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commit 899478c2bfa00c5df8d8bedb52effbb065700278
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Thu Dec 6 15:39:50 2018 +0100
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inet/tst-if_index-long: New test case for CVE-2018-19591 [BZ #23927]
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diff --git a/inet/Makefile b/inet/Makefile
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index 09f5ba78fc5f3120..7782913b4c06f057 100644
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--- a/inet/Makefile
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+++ b/inet/Makefile
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@@ -52,7 +52,7 @@ aux := check_pf check_native ifreq
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tests := htontest test_ifindex tst-ntoa tst-ether_aton tst-network \
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tst-gethnm test-ifaddrs bug-if1 test-inet6_opt tst-ether_line \
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tst-getni1 tst-getni2 tst-inet6_rth tst-checks tst-checks-posix \
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- tst-sockaddr test-hnto-types
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+ tst-sockaddr test-hnto-types tst-if_index-long
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# tst-deadline must be linked statically so that we can access
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# internal functions.
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diff --git a/inet/tst-if_index-long.c b/inet/tst-if_index-long.c
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new file mode 100644
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index 0000000000000000..3dc74874e5310945
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--- /dev/null
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+++ b/inet/tst-if_index-long.c
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@@ -0,0 +1,61 @@
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+/* Check for descriptor leak in if_nametoindex with a long interface name.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+/* This test checks for a descriptor leak in case of a long interface
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+ name (CVE-2018-19591, bug 23927). */
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+
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+#include <errno.h>
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+#include <net/if.h>
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+#include <netdb.h>
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+#include <string.h>
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+#include <support/check.h>
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+#include <support/descriptors.h>
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+#include <support/support.h>
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+
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+static int
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+do_test (void)
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+{
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+ struct support_descriptors *descrs = support_descriptors_list ();
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+
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+ /* Prepare a name which is just as long as required for trigging the
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+ bug. */
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+ char name[IFNAMSIZ + 1];
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+ memset (name, 'A', IFNAMSIZ);
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+ name[IFNAMSIZ] = '\0';
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+ TEST_COMPARE (strlen (name), IFNAMSIZ);
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+ struct ifreq ifr;
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+ TEST_COMPARE (strlen (name), sizeof (ifr.ifr_name));
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+
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+ /* Test directly via if_nametoindex. */
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+ TEST_COMPARE (if_nametoindex (name), 0);
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+ TEST_COMPARE (errno, ENODEV);
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+ support_descriptors_check (descrs);
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+
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+ /* Same test via getaddrinfo. */
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+ char *host = xasprintf ("fea0::%%%s", name);
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+ struct addrinfo hints = { .ai_flags = AI_NUMERICHOST, };
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+ struct addrinfo *ai;
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+ TEST_COMPARE (getaddrinfo (host, NULL, &hints, &ai), EAI_NONAME);
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+ support_descriptors_check (descrs);
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+
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+ support_descriptors_free (descrs);
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+
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+ return 0;
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+}
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+
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+#include <support/test-driver.c>
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