--- busybox-1.18.3/scripts/kconfig/mconf.c
+++ busybox-1.18.3-menuconfig/scripts/kconfig/mconf.c
@@ -256,7 +256,7 @@ search_help[] = N_(
 	"          USB$ => find all CONFIG_ symbols ending with USB\n"
 	"\n");
 
-static char buf[4096], *bufptr = buf;
+static char buf[4096*10], *bufptr = buf;
 static char input_buf[4096];
 static const char filename[] = ".config";
 static char *args[1024], **argptr = args;