The latest vendor import of ntp-4.2.8p18 includes a bug that can cause a
segfault in an error message related to failing to bring up an endpoint
during interface setup. This occurs due to unhandled cases in the
error-handling path that reference uninitialized or freed fields in endpt,
leading to a crash under certain conditions.

PR: 281202
Obtained from: https://bugs.ntp.org/show_bug.cgi?id=3928
Sponsored by: Rubicon Communications, LLC ("Netgate")