1// SPDX-License-Identifier: GPL-2.0 2#include <linux/init_task.h> 3#include <linux/export.h> 4#include <linux/mqueue.h> 5#include <linux/sched.h> 6#include <linux/sched/sysctl.h> 7#include <linux/sched/rt.h> 8#include <linux/sched/task.h> 9#include <linux/init.h> 10#include <linux/fs.h> 11#include <linux/mm.h> 12#include <linux/audit.h> 13#include <linux/numa.h> 14#include <linux/scs.h> 15#include <linux/plist.h> 16 17#include <linux/uaccess.h> 18 19static struct signal_struct init_signals = { 20 .nr_threads = 1, 21 .thread_head = LIST_HEAD_INIT(init_task.thread_node), 22 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), 23 .shared_pending = { 24 .list = LIST_HEAD_INIT(init_signals.shared_pending.list), 25 .signal = {{0}} 26 }, 27 .multiprocess = HLIST_HEAD_INIT, 28 .rlim = INIT_RLIMITS, 29 .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), 30 .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), 31#ifdef CONFIG_POSIX_TIMERS 32 .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), 33 .cputimer = { 34 .cputime_atomic = INIT_CPUTIME_ATOMIC, 35 }, 36#endif 37 INIT_CPU_TIMERS(init_signals) 38 .pids = { 39 [PIDTYPE_PID] = &init_struct_pid, 40 [PIDTYPE_TGID] = &init_struct_pid, 41 [PIDTYPE_PGID] = &init_struct_pid, 42 [PIDTYPE_SID] = &init_struct_pid, 43 }, 44 INIT_PREV_CPUTIME(init_signals) 45}; 46 47static struct sighand_struct init_sighand = { 48 .count = REFCOUNT_INIT(1), 49 .action = { { { .sa_handler = SIG_DFL, } }, }, 50 .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), 51 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), 52}; 53 54#ifdef CONFIG_SHADOW_CALL_STACK 55unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = { 56 [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC 57}; 58#endif 59 60/* 61 * Set up the first task table, touch at your own risk!. Base=0, 62 * limit=0x1fffff (=2MB) 63 */ 64struct task_struct init_task __aligned(L1_CACHE_BYTES) = { 65#ifdef CONFIG_THREAD_INFO_IN_TASK 66 .thread_info = INIT_THREAD_INFO(init_task), 67 .stack_refcount = REFCOUNT_INIT(1), 68#endif 69 .__state = 0, 70 .stack = init_stack, 71 .usage = REFCOUNT_INIT(2), 72 .flags = PF_KTHREAD, 73 .prio = MAX_PRIO - 20, 74 .static_prio = MAX_PRIO - 20, 75 .normal_prio = MAX_PRIO - 20, 76 .policy = SCHED_NORMAL, 77 .cpus_ptr = &init_task.cpus_mask, 78 .user_cpus_ptr = NULL, 79 .cpus_mask = CPU_MASK_ALL, 80 .nr_cpus_allowed= NR_CPUS, 81 .mm = NULL, 82 .active_mm = &init_mm, 83 .faults_disabled_mapping = NULL, 84 .restart_block = { 85 .fn = do_no_restart_syscall, 86 }, 87 .se = { 88 .group_node = LIST_HEAD_INIT(init_task.se.group_node), 89 }, 90 .rt = { 91 .run_list = LIST_HEAD_INIT(init_task.rt.run_list), 92 .time_slice = RR_TIMESLICE, 93 }, 94 .tasks = LIST_HEAD_INIT(init_task.tasks), 95#ifdef CONFIG_SMP 96 .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), 97#endif 98#ifdef CONFIG_CGROUP_SCHED 99 .sched_task_group = &root_task_group, 100#endif 101 .ptraced = LIST_HEAD_INIT(init_task.ptraced), 102 .