FreeBSD-stable-14-amd64-test - Build #696 - Still Unstable

FreeBSD-stable-14-amd64-test - Build #696 (048132192698865914e07c899898861b2b24d676) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/696/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/696/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/696/console

Status explanation:
"Unstable" - some tests are suspected being broken by the following changes
"Still Unstable" - the failing test cases have not been fixed by these
                   following changes and this is a notification to note that
                   these changes have not been fully tested by the CI system

Change summaries:
(Those commits are likely but not certainly responsible)

e8b9bd97e3cb1f58d4a4514c48d2fb4d49380511 by kib:
vop_stdadvise(): restore correct handling of length == 0

4fe752ccb3f8faeecf747932d13b15fc774cc244 by cperciva:
zfs: fix build without MAC

8f251937850142748cdf67a46630342934ff9f91 by kp:
if_ovpn: ensure it's safe to modify the mbuf

048132192698865914e07c899898861b2b24d676 by eugen:
MFC: fetch(1): suppress "Not Modified" in quiet mode



The failed test cases:

6 tests failed.
FAILED:  sys.netinet6.frag6.frag6_13.frag6_13

Error Message:
atf-check failed; see the output of the test for details

FAILED:  sys.netpfil.pf.fragmentation_no_reassembly.match_full_v4

Error Message:
atf-check failed; see the output of the test for details

FAILED:  sys.netpfil.pf.scrub_pass.max_mss_v6

Error Message:
atf-check failed; see the output of the test for details

FAILED:  sys.netmap.ctrl-api-test.main

Error Message:
Returned non-success exit status 255

FAILED:  sys.geom.class.eli.attach_test.attach_multiple_fails

Error Message:
Premature exit; test case exited with code 1

FAILED:  sys.netlink.test_netlink_message_writer.py.__test_cases_list__

Error Message:
Test program did not exit cleanly