FreeBSD-main-amd64-test - Build #20528 - Still Unstable

FreeBSD-main-amd64-test - Build #20528 (8d8589b385c901581ee71d09d86d044a6f42dfef) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20528/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20528/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/20528/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)

531f8cfea06b689b6c17219faa3e67977958b0c0 by kib:
Use dedicated lock name for pbufs

5875b94c74935affb47c7e059011f80ee2f6bf67 by kib:
buf_alloc(): lock the buffer with LK_NOWAIT

3d68c4e17578684cfdfd002fb6ab8554df525963 by kib:
syncer VOP_FSYNC(): unlock syncer vnode around call to VFS_SYNC()

0cdc6033087ac28640fa750a4dc4676107d4f364 by kib:
ufs: Use IS_SNAPSHOT()

4559700a0a99376640a8913d08bdf0cfb0124d4a by kib:
ffs_snapblkfree(): add a comment explaining lockmgr invocation

8d8589b385c901581ee71d09d86d044a6f42dfef by kib:
ufs: be more persistent with finishing some operations



The failed test cases:

2 tests failed.
FAILED:  libexec.tftpd.functional.rrq_empty_v4

Error Message:
Test case body timed out

FAILED:  sys.netpfil.pf.killstate.id

Error Message:
atf-check failed; see the output of the test for details