1 files changed, 62 insertions, 0 deletions
diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index 4c528154ea92..0c256e7c8675 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -2026,4 +2026,66 @@ TEST_F(audit, connect)
 	EXPECT_EQ(0, close(sock_fd));
 }
 
+static int matches_log_tcp_bound(int audit_fd, const char *const addr,
+				 __u16 lport, __u16 dport)
+{
+	static const char log_template[] = REGEX_LANDLOCK_PREFIX
+		" blockers=net\\.connect_tcp laddr=%s lport=%u daddr=%s dest=%u$";
+	/* Slack for two addresses and two port numbers. */
+	char log_match[sizeof(log_template) + 40];
+	int log_match_len;
+
+	log_match_len = snprintf(log_match, sizeof(log_match), log_template,
+				 addr, lport, addr, dport);
+	if (log_match_len > sizeof(log_match))
+		return -E2BIG;
+
+	return audit_match_record(audit_fd, AUDIT_LANDLOCK_ACCESS, log_match,
+				  NULL);
+}
+
+/*
+ * After a bind() to an allowed port, a denied connect must report laddr/lport
+ * from the bound socket (made available through audit_net.sk) in addition to
+ * the connect sockaddr's daddr/dest.
+ */
+TEST_F(audit, connect_tcp_bound)
+{
+	const struct landlock_ruleset_attr ruleset_attr = {
+		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP |
+				      LANDLOCK_ACCESS_NET_CONNECT_TCP,
+	};
+	const struct landlock_net_port_attr rule_bind = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
+		.port = self->srv0.port,
+	};
+	struct service_fixture srv_remote;
+	struct audit_records records;
+	int ruleset_fd, sock_fd;
+
+	/* Uses a second port as the denied connect target. */
+	ASSERT_EQ(0, set_service(&srv_remote, variant->prot, 1));
+
+	ruleset_fd =
+		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
+	ASSERT_LE(0, ruleset_fd);
+	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT,
+				       &rule_bind, 0));
+	enforce_ruleset(_metadata, ruleset_fd);
+	EXPECT_EQ(0, close(ruleset_fd));
+
+	sock_fd = socket_variant(&self->srv0);
+	ASSERT_LE(0, sock_fd);
+	EXPECT_EQ(0, bind_variant(sock_fd, &self->srv0));
+	EXPECT_EQ(-EACCES, connect_variant(sock_fd, &srv_remote));
+	EXPECT_EQ(0, matches_log_tcp_bound(self->audit_fd, variant->addr,
+					   self->srv0.port, srv_remote.port));
+
+	EXPECT_EQ(0, audit_count_records(self->audit_fd, &records));
+	EXPECT_EQ(0, records.access);
+	EXPECT_EQ(1, records.domain);
+
+	EXPECT_EQ(0, close(sock_fd));
+}
+
 TEST_HARNESS_MAIN