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authorStefano Garzarella <sgarzare@redhat.com>2022-03-23 18:36:23 +0100
committerJakub Kicinski <kuba@kernel.org>2022-03-24 18:36:35 -0700
commit4b5f1ad5566ada230aaa2ce861b28d1895f1ea68 (patch)
tree7b62e09c1ff7f9d7d671517eec422846231ee630 /net
parent9fe087dda5bf097007b263664051bc0e84f6580d (diff)
downloadlinux-4b5f1ad5566ada230aaa2ce861b28d1895f1ea68.tar.bz2
vsock/virtio: initialize vdev->priv before using VQs
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>
Diffstat (limited to 'net')
-rw-r--r--net/vmw_vsock/virtio_transport.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 5afc194a58bb..3e5513934c9f 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);