From c0b97b674939f1694249a6f15918fc585badadb9 Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <ivan@espressif.com>
Date: Fri, 11 Mar 2022 20:52:15 +0100
Subject: [PATCH] console: linenoise: fix usage of an uninitialized buffer

Reported in https://github.com/espressif/esp-idf/issues/6440

The issue could occur if esp_console_config_t::hint_color
was set to -1.
---
 components/console/linenoise/linenoise.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/components/console/linenoise/linenoise.c b/components/console/linenoise/linenoise.c
index ecdbf3a366..f074d67c99 100644
--- a/components/console/linenoise/linenoise.c
+++ b/components/console/linenoise/linenoise.c
@@ -501,9 +501,10 @@ void refreshShowHints(struct abuf *ab, struct linenoiseState *l, int plen) {
             int hintmaxlen = l->cols-(plen+l->len);
             if (hintlen > hintmaxlen) hintlen = hintmaxlen;
             if (bold == 1 && color == -1) color = 37;
-            if (color != -1 || bold != 0)
+            if (color != -1 || bold != 0) {
                 snprintf(seq,64,"\033[%d;%d;49m",bold,color);
-            abAppend(ab,seq,strlen(seq));
+                abAppend(ab,seq,strlen(seq));
+            }
             abAppend(ab,hint,hintlen);
             if (color != -1 || bold != 0)
                 abAppend(ab,"\033[0m",4);