Ensure NULL terminator is not written past end of allocated buffer.

2017-11-13 23:57:18 +08:00 · 2017-11-13 23:57:18 +08:00 · 9f70ccd676
commit 9f70ccd676
parent db4e276662
1 changed files with 4 additions and 0 deletions
--- a/mdns.c
+++ b/mdns.c
@ -112,6 +112,10 @@ char *nlabel_to_str(const uint8_t *name) {
 		p += label_len;
 	}

+	// avoid writing NULL past end of buffer
+	if (buf_len == 0)
+		labelp--;
+
 	*labelp = '\0';

 	return label;