diff --git a/include/net/ip.h b/include/net/ip.h
index 6fbc0dcf4b97..1fc4c8d69e33 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -810,5 +810,6 @@ int ip_sock_set_mtu_discover(struct sock *sk, int val);
 void ip_sock_set_pktinfo(struct sock *sk);
 void ip_sock_set_recverr(struct sock *sk);
 void ip_sock_set_tos(struct sock *sk, int val);
+void  __ip_sock_set_tos(struct sock *sk, int val);
 
 #endif	/* _IP_H */
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 0b74ac49d6a6..9c68b6b74d9f 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -585,9 +585,9 @@ out:
 	return err;
 }
 
-void ip_sock_set_tos(struct sock *sk, int val)
+void __ip_sock_set_tos(struct sock *sk, int val)
 {
-	u8 old_tos = READ_ONCE(inet_sk(sk)->tos);
+	u8 old_tos = inet_sk(sk)->tos;
 
 	if (sk->sk_type == SOCK_STREAM) {
 		val &= ~INET_ECN_MASK;
@@ -599,6 +599,13 @@ void ip_sock_set_tos(struct sock *sk, int val)
 		sk_dst_reset(sk);
 	}
 }
+
+void ip_sock_set_tos(struct sock *sk, int val)
+{
+	lock_sock(sk);
+	__ip_sock_set_tos(sk, val);
+	release_sock(sk);
+}
 EXPORT_SYMBOL(ip_sock_set_tos);
 
 void ip_sock_set_freebind(struct sock *sk)
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index 18ce624bfde2..59bd5e114392 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -738,7 +738,7 @@ static int mptcp_setsockopt_v4_set_tos(struct mptcp_sock *msk, int optname,
 	mptcp_for_each_subflow(msk, subflow) {
 		struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
 
-		ip_sock_set_tos(ssk, val);
+		__ip_sock_set_tos(ssk, val);
 	}
 	release_sock(sk);
 
@@ -1411,7 +1411,7 @@ static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk)
 	ssk->sk_bound_dev_if = sk->sk_bound_dev_if;
 	ssk->sk_incoming_cpu = sk->sk_incoming_cpu;
 	ssk->sk_ipv6only = sk->sk_ipv6only;
-	ip_sock_set_tos(ssk, inet_sk(sk)->tos);
+	__ip_sock_set_tos(ssk, inet_sk(sk)->tos);
 
 	if (sk->sk_userlocks & tx_rx_locks) {
 		ssk->sk_userlocks |= sk->sk_userlocks & tx_rx_locks;
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index 61a2a1988ce6..b1fc8afd072d 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -716,7 +716,7 @@ run_test_transparent()
 	# the required infrastructure in MPTCP sockopt code. To support TOS, the
 	# following function has been exported (T). Not great but better than
 	# checking for a specific kernel version.
-	if ! mptcp_lib_kallsyms_has "T ip_sock_set_tos$"; then
+	if ! mptcp_lib_kallsyms_has "T __ip_sock_set_tos$"; then
 		echo "INFO: ${msg} not supported by the kernel: SKIP"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return