mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 12:30:06 +00:00
librt: add test (bug 28213)
This test implements following logic: 1) Create POSIX message queue. Register a notification with mq_notify (using NULL attributes). Then immediately unregister the notification with mq_notify. Helper thread in a vulnerable version of glibc should cause NULL pointer dereference after these steps. 2) Once again, register the same notification. Try to send a dummy message. Test is considered successfulif the dummy message is successfully received by the callback function. Signed-off-by: Nikita Popov <npv1310@gmail.com> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
This commit is contained in:
parent
dc906e94f7
commit
4cc79c2177
@ -74,6 +74,7 @@ tests := tst-shm tst-timer tst-timer2 \
|
||||
tst-aio7 tst-aio8 tst-aio9 tst-aio10 \
|
||||
tst-mqueue1 tst-mqueue2 tst-mqueue3 tst-mqueue4 \
|
||||
tst-mqueue5 tst-mqueue6 tst-mqueue7 tst-mqueue8 tst-mqueue9 \
|
||||
tst-bz28213 \
|
||||
tst-timer3 tst-timer4 tst-timer5 \
|
||||
tst-cpuclock2 tst-cputimer1 tst-cputimer2 tst-cputimer3 \
|
||||
tst-shm-cancel \
|
||||
|
101
rt/tst-bz28213.c
Normal file
101
rt/tst-bz28213.c
Normal file
@ -0,0 +1,101 @@
|
||||
/* Bug 28213: test for NULL pointer dereference in mq_notify.
|
||||
Copyright (C) The GNU Toolchain Authors.
|
||||
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/>. */
|
||||
|
||||
#include <errno.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <mqueue.h>
|
||||
#include <signal.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <support/check.h>
|
||||
|
||||
static mqd_t m = -1;
|
||||
static const char msg[] = "hello";
|
||||
|
||||
static void
|
||||
check_bz28213_cb (union sigval sv)
|
||||
{
|
||||
char buf[sizeof (msg)];
|
||||
|
||||
(void) sv;
|
||||
|
||||
TEST_VERIFY_EXIT ((size_t) mq_receive (m, buf, sizeof (buf), NULL)
|
||||
== sizeof (buf));
|
||||
TEST_VERIFY_EXIT (memcmp (buf, msg, sizeof (buf)) == 0);
|
||||
|
||||
exit (0);
|
||||
}
|
||||
|
||||
static void
|
||||
check_bz28213 (void)
|
||||
{
|
||||
struct sigevent sev;
|
||||
|
||||
memset (&sev, '\0', sizeof (sev));
|
||||
sev.sigev_notify = SIGEV_THREAD;
|
||||
sev.sigev_notify_function = check_bz28213_cb;
|
||||
|
||||
/* Step 1: Register & unregister notifier.
|
||||
Helper thread should receive NOTIFY_REMOVED notification.
|
||||
In a vulnerable version of glibc, NULL pointer dereference follows. */
|
||||
TEST_VERIFY_EXIT (mq_notify (m, &sev) == 0);
|
||||
TEST_VERIFY_EXIT (mq_notify (m, NULL) == 0);
|
||||
|
||||
/* Step 2: Once again, register notification.
|
||||
Try to send one message.
|
||||
Test is considered successful, if the callback does exit (0). */
|
||||
TEST_VERIFY_EXIT (mq_notify (m, &sev) == 0);
|
||||
TEST_VERIFY_EXIT (mq_send (m, msg, sizeof (msg), 1) == 0);
|
||||
|
||||
/* Wait... */
|
||||
pause ();
|
||||
}
|
||||
|
||||
static int
|
||||
do_test (void)
|
||||
{
|
||||
static const char m_name[] = "/bz28213_queue";
|
||||
struct mq_attr m_attr;
|
||||
|
||||
memset (&m_attr, '\0', sizeof (m_attr));
|
||||
m_attr.mq_maxmsg = 1;
|
||||
m_attr.mq_msgsize = sizeof (msg);
|
||||
|
||||
m = mq_open (m_name,
|
||||
O_RDWR | O_CREAT | O_EXCL,
|
||||
0600,
|
||||
&m_attr);
|
||||
|
||||
if (m < 0)
|
||||
{
|
||||
if (errno == ENOSYS)
|
||||
FAIL_UNSUPPORTED ("POSIX message queues are not implemented\n");
|
||||
FAIL_EXIT1 ("Failed to create POSIX message queue: %m\n");
|
||||
}
|
||||
|
||||
TEST_VERIFY_EXIT (mq_unlink (m_name) == 0);
|
||||
|
||||
check_bz28213 ();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#include <support/test-driver.c>
|
Loading…
Reference in New Issue
Block a user