200 	struct cred *new;  in cred_alloc_blank()  local
202 	new = kmem_cache_zalloc(cred_jar, GFP_KERNEL);  in cred_alloc_blank()
203 	if (!new)  in cred_alloc_blank()
206 	atomic_set(&new->usage, 1);  in cred_alloc_blank()
208 	new->magic = CRED_MAGIC;  in cred_alloc_blank()
211 	if (security_cred_alloc_blank(new, GFP_KERNEL) < 0)  in cred_alloc_blank()
214 	return new;  in cred_alloc_blank()
217 	abort_creds(new);  in cred_alloc_blank()
239 	struct cred *new;  in prepare_creds()  local
243 	new = kmem_cache_alloc(cred_jar, GFP_KERNEL);  in prepare_creds()
244 	if (!new)  in prepare_creds()
247 	kdebug("prepare_creds() alloc %p", new);  in prepare_creds()
250 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
252 	atomic_set(&new->usage, 1);  in prepare_creds()
253 	set_cred_subscribers(new, 0);  in prepare_creds()
254 	get_group_info(new->group_info);  in prepare_creds()
255 	get_uid(new->user);  in prepare_creds()
256 	get_user_ns(new->user_ns);  in prepare_creds()
259 	key_get(new->session_keyring);  in prepare_creds()
260 	key_get(new->process_keyring);  in prepare_creds()
261 	key_get(new->thread_keyring);  in prepare_creds()
262 	key_get(new->request_key_auth);  in prepare_creds()
266 	new->security = NULL;  in prepare_creds()
269 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_creds()
271 	validate_creds(new);  in prepare_creds()
272 	return new;  in prepare_creds()
275 	abort_creds(new);  in prepare_creds()
286 	struct cred *new;  in prepare_exec_creds()  local
288 	new = prepare_creds();  in prepare_exec_creds()
289 	if (!new)  in prepare_exec_creds()
290 		return new;  in prepare_exec_creds()
294 	key_put(new->thread_keyring);  in prepare_exec_creds()
295 	new->thread_keyring = NULL;  in prepare_exec_creds()
298 	key_put(new->process_keyring);  in prepare_exec_creds()
299 	new->process_keyring = NULL;  in prepare_exec_creds()
302 	return new;  in prepare_exec_creds()
316 	struct cred *new;  in copy_creds()  local
335 	new = prepare_creds();  in copy_creds()
336 	if (!new)  in copy_creds()
340 		ret = create_user_ns(new);  in copy_creds()
348 	if (new->thread_keyring) {  in copy_creds()
349 		key_put(new->thread_keyring);  in copy_creds()
350 		new->thread_keyring = NULL;  in copy_creds()
352 			install_thread_keyring_to_cred(new);  in copy_creds()
359 		key_put(new->process_keyring);  in copy_creds()
360 		new->process_keyring = NULL;  in copy_creds()
364 	atomic_inc(&new->user->processes);  in copy_creds()
365 	p->cred = p->real_cred = get_cred(new);  in copy_creds()
366 	alter_cred_subscribers(new, 2);  in copy_creds()
367 	validate_creds(new);  in copy_creds()
371 	put_cred(new);  in copy_creds()
414 int commit_creds(struct cred *new)  in commit_creds()  argument
419 	kdebug("commit_creds(%p{%d,%d})", new,  in commit_creds()
420 	       atomic_read(&new->usage),  in commit_creds()
421 	       read_cred_subscribers(new));  in commit_creds()
427 	validate_creds(new);  in commit_creds()
429 	BUG_ON(atomic_read(&new->usage) < 1);  in commit_creds()
431 	get_cred(new); /* we will require a ref for the subj creds too */  in commit_creds()
434 	if (!uid_eq(old->euid, new->euid) ||  in commit_creds()
435 	    !gid_eq(old->egid, new->egid) ||  in commit_creds()
436 	    !uid_eq(old->fsuid, new->fsuid) ||  in commit_creds()
437 	    !gid_eq(old->fsgid, new->fsgid) ||  in commit_creds()
438 	    !cred_cap_issubset(old, new)) {  in commit_creds()
446 	if (!uid_eq(new->fsuid, old->fsuid))  in commit_creds()
448 	if (!gid_eq(new->fsgid, old->fsgid))  in commit_creds()
455 	alter_cred_subscribers(new, 2);  in commit_creds()
