From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4197qR1355zF0jD for ; Tue, 19 Jun 2018 23:20:02 +1000 (AEST) Subject: Re: [PATCH v2 6/6] powerpc/pkeys: Deny read/write/execute by default To: Michael Ellerman , Ram Pai Cc: linuxppc-dev@lists.ozlabs.org, dave.hansen@intel.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, hbabu@us.ibm.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, Ulrich.Weigand@de.ibm.com, luto@kernel.org, msuchanek@suse.de References: <1528936144-6696-1-git-send-email-linuxram@us.ibm.com> <1528936144-6696-7-git-send-email-linuxram@us.ibm.com> <87602fx84g.fsf@concordia.ellerman.id.au> From: Florian Weimer Message-ID: Date: Tue, 19 Jun 2018 15:19:56 +0200 MIME-Version: 1.0 In-Reply-To: <87602fx84g.fsf@concordia.ellerman.id.au> Content-Type: text/plain; charset=utf-8; format=flowed List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 06/19/2018 02:39 PM, Michael Ellerman wrote: > Ram Pai writes: >> Deny all permissions on all keys, with some exceptions. pkey-0 must >> allow all permissions, or else everything comes to a screaching halt. >> Execute-only key must allow execute permission. > > Another ABI change. > > Are we calling this a bug fix? Yes. Note that the default is configurable on x86 (default is deny), so it's not really an ABI change as such IMHO. Thanks, Florian