FreeBSD-stable-14-amd64-test - Build #768 - Still Unstable

FreeBSD-stable-14-amd64-test - Build #768 (6bfac3b2a335c4fb133f670e7b484ea13072882c) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/768/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/768/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-14-amd64-test/768/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)

ace5484e48c9c8585cf914963912ee1ebf35327a by christos:
sound: Call DSP_REGISTERED before PCM_DETACHING

32a2994b4487d9de5190982fd88cbc6d57414cdb by christos:
sound: Use DSP_REGISTERED in dsp_clone()

26524f063fca6d6ab981e08911078f6e59f00f14 by christos:
sound: Change PCMDIR_* numbering

f3449b1a2115ed0f680568b8e0d647b8595f5a92 by christos:
sound: Untangle dsp_cdevs[] and dsp_unit2name() confusion

bf3a355a874abfcf7ab77bff84bc355ef79ef0a6 by christos:
sound: Remove redundant refcount checks in vchan_setnew()

6bfac3b2a335c4fb133f670e7b484ea13072882c by christos:
sound: Retire channel refcount



The failed test cases:

2 tests failed.
FAILED:  sys.netmap.ctrl-api-test.main

Error Message:
Returned non-success exit status 255

FAILED:  sys.netlink.test_netlink_message_writer.py.__test_cases_list__

Error Message:
Test program did not exit cleanly