Commit 7ab4a7c5d969 for kernel

commit 7ab4a7c5d969642782b8a5b608da0dd02aa9f229
Author: Li Xiasong <lixiasong1@huawei.com>
Date:   Thu Mar 19 19:21:59 2026 +0800

    MPTCP: fix lock class name family in pm_nl_create_listen_socket

    In mptcp_pm_nl_create_listen_socket(), use entry->addr.family
    instead of sk->sk_family for lock class setup. The 'sk' parameter
    is a netlink socket, not the MPTCP subflow socket being created.

    Fixes: cee4034a3db1 ("mptcp: fix lockdep false positive in mptcp_pm_nl_create_listen_socket()")
    Signed-off-by: Li Xiasong <lixiasong1@huawei.com>
    Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
    Link: https://patch.msgid.link/20260319112159.3118874-1-lixiasong1@huawei.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/mptcp/pm_kernel.c b/net/mptcp/pm_kernel.c
index b2b9df43960e..82e59f9c6dd9 100644
--- a/net/mptcp/pm_kernel.c
+++ b/net/mptcp/pm_kernel.c
@@ -838,7 +838,7 @@ static struct lock_class_key mptcp_keys[2];
 static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
 					    struct mptcp_pm_addr_entry *entry)
 {
-	bool is_ipv6 = sk->sk_family == AF_INET6;
+	bool is_ipv6 = entry->addr.family == AF_INET6;
 	int addrlen = sizeof(struct sockaddr_in);
 	struct sockaddr_storage addr;
 	struct sock *newsk, *ssk;