456 	if (new->user != old->user)  in commit_creds()
457 		atomic_inc(&new->user->processes);  in commit_creds()
458 	rcu_assign_pointer(task->real_cred, new);  in commit_creds()
459 	rcu_assign_pointer(task->cred, new);  in commit_creds()
460 	if (new->user != old->user)  in commit_creds()
465 	if (!uid_eq(new->uid,   old->uid)  ||  in commit_creds()
466 	    !uid_eq(new->euid,  old->euid) ||  in commit_creds()
467 	    !uid_eq(new->suid,  old->suid) ||  in commit_creds()
468 	    !uid_eq(new->fsuid, old->fsuid))  in commit_creds()
471 	if (!gid_eq(new->gid,   old->gid)  ||  in commit_creds()
472 	    !gid_eq(new->egid,  old->egid) ||  in commit_creds()
473 	    !gid_eq(new->sgid,  old->sgid) ||  in commit_creds()
474 	    !gid_eq(new->fsgid, old->fsgid))  in commit_creds()
491 void abort_creds(struct cred *new)  in abort_creds()  argument
493 	kdebug("abort_creds(%p{%d,%d})", new,  in abort_creds()
494 	       atomic_read(&new->usage),  in abort_creds()
495 	       read_cred_subscribers(new));  in abort_creds()
498 	BUG_ON(read_cred_subscribers(new) != 0);  in abort_creds()
500 	BUG_ON(atomic_read(&new->usage) < 1);  in abort_creds()
501 	put_cred(new);  in abort_creds()
512 const struct cred *override_creds(const struct cred *new)  in override_creds()  argument
516 	kdebug("override_creds(%p{%d,%d})", new,  in override_creds()
517 	       atomic_read(&new->usage),  in override_creds()
518 	       read_cred_subscribers(new));  in override_creds()
521 	validate_creds(new);  in override_creds()
522 	get_cred(new);  in override_creds()
523 	alter_cred_subscribers(new, 1);  in override_creds()
524 	rcu_assign_pointer(current->cred, new);  in override_creds()
589 	struct cred *new;  in prepare_kernel_cred()  local
591 	new = kmem_cache_alloc(cred_jar, GFP_KERNEL);  in prepare_kernel_cred()
592 	if (!new)  in prepare_kernel_cred()
595 	kdebug("prepare_kernel_cred() alloc %p", new);  in prepare_kernel_cred()
604 	*new = *old;  in prepare_kernel_cred()
605 	atomic_set(&new->usage, 1);  in prepare_kernel_cred()
606 	set_cred_subscribers(new, 0);  in prepare_kernel_cred()
607 	get_uid(new->user);  in prepare_kernel_cred()
608 	get_user_ns(new->user_ns);  in prepare_kernel_cred()
609 	get_group_info(new->group_info);  in prepare_kernel_cred()
612 	new->session_keyring = NULL;  in prepare_kernel_cred()
613 	new->process_keyring = NULL;  in prepare_kernel_cred()
614 	new->thread_keyring = NULL;  in prepare_kernel_cred()
615 	new->request_key_auth = NULL;  in prepare_kernel_cred()
616 	new->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;  in prepare_kernel_cred()
620 	new->security = NULL;  in prepare_kernel_cred()
622 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_kernel_cred()
626 	validate_creds(new);  in prepare_kernel_cred()
627 	return new;  in prepare_kernel_cred()
630 	put_cred(new);  in prepare_kernel_cred()
644 int set_security_override(struct cred *new, u32 secid)  in set_security_override()  argument
646 	return security_kernel_act_as(new, secid);  in set_security_override()
660 int set_security_override_from_ctx(struct cred *new, const char *secctx)  in set_security_override_from_ctx()  argument
669 	return set_security_override(new, secid);  in set_security_override_from_ctx()
682 int set_create_files_as(struct cred *new, struct inode *inode)  in set_create_files_as()  argument
684 	new->fsuid = inode->i_uid;  in set_create_files_as()
685 	new->fsgid = inode->i_gid;  in set_create_files_as()
686 	return security_kernel_create_files_as(new, inode);  in set_create_files_as()