smb: use kernel_connect() and kernel_bind()

Recent changes to kernel_connect() and kernel_bind() ensure that
callers are insulated from changes to the address parameter made by BPF
SOCK_ADDR hooks. This patch wraps direct calls to ops->connect() and
ops->bind() with kernel_connect() and kernel_bind() to ensure that SMB
mounts do not see their mount address overwritten in such cases.

Link: https://lore.kernel.org/netdev/9944248dba1bce861375fcce9de663934d933ba9.camel@redhat.com/
Cc: <stable@vger.kernel.org> # 6.0+
Signed-off-by: Jordan Rife <jrife@google.com>
Acked-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: jrife

fs/smb/client/connect.c

@@ -2895,9 +2895,9 @@ bind_socket(struct TCP_Server_Info *server)
 	if (server->srcaddr.ss_family != AF_UNSPEC) {
 		/* Bind to the specified local IP address */
 		struct socket *socket = server->ssocket;
-		rc = socket->ops->bind(socket,
-				       (struct sockaddr *) &server->srcaddr,
-				       sizeof(server->srcaddr));
+		rc = kernel_bind(socket,
+				 (struct sockaddr *) &server->srcaddr,
+				 sizeof(server->srcaddr));
 		if (rc < 0) {
 			struct sockaddr_in *saddr4;
 			struct sockaddr_in6 *saddr6;
@@ -3046,8 +3046,8 @@ generic_ip_connect(struct TCP_Server_Info *server)
 		 socket->sk->sk_sndbuf,
 		 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
 
-	rc = socket->ops->connect(socket, saddr, slen,
-				  server->noblockcnt ? O_NONBLOCK : 0);
+	rc = kernel_connect(socket, saddr, slen,
+			    server->noblockcnt ? O_NONBLOCK : 0);
 	/*
 	 * When mounting SMB root file systems, we do not want to block in
 	 * connect. Otherwise bail out and then let cifs_reconnect() perform