diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c
index 8feca02ddbf2..0f5c18520eff 100644
--- a/fs/smb/server/oplock.c
+++ b/fs/smb/server/oplock.c
@@ -481,8 +481,12 @@ static inline int compare_guid_key(struct oplock_info *opinfo,
 				   const char *guid1, const char *key1)
 {
 	const char *guid2, *key2;
+	struct ksmbd_conn *conn;
 
-	guid2 = opinfo->conn->ClientGUID;
+	conn = READ_ONCE(opinfo->conn);
+	if (!conn)
+		return 0;
+	guid2 = conn->ClientGUID;
 	key2 = opinfo->o_lease->lease_key;
 	if (!memcmp(guid1, guid2, SMB2_CLIENT_GUID_SIZE) &&
 	    !memcmp(key1, key2, SMB2_LEASE_KEY_SIZE))