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7c987a5ccb
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>
(cherry picked from commit 4cc79c2177)
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/* Bug 28213: test for NULL pointer dereference in mq_notify.
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Copyright (C) The GNU Toolchain Authors.
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This file is part of the GNU C Library.
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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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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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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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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <mqueue.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <support/check.h>
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static mqd_t m = -1;
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static const char msg[] = "hello";
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static void
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check_bz28213_cb (union sigval sv)
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{
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char buf[sizeof (msg)];
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(void) sv;
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TEST_VERIFY_EXIT ((size_t) mq_receive (m, buf, sizeof (buf), NULL)
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== sizeof (buf));
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TEST_VERIFY_EXIT (memcmp (buf, msg, sizeof (buf)) == 0);
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exit (0);
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}
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static void
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check_bz28213 (void)
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{
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struct sigevent sev;
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memset (&sev, '\0', sizeof (sev));
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sev.sigev_notify = SIGEV_THREAD;
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sev.sigev_notify_function = check_bz28213_cb;
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/* Step 1: Register & unregister notifier.
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Helper thread should receive NOTIFY_REMOVED notification.
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In a vulnerable version of glibc, NULL pointer dereference follows. */
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TEST_VERIFY_EXIT (mq_notify (m, &sev) == 0);
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TEST_VERIFY_EXIT (mq_notify (m, NULL) == 0);
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/* Step 2: Once again, register notification.
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Try to send one message.
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Test is considered successful, if the callback does exit (0). */
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TEST_VERIFY_EXIT (mq_notify (m, &sev) == 0);
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TEST_VERIFY_EXIT (mq_send (m, msg, sizeof (msg), 1) == 0);
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/* Wait... */
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pause ();
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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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static const char m_name[] = "/bz28213_queue";
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struct mq_attr m_attr;
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memset (&m_attr, '\0', sizeof (m_attr));
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m_attr.mq_maxmsg = 1;
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m_attr.mq_msgsize = sizeof (msg);
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m = mq_open (m_name,
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O_RDWR | O_CREAT | O_EXCL,
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0600,
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&m_attr);
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if (m < 0)
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{
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("POSIX message queues are not implemented\n");
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FAIL_EXIT1 ("Failed to create POSIX message queue: %m\n");
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}
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TEST_VERIFY_EXIT (mq_unlink (m_name) == 0);
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check_bz28213 ();
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return 0;
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}
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#include <support/test-driver.c>
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