mptcp: netlink: process IPv6 addrs in creating listening sockets

[ Upstream commit 029744cd4bc6e9eb3bd833b4a033348296d34645 ]

This change updates mptcp_pm_nl_create_listen_socket() to create
listening sockets bound to IPv6 addresses (where IPv6 is supported).

Fixes: 1729cf186d8a ("mptcp: create the listening socket for new port")
Acked-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Kishen Maloor <kishen.maloor@intel.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 2137b74..320f89b 100644 (file)
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -878,6 +878,7 @@ out:
 static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
                                            struct mptcp_pm_addr_entry *entry)
 {
+       int addrlen = sizeof(struct sockaddr_in);
        struct sockaddr_storage addr;
        struct mptcp_sock *msk;
        struct socket *ssock;
@@ -902,8 +903,11 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
        }
 
        mptcp_info2sockaddr(&entry->addr, &addr, entry->addr.family);
-       err = kernel_bind(ssock, (struct sockaddr *)&addr,
-                         sizeof(struct sockaddr_in));
+#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+       if (entry->addr.family == AF_INET6)
+               addrlen = sizeof(struct sockaddr_in6);
+#endif
+       err = kernel_bind(ssock, (struct sockaddr *)&addr, addrlen);
        if (err) {
                pr_warn("kernel_bind error, err=%d", err);
                goto out;