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=-9.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 1DFFAC43461 for ; Tue, 15 Sep 2020 16:41:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0096206B5 for ; Tue, 15 Sep 2020 16:41:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600188092; bh=vqR4U0RypZZqGNmeSsxP9GZCUvkd+GiLcAa+DRNFwpg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=uxPdONDGXkyov7o3B2PY/aX+eGG+lHTFDIQUfn0ZPVNSEb/2pwQTQjti004OxKhXw JUJgX2rKVE6FYhikptN7Ta+bWvjjvePMPiTFX0RG3NcT66jEAcXHSewZegVHAKnlyj EDML3bLq2jb5FIE/wicLl1G2f7FAVZupiZ7iF1GA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727638AbgIOQl3 (ORCPT ); Tue, 15 Sep 2020 12:41:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:39402 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727653AbgIOQkz (ORCPT ); Tue, 15 Sep 2020 12:40:55 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B50FD206B5; Tue, 15 Sep 2020 16:40:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600188055; bh=vqR4U0RypZZqGNmeSsxP9GZCUvkd+GiLcAa+DRNFwpg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=wakehxfzswARAok6VxyUXnFEy829A5oxb0LSLAw7CFEuYB7cIK6ckMIzhJ7N7iZXh rE1XO0urSANx8iVcXid7IYG57GUOF6VehS8T+GlwpE1dDHd8LBe/Pu07dYa3LVQTwu Ks4K6LQc1PnzVGAwpJwkXlenqGAYqyIomPWv3+Bc= Date: Tue, 15 Sep 2020 18:41:31 +0200 From: Greg Kroah-Hartman To: Jordan Crouse Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Rob Clark , Sasha Levin Subject: Re: [PATCH 5.4 131/132] drm/msm: Enable expanded apriv support for a650 Message-ID: <20200915164131.GB43543@kroah.com> References: <20200915140644.037604909@linuxfoundation.org> <20200915140650.665454992@linuxfoundation.org> <20200915160319.GB22371@jcrouse1-lnx.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200915160319.GB22371@jcrouse1-lnx.qualcomm.com> Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Sep 15, 2020 at 10:03:19AM -0600, Jordan Crouse wrote: > On Tue, Sep 15, 2020 at 04:13:53PM +0200, Greg Kroah-Hartman wrote: > > From: Jordan Crouse > > > > [ Upstream commit 604234f33658cdd72f686be405a99646b397d0b3 ] > > > > a650