Re: [PATCH v3 net-next 8/9] af_unix: Introduce SO_PASSRIGHTS.

From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Date: Thu, 15 May 2025 15:25:57 -0400

quoted

@@ -1879,6 +1886,13 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
 		v.val = sk->sk_scm_pidfd;
 		break;
 
+	case SO_PASSRIGHTS:
+		if (!sk_is_unix(sk))
+			return -EOPNOTSUPP;
+
+		v.val = sk->sk_scm_rights;

Same question about lockless reading of the field.

Same applied here and in other places, but all readers in sendmsg()
is under lock_sock().