diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude
index 022075e63cb..bca9dac4c1b 100644
--- a/tools/test/stress2/misc/all.exclude
+++ b/tools/test/stress2/misc/all.exclude
@@ -38,6 +38,7 @@ memguard.sh		https://people.freebsd.org/~pho/stress/log/log0088.txt		20210402
 memguard2.sh		Waiting for fix commit
 memguard3.sh		Waiting for fix commit
 mlockall2.sh		Unrecoverable OOM killing seen					20190203
+mlockall6.sh		https://people.freebsd.org/~pho/stress/log/log0430.txt		20230403
 mlockall7.sh		Needs further investigation					20210123
 msetdomain.sh		May change policy for random threads to domainset_fixed		20210104
 newfs4.sh		watchdog fired. newbuf						20190225
diff --git a/tools/test/stress2/misc/mlockall6.sh b/tools/test/stress2/misc/mlockall6.sh
index 33b20ce3137..3041c56573e 100755
--- a/tools/test/stress2/misc/mlockall6.sh
+++ b/tools/test/stress2/misc/mlockall6.sh
@@ -30,6 +30,9 @@
 # "panic: Lock (rw) vm object not locked @ vm/vm_page.c:1013" seen:
 # https://people.freebsd.org/~pho/stress/log/mlockall6-2.txt
 
+# "panic: vm_page_unwire: wire count underflow for page..." seen:
+# https://people.freebsd.org/~pho/stress/log/log0430.txt
+
 . ../default.cfg
 
 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1