Index: contrib/ntp/ntpd/ntpd.c
===================================================================
--- contrib/ntp/ntpd/ntpd.c
+++ contrib/ntp/ntpd/ntpd.c
@@ -138,6 +138,10 @@
 # include <seccomp.h>
 #endif /* LIBSECCOMP and KERN_SECCOMP */
 
+#ifdef __FreeBSD__
+#include <sys/procctl.h>
+#endif
+
 #ifdef HAVE_DNSREGISTRATION
 # include <dns_sd.h>
 DNSServiceRef mdns;
@@ -402,6 +406,23 @@
 	char *argv[]
 	)
 {
+#ifdef __FreeBSD__
+	{
+		/*
+		 * We Must disable ASLR stack gap on FreeBSD to avoid a
+		 * segfault. See PR/241421 and PR/241960.
+		 */
+		int	aslr_var;
+
+		pid_t	my_pid = getpid();
+
+		aslr_var = PROC_STACKGAP_DISABLE;
+		if (procctl(P_PID, my_pid, PROC_STACKGAP_CTL, &aslr_var) != 0) {
+			msyslog(LOG_ERR,"procctl set aslr mode failed");
+			exit(255);
+		}
+	}
+#endif
 	return ntpdmain(argc, argv);
 }
 #endif /* !SYS_WINNT */