[hackers] [quark] Check inet_pton() for system error || Laslo Hunhold

[git]

commit af61e37a3a282fb78a9f5ae308bb3f56d11d7406
Author:     Laslo Hunhold <d...@frign.de>
AuthorDate: Sun Jul 9 00:11:30 2017 +0200
Commit:     Laslo Hunhold <d...@frign.de>
CommitDate: Sun Jul 9 00:11:30 2017 +0200

    Check inet_pton() for system error

diff --git a/quark.c b/quark.c
index af6e536..2a836b0 100644
--- a/quark.c
+++ b/quark.c
@@ -590,8 +590,10 @@ sendresponse(int fd, struct request *r)
                /* RFC 2732 specifies to use brackets for IPv6-addresses in
                 * URLs, so we need to check if our host is one and honor that
                 * later when we fill the "Location"-field */
-               ipv6host = inet_pton(AF_INET6, r->field[REQ_HOST][0] ?
-                                    r->field[REQ_HOST] : host, &res);
+               if ((ipv6host = inet_pton(AF_INET6, r->field[REQ_HOST][0] ?
+                                         r->field[REQ_HOST] : host, &res)) < 
0) {
+                       return sendstatus(fd, S_INTERNAL_SERVER_ERROR);
+               }
 
                /* encode realtarget */
                encode(realtarget, tmptarget);