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Diffstat (limited to 'inet/tst-if_index-long.c')
| -rw-r--r-- | inet/tst-if_index-long.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/inet/tst-if_index-long.c b/inet/tst-if_index-long.c new file mode 100644 index 0000000000..3dc74874e5 --- /dev/null +++ b/inet/tst-if_index-long.c @@ -0,0 +1,61 @@ +/* Check for descriptor leak in if_nametoindex with a long interface name. + Copyright (C) 2018 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 + <http://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> |