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e953aeaa91
As the UAPI headers start to appear in distros, we need to avoid outdated versions of struct clone_args to be able to test modern features, named "struct __clone_args". Additionally update the struct size macro names to match UAPI names. Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/lkml/20200921075432.u4gis3s2o5qrsb5g@wittgenstein/ Signed-off-by: Kees Cook <keescook@chromium.org>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _CLONE3_SELFTESTS_H
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#define _CLONE3_SELFTESTS_H
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#define _GNU_SOURCE
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#include <sched.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <stdint.h>
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#include <syscall.h>
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#include <sys/wait.h>
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#include "../kselftest.h"
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#define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr)))
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#ifndef CLONE_INTO_CGROUP
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#define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */
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#endif
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#ifndef __NR_clone3
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#define __NR_clone3 -1
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#endif
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struct __clone_args {
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__aligned_u64 flags;
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__aligned_u64 pidfd;
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__aligned_u64 child_tid;
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__aligned_u64 parent_tid;
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__aligned_u64 exit_signal;
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__aligned_u64 stack;
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__aligned_u64 stack_size;
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__aligned_u64 tls;
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#ifndef CLONE_ARGS_SIZE_VER0
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#define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */
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#endif
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__aligned_u64 set_tid;
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__aligned_u64 set_tid_size;
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#ifndef CLONE_ARGS_SIZE_VER1
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#define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */
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#endif
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__aligned_u64 cgroup;
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#ifndef CLONE_ARGS_SIZE_VER2
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#define CLONE_ARGS_SIZE_VER2 88 /* sizeof third published struct */
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#endif
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};
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static pid_t sys_clone3(struct __clone_args *args, size_t size)
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{
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fflush(stdout);
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fflush(stderr);
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return syscall(__NR_clone3, args, size);
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}
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static inline void test_clone3_supported(void)
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{
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pid_t pid;
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struct __clone_args args = {};
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if (__NR_clone3 < 0)
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ksft_exit_skip("clone3() syscall is not supported\n");
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/* Set to something that will always cause EINVAL. */
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args.exit_signal = -1;
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pid = sys_clone3(&args, sizeof(args));
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if (!pid)
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exit(EXIT_SUCCESS);
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if (pid > 0) {
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wait(NULL);
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ksft_exit_fail_msg(
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"Managed to create child process with invalid exit_signal\n");
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}
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if (errno == ENOSYS)
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ksft_exit_skip("clone3() syscall is not supported\n");
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ksft_print_msg("clone3() syscall supported\n");
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}
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#endif /* _CLONE3_SELFTESTS_H */
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