FreeBSD-main-amd64-test - Build #24668 - Still Unstable

FreeBSD-main-amd64-test - Build #24668 (353e4c5a068d06b0d6dcfa9eb736ecb16e9eae45) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24668/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24668/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24668/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)

353e4c5a068d06b0d6dcfa9eb736ecb16e9eae45 by marius:
uart(4): Honor hardware state of NS8250-class for tsw_busy



The failed test cases:

3 tests failed.
FAILED:  sys.net.routing.test_rtsock_l3.rtm_add_v6_temporal1_success

Error Message:
/usr/src/tests/sys/net/routing/rtsock_common.h:684: rtsock read timed out (5 seconds passed)

FAILED:  sys.kern.shutdown_dgram.unblock

Error Message:
Test case body timed out

FAILED:  sys.kern.unix_passfd_dgram.send_and_shutdown

Error Message:
/usr/src/tests/sys/kern/unix_passfd_test.c:431: openfiles() == nfiles - 1 not met