releases/6.6.34/mptcp-avoid-some-duplicate-code-in-socket-option-handling.patch

From stable+bounces-47623-greg=kroah.com@vger.kernel.org Wed May 29 11:58:36 2024
From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>
Date: Wed, 29 May 2024 11:58:19 +0200
Subject: mptcp: avoid some duplicate code in socket option handling
To: mptcp@lists.linux.dev, stable@vger.kernel.org, gregkh@linuxfoundation.org, sashal@kernel.org
Cc: Paolo Abeni <pabeni@redhat.com>, Mat Martineau <martineau@kernel.org>, Matthieu Baerts <matttbe@kernel.org>, "David S . Miller" <davem@davemloft.net>
Message-ID: <20240529095817.3370953-6-matttbe@kernel.org>

From: Paolo Abeni <pabeni@redhat.com>

commit a74762675f700a5473ebe54a671a0788a5b23cc9 upstream.

The mptcp_get_int_option() helper is needless open-coded in a
couple of places, replace the duplicate code with the helper
call.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: bd11dc4fb969 ("mptcp: fix full TCP keep-alive support")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mptcp/sockopt.c |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -626,13 +626,11 @@ static int mptcp_setsockopt_sol_tcp_cork
 {
 	struct mptcp_subflow_context *subflow;
 	struct sock *sk = (struct sock *)msk;
-	int val;
+	int val, ret;
 
-	if (optlen < sizeof(int))
-		return -EINVAL;
-
-	if (copy_from_sockptr(&val, optval, sizeof(val)))
-		return -EFAULT;
+	ret = mptcp_get_int_option(msk, optval, optlen, &val);
+	if (ret)
+		return ret;
 
 	lock_sock(sk);
 	sockopt_seq_inc(msk);
@@ -656,13 +654,11 @@ static int mptcp_setsockopt_sol_tcp_node
 {
 	struct mptcp_subflow_context *subflow;
 	struct sock *sk = (struct sock *)msk;
-	int val;
-
-	if (optlen < sizeof(int))
-		return -EINVAL;
+	int val, ret;
 
-	if (copy_from_sockptr(&val, optval, sizeof(val)))
-		return -EFAULT;
+	ret = mptcp_get_int_option(msk, optval, optlen, &val);
+	if (ret)
+		return ret;
 
 	lock_sock(sk);
 	sockopt_seq_inc(msk);