FreeBSD-stable-15-amd64-test - Build #428 - Still unstable

FreeBSD-stable-15-amd64-test - Build #428 (4f004c7924afd04bf693584eab36d8f195da4083) - Still unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/428/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/428/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/428/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)

7c59e09a0df45581b28d5e99ea41c33aeede7f80 by kib:
x86/local_apic.c: convert lvts[] and elvts[] arrays to designated

dfd4c8759325ffad17e8e2806fa176b4f4376324 by kib:
x88/local_apic.c: for each lvt element, add LVT register index

2079e5864f204c552b82b63809e1b39b13ccfd3c by kib:
x86: mask all LAPIC vectors early, before BSP interrupts are enabled

9286d8fe28732034f039fc26381ddb964d8a393f by kib:
x86/local_apic.c: add lapic_maxlvt() helper

7d327e4ce6e0e62ad7be87527d565bdb93ef92dc by kib:
x86/local_apic.c: Properly calculate the number of LVT entries

854e0e4803789c669edeff7c31e1ed4fd66e64b7 by kib:
x86 lapic: Dump LVTs from the ddb show lapic command

21dd894a5e0ff42f2a7f34ad2fe4e4fc06a00126 by kib:
sys: do not allow entering vm_fault() on boot until VM is initialized

c4522efca63f6b72a7d7083998f8482feaab83a6 by kib:
libthr/thread/thr_join.c: deduplicate backout_join() helper

a8891c29d6a0a9a8ed32148332b890941e86a766 by kib:
libthr: add pthread_tryjoin_np()

d1ac644ccc43148525371d099ebbcb0fe4a471d0 by kib:
Document pthread_tryjoin_np(3)

4f004c7924afd04bf693584eab36d8f195da4083 by kib:
lib/libthr: add pthread_tryjoin(3) test



The failed test cases:

2 tests failed.
FAILED:  sys.netpfil.pf.mbuf.inet6_in_mbuf_len

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

FAILED:  sys.netlink.test_netlink_message_writer.py.__test_cases_list__

Error Message:
Test program did not exit cleanly