From d530e92f59ae9bb2d47066c3c460b25d2ffeb211 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sun, 28 Oct 2018 01:33:23 +0200
Subject: [PATCH] voutf: fix bad arethmetic when outputting warnings to stderr

CVE-2018-16842
Reported-by: Brian Carpenter
Bug: https://curl.haxx.se/docs/CVE-2018-16842.html
---
 src/tool_msgs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/src/tool_msgs.c
+++ b/src/tool_msgs.c
@@ -67,7 +67,7 @@ static void voutf(struct GlobalConfig *c
         (void)fwrite(ptr, cut + 1, 1, config->errors);
         fputs("\n", config->errors);
         ptr += cut + 1; /* skip the space too */
-        len -= cut;
+        len -= cut + 1;
       }
       else {
         fputs(ptr, config->errors);
