https://bugs.gentoo.org/823692
https://gitlab.com/NTPsec/ntpsec/-/merge_requests/1247
https://gitlab.com/NTPsec/ntpsec/-/issues/713

From 170d60b7e269154fb108bb4b010ee5ee0110bf2d Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sun, 14 Nov 2021 08:44:28 +0000
Subject: [PATCH] ntpd/ntp_sandbox.c: allow clone3 in seccomp filter for
 glibc-2.34

Signed-off-by: Sam James <sam@gentoo.org>
--- a/ntpd/ntp_sandbox.c
+++ b/ntpd/ntp_sandbox.c
@@ -403,6 +403,7 @@ int scmp_sc[] = {
  * rather than generate a trap.
  */
 	SCMP_SYS(clone),	/* threads */
+	SCMP_SYS(clone3),
 	SCMP_SYS(kill),		/* generate signal */
 	SCMP_SYS(madvise),
 	SCMP_SYS(mprotect),
