FreeBSD-main-amd64-test - Build #20208 - Still Unstable

FreeBSD-main-amd64-test - Build #20208 (c7f93ee5cc29fdf3ccecb11921f419919616d1d9) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20208/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20208/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20208/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)

0af4ce45472c3ddad8d1835815f5d09943fc7274 by glebius:
tcp_usr_shutdown: don't cast inp_ppcb to tcpcb before checking inp_flags

3f1570847831e6dbcafc1f416f96404bf66048f2 by kib:
itimers_alloc: no need to initialize its_timers array

23ba59fbfb6ad580c4f185ffea2fa8a32b4d131d by kib:
itimers: strip unused bits from struct itimer and struct itimers

e161dfa918974b4392c7c5127bd51f28ea5f8b6a by alc:
Fix pmap_is_prefaultable() on arm64 and riscv

f4bf48c25c3a8de3fbfd49b45b2d59026df13a6a by mav:
GEOM: Minor polishing in geom_event.

86f0c3ec13aa6d583a586f343329d15faf22bd75 by adrian:
ipq4018_usb_phy: add USB 2.0 and 3.0 PHY support

777963afb5a0dba75cdd7117d3070d9486b2ee96 by adrian:
qcom_dwc3: add initial Qualcomm SoC DWC3 controller glue

c7f93ee5cc29fdf3ccecb11921f419919616d1d9 by adrian:
ipq4018_usb_phy: remove old debugging routine



The failed test cases:

3 tests failed.
FAILED:  lib.libnv.nvlist_send_recv_test.nvlist_send_recv__send_many_fds__dgram

Error Message:
/usr/src/lib/libnv/tests/nvlist_send_recv_test.c:457: nvl != NULL not met

FAILED:  libexec.tftpd.functional.wrq_duped_data_v6

Error Message:
Test case body timed out

FAILED:  sys.posixshm.posixshm_test.largepage_mprotect

Error Message:
/usr/src/tests/sys/posixshm/posixshm_test.c:1669: mmap(2097152 bytes) failed; error=28