FreeBSD-main-amd64-test - Build #23699 - Still Unstable

FreeBSD-main-amd64-test - Build #23699 (cbbac560911521c0ded3e06e713107176855fae4) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23699/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23699/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23699/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)

2178e8c27aada86ce679d90b8d6cd61dc3bc7f6b by jilles:
sh: make smark a static variable instead of a local in main()

920184ed6e43b19f4b71253b55fd3ba66a7f0bb2 by dchagin:
linux(4): In preparation for xsave refactor fxsave code on amd64

cbbac560911521c0ded3e06e713107176855fae4 by dchagin:
linux(4): Preserve fpu xsave state across signal delivery on amd64



The failed test cases:

3 tests failed.
FAILED:  sys.netinet6.frag6.frag6_19.frag6_19

Error Message:
Global IPv6 statistics do not match: 19 != 20

FAILED:  sys.netlink.test_rtnl_ifaddr.py.TestRtNlAddIfaddrLo::test_add_6[gu_host]

Error Message:
/usr/tests/sys/netlink/test_rtnl_ifaddr.py:702: AssertionError

FAILED:  sys.netlink.test_rtnl_ifaddr.py.TestRtNlAddIfaddrLo::test_add_6[gu_prefix]

Error Message:
/usr/tests/sys/netlink/test_rtnl_ifaddr.py:702: AssertionError