Based on 144b3d9e093dd9310cd9590bec039dc43a7e2ad6 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 7 Nov 2014 16:34:00 +0100
Subject: [PATCH] utf8: when looking at the next unichar, honour the size
 parameter, in utf8_is_printable_newline()

---
 src/shared/utf8.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- src/shared/utf8.c
+++ src/shared/utf8.c	2014-11-10 14:20:28.094539264 +0000
@@ -143,9 +143,14 @@ bool utf8_is_printable_newline(const cha
 
         for (p = (const uint8_t*) str; length;) {
                 int encoded_len = utf8_encoded_valid_unichar((const char *)p);
-                int val = utf8_encoded_to_unichar((const char*)p);
+                int val;
 
-                if (encoded_len < 0 || val < 0 || is_unicode_control(val) ||
+                if (encoded_len < 0 ||
+                    (size_t) encoded_len > length)
+                         return false;
+
+                val = utf8_encoded_to_unichar((const char*)p);
+                if (val < 0 || is_unicode_control(val) ||
                     (!newline && val == '\n'))
                         return false;