246 	const struct cred *old;  in prepare_creds()  local
257 	old = task->cred;  in prepare_creds()
258 	memcpy(new, old, sizeof(struct cred));  in prepare_creds()
277 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_creds()
425 	const struct cred *old = task->real_cred;  in commit_creds()  local
431 	BUG_ON(task->cred != old);  in commit_creds()
433 	BUG_ON(read_cred_subscribers(old) < 2);  in commit_creds()
434 	validate_creds(old);  in commit_creds()
442 	if (!uid_eq(old->euid, new->euid) ||  in commit_creds()
443 	    !gid_eq(old->egid, new->egid) ||  in commit_creds()
444 	    !uid_eq(old->fsuid, new->fsuid) ||  in commit_creds()
445 	    !gid_eq(old->fsgid, new->fsgid) ||  in commit_creds()
446 	    !cred_cap_issubset(old, new)) {  in commit_creds()
454 	if (!uid_eq(new->fsuid, old->fsuid))  in commit_creds()
456 	if (!gid_eq(new->fsgid, old->fsgid))  in commit_creds()
464 	if (new->user != old->user)  in commit_creds()
468 	if (new->user != old->user)  in commit_creds()
469 		atomic_dec(&old->user->processes);  in commit_creds()
470 	alter_cred_subscribers(old, -2);  in commit_creds()
473 	if (!uid_eq(new->uid,   old->uid)  ||  in commit_creds()
474 	    !uid_eq(new->euid,  old->euid) ||  in commit_creds()
475 	    !uid_eq(new->suid,  old->suid) ||  in commit_creds()
476 	    !uid_eq(new->fsuid, old->fsuid))  in commit_creds()
479 	if (!gid_eq(new->gid,   old->gid)  ||  in commit_creds()
480 	    !gid_eq(new->egid,  old->egid) ||  in commit_creds()
481 	    !gid_eq(new->sgid,  old->sgid) ||  in commit_creds()
482 	    !gid_eq(new->fsgid, old->fsgid))  in commit_creds()
486 	put_cred(old);  in commit_creds()
487 	put_cred(old);  in commit_creds()
522 	const struct cred *old = current->cred;  in override_creds()  local
528 	validate_creds(old);  in override_creds()
533 	alter_cred_subscribers(old, -1);  in override_creds()
535 	kdebug("override_creds() = %p{%d,%d}", old,  in override_creds()
536 	       atomic_read(&old->usage),  in override_creds()
537 	       read_cred_subscribers(old));  in override_creds()
538 	return old;  in override_creds()
549 void revert_creds(const struct cred *old)  in revert_creds()  argument
553 	kdebug("revert_creds(%p{%d,%d})", old,  in revert_creds()
554 	       atomic_read(&old->usage),  in revert_creds()
555 	       read_cred_subscribers(old));  in revert_creds()
557 	validate_creds(old);  in revert_creds()
559 	alter_cred_subscribers(old, 1);  in revert_creds()
560 	rcu_assign_pointer(current->cred, old);  in revert_creds()
596 	const struct cred *old;  in prepare_kernel_cred()  local
606 		old = get_task_cred(daemon);  in prepare_kernel_cred()
608 		old = get_cred(&init_cred);  in prepare_kernel_cred()
610 	validate_creds(old);  in prepare_kernel_cred()
612 	*new = *old;  in prepare_kernel_cred()
630 	if (security_prepare_creds(new, old, GFP_KERNEL) < 0)  in prepare_kernel_cred()
633 	put_cred(old);  in prepare_kernel_cred()
639 	put_cred(old);  in prepare_kernel_cred()