176 void __weak arch_release_task_struct(struct task_struct *tsk)  in arch_release_task_struct()  argument
187 static inline void free_task_struct(struct task_struct *tsk)  in free_task_struct()  argument
189 	kmem_cache_free(task_struct_cachep, tsk);  in free_task_struct()
211 static struct vm_struct *alloc_thread_stack_node_from_cache(struct task_struct *tsk, int node)  in alloc_thread_stack_node_from_cache()  argument
282 static void thread_stack_delayed_free(struct task_struct *tsk)  in thread_stack_delayed_free()  argument
284 	struct vm_stack *vm_stack = tsk->stack;  in thread_stack_delayed_free()
286 	vm_stack->stack_vm_area = tsk->stack_vm_area;  in thread_stack_delayed_free()
329 static int alloc_thread_stack_node(struct task_struct *tsk, int node)  in alloc_thread_stack_node()  argument
334 	vm_area = alloc_thread_stack_node_from_cache(tsk, node);  in alloc_thread_stack_node()
349 		tsk->stack_vm_area = vm_area;  in alloc_thread_stack_node()
350 		tsk->stack = stack;  in alloc_thread_stack_node()
370 	tsk->stack_vm_area = vm_area;  in alloc_thread_stack_node()
372 	tsk->stack = stack;  in alloc_thread_stack_node()
376 static void free_thread_stack(struct task_struct *tsk)  in free_thread_stack()  argument
378 	if (!try_release_thread_stack_to_cache(tsk->stack_vm_area))  in free_thread_stack()
379 		thread_stack_delayed_free(tsk);  in free_thread_stack()
381 	tsk->stack = NULL;  in free_thread_stack()
382 	tsk->stack_vm_area = NULL;  in free_thread_stack()
398 static void thread_stack_delayed_free(struct task_struct *tsk)  in thread_stack_delayed_free()  argument
400 	struct rcu_head *rh = tsk->stack;  in thread_stack_delayed_free()
405 static int alloc_thread_stack_node(struct task_struct *tsk, int node)  in alloc_thread_stack_node()  argument
411 		tsk->stack = kasan_reset_tag(page_address(page));  in alloc_thread_stack_node()
417 static void free_thread_stack(struct task_struct *tsk)  in free_thread_stack()  argument
419 	thread_stack_delayed_free(tsk);  in free_thread_stack()
420 	tsk->stack = NULL;  in free_thread_stack()
432 static void thread_stack_delayed_free(struct task_struct *tsk)  in thread_stack_delayed_free()  argument
434 	struct rcu_head *rh = tsk->stack;  in thread_stack_delayed_free()
439 static int alloc_thread_stack_node(struct task_struct *tsk, int node)  in alloc_thread_stack_node()  argument
444 	tsk->stack = stack;  in alloc_thread_stack_node()
448 static void free_thread_stack(struct task_struct *tsk)  in free_thread_stack()  argument
450 	thread_stack_delayed_free(tsk);  in free_thread_stack()
451 	tsk->stack = NULL;  in free_thread_stack()
480 static void account_kernel_stack(struct task_struct *tsk, int account)  in account_kernel_stack()  argument
483 		struct vm_struct *vm_area = task_stack_vm_area(tsk);  in account_kernel_stack()
490 		void *stack = task_stack_page(tsk);  in account_kernel_stack()
498 void exit_task_stack_account(struct task_struct *tsk)  in exit_task_stack_account()  argument
500 	account_kernel_stack(tsk, -1);  in exit_task_stack_account()
506 		vm_area = task_stack_vm_area(tsk);  in exit_task_stack_account()
512 static void release_task_stack(struct task_struct *tsk)  in release_task_stack()  argument
514 	if (WARN_ON(READ_ONCE(tsk->__state) != TASK_DEAD))  in release_task_stack()
517 	free_thread_stack(tsk);  in release_task_stack()
521 void put_task_stack(struct task_struct *tsk)  in put_task_stack()  argument
523 	if (refcount_dec_and_test(&tsk->stack_refcount))  in put_task_stack()
524 		release_task_stack(tsk);  in put_task_stack()
528 void free_task(struct task_struct *tsk)  in free_task()  argument
531 	WARN_ON_ONCE(tsk->seccomp.filter);  in free_task()
