215 	struct cred *new;  in cred_alloc_blank()  local
217 	new = kmem_cache_zalloc(cred_jar, GFP_KERNEL);  in cred_alloc_blank()
218 	if (!new)  in cred_alloc_blank()
221 	atomic_set(&new->usage, 1);  in cred_alloc_blank()
223 	new->magic = CRED_MAGIC;  in cred_alloc_blank()
226 	if (security_cred_alloc_blank(new, GFP_KERNEL_ACCOUNT) < 0)  in cred_alloc_blank()
229 	return new;  in cred_alloc_blank()
232 	abort_creds(new);  in cred_alloc_blank()
254 	struct cred *new;  in prepare_creds()  local
258 	new = kmem_cache_alloc(cred_jar, GFP_KERNEL);  in prepare_creds()
259 	if (!new)  in prepare_creds()
262 	kdebug("prepare_creds() alloc %p", new);  in prepare_creds()
265 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
267 	new->non_rcu = 0;  in prepare_creds()
268 	atomic_set(&new->usage, 1);  in prepare_creds()
269 	set_cred_subscribers(new, 0);  in prepare_creds()
270 	get_group_info(new->group_info);  in prepare_creds()
271 	get_uid(new->user);  in prepare_creds()
272 	get_user_ns(new->user_ns);  in prepare_creds()
275 	key_get(new->session_keyring);  in prepare_creds()
276 	key_get(new->process_keyring);  in prepare_creds()
277 	key_get(new->thread_keyring);  in prepare_creds()
278 	key_get(new->request_key_auth);  in prepare_creds()
282 	new->security = NULL;  in prepare_creds()
285 	if (security_prepare_creds(new, old, GFP_KERNEL_ACCOUNT) < 0)  in prepare_creds()
287 	validate_creds(new);  in prepare_creds()
288 	return new;  in prepare_creds()
291 	abort_creds(new);  in prepare_creds()
302 	struct cred *new;  in prepare_exec_creds()  local
304 	new = prepare_creds();  in prepare_exec_creds()
305 	if (!new)  in prepare_exec_creds()
306 		return new;  in prepare_exec_creds()
310 	key_put(new->thread_keyring);  in prepare_exec_creds()
311 	new->thread_keyring = NULL;  in prepare_exec_creds()
314 	key_put(new->process_keyring);  in prepare_exec_creds()
315 	new->process_keyring = NULL;  in prepare_exec_creds()
318 	return new;  in prepare_exec_creds()
332 	struct cred *new;  in copy_creds()  local
355 	new = prepare_creds();  in copy_creds()
356 	if (!new)  in copy_creds()
360 		ret = create_user_ns(new);  in copy_creds()
368 	if (new->thread_keyring) {  in copy_creds()
369 		key_put(new->thread_keyring);  in copy_creds()
370 		new->thread_keyring = NULL;  in copy_creds()
372 			install_thread_keyring_to_cred(new);  in copy_creds()
379 		key_put(new->process_keyring);  in copy_creds()
380 		new->process_keyring = NULL;  in copy_creds()
384 	atomic_inc(&new->user->processes);  in copy_creds()
385 	p->cred = p->real_cred = get_cred(new);  in copy_creds()
386 	alter_cred_subscribers(new, 2);  in copy_creds()
387 	validate_creds(new);  in copy_creds()
391 	put_cred(new);  in copy_creds()
434 int commit_creds(struct cred *new)  in commit_creds()  argument
439 	kdebug("commit_creds(%p{%d,%d})", new,  in commit_creds()
440 	       atomic_read(&new->usage),  in commit_creds()
441 	       read_cred_subscribers(new));  in commit_creds()
447 	validate_creds(new);  in commit_creds()
449 	BUG_ON(atomic_read(&new->usage) < 1);  in commit_creds()
451 	get_cred(new); /* we will require a ref for the subj creds too */  in commit_creds()
454 	if (!uid_eq(old->euid, new->euid) ||  in commit_creds()
455 	    !gid_eq(old->egid, new->egid) ||  in commit_creds()
456 	    !uid_eq(old->fsuid, new->fsuid) ||  in commit_creds()
457 	    !gid_eq(old->fsgid, new->fsgid) ||  in commit_creds()
458 	    !cred_cap_issubset(old, new)) {  in commit_creds()
475 	if (!uid_eq(new->fsuid, old->fsuid))  in commit_creds()
476 		key_fsuid_changed(new);  in commit_creds()
477 	if (!gid_eq(new->fsgid, old->fsgid))  in commit_creds()
478 		key_fsgid_changed(new);  in commit_creds()
