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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2020 Viresh Kumar <viresh.kumar@linaro.org>
*/
/*\
* [Description]
*
* Basic init_module() failure tests.
*
* [Algorithm]
*
* Tests various failure scenarios for init_module().
*/
#include <linux/capability.h>
#include <errno.h>
#include "lapi/init_module.h"
#include "tst_module.h"
#include "tst_capability.h"
#define MODULE_NAME "init_module.ko"
static unsigned long size, zero_size;
static int kernel_lockdown, secure_boot;
static void *buf, *faulty_buf, *null_buf;
static struct tst_cap cap_req = TST_CAP(TST_CAP_REQ, CAP_SYS_MODULE);
static struct tst_cap cap_drop = TST_CAP(TST_CAP_DROP, CAP_SYS_MODULE);
static struct tcase {
const char *name;
void **buf;
unsigned long *size;
const char *param;
int cap;
int skip_in_lockdown;
int exp_errno;
} tcases[] = {
{"NULL-buffer", &null_buf, &size, "", 0, 0, EFAULT},
{"faulty-buffer", &faulty_buf, &size, "", 0, 0, EFAULT},
{"null-param", &buf, &size, NULL, 0, 1, EFAULT},
{"zero-size", &buf, &zero_size, "", 0, 0, ENOEXEC},
{"invalid_param", &buf, &size, "status=invalid", 0, 1, EINVAL},
{"no-perm", &buf, &size, "", 1, 0, EPERM},
{"module-exists", &buf, &size, "", 0, 1, EEXIST},
};
static void setup(void)
{
struct stat sb;
int fd;
tst_module_exists(MODULE_NAME, NULL);
kernel_lockdown = tst_lockdown_enabled() > 0;
secure_boot = tst_secureboot_enabled() > 0;
fd = SAFE_OPEN(MODULE_NAME, O_RDONLY|O_CLOEXEC);
SAFE_FSTAT(fd, &sb);
size = sb.st_size;
buf = SAFE_MMAP(0, size, PROT_READ|PROT_EXEC, MAP_PRIVATE, fd, 0);
SAFE_CLOSE(fd);
faulty_buf = tst_get_bad_addr(NULL);
}
static void run(unsigned int n)
{
struct tcase *tc = &tcases[n];
if (tc->skip_in_lockdown && (kernel_lockdown || secure_boot)) {
tst_res(TCONF, "Cannot load unsigned modules, skipping %s", tc->name);
return;
}
if (tc->cap)
tst_cap_action(&cap_drop);
/* Insert module twice */
if (tc->exp_errno == EEXIST)
tst_module_load(MODULE_NAME, NULL);
TST_EXP_FAIL(init_module(*tc->buf, *tc->size, tc->param),
tc->exp_errno, "TestName: %s", tc->name);
if (tc->exp_errno == EEXIST)
tst_module_unload(MODULE_NAME);
if (!TST_PASS && !TST_RET)
tst_module_unload(MODULE_NAME);
if (tc->cap)
tst_cap_action(&cap_req);
}
static void cleanup(void)
{
munmap(buf, size);
}
static struct tst_test test = {
.test = run,
.tcnt = ARRAY_SIZE(tcases),
.setup = setup,
.cleanup = cleanup,
.needs_root = 1,
};
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