https://gitlab.com/NTPsec/ntpsec/-/merge_requests/1262
https://bugs.gentoo.org/833274

From 75970342391b0b1fad422e6ca3dc89dd76dcf607 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 7 Apr 2022 03:02:22 +0100
Subject: [PATCH] ntpd/ntp_sandbox.c: allow rseq for glibc-2.35 in seccomp
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Fixes: https://gitlab.com/NTPsec/ntpsec/-/issues/728
Bug: https://bugs.gentoo.org/833274
Signed-off-by: Sam James <sam@gentoo.org>
--- a/ntpd/ntp_sandbox.c
+++ b/ntpd/ntp_sandbox.c
@@ -366,6 +366,9 @@ int scmp_sc[] = {
 	SCMP_SYS(rt_sigaction),
 	SCMP_SYS(rt_sigprocmask),
 	SCMP_SYS(rt_sigreturn),
+#ifdef __NR_rseq
+	SCMP_SYS(rseq),		/* needed by glibc-2.35+ for resumable sequences */
+#endif
 	SCMP_SYS(sigaction),
 	SCMP_SYS(sigprocmask),
 	SCMP_SYS(sigreturn),
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