vhost_net: correct error handling in vhost_net_set_backend()

Currently, when vhost_init_used() fails the sock refcnt and ubufs were
leaked. Correct this by calling vhost_init_used() before assign ubufs and
restore the oldsock when it fails.

Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
1 file changed