Index: head/lib/libc/string/strstr.c
===================================================================
--- head/lib/libc/string/strstr.c
+++ head/lib/libc/string/strstr.c
@@ -143,9 +143,8 @@
 		/* Check last byte first; advance by shift on mismatch */
 		if (BITOP(byteset, h[l-1], &)) {
 			k = l-shift[h[l-1]];
-			//printf("adv by %zu (on %c) at [%s] (%zu;l=%zu)\n", k, h[l-1], h, shift[h[l-1]], l);
 			if (k) {
-				if (mem0 && mem && k < p) k = l-p;
+				if (k < mem) k = mem;
 				h += k;
 				mem = 0;
 				continue;