FreeBSD-main-amd64-test - Build #19937 - Still Unstable

FreeBSD-main-amd64-test - Build #19937 (0e765d9b08dcc2386b799815f2c835c97a93614c) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19937/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19937/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19937/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)

33f9ea209e954cfa3a89d05b400198bf14dd7ad6 by brooks:
syscalls: add missing SAL annotations

3660e76a2220d5218b4c28c2d2f2c90142f1ec4e by brooks:
syscalls: correct a couple style issues

28f047188492c8f2ddca66f162fd2ac9bdc170a6 by brooks:
uipc: rework recvfrom, getsockname, getpeername

ba4e5253a38e13ff14ac25fbef98b24be179d529 by brooks:
syscalls: normalize orecvfrom and ogetsockname

c2996f8ad930f2245b9ef725e72ec7ed7c04161a by brooks:
syscalls: regen

638c5fa8df1d3f2bf4c63c2923f592b0c9e63751 by brooks:
syscalls: normalize (get|set)rlimit

7fb006e7d61e9883344dfb20b277c3c015ab67b1 by brooks:
syscalls: regen

cffb55f0f37c5bddd1d203bfbe281bea8ab62cda by brooks:
syscalls: normalize exit

5c1835b1d4b554235a6904f3a984680baf38edf2 by brooks:
syscalls: regen

d7f306c5be6fb4b4ab4455e1d033cc9545ce015d by brooks:
makesyscalls: add a new SYSMUX type

a8efd4d1b3b43a5762f87befe22dd6e1cda73373 by brooks:
syscalls: make syscall and __syscall SYSMUX

401eec3635856b8f5b6b7961ebf372d1dd1fb60f by brooks:
syscalls: regen

6d37a1670b090a3224cbba8488b445c3990bf298 by brooks:
syscalls: mprotect does not take a const

0e765d9b08dcc2386b799815f2c835c97a93614c by brooks:
syscalls: regen



The failed test cases:

3 tests failed.
FAILED:  lib.libregex.exhaust_test.regcomp_too_big

Error Message:
Empty test result or no new line

FAILED:  sys.posixshm.posixshm_test.largepage_mprotect

Error Message:
/usr/src/tests/sys/posixshm/posixshm_test.c:1669: mmap(2097152 bytes) failed; error=28

FAILED:  sys.netpfil.pf.killstate.v6

Error Message:
atf-check failed; see the output of the test for details