FreeBSD-main-amd64-test - Build #27642 - Unstable

FreeBSD-main-amd64-test - Build #27642 (1e8c28712aafc9a3339e8a832767a70c08168bdc) - Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27642/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27642/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27642/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)

f9ae08a88924ba861ad0bb76f5a9a11fb44eced8 by glebius:
linux: on vnet detach call clean_unrhdr(9) always

77f453e9f9cafaf5e787c5bfd29966066d6b9dc3 by glebius:
tests/if_ovpn: add missing cleanup to the multihome6 test

51786cdeb07c26684c329624eb5af48562e615a0 by glebius:
sockets: remove unused pr_sosend_notsupp(), pr_soreceive_notsupp()

4fc11c92d324c9099ecc28f25a96591a2ff6105c by rmacklem:
nfsd: Fix handling of attributes during Open/Create/Exclusive_41

11d6ea47f06a38f66536b173e85ddf2674da6aff by kevans:
kern: mac: add a MAC label to struct prison

92b7366e438d8422a9e453aed02ca365da25bf62 by kevans:
mac: add macros for 5-argument SDT probes

8254b0dec02b376dae259cd2043513842d827bd8 by kevans:
kern: mac: add various jail MAC hooks

d7a517eb6d770e22db6a46a46677db27f565767c by kevans:
jaildesc: add an accessor for the struct prison in a jaildesc

31c2728185d1705634ff84c93936a4c91a651b22 by kevans:
mac_set_fd(3): add support for jail descriptors

626fe12e2801a06c59eaa056ecf11f573e30ecbb by kevans:
kern: mac: pull mac_label_copyin_string out

bd55cbb50c58876281f925cfd91961544f0153ad by kevans:
kern: add a mac.label jail parameter

1af8d5652a01f79d055436c2ee83219700e7b16c by kevans:
libjail: start refactoring struct ioctl support

db3b39f063d9f05ee808b9c5a11146ed6810d857 by kevans:
libjail: extend struct handlers to included MAC labels

1e8c28712aafc9a3339e8a832767a70c08168bdc by kevans:
jail: document the mac.label parameter



The failed test cases:

2 tests failed.
FAILED:  bin.pkill.pgrep-j_test.main

Error Message:
1 of 4 tests failed

FAILED:  bin.pkill.pkill-j_test.main

Error Message:
1 of 4 tests failed