109 lines
2.1 KiB
C
109 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) International Business Machines Corp., 2001
|
|
*/
|
|
|
|
/*
|
|
* DESCRIPTION
|
|
*
|
|
* 1) shmat() fails and set errno to EINVAL when shmid is invalid.
|
|
* 2) shmat() fails and set errno to EINVAL when shmaddr is not page
|
|
* aligned and SHM_RND is not given
|
|
* 3) shmat() fails and set errno to EACCES when the shm resource has
|
|
* no read/write permission.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ipc.h>
|
|
#include <sys/shm.h>
|
|
#include <pwd.h>
|
|
|
|
#include "tst_test.h"
|
|
#include "tst_safe_sysv_ipc.h"
|
|
#include "libnewipc.h"
|
|
|
|
static int shm_id1 = -1;
|
|
static int shm_id2 = -1;
|
|
static void *aligned_addr;
|
|
static void *unaligned_addr;
|
|
static key_t shm_key1;
|
|
static struct passwd *pw;
|
|
|
|
static struct test_case_t {
|
|
int *shmid;
|
|
void **shmaddr;
|
|
int exp_err;
|
|
int exp_user;
|
|
} tcases[] = {
|
|
{&shm_id1, &aligned_addr, EINVAL, 0},
|
|
{&shm_id2, &unaligned_addr, EINVAL, 0},
|
|
{&shm_id2, &aligned_addr, EACCES, 1},
|
|
};
|
|
|
|
static void verify_shmat(struct test_case_t *tc)
|
|
{
|
|
void *addr;
|
|
|
|
addr = shmat(*tc->shmid, *tc->shmaddr, 0);
|
|
if (addr != (void *)-1) {
|
|
tst_res(TFAIL, "shmat() succeeded unexpectedly");
|
|
return;
|
|
}
|
|
|
|
if (errno == tc->exp_err) {
|
|
tst_res(TPASS | TERRNO, "shmat() failed as expected");
|
|
} else {
|
|
tst_res(TFAIL | TERRNO, "shmat() failed unexpectedly,"
|
|
"expected: %s", tst_strerrno(tc->exp_err));
|
|
}
|
|
}
|
|
|
|
static void do_shmat(unsigned int n)
|
|
{
|
|
pid_t pid;
|
|
|
|
struct test_case_t *tc = &tcases[n];
|
|
|
|
if (!tc->exp_user) {
|
|
verify_shmat(tc);
|
|
} else {
|
|
pid = SAFE_FORK();
|
|
if (pid) {
|
|
tst_reap_children();
|
|
} else {
|
|
SAFE_SETUID(pw->pw_uid);
|
|
verify_shmat(tc);
|
|
exit(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
aligned_addr = PROBE_FREE_ADDR();
|
|
unaligned_addr = aligned_addr + SHMLBA - 1;
|
|
|
|
shm_key1 = GETIPCKEY();
|
|
|
|
shm_id2 = SAFE_SHMGET(shm_key1, INT_SIZE, SHM_RW | IPC_CREAT | IPC_EXCL);
|
|
|
|
pw = SAFE_GETPWNAM("nobody");
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (shm_id2 != -1)
|
|
SAFE_SHMCTL(shm_id2, IPC_RMID, NULL);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_root = 1,
|
|
.forks_child = 1,
|
|
.test = do_shmat,
|
|
.tcnt = ARRAY_SIZE(tcases),
|
|
.setup = setup,
|
|
.cleanup = cleanup
|
|
};
|