rds: tcp: use sock_create_lite() to create the accept socket

There are two problems with calling sock_create_kern() from
rds_tcp_accept_one()
1. it sets up a new_sock->sk that is wasteful, because this ->sk
   is going to get replaced by inet_accept() in the subsequent ->accept()
2. The new_sock->sk is a leaked reference in sock_graft() which
   expects to find a null parent->sk

Avoid these problems by calling sock_create_lite().

Orabug: 26477756

Signed-off-by: Sowmini Varadhan <[email protected]>
Acked-by: Santosh Shilimkar <[email protected]>
Reviewed-by: Yuval Shaia <[email protected]>

Author: sowminiv

net/rds/tcp_listen.c

@@ -127,7 +127,7 @@ int rds_tcp_accept_one(struct socket *sock)
 	if (!sock) /* module unload or netns delete in progress */
 		return -ENETUNREACH;
 
-	ret = sock_create_kern(sock_net(sock->sk), sock->sk->sk_family,
+	ret = sock_create_lite(sock->sk->sk_family,
 			       sock->sk->sk_type, sock->sk->sk_protocol,
 			       &new_sock);
 	if (ret)