533 	release_user_cpus_ptr(tsk);  in free_task()
534 	scs_release(tsk);  in free_task()
541 	release_task_stack(tsk);  in free_task()
547 	WARN_ON_ONCE(refcount_read(&tsk->stack_refcount) != 0);  in free_task()
549 	rt_mutex_debug_task_free(tsk);  in free_task()
550 	ftrace_graph_exit_task(tsk);  in free_task()
551 	arch_release_task_struct(tsk);  in free_task()
552 	if (tsk->flags & PF_KTHREAD)  in free_task()
553 		free_kthread_struct(tsk);  in free_task()
554 	bpf_task_storage_free(tsk);  in free_task()
555 	free_task_struct(tsk);  in free_task()
775 void __put_task_struct(struct task_struct *tsk)  in __put_task_struct()  argument
777 	WARN_ON(!tsk->exit_state);  in __put_task_struct()
778 	WARN_ON(refcount_read(&tsk->usage));  in __put_task_struct()
779 	WARN_ON(tsk == current);  in __put_task_struct()
781 	unwind_task_free(tsk);  in __put_task_struct()
782 	io_uring_free(tsk);  in __put_task_struct()
783 	cgroup_task_free(tsk);  in __put_task_struct()
784 	task_numa_free(tsk, true);  in __put_task_struct()
785 	security_task_free(tsk);  in __put_task_struct()
786 	exit_creds(tsk);  in __put_task_struct()
787 	delayacct_tsk_free(tsk);  in __put_task_struct()
788 	put_signal_struct(tsk->signal);  in __put_task_struct()
789 	sched_core_free(tsk);  in __put_task_struct()
790 	free_task(tsk);  in __put_task_struct()
900 void set_task_stack_end_magic(struct task_struct *tsk)  in set_task_stack_end_magic()  argument
904 	stackend = end_of_stack(tsk);  in set_task_stack_end_magic()
910 	struct task_struct *tsk;  in dup_task_struct()  local
915 	tsk = alloc_task_struct_node(node);  in dup_task_struct()
916 	if (!tsk)  in dup_task_struct()
919 	err = arch_dup_task_struct(tsk, orig);  in dup_task_struct()
923 	err = alloc_thread_stack_node(tsk, node);  in dup_task_struct()
928 	refcount_set(&tsk->stack_refcount, 1);  in dup_task_struct()
930 	account_kernel_stack(tsk, 1);  in dup_task_struct()
932 	err = scs_prepare(tsk, node);  in dup_task_struct()
943 	tsk->seccomp.filter = NULL;  in dup_task_struct()
946 	setup_thread_stack(tsk, orig);  in dup_task_struct()
947 	clear_user_return_notifier(tsk);  in dup_task_struct()
948 	clear_tsk_need_resched(tsk);  in dup_task_struct()
949 	set_task_stack_end_magic(tsk);  in dup_task_struct()
950 	clear_syscall_work_syscall_user_dispatch(tsk);  in dup_task_struct()
953 	tsk->stack_canary = get_random_canary();  in dup_task_struct()
956 		tsk->cpus_ptr = &tsk->cpus_mask;  in dup_task_struct()
957 	dup_user_cpus_ptr(tsk, orig, node);  in dup_task_struct()
963 	refcount_set(&tsk->rcu_users, 2);  in dup_task_struct()
965 	refcount_set(&tsk->usage, 1);  in dup_task_struct()
967 	tsk->btrace_seq = 0;  in dup_task_struct()
969 	tsk->splice_pipe = NULL;  in dup_task_struct()
970 	tsk->task_frag.page = NULL;  in dup_task_struct()
971 	tsk->wake_q.next = NULL;  in dup_task_struct()
972 	tsk->worker_private = NULL;  in dup_task_struct()
974 	kcov_task_init(tsk);  in dup_task_struct()
975 	kmsan_task_create(tsk);  in dup_task_struct()
976 	kmap_local_fork(tsk);  in dup_task_struct()
979 	tsk->fail_nth = 0;  in dup_task_struct()
983 	tsk->throttle_disk = NULL;  in dup_task_struct()
984 	tsk->use_memdelay = 0;  in dup_task_struct()
988 	tsk->pasid_activated = 0;  in dup_task_struct()
992 	tsk->active_memcg = NULL;  in dup_task_struct()
996 	tsk->reported_split_lock = 0;  in dup_task_struct()
1000 	tsk->mm_cid.cid = MM_CID_UNSET;  in dup_task_struct()
1001 	tsk->mm_cid.active = 0;  in dup_task_struct()
1003 	return tsk;  in dup_task_struct()
1006 	exit_task_stack_account(tsk);  in dup_task_struct()
1007 	free_thread_stack(tsk);  in dup_task_struct()
1009 	free_task_struct(tsk);  in dup_task_struct()
1412 static void complete_vfork_done(struct task_struct *tsk)  in complete_vfork_done()  argument
1416 	task_lock(tsk);  in complete_vfork_done()
1417 	vfork = tsk->vfork_done;  in complete_vfork_done()
1419 		tsk->vfork_done = NULL;  in complete_vfork_done()
1422 	task_unlock(tsk);  in complete_vfork_done()
1458 static void mm_release(struct task_struct *tsk, struct mm_struct *mm)  in mm_release()  argument
1460 	uprobe_free_utask(tsk);  in mm_release()
1463 	deactivate_mm(tsk, mm);  in mm_release()
1470 	if (tsk->clear_child_tid) {  in mm_release()
1476 			put_user(0, tsk->clear_child_tid);  in mm_release()
1477 			do_futex(tsk->clear_child_tid, FUTEX_WAKE,  in mm_release()
1480 		tsk->clear_child_tid = NULL;  in mm_release()
1487 	if (tsk->vfork_done)  in mm_release()
1488 		complete_vfork_done(tsk);  in mm_release()
1491 void exit_mm_release(struct task_struct *tsk, struct mm_struct *mm)  in exit_mm_release()  argument
1493 	futex_exit_release(tsk);  in exit_mm_release()
1494 	mm_release(tsk, mm);  in exit_mm_release()
1497 void exec_mm_release(struct task_struct *tsk, struct mm_struct *mm)  in exec_mm_release()  argument
1499 	futex_exec_release(tsk);  in exec_mm_release()
1500 	mm_release(tsk, mm);  in exec_mm_release()
1513 static struct mm_struct *dup_mm(struct task_struct *tsk,  in dup_mm()  argument
1525 	if (!mm_init(mm, tsk, mm->user_ns))  in dup_mm()
1554 static int copy_mm(u64 clone_flags, struct task_struct *tsk)  in copy_mm()  argument
1558 	tsk->min_flt = tsk->maj_flt = 0;  in copy_mm()
1559 	tsk->nvcsw = tsk->nivcsw = 0;  in copy_mm()
1561 	tsk->last_switch_count = tsk->nvcsw + tsk->nivcsw;  in copy_mm()
1562 	tsk->last_switch_time = 0;  in copy_mm()
1565 	tsk->mm = NULL;  in copy_mm()
1566 	tsk->active_mm = NULL;  in copy_mm()
1581 		mm = dup_mm(tsk, current->mm);  in copy_mm()
1586 	tsk->mm = mm;  in copy_mm()
1587 	tsk->active_mm = mm;  in copy_mm()
1588 	sched_mm_cid_fork(tsk);  in copy_mm()
1592 static int copy_fs(u64 clone_flags, struct task_struct *tsk)  in copy_fs()  argument
1607 	tsk->fs = copy_fs_struct(fs);  in copy_fs()
1608 	if (!tsk->fs)  in copy_fs()
1613 static int copy_files(u64 clone_flags, struct task_struct *tsk,  in copy_files()  argument
1626 		tsk->files = NULL;  in copy_files()
1639 	tsk->files = newf;  in copy_files()
1643 static int copy_sighand(u64 clone_flags, struct task_struct *tsk)  in copy_sighand()  argument
1652 	RCU_INIT_POINTER(tsk->sighand, sig);  in copy_sighand()
1663 		flush_signal_handlers(tsk, 0);  in copy_sighand()
1692 static int copy_signal(u64 clone_flags, struct task_struct *tsk)  in copy_signal()  argument
1700 	tsk->signal = sig;  in copy_signal()
1710 	sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);  in copy_signal()
1711 	tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);  in copy_signal()
1714 	sig->curr_target = tsk;  in copy_signal()
1910 	struct task_struct *tsk = container_of(rhp, struct task_struct, rcu);  in __delayed_free_task()  local
1912 	free_task(tsk);  in __delayed_free_task()
1915 static __always_inline void delayed_free_task(struct task_struct *tsk)  in delayed_free_task()  argument
1918 		call_rcu(&tsk->rcu, __delayed_free_task);  in delayed_free_task()
1920 		free_task(tsk);  in delayed_free_task()
1923 static void copy_oom_score_adj(u64 clone_flags, struct task_struct *tsk)  in copy_oom_score_adj()  argument
1926 	if (!tsk->mm)  in copy_oom_score_adj()
1935 	mm_flags_set(MMF_MULTIPROCESS, tsk->mm);  in copy_oom_score_adj()
1937 	tsk->signal->oom_score_adj = current->signal->oom_score_adj;  in copy_oom_score_adj()
1938 	tsk->signal->oom_score_adj_min = current->signal->oom_score_adj_min;  in copy_oom_score_adj()