cifs: support reconnect with alternate password for SMB1

JIRA: https://issues.redhat.com/browse/RHEL-76046

commit b8ed9da
Author: Meetakshi Setiya <msetiya@microsoft.com>
Date:   Fri Jan 10 07:10:27 2025 -0500

    cifs: support reconnect with alternate password for SMB1
    
    SMB1 shares the mount and remount code paths with SMB2/3 and already
    supports password rotation in some scenarios. This patch extends the
    password rotation support to SMB1 reconnects as well.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: Meetakshi Setiya <msetiya@microsoft.com>
    Signed-off-by: Steve French <stfrench@microsoft.com>

Signed-off-by: Paulo Alcantara <paalcant@redhat.com>

Author: pcacjr

fs/smb/client/cifssmb.c

@@ -148,8 +148,17 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
 	spin_unlock(&ses->ses_lock);
 
 	rc = cifs_negotiate_protocol(0, ses, server);
-	if (!rc)
+	if (!rc) {
 		rc = cifs_setup_session(0, ses, server, ses->local_nls);
+		if ((rc == -EACCES) || (rc == -EHOSTDOWN) || (rc == -EKEYREVOKED)) {
+			/*
+			 * Try alternate password for next reconnect if an alternate
+			 * password is available.
+			 */
+			if (ses->password2)
+				swap(ses->password2, ses->password);
+		}
+	}
 
 	/* do we need to reconnect tcon? */
 	if (rc || !tcon->need_reconnect) {