tests: soak gate via uploaded helper (quoting), 04/05 assertions fixed (pf interface name vs OS device)

tests/vm/soak-helper.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Helper executed ON pf0 by 14-soak.sh (uploaded with pfput to avoid quoting
+# hell through two ssh hops).
+#   $1 = "slab" | "dmesg" | "states"
+case "${1:-}" in
+slab)
+	grep -E '^(pf|pfk)' /proc/slabinfo | tr -s ' ' | cut -d' ' -f1,3 | sort
+	;;
+dmesg)
+	dmesg | grep -E 'BUG:|WARNING:|Oops|general protection|kernel BUG' || true
+	;;
+states)
+	/opt/pf/pfctl -s states 2>/dev/null | grep -c 'icmp' || true
+	;;
+esac