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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
* Copyright (c) Linux Test Project, 2020-2023
* Author: Saji Kumar.V.R <saji.kumar@wipro.com>
*/
/*\
* [Description]
*
* Test whether capset() can be used to modify the capabilities of a thread
* other than itself. Now, most linux distributions with kernel supporting
* VFS capabilities, this should be never permitted.
*/
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "tst_test.h"
#include "lapi/syscalls.h"
#include <linux/capability.h>
static struct __user_cap_header_struct *header;
static struct __user_cap_data_struct *data;
static pid_t child_pid;
static void verify_capset(void)
{
child_pid = SAFE_FORK();
if (!child_pid)
pause();
tst_res(TINFO, "Test capset() for a different process");
header->pid = child_pid;
TST_EXP_FAIL(tst_syscall(__NR_capset, header, data), EPERM, "capset()");
SAFE_KILL(child_pid, SIGTERM);
SAFE_WAIT(NULL);
}
static void setup(void)
{
header->version = 0x20080522;
TEST(tst_syscall(__NR_capget, header, data));
if (TST_RET == -1)
tst_brk(TBROK | TTERRNO, "capget data failed");
}
static struct tst_test test = {
.setup = setup,
.test_all = verify_capset,
.forks_child = 1,
.bufs = (struct tst_buffers []) {
{&header, .size = sizeof(*header)},
{&data, .size = 2 * sizeof(*data)},
{},
}
};
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