++ b/net/vmw_vsock/virtio_transport.c @@ -622,6 +622,8 @@ static int virtio_vsock_probe(struct virtio_device *vdev) INIT_WORK(&vsock->event_work, virtio_transport_event_work); INIT_WORK(&vsock->send_pkt_work, virtio_transport_send_pkt_work); + vdev->priv = vsock; + mutex_lock(&vsock->tx_lock); vsock->tx_run = true; mutex_unlock(&vsock->tx_lock); @@ -639,7 +641,6 @@ static int virtio_vsock_probe(struct virtio_device *vdev) if (virtio_has_feature(vdev, VIRTIO_VSOCK_F_SEQPACKET)) vsock->seqpacket_allow = true; - vdev->priv = vsock; rcu_assign_pointer(the_virtio_vsock, vsock); mutex_unlock(&the_virtio_vsock_mutex); |