File bsc_1068711.patch of Package ldns.22721

commit c8391790c96d4c8a2c10f9ab1460fda83b509fc2
Author: Willem Toorop <willem@nlnetlabs.nl>
Date:   Thu Apr 27 00:14:58 2017 +0200

    Check parse limit before t increment
    
    Thanks Stephan Zeisberg

diff --git a/parse.c b/parse.c
index e68627c2..947dbb89 100644
--- a/parse.c
+++ b/parse.c
@@ -118,6 +118,10 @@ ldns_fget_token_l(FILE *f, char *token, const char *delim, size_t limit, int *li
 			if (line_nr) {
 				*line_nr = *line_nr + 1;
 			}
+			if (limit > 0 && (i >= limit || (size_t)(t-token) >= limit)) {
+				*t = '\0';
+				return -1;
+			}
 			*t++ = ' ';
 			prev_c = c;
 			continue;