114 lines
3.2 KiB
C
114 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 clone3() test to check various failures.
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include "tst_test.h"
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#include "lapi/clone.h"
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static struct clone_args *valid_args, *invalid_args;
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unsigned long stack;
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static int *invalid_address;
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static struct tcase {
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const char *name;
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struct clone_args **args;
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size_t size;
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uint64_t flags;
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int **pidfd;
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int exit_signal;
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unsigned long stack;
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unsigned long stack_size;
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unsigned long tls;
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int exp_errno;
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} tcases[] = {
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{"invalid args", &invalid_args, sizeof(*valid_args), 0, NULL, SIGCHLD, 0, 0, 0, EFAULT},
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{"zero size", &valid_args, 0, 0, NULL, SIGCHLD, 0, 0, 0, EINVAL},
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{"short size", &valid_args, sizeof(*valid_args) - 1, 0, NULL, SIGCHLD, 0, 0, 0, EINVAL},
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{"extra size", &valid_args, sizeof(*valid_args) + 1, 0, NULL, SIGCHLD, 0, 0, 0, EFAULT},
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{"sighand-no-VM", &valid_args, sizeof(*valid_args), CLONE_SIGHAND, NULL, SIGCHLD, 0, 0, 0, EINVAL},
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{"thread-no-sighand", &valid_args, sizeof(*valid_args), CLONE_THREAD, NULL, SIGCHLD, 0, 0, 0, EINVAL},
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{"fs-newns", &valid_args, sizeof(*valid_args), CLONE_FS | CLONE_NEWNS, NULL, SIGCHLD, 0, 0, 0, EINVAL},
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{"invalid pidfd", &valid_args, sizeof(*valid_args), CLONE_PIDFD, &invalid_address, SIGCHLD, 0, 0, 0, EFAULT},
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{"invalid signal", &valid_args, sizeof(*valid_args), 0, NULL, CSIGNAL + 1, 0, 0, 0, EINVAL},
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{"zero-stack-size", &valid_args, sizeof(*valid_args), 0, NULL, SIGCHLD, (unsigned long)&stack, 0, 0, EINVAL},
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{"invalid-stack", &valid_args, sizeof(*valid_args), 0, NULL, SIGCHLD, 0, 4, 0, EINVAL},
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/*
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* Don't test CLONE_CHILD_SETTID and CLONE_PARENT_SETTID:
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* When the parent tid is written to the memory location for
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* CLONE_PARENT_SETTID we're past the point of no return of process
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* creation, i.e. the return value from put_user() isn't checked and
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* can't be checked anymore so you'd never receive EFAULT for a bogus
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* parent_tid memory address.
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*
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* https://lore.kernel.org/linux-m68k/20200627122332.ki2otaiw3v7wndbl@wittgenstein/T/#u
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*/
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};
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static void setup(void)
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{
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clone3_supported_by_kernel();
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void *p = tst_get_bad_addr(NULL);
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invalid_args = p;
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invalid_address = p;
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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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struct clone_args *args = *tc->args;
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if (args == valid_args) {
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args->flags = tc->flags;
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if (tc->pidfd)
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args->pidfd = (uint64_t)(*tc->pidfd);
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else
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args->pidfd = 0;
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args->exit_signal = tc->exit_signal;
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args->stack = tc->stack;
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args->stack_size = tc->stack_size;
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args->tls = tc->tls;
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}
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TEST(clone3(args, tc->size));
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if (!TST_RET)
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exit(EXIT_SUCCESS);
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if (TST_RET >= 0) {
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tst_res(TFAIL, "%s: clone3() passed unexpectedly", tc->name);
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return;
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}
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if (tc->exp_errno != TST_ERR) {
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tst_res(TFAIL | TTERRNO, "%s: clone3() should fail with %s",
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tc->name, tst_strerrno(tc->exp_errno));
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return;
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}
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tst_res(TPASS | TTERRNO, "%s: clone3() failed as expected", tc->name);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.test = run,
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.setup = setup,
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.needs_tmpdir = 1,
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.bufs = (struct tst_buffers []) {
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{&valid_args, .size = sizeof(*valid_args)},
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{},
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}
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};
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