484 	alter_cred_subscribers(new, 2);  in commit_creds()
485 	if (new->user != old->user)  in commit_creds()
486 		atomic_inc(&new->user->processes);  in commit_creds()
487 	rcu_assign_pointer(task->real_cred, new);  in commit_creds()
488 	rcu_assign_pointer(task->cred, new);  in commit_creds()
489 	if (new->user != old->user)  in commit_creds()
494 	if (!uid_eq(new->uid,   old->uid)  ||  in commit_creds()
495 	    !uid_eq(new->euid,  old->euid) ||  in commit_creds()
496 	    !uid_eq(new->suid,  old->suid) ||  in commit_creds()
497 	    !uid_eq(new->fsuid, old->fsuid))  in commit_creds()
500 	if (!gid_eq(new->gid,   old->gid)  ||  in commit_creds()
501 	    !gid_eq(new->egid,  old->egid) ||  in commit_creds()
502 	    !gid_eq(new->sgid,  old->sgid) ||  in commit_creds()
503 	    !gid_eq(new->fsgid, old->fsgid))  in commit_creds()
520 void abort_creds(struct cred *new)  in abort_creds()  argument
522 	kdebug("abort_creds(%p{%d,%d})", new,  in abort_creds()
523 	       atomic_read(&new->usage),  in abort_creds()
524 	       read_cred_subscribers(new));  in abort_creds()
527 	BUG_ON(read_cred_subscribers(new) != 0);  in abort_creds()
529 	BUG_ON(atomic_read(&new->usage) < 1);  in abort_creds()
530 	put_cred(new);  in abort_creds()
541 const struct cred *override_creds(const struct cred *new)  in override_creds()  argument
545 	kdebug("override_creds(%p{%d,%d})", new,  in override_creds()
546 	       atomic_read(&new->usage),  in override_creds()
547 	       read_cred_subscribers(new));  in override_creds()
550 	validate_creds(new);  in override_creds()
563 	get_new_cred((struct cred *)new);  in override_creds()
564 	alter_cred_subscribers(new, 1);  in override_creds()
565 	rcu_assign_pointer(current->cred, new);  in override_creds()
684 	struct cred *new;  in prepare_kernel_cred()  local
686 	new = kmem_cache_alloc(cred_jar, GFP_KERNEL);  in prepare_kernel_cred()
687 	if (!new)  in prepare_kernel_cred()
690 	kdebug("prepare_kernel_cred() alloc %p", new);  in prepare_kernel_cred()
699 	*new = *old;  in prepare_kernel_cred()
700 	new->non_rcu = 0;  in prepare_kernel_cred()
701 	atomic_set(&new->usage, 1);  in prepare_kernel_cred()
702 	set_cred_subscribers(new, 0);  in prepare_kernel_cred()
703 	get_uid(new->user);  in prepare_kernel_cred()
704 	get_user_ns(new->user_ns);  in prepare_kernel_cred()
705 	get_group_info(new->group_info);  in prepare_kernel_cred()
708 	new->session_keyring = NULL;  in prepare_kernel_cred()
709 	new->process_keyring = NULL;  in prepare_kernel_cred()
710 	new->thread_keyring = NULL;  in prepare_kernel_cred()
711 	new->request_key_auth = NULL;  in prepare_kernel_cred()
712 	new->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;  in prepare_kernel_cred()
716 	new->security = NULL;  in prepare_kernel_cred()
718 	if (security_prepare_creds(new, old, GFP_KERNEL_ACCOUNT) < 0)  in prepare_kernel_cred()
722 	validate_creds(new);  in prepare_kernel_cred()
723 	return new;  in prepare_kernel_cred()
726 	put_cred(new);  in prepare_kernel_cred()
740 int set_security_override(struct cred *new, u32 secid)  in set_security_override()  argument
742 	return security_kernel_act_as(new, secid);  in set_security_override()
756 int set_security_override_from_ctx(struct cred *new, const char *secctx)  in set_security_override_from_ctx()  argument
765 	return set_security_override(new, secid);  in set_security_override_from_ctx()
778 int set_create_files_as(struct cred *new, struct inode *inode)  in set_create_files_as()  argument
782 	new->fsuid = inode->i_uid;  in set_create_files_as()
783 	new->fsgid = inode->i_gid;  in set_create_files_as()
784 	return security_kernel_create_files_as(new, inode);  in set_create_files_as()