Index: sys/geom/eli/pkcs5v2.c
===================================================================
--- sys/geom/eli/pkcs5v2.c
+++ sys/geom/eli/pkcs5v2.c
@@ -108,6 +108,7 @@
 
 /*
  * Return the number of iterations which takes 'usecs' microseconds.
+ * Never return fewer than 100,000 iterations.
  */
 int
 pkcs5v2_calculate(int usecs)
@@ -119,7 +120,7 @@
 		if (v > 2000000)
 			break;
 	}
-	return (((intmax_t)iterations * (intmax_t)usecs) / v);
+	return MAX((((intmax_t)iterations * (intmax_t)usecs) / v), 100000);
 }
 #endif	/* !_STAND */
 #endif	/* !_KERNEL */