FreeBSD-stable-14-amd64-test - Build #661 - Still Unstable

FreeBSD-stable-14-amd64-test - Build #661 (1d0920986f0b0cdb2de0456620a795e2a39780ce) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/661/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/661/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/661/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)

94f92b6e3070c82672fd13601c208eeaa6d515b0 by cperciva:
EC2: Bump AMI size to 8 GB

90a5cd466b84b72af539a560d8e3bf7b7e408e30 by des:
adduser: Better document ZFS dataset creation.

dd62980f662cd632bf59c6062f48b5021b307afe by des:
pw userdel: destroy home dataset if empty

8d801641a39834cf8ce72dc88cf8bc5712cc1cad by kib:
exit(3): make it thread-safe

2a1e8d7c30c90e17fccaeec89e4963a8d825063d by kib:
exit(3): clarify how to obtain full exit status of the exited process

cf4a34bbc7dfee43e9983a847ecf0fa0ed1d258d by kib:
tail -F: fix crash

1d0920986f0b0cdb2de0456620a795e2a39780ce by cperciva:
Makefile.ec2: Add missing CLEANFILES entry



The failed test cases:

4 tests failed.
FAILED:  sbin.ping.ping_test.inject_opts

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

FAILED:  sys.netpfil.pf.fragmentation_pass.no_df

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

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