FreeBSD-stable-15-amd64-test - Build #939 - Unstable

FreeBSD-stable-15-amd64-test - Build #939 (f8e499fb0fc80f1e74a6a5b474beff9250c2fe43) - Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/939/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/939/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/939/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)

a00f80731213e03bf3d0b9028a93d0be4c0df756 by emaste:
vtfontcvt: Return error from write_fnt_source

242c9c86c8cad6aa29bc1af9161d4f0eec45f29b by markj:
inotify: Unconditionally generate IN_IGNORED events for files/dirs

1ad156fc14391fbca3c60012c4aaae6d3ad43c73 by markj:
inotify: Ensure that "allocfail" is initialized in inotify_log_one()

32d229d22fcbf8b9d143b8c81150f8867b82ddb2 by emaste:
if_tsec: Free entire mbuf chain on failure

de8a68da8ceea284c9b6f07690d285b0931f98a3 by emaste:
ipsec: Free entire mbuf chain on failure

554cf9dcb680f9451efeb3fdb653fb9516a34381 by emaste:
linuxkpi 802.11: Free entire mbuf chain on failure

f8e499fb0fc80f1e74a6a5b474beff9250c2fe43 by emaste:
ipfw nat: Add assertion that mbuf is not a chain



The failed test cases:

1 tests failed.
FAILED:  sys.netpfil.pf.return.py.TestReturn::test_udp

Error Message:
/usr/tests/sys/netpfil/pf/return.py:38: Exception