mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/* Check for descriptor leak in if_nametoindex with a long interface name.
|
|
Copyright (C) 2018-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This test checks for a descriptor leak in case of a long interface
|
|
name (CVE-2018-19591, bug 23927). */
|
|
|
|
#include <errno.h>
|
|
#include <net/if.h>
|
|
#include <netdb.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/descriptors.h>
|
|
#include <support/support.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
struct support_descriptors *descrs = support_descriptors_list ();
|
|
|
|
/* Prepare a name which is just as long as required for trigging the
|
|
bug. */
|
|
char name[IFNAMSIZ + 1];
|
|
memset (name, 'A', IFNAMSIZ);
|
|
name[IFNAMSIZ] = '\0';
|
|
TEST_COMPARE (strlen (name), IFNAMSIZ);
|
|
struct ifreq ifr;
|
|
TEST_COMPARE (strlen (name), sizeof (ifr.ifr_name));
|
|
|
|
/* Test directly via if_nametoindex. */
|
|
TEST_COMPARE (if_nametoindex (name), 0);
|
|
TEST_COMPARE (errno, ENODEV);
|
|
support_descriptors_check (descrs);
|
|
|
|
/* Same test via getaddrinfo. */
|
|
char *host = xasprintf ("fea0::%%%s", name);
|
|
struct addrinfo hints = { .ai_flags = AI_NUMERICHOST, };
|
|
struct addrinfo *ai;
|
|
TEST_COMPARE (getaddrinfo (host, NULL, &hints, &ai), EAI_NONAME);
|
|
support_descriptors_check (descrs);
|
|
|
|
support_descriptors_free (descrs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|