From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B886FC3A5A0 for ; Mon, 19 Aug 2019 15:45:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9543F22CE3 for ; Mon, 19 Aug 2019 15:45:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727919AbfHSPpr (ORCPT ); Mon, 19 Aug 2019 11:45:47 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:47585 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727821AbfHSPpk (ORCPT ); Mon, 19 Aug 2019 11:45:40 -0400 Received: from localhost ([127.0.0.1] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1hzjql-0006uS-GM; Mon, 19 Aug 2019 17:45:39 +0200 Message-Id: <20190819143802.331782851@linutronix.de> User-Agent: quilt/0.65 Date: Mon, 19 Aug 2019 16:31:51 +0200 From: Thomas Gleixner To: LKML Cc: Oleg Nesterov , Ingo Molnar , Peter Zijlstra , John Stultz , Frederic Weisbecker , Anna-Maria Behnsen Subject: [patch 10/44] posix-cpu-timers: Use common permission check in posix_cpu_timer_create() References: <20190819143141.221906747@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yet another copy of the same thing gone... Signed-off-by: Thomas Gleixner --- kernel/time/posix-cpu-timers.c | 35 +++-------------------------------- 1 file changed, 3 insertions(+), 32 deletions(-) --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -316,44 +316,15 @@ static int posix_cpu_clock_get(const clo */ static int posix_cpu_timer_create(struct k_itimer *new_timer) { - int ret = 0; - const pid_t pid = CPUCLOCK_PID(new_timer->it_clock); - struct task_struct *p; + struct task_struct *p = get_task_for_clock(new_timer->it_clock); - if (CPUCLOCK_WHICH(new_timer->it_clock) >= CPUCLOCK_MAX) + if (!p) return -EINVAL; new_timer->kclock = &clock_posix_cpu; - INIT_LIST_HEAD(&new_timer->it.cpu.entry); - - rcu_read_lock(); - if (CPUCLOCK_PERTHREAD(new_timer->it_clock)) { - if (pid == 0) { - p = current; - } else { - p = find_task_by_vpid(pid); - if (p && !same_thread_group(p, current)) - p = NULL; - } - } else { - if (pid == 0) { - p = current->group_leader; - } else { - p = find_task_by_vpid(pid); - if (p && !has_group_leader_pid(p)) - p = NULL; - } - } new_timer->it.cpu.task = p; - if (p) { - get_task_struct(p); - } else { - ret = -EINVAL; - } - rcu_read_unlock(); - - return ret; + return 0; } /*