FreeBSD-main-amd64-test - Build #27778 - Still Unstable

FreeBSD-main-amd64-test - Build #27778 (c88f012faa13c39f13efdcef88d3141253a300ab) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27778/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27778/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27778/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)

a03eabfebbce15d8ce028168969812d3ca2be206 by markj:
ip6_mroute: Mark functions as static

1539a657adb4363e7f12d6fd4c1c8ed2e2d842af by markj:
ip6_output tests: Remove an unused import

b9289743f40dae677f910be1d3e56198a3a3ff9b by christos:
src.opts: Remove MK_SOUND artifact

c88f012faa13c39f13efdcef88d3141253a300ab by christos:
lib/virtual_oss/sndio: Remove trailing backslash



The failed test cases:

3 tests failed.
FAILED:  sys.netgraph.ksocket.udp6_bind

Error Message:
/usr/src/tests/sys/netgraph/ksocket.c:167: connect(us, (struct sockaddr *)rep->data, sizeof(struct sockaddr_in6)) == 0 not met

FAILED:  sys.netgraph.ksocket.udp6_connect

Error Message:
/usr/src/tests/sys/netgraph/ksocket.c:134: NgSendMsg(cs, ".:" OURHOOK, NGM_KSOCKET_COOKIE, NGM_KSOCKET_CONNECT, &sin6, sizeof(sin6)) >= 0 not met

FAILED:  sys.netinet.socket_afinet.socket_afinet_bind_connected_port

Error Message:
/usr/src/tests/sys/netinet/socket_afinet.c:556: connect failed: Network is unreachable