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), 103 .real_parent = &init_task, 104 .parent = &init_task, 105 .children = LIST_HEAD_INIT(init_task.children), 106 .sibling = LIST_HEAD_INIT(init_task.sibling), 107 .group_leader = &init_task, 108 RCU_POINTER_INITIALIZER(real_cred, &init_cred), 109 RCU_POINTER_INITIALIZER(cred, &init_cred), 110 .comm = INIT_TASK_COMM, 111 .thread = INIT_THREAD, 112 .fs = &init_fs, 113 .files = &init_files, 114#ifdef CONFIG_IO_URING 115 .io_uring = NULL, 116#endif 117 .signal = &init_signals, 118 .sighand = &init_sighand, 119 .nsproxy = &init_nsproxy, 120 .pending = { 121 .list = LIST_HEAD_INIT(init_task.pending.list), 122 .signal = {{0}} 123 }, 124 .blocked = {{0}}, 125 .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), 126 .journal_info = NULL, 127 INIT_CPU_TIMERS(init_task) 128 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), 129 .timer_slack_ns = 50000, /* 50 usec default slack */ 130 .thread_pid = &init_struct_pid, 131 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), 132#ifdef CONFIG_AUDIT 133 .loginuid = INVALID_UID, 134 .sessionid = AUDIT_SID_UNSET, 135#endif 136#ifdef CONFIG_PERF_EVENTS 137 .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), 138 .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), 139#endif 140#ifdef CONFIG_PREEMPT_RCU 141 .rcu_read_lock_nesting = 0, 142 .rcu_read_unlock_special.s = 0, 143 .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), 144 .rcu_blocked_node = NULL, 145#endif 146#ifdef CONFIG_TASKS_RCU 147 .rcu_tasks_holdout = false, 148 .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), 149 .rcu_tasks_idle_cpu = -1, 150 .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list), 151#endif 152#ifdef CONFIG_TASKS_TRACE_RCU 153 .trc_reader_nesting = 0, 154 .trc_reader_special.s = 0, 155 .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), 156 .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), 157#endif 158#ifdef CONFIG_CPUSETS 159 .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, 160 &init_task.alloc_lock), 161#endif 162#ifdef CONFIG_RT_MUTEXES 163 .pi_waiters = RB_ROOT_CACHED, 164 .pi_top_task = NULL, 165#endif 166 INIT_PREV_CPUTIME(init_task) 167#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 168 .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), 169 .vtime.starttime = 0, 170 .vtime.state = VTIME_SYS, 171#endif 172#ifdef CONFIG_NUMA_BALANCING 173 .numa_preferred_nid = NUMA_NO_NODE, 174 .numa_group = NULL, 175 .numa_faults = NULL, 176#endif 177#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) 178 .kasan_depth = 1, 179#endif 180#ifdef CONFIG_KCSAN 181 .kcsan_ctx = { 182 .scoped_accesses = {LIST_POISON1, NULL}, 183 }, 184#endif 185#ifdef CONFIG_TRACE_IRQFLAGS 186 .softirqs_enabled = 1, 187#endif 188#ifdef CONFIG_LOCKDEP 189 .lockdep_depth = 0, /* no locks held yet */ 190 .curr_chain_key = INITIAL_CHAIN_KEY, 191 .lockdep_recursion = 0, 192#endif 193#ifdef CONFIG_FUNCTION_GRAPH_TRACER 194 .ret_stack = NULL, 195 .tracing_graph_pause = ATOMIC_INIT(0), 196#endif 197#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) 198 .trace_recursion = 0, 199#endif 200#ifdef CONFIG_LIVEPATCH 201 .patch_state = KLP_UNDEFINED, 202#endif 203#ifdef CONFIG_SECURITY 204 .security = NULL, 205#endif 206#ifdef CONFIG_SECCOMP_FILTER 207 .seccomp = { .filter_count = ATOMIC_INIT(0) }, 208#endif 209}; 210EXPORT_SYMBOL(init_task); 211 212/* 213 * Initial thread structure. Alignment of this is handled by a special 214 * linker map entry. 215 */ 216#ifndef CONFIG_THREAD_INFO_IN_TASK 217struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); 218#endif 219