From 28d91d754e423fd0df584bbfa9b903eacac21224 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Mon, 3 Sep 2018 10:36:51 +0200
Subject: [PATCH] libbb: fix potential NULL pointer use

function                                             old     new   delta
unicode_conv_to_printable2                           193     216     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 libbb/unicode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libbb/unicode.c b/libbb/unicode.c
index 9c4da50d3..d378175a4 100644
--- a/libbb/unicode.c
+++ b/libbb/unicode.c
@@ -1121,6 +1121,8 @@ static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char
 			dst[dst_len++] = ' ';
 		}
 	}
+	if (!dst) /* for example, if input was "" */
+		dst = xzalloc(1);
 	dst[dst_len] = '\0';
 	if (stats) {
 		stats->byte_count = dst_len;