FreeBSD-stable-15-amd64-test - Build #1179 - Still Unstable

FreeBSD-stable-15-amd64-test - Build #1179 (07c15b75ff784fa7600a371629f6db90c0f97115) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1179/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1179/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1179/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)

57818a298ee1b7e907df7759346f9f4a11370d63 by markj:
tcp/rack: Fix a potential overflow in rack_update_pcm_ack()

820fb570ebf19ea25131edff2cbf349d1f8cc3c0 by markj:
sound: Check for errors from sndbuf_resize()

07eacba075ab15f6d42c8e8b766eda74bb027520 by markj:
sound: Revalidate after reacquiring locks when resizing buffers

719b159a1985a5eae9ab47c65d0108c589a5cf72 by markj:
bhyve: Fix handling of the xhci event ring

6f22ca12fa0e806e814e3538805848f404789c5e by markj:
bhyve: Improve HDA stream descriptor validation

07c15b75ff784fa7600a371629f6db90c0f97115 by markj:
bhyve: Fix handling of framebuffer resizing



The failed test cases:

2 tests failed.
FAILED:  bin.pkill.pkill-j_test.main

Error Message:
1 of 4 tests failed

FAILED:  lib.libexecinfo.sigtramp_test.test_backtrace_sigtramp

Error Message:
/usr/src/lib/libexecinfo/tests/sigtramp_test.c:30: n > 1 not met