From 40ae9b56174513c9e843f7b479bc64e14b2f1b64 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 30 Dec 2006 19:30:20 +0000
Subject: [PATCH] prevent buffer underflows with empty lines

---
 scripts/kconfig/conf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index a95ba93e2..ca722b05d 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -390,7 +390,7 @@ static int conf_choice(struct menu *menu)
 		}
 		if (!child)
 			continue;
-		if (line[strlen(line) - 1] == '?') {
+		if (strlen(line) > 0 && line[strlen(line) - 1] == '?') {
 			printf("\n%s\n", child->sym->help ?
 				child->sym->help : nohelp_text);
 			continue;