141585bbeSAdrian Reber /* SPDX-License-Identifier: GPL-2.0 */ 241585bbeSAdrian Reber 341585bbeSAdrian Reber #ifndef _CLONE3_SELFTESTS_H 441585bbeSAdrian Reber #define _CLONE3_SELFTESTS_H 541585bbeSAdrian Reber 641585bbeSAdrian Reber #define _GNU_SOURCE 741585bbeSAdrian Reber #include <sched.h> 89bd5910dSChristian Brauner #include <linux/sched.h> 99bd5910dSChristian Brauner #include <linux/types.h> 1041585bbeSAdrian Reber #include <stdint.h> 1141585bbeSAdrian Reber #include <syscall.h> 129bd5910dSChristian Brauner #include <sys/wait.h> 139bd5910dSChristian Brauner 149bd5910dSChristian Brauner #include "../kselftest.h" 1541585bbeSAdrian Reber 1641585bbeSAdrian Reber #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr))) 1741585bbeSAdrian Reber 189bd5910dSChristian Brauner #ifndef CLONE_INTO_CGROUP 199bd5910dSChristian Brauner #define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */ 209bd5910dSChristian Brauner #endif 219bd5910dSChristian Brauner 2241585bbeSAdrian Reber #ifndef __NR_clone3 2341585bbeSAdrian Reber #define __NR_clone3 -1 24*e953aeaaSKees Cook #endif 25*e953aeaaSKees Cook 26*e953aeaaSKees Cook struct __clone_args { 2741585bbeSAdrian Reber __aligned_u64 flags; 2841585bbeSAdrian Reber __aligned_u64 pidfd; 2941585bbeSAdrian Reber __aligned_u64 child_tid; 3041585bbeSAdrian Reber __aligned_u64 parent_tid; 3141585bbeSAdrian Reber __aligned_u64 exit_signal; 3241585bbeSAdrian Reber __aligned_u64 stack; 3341585bbeSAdrian Reber __aligned_u64 stack_size; 3441585bbeSAdrian Reber __aligned_u64 tls; 35*e953aeaaSKees Cook #ifndef CLONE_ARGS_SIZE_VER0 36*e953aeaaSKees Cook #define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */ 37*e953aeaaSKees Cook #endif 3841585bbeSAdrian Reber __aligned_u64 set_tid; 3941585bbeSAdrian Reber __aligned_u64 set_tid_size; 40*e953aeaaSKees Cook #ifndef CLONE_ARGS_SIZE_VER1 41*e953aeaaSKees Cook #define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */ 42*e953aeaaSKees Cook #endif 439bd5910dSChristian Brauner __aligned_u64 cgroup; 44*e953aeaaSKees Cook #ifndef CLONE_ARGS_SIZE_VER2 45*e953aeaaSKees Cook #define CLONE_ARGS_SIZE_VER2 88 /* sizeof third published struct */ 46*e953aeaaSKees Cook #endif 4741585bbeSAdrian Reber }; 4841585bbeSAdrian Reber sys_clone3(struct __clone_args * args,size_t size)49*e953aeaaSKees Cookstatic pid_t sys_clone3(struct __clone_args *args, size_t size) 5041585bbeSAdrian Reber { 514f5c289eSAndrei Vagin fflush(stdout); 524f5c289eSAndrei Vagin fflush(stderr); 5341585bbeSAdrian Reber return syscall(__NR_clone3, args, size); 5441585bbeSAdrian Reber } 5541585bbeSAdrian Reber test_clone3_supported(void)5611fde161SChristian Braunerstatic inline void test_clone3_supported(void) 5711fde161SChristian Brauner { 5811fde161SChristian Brauner pid_t pid; 59*e953aeaaSKees Cook struct __clone_args args = {}; 6011fde161SChristian Brauner 6111fde161SChristian Brauner if (__NR_clone3 < 0) 6211fde161SChristian Brauner ksft_exit_skip("clone3() syscall is not supported\n"); 6311fde161SChristian Brauner 6411fde161SChristian Brauner /* Set to something that will always cause EINVAL. */ 6511fde161SChristian Brauner args.exit_signal = -1; 6611fde161SChristian Brauner pid = sys_clone3(&args, sizeof(args)); 6711fde161SChristian Brauner if (!pid) 6811fde161SChristian Brauner exit(EXIT_SUCCESS); 6911fde161SChristian Brauner 7011fde161SChristian Brauner if (pid > 0) { 7111fde161SChristian Brauner wait(NULL); 7211fde161SChristian Brauner ksft_exit_fail_msg( 7311fde161SChristian Brauner "Managed to create child process with invalid exit_signal\n"); 7411fde161SChristian Brauner } 7511fde161SChristian Brauner 7611fde161SChristian Brauner if (errno == ENOSYS) 7711fde161SChristian Brauner ksft_exit_skip("clone3() syscall is not supported\n"); 7811fde161SChristian Brauner 7911fde161SChristian Brauner ksft_print_msg("clone3() syscall supported\n"); 8011fde161SChristian Brauner } 8111fde161SChristian Brauner 8241585bbeSAdrian Reber #endif /* _CLONE3_SELFTESTS_H */ 83