147 lines
3.2 KiB
C
147 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 Viresh Kumar <viresh.kumar@linaro.org>
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*/
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/*\
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* [Description]
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*
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* Basic finit_module() failure tests.
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*
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* [Algorithm]
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*
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* Tests various failure scenarios for finit_module().
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*/
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#include <linux/capability.h>
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#include <errno.h>
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#include "lapi/init_module.h"
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#include "tst_module.h"
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#include "tst_capability.h"
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#define MODULE_NAME "finit_module.ko"
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#define TEST_DIR "test_dir"
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static char *mod_path;
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static int fd, fd_zero, fd_invalid = -1, fd_dir;
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static int kernel_lockdown;
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static struct tst_cap cap_req = TST_CAP(TST_CAP_REQ, CAP_SYS_MODULE);
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static struct tst_cap cap_drop = TST_CAP(TST_CAP_DROP, CAP_SYS_MODULE);
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struct tcase {
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const char *name;
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int *fd;
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const char *param;
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int open_flags;
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int flags;
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int cap;
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int exp_errno;
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int skip_in_lockdown;
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void (*fix_errno)(struct tcase *tc);
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};
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static void bad_fd_setup(struct tcase *tc)
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{
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if (tst_kvercmp(4, 6, 0) < 0)
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tc->exp_errno = ENOEXEC;
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else
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tc->exp_errno = EBADF;
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}
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static void dir_setup(struct tcase *tc)
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{
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if (tst_kvercmp(4, 6, 0) < 0)
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tc->exp_errno = EISDIR;
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else
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tc->exp_errno = EINVAL;
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}
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static struct tcase tcases[] = {
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{"invalid-fd", &fd_invalid, "", O_RDONLY | O_CLOEXEC, 0, 0, 0, 0,
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bad_fd_setup},
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{"zero-fd", &fd_zero, "", O_RDONLY | O_CLOEXEC, 0, 0, EINVAL, 0, NULL},
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{"null-param", &fd, NULL, O_RDONLY | O_CLOEXEC, 0, 0, EFAULT, 1, NULL},
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{"invalid-param", &fd, "status=invalid", O_RDONLY | O_CLOEXEC, 0, 0,
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EINVAL, 1, NULL},
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{"invalid-flags", &fd, "", O_RDONLY | O_CLOEXEC, -1, 0, EINVAL, 0,
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NULL},
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{"no-perm", &fd, "", O_RDONLY | O_CLOEXEC, 0, 1, EPERM, 0, NULL},
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{"module-exists", &fd, "", O_RDONLY | O_CLOEXEC, 0, 0, EEXIST, 1,
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NULL},
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{"file-not-readable", &fd, "", O_WRONLY | O_CLOEXEC, 0, 0, EBADF, 0,
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NULL},
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{"file-readwrite", &fd, "", O_RDWR | O_CLOEXEC, 0, 0, ETXTBSY, 0,
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NULL},
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{"directory", &fd_dir, "", O_RDONLY | O_CLOEXEC, 0, 0, 0, 0, dir_setup},
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};
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static void setup(void)
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{
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unsigned long int i;
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tst_module_exists(MODULE_NAME, &mod_path);
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kernel_lockdown = tst_lockdown_enabled();
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SAFE_MKDIR(TEST_DIR, 0700);
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fd_dir = SAFE_OPEN(TEST_DIR, O_DIRECTORY);
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for (i = 0; i < ARRAY_SIZE(tcases); i++) {
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if (tcases[i].fix_errno)
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tcases[i].fix_errno(&tcases[i]);
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}
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}
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static void cleanup(void)
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{
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SAFE_CLOSE(fd_dir);
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}
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static void run(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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if (tc->skip_in_lockdown && kernel_lockdown) {
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tst_res(TCONF, "Kernel is locked down, skipping %s", tc->name);
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return;
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}
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fd = SAFE_OPEN(mod_path, tc->open_flags);
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if (tc->cap)
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tst_cap_action(&cap_drop);
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/* Insert module twice */
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if (tc->exp_errno == EEXIST)
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tst_module_load(MODULE_NAME, NULL);
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TST_EXP_FAIL(finit_module(*tc->fd, tc->param, tc->flags), tc->exp_errno,
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"TestName: %s", tc->name);
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if (tc->exp_errno == EEXIST)
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tst_module_unload(MODULE_NAME);
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if (!TST_PASS && !TST_RET)
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tst_module_unload(MODULE_NAME);
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if (tc->cap)
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tst_cap_action(&cap_req);
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.tags = (const struct tst_tag[]) {
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{"linux-git", "032146cda855"},
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{"linux-git", "39d637af5aa7"},
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{}
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},
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.test = run,
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.cleanup = cleanup,
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.needs_tmpdir = 1,
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.needs_root = 1,
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};
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