net/ulp: Remove redundant ->clone() test in inet_clone_ulp().

mainline inclusion
from mainline-v6.3-rc1
commit be9832c2
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6H3MB
CVE: CVE-2023-0461

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be9832c2e9cc4c15906a77baddcd906fb4bb864b

---------------------------

Commit 2c02d41d ("net/ulp: prevent ULP without clone op from entering
the LISTEN status") guarantees that all ULP listeners have clone() op, so
we no longer need to test it in inet_clone_ulp().
Signed-off-by: NKuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230217200920.85306-1-kuniyu@amazon.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NLiu Jian <liujian56@huawei.com>
Reviewed-by: NYue Haibing <yuehaibing@huawei.com>
Reviewed-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

net/ipv4/inet_connection_sock.c

@@ -814,8 +814,7 @@ static void inet_clone_ulp(const struct request_sock *req, struct sock *newsk,
 	if (!icsk->icsk_ulp_ops)
 		return;
 
-	if (icsk->icsk_ulp_ops->clone)
-		icsk->icsk_ulp_ops->clone(req, newsk, priority);
+	icsk->icsk_ulp_ops->clone(req, newsk, priority);
 }
 
 /**