253 	const struct cred *old;  in prepare_creds()  local
264 	old = task->cred;  in prepare_creds()
265 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
285 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_creds()
437 	const struct cred *old = task->real_cred;  in commit_creds()  local
443 	BUG_ON(task->cred != old);  in commit_creds()
445 	BUG_ON(read_cred_subscribers(old) < 2);  in commit_creds()
446 	validate_creds(old);  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()
477 	if (!gid_eq(new->fsgid, old->fsgid))  in commit_creds()
485 	if (new->user != old->user)  in commit_creds()
489 	if (new->user != old->user)  in commit_creds()
490 		atomic_dec(&old->user->processes);  in commit_creds()
491 	alter_cred_subscribers(old, -2);  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()
507 	put_cred(old);  in commit_creds()
508 	put_cred(old);  in commit_creds()
543 	const struct cred *old = current->cred;  in override_creds()  local
549 	validate_creds(old);  in override_creds()
566 	alter_cred_subscribers(old, -1);  in override_creds()
568 	kdebug("override_creds() = %p{%d,%d}", old,  in override_creds()
569 	       atomic_read(&old->usage),  in override_creds()
570 	       read_cred_subscribers(old));  in override_creds()
571 	return old;  in override_creds()
582 void revert_creds(const struct cred *old)  in revert_creds()  argument
586 	kdebug("revert_creds(%p{%d,%d})", old,  in revert_creds()
587 	       atomic_read(&old->usage),  in revert_creds()
588 	       read_cred_subscribers(old));  in revert_creds()
590 	validate_creds(old);  in revert_creds()
592 	alter_cred_subscribers(old, 1);  in revert_creds()
593 	rcu_assign_pointer(current->cred, old);  in revert_creds()
683 	const struct cred *old;  in prepare_kernel_cred()  local
693 		old = get_task_cred(daemon);  in prepare_kernel_cred()
695 		old = get_cred(&init_cred);  in prepare_kernel_cred()
697 	validate_creds(old);  in prepare_kernel_cred()
699 	*new = *old;  in prepare_kernel_cred()
718 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_kernel_cred()
721 	put_cred(old);  in prepare_kernel_cred()
727 	put_cred(old);  in prepare_kernel_cred()