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=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 C99E1C43142 for ; Thu, 28 Jun 2018 03:16:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8CB1525DF1 for ; Thu, 28 Jun 2018 03:16:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8CB1525DF1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933035AbeF1DQK (ORCPT ); Wed, 27 Jun 2018 23:16:10 -0400 Received: from mx2.suse.de ([195.135.220.15]:58637 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932577AbeF1DQJ (ORCPT ); Wed, 27 Jun 2018 23:16:09 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext-too.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 6488BACC6; Thu, 28 Jun 2018 03:16:07 +0000 (UTC) Date: Thu, 28 Jun 2018 05:16:06 +0200 From: "Luis R. Rodriguez" To: Waiman Long Cc: "Luis R. Rodriguez" , Kees Cook , Andrew Morton , Jonathan Corbet , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, Al Viro , Matthew Wilcox , "Eric W. Biederman" , Takashi Iwai , Davidlohr Bueso Subject: Re: [PATCH v8 1/5] ipc: IPCMNI limit check for msgmni and shmmni Message-ID: <20180628031605.GJ21242@wotan.suse.de> References: <1529317698-16575-1-git-send-email-longman@redhat.com> <1529317698-16575-2-git-send-email-longman@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1529317698-16575-2-git-send-email-longman@redhat.com> User-Agent: Mutt/1.6.0 (2016-04-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 18, 2018 at 06:28:14PM +0800, Waiman Long wrote: > A user can write arbitrary integer values to msgmni and shmmni sysctl > parameters without getting error, but the actual limit is really > IPCMNI (32k). This can mislead users as they think they can get a > value that is not real. > > The right limits are now set for msgmni and shmmni so that the users > will become aware if they set a value outside of the acceptable range. > > Signed-off-by: Waiman Long Acked-by: Luis R. Rodriguez Luis