4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael S. Tsirkin mst@redhat.com
commit 5c60300d68da32ca77f7f978039dc72bfc78b06b upstream.
When out of memory and we can't add ctrl vq buffers, probe fails. Unfortunately the error handling is out of spec: it calls del_vqs without bothering to reset the device first.
To fix, call the full cleanup function in this case.
Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin mst@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/char/virtio_console.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-)
--- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -2090,6 +2090,7 @@ static int virtcons_probe(struct virtio_
spin_lock_init(&portdev->ports_lock); INIT_LIST_HEAD(&portdev->ports); + INIT_LIST_HEAD(&portdev->list);
virtio_device_ready(portdev->vdev);
@@ -2107,8 +2108,15 @@ static int virtcons_probe(struct virtio_ if (!nr_added_bufs) { dev_err(&vdev->dev, "Error allocating buffers for control queue\n"); - err = -ENOMEM; - goto free_vqs; + /* + * The host might want to notify mgmt sw about device + * add failure. + */ + __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID, + VIRTIO_CONSOLE_DEVICE_READY, 0); + /* Device was functional: we need full cleanup. */ + virtcons_remove(vdev); + return -ENOMEM; } } else { /* @@ -2139,11 +2147,6 @@ static int virtcons_probe(struct virtio_
return 0;
-free_vqs: - /* The host might want to notify mgmt sw about device add failure */ - __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID, - VIRTIO_CONSOLE_DEVICE_READY, 0); - remove_vqs(portdev); free_chrdev: unregister_chrdev(portdev->chr_major, "virtio-portsdev"); free: