FreeBSD-main-amd64-test - Build #24578 - Still Unstable

FreeBSD-main-amd64-test - Build #24578 (c0047e7c356953d138194ff71cc510ffe85425f0) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24578/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24578/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24578/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)

6afa2333d2e42e1df67a0fab20f0ede76dff516d by kib:
iommu: remove leftover sys/cdefs.h includes

7153d5e4bc67732f8258d50ffffa42a09a19b427 by kib:
dmar(9): style, fix indent

a869643e184a73382ef7939b465fd42785e096d1 by kib:
iommu_gas_match_one(): check for underflow

30ce85ca11433ba05cdbab8aedceaa15a93bd97a by kib:
iommu_gas: add ddb 'show iommu_domain' command

24e38af60a637073b5164837959098acaa3d8daa by kib:
DMAR: add knob to disable RMRR entries installation into domains

733da1eb947688210bc152656357ecafbd172bb7 by kib:
iommu_gas: print entries flags and domains if an overlap detected

cb1d664b0073232173072231cb386f0216ee596b by kib:
iommu_gas: zero fake on-stack map entry used in

a59c252903e81f46c74903ce5b1cf0960927dbcc by kib:
IOMMU: add GAS map entry flag IOMMU_MAP_ENTRY_FAKE

273b4de3462d7825ebe4ace7a1930f098311287f by kib:
iommu: add iommu_gas_remove_locked()

f59128775636846574e092c68e849a56f74577e6 by kib:
iommu_gas: make placeholder entry at the start of the GAS zero size

c0047e7c356953d138194ff71cc510ffe85425f0 by kib:
iommu_gas_remove(): consolidate places where decision is made to keep



The failed test cases:

2 tests failed.
FAILED:  sys.netinet6.test_ip6_output.py.TestIP6OutputScope::test_output6_linklocal_scope[ll_differentif2]

Error Message:
/usr/tests/atf_python/sys/net/tools.py:93: IndexError

FAILED:  sys.netmap.ctrl-api-test.main

Error Message:
Returned non-success exit status 255