mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* Test that setuid, pthread_create, thread exit do not deadlock (bug 28361).
|
|
Copyright (C) 2021-2024 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/>. */
|
|
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
#include <unistd.h>
|
|
|
|
/* How many threads to launch during each iteration. */
|
|
enum { threads = 4 };
|
|
|
|
/* How many iterations to perform. This value seems to reproduce
|
|
bug 28361 in a bout one in three runs. */
|
|
enum { iterations = 5000 };
|
|
|
|
/* Cache of the real user ID used by setuid_thread. */
|
|
static uid_t uid;
|
|
|
|
/* Start routine for the threads. */
|
|
static void *
|
|
setuid_thread (void *closure)
|
|
{
|
|
TEST_COMPARE (setuid (uid), 0);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* The setxid machinery is still invoked even if the UID is
|
|
unchanged. (The kernel might reset other credentials as part of
|
|
the system call.) */
|
|
uid = getuid ();
|
|
|
|
for (int i = 0; i < iterations; ++i)
|
|
{
|
|
pthread_t thread_ids[threads];
|
|
for (int j = 0; j < threads; ++j)
|
|
thread_ids[j] = xpthread_create (NULL, setuid_thread, NULL);
|
|
for (int j = 0; j < threads; ++j)
|
|
xpthread_join (thread_ids[j]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|