241 	const struct cred *old;  in prepare_creds()  local
252 	old = task->cred;  in prepare_creds()
253 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
272 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_creds()
420 	const struct cred *old = task->real_cred;  in commit_creds()  local
426 	BUG_ON(task->cred != old);  in commit_creds()
428 	BUG_ON(read_cred_subscribers(old) < 2);  in commit_creds()
429 	validate_creds(old);  in commit_creds()
437 	if (!uid_eq(old->euid, new->euid) ||  in commit_creds()
438 	    !gid_eq(old->egid, new->egid) ||  in commit_creds()
439 	    !uid_eq(old->fsuid, new->fsuid) ||  in commit_creds()
440 	    !gid_eq(old->fsgid, new->fsgid) ||  in commit_creds()
441 	    !cred_cap_issubset(old, new)) {  in commit_creds()
449 	if (!uid_eq(new->fsuid, old->fsuid))  in commit_creds()
451 	if (!gid_eq(new->fsgid, old->fsgid))  in commit_creds()
459 	if (new->user != old->user)  in commit_creds()
463 	if (new->user != old->user)  in commit_creds()
464 		atomic_dec(&old->user->processes);  in commit_creds()
465 	alter_cred_subscribers(old, -2);  in commit_creds()
468 	if (!uid_eq(new->uid,   old->uid)  ||  in commit_creds()
469 	    !uid_eq(new->euid,  old->euid) ||  in commit_creds()
470 	    !uid_eq(new->suid,  old->suid) ||  in commit_creds()
471 	    !uid_eq(new->fsuid, old->fsuid))  in commit_creds()
474 	if (!gid_eq(new->gid,   old->gid)  ||  in commit_creds()
475 	    !gid_eq(new->egid,  old->egid) ||  in commit_creds()
476 	    !gid_eq(new->sgid,  old->sgid) ||  in commit_creds()
477 	    !gid_eq(new->fsgid, old->fsgid))  in commit_creds()
481 	put_cred(old);  in commit_creds()
482 	put_cred(old);  in commit_creds()
517 	const struct cred *old = current->cred;  in override_creds()  local
523 	validate_creds(old);  in override_creds()
528 	alter_cred_subscribers(old, -1);  in override_creds()
530 	kdebug("override_creds() = %p{%d,%d}", old,  in override_creds()
531 	       atomic_read(&old->usage),  in override_creds()
532 	       read_cred_subscribers(old));  in override_creds()
533 	return old;  in override_creds()
544 void revert_creds(const struct cred *old)  in revert_creds()  argument
548 	kdebug("revert_creds(%p{%d,%d})", old,  in revert_creds()
549 	       atomic_read(&old->usage),  in revert_creds()
550 	       read_cred_subscribers(old));  in revert_creds()
552 	validate_creds(old);  in revert_creds()
554 	alter_cred_subscribers(old, 1);  in revert_creds()
555 	rcu_assign_pointer(current->cred, old);  in revert_creds()
591 	const struct cred *old;  in prepare_kernel_cred()  local
601 		old = get_task_cred(daemon);  in prepare_kernel_cred()
603 		old = get_cred(&init_cred);  in prepare_kernel_cred()
605 	validate_creds(old);  in prepare_kernel_cred()
607 	*new = *old;  in prepare_kernel_cred()
625 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_kernel_cred()
628 	put_cred(old);  in prepare_kernel_cred()
634 	put_cred(old);  in prepare_kernel_cred()