FreeBSD-stable-15-amd64-test - Build #1191 - Still Unstable

FreeBSD-stable-15-amd64-test - Build #1191 (0fcd6a1c6bbe660ff75d87aebf7e7dcc40929ea3) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1191/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1191/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1191/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)

c712a039e44d5a70467c9cb3de184e277694b791 by christos:
snd_uaudio: drop the default monitor level to 10%

4798ab5050c264a5b3a8cd7285d84fb31e84f946 by christos:
sound: Standardize mixer_init() call order

2b61245f5a169db8c67c198f996f03710c1e11bc by christos:
sound: Simplify how snd_mixer is fetched and how the cdev is created

017cf4b7daf6d8bd2c8e70addb2684340161e0a5 by christos:
sound: Embed mixer cdev in snd_mixer

7ca2e1c92a5068778f0d4d132f9edfa7ad312f91 by christos:
sound: Defer macio codec volume writes to a task

3e19ea7e0500c7cd60227461c2bc3454f11cc119 by christos:
sound: Use snddev_info->lock in place of snd_mixer->lock

de7cd7fe9c910be9dd1ad6580a080cfe59dcd2cc by christos:
sound: Retire mixer_hwvol locked variants

03b8055094e8d56beb5750fb35b61410565d3701 by christos:
sound: Do not set a recording source in mixer_uninit()

332d81cd2f0c21522151e82d0aafa44a8ffdf797 by christos:
sound: Reuse mixer_delete() in mixer_uninit()

6d1ff70551bf910dd82fd021e468a8d0265386d6 by christos:
sound: Improve some mixer return values and their handling

4f4531be5e97530bbbc610d6b55a80f2831eaca3 by christos:
sound: Remove unncessary locking in sysctl_hw_snd_hwvol_mixer()

747ee16a11ade01a9d07d9dc6955c61dd0fcd258 by christos:
sound: Lock around mixer_set*() in mixer_init() for consistency

0fcd6a1c6bbe660ff75d87aebf7e7dcc40929ea3 by christos:
sound: Use uint8_t instead of legacy u_char



The failed test cases:

2 tests failed.
FAILED:  sys.netpfil.pf.pfsync.bulk

Error Message:
state not found on synced host

FAILED:  lib.libexecinfo.sigtramp_test.test_backtrace_sigtramp

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