44 struct cred init_cred = {
70 	struct cred *cred = container_of(rcu, struct cred, rcu);  in put_cred_rcu()  local
72 	kdebug("put_cred_rcu(%p)", cred);  in put_cred_rcu()
74 	if (atomic_long_read(&cred->usage) != 0)  in put_cred_rcu()
76 		      cred, atomic_long_read(&cred->usage));  in put_cred_rcu()
78 	security_cred_free(cred);  in put_cred_rcu()
79 	key_put(cred->session_keyring);  in put_cred_rcu()
80 	key_put(cred->process_keyring);  in put_cred_rcu()
81 	key_put(cred->thread_keyring);  in put_cred_rcu()
82 	key_put(cred->request_key_auth);  in put_cred_rcu()
83 	if (cred->group_info)  in put_cred_rcu()
84 		put_group_info(cred->group_info);  in put_cred_rcu()
85 	free_uid(cred->user);  in put_cred_rcu()
86 	if (cred->ucounts)  in put_cred_rcu()
87 		put_ucounts(cred->ucounts);  in put_cred_rcu()
88 	put_user_ns(cred->user_ns);  in put_cred_rcu()
89 	kmem_cache_free(cred_jar, cred);  in put_cred_rcu()
98 void __put_cred(struct cred *cred)  in __put_cred()  argument
100 	kdebug("__put_cred(%p{%ld})", cred,  in __put_cred()
101 	       atomic_long_read(&cred->usage));  in __put_cred()
103 	BUG_ON(atomic_long_read(&cred->usage) != 0);  in __put_cred()
104 	BUG_ON(cred == current->cred);  in __put_cred()
105 	BUG_ON(cred == current->real_cred);  in __put_cred()
107 	if (cred->non_rcu)  in __put_cred()
108 		put_cred_rcu(&cred->rcu);  in __put_cred()
110 		call_rcu(&cred->rcu, put_cred_rcu);  in __put_cred()
119 	struct cred *real_cred, *cred;  in exit_creds()  local
121 	kdebug("exit_creds(%u,%p,%p,{%ld})", tsk->pid, tsk->real_cred, tsk->cred,  in exit_creds()
122 	       atomic_long_read(&tsk->cred->usage));  in exit_creds()
124 	real_cred = (struct cred *) tsk->real_cred;  in exit_creds()
127 	cred = (struct cred *) tsk->cred;  in exit_creds()
128 	tsk->cred = NULL;  in exit_creds()
130 	if (real_cred == cred) {  in exit_creds()
131 		put_cred_many(cred, 2);  in exit_creds()
134 		put_cred(cred);  in exit_creds()
153 const struct cred *get_task_cred(struct task_struct *task)  in get_task_cred()
155 	const struct cred *cred;  in get_task_cred()  local
160 		cred = __task_cred((task));  in get_task_cred()
161 		BUG_ON(!cred);  in get_task_cred()
162 	} while (!get_cred_rcu(cred));  in get_task_cred()
165 	return cred;  in get_task_cred()
173 struct cred *cred_alloc_blank(void)  in cred_alloc_blank()
175 	struct cred *new;  in cred_alloc_blank()
206 struct cred *prepare_creds(void)  in prepare_creds()
209 	const struct cred *old;  in prepare_creds()
210 	struct cred *new;  in prepare_creds()
218 	old = task->cred;  in prepare_creds()
219 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
257 struct cred *prepare_exec_creds(void)  in prepare_exec_creds()
259 	struct cred *new;  in prepare_exec_creds()
292 	struct cred *new;  in copy_creds()
301 		!p->cred->thread_keyring &&  in copy_creds()
305 		p->real_cred = get_cred_many(p->cred, 2);  in copy_creds()
307 		       p->cred, atomic_long_read(&p->cred->usage));  in copy_creds()
344 	p->cred = p->real_cred = get_cred(new);  in copy_creds()
353 static bool cred_cap_issubset(const struct cred *set, const struct cred *subset)  in cred_cap_issubset()
392 int commit_creds(struct cred *new)  in commit_creds()
395 	const struct cred *old = task->real_cred;  in commit_creds()
400 	BUG_ON(task->cred != old);  in commit_creds()
439 	rcu_assign_pointer(task->cred, new);  in commit_creds()
469 void abort_creds(struct cred *new)  in abort_creds()
493 int cred_fscmp(const struct cred *a, const struct cred *b)  in cred_fscmp()
533 int set_cred_ucounts(struct cred *new)  in set_cred_ucounts()
559 	cred_jar = KMEM_CACHE(cred,  in cred_init()
579 struct cred *prepare_kernel_cred(struct task_struct *daemon)  in prepare_kernel_cred()
581 	const struct cred *old;  in prepare_kernel_cred()
582 	struct cred *new;  in prepare_kernel_cred()
638 int set_security_override(struct cred *new, u32 secid)  in set_security_override()
654 int set_security_override_from_ctx(struct cred *new, const char *secctx)  in set_security_override_from_ctx()
676 int set_create_files_as(struct cred *new, struct inode *inode)  in set_create_files_as()