[dpdk-stable] [PATCH] vhost: fix device leak on connection add failure

[Ilya Maximets]

Need to destroy allocated device if application fails to
add new connection or we have fdset failure.

Fixes: acbff5c67ea7 ("vhost: fix crash when exceeding file descriptors")
Fixes: efba12a78ddf ("vhost: add user callbacks for socket open/close")
Cc: stable at dpdk.org

Reported-by: David Marchand <david.marchand at redhat.com>
Signed-off-by: Ilya Maximets <i.maximets at samsung.com>
---
 lib/librte_vhost/socket.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
index 43f091d10..c34668004 100644
--- a/lib/librte_vhost/socket.c
+++ b/lib/librte_vhost/socket.c
@@ -240,7 +240,7 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 			RTE_LOG(ERR, VHOST_CONFIG,
 				"failed to add vhost user connection with fd %d\n",
 				fd);
-			goto err;
+			goto err_cleanup;
 		}
 	}
 
@@ -257,7 +257,7 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 		if (vsocket->notify_ops->destroy_connection)
 			vsocket->notify_ops->destroy_connection(conn->vid);
 
-		goto err;
+		goto err_cleanup;
 	}
 
 	pthread_mutex_lock(&vsocket->conn_mutex);
@@ -267,6 +267,8 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 	fdset_pipe_notify(&vhost_user.fdset);
 	return;
 
+err_cleanup:
+	vhost_destroy_device(vid);
 err:
 	free(conn);
 	close(fd);
-- 
2.17.1