FreeBSD-main-amd64-test - Build #24998 - Still Unstable

FreeBSD-main-amd64-test - Build #24998 (73fdbfb911215795c55c89870ebc5d9197bf2a23) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24998/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24998/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24998/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)

39450eba8e6cd5b83def724481127b58ecc1fcc1 by zlei:
kern linker: Do not touch userrefs of the kernel file

73fdbfb911215795c55c89870ebc5d9197bf2a23 by thj:
netmap: Address errors on memory free in netmap_generic



The failed test cases:

2 tests failed.
FAILED:  sys.fs.tmpfs.times_test.empty

Error Message:
Test case was expecting a failure but none were raised

FAILED:  cddl.usr.sbin.zfsd.zfsd_unittest.main

Error Message:
Received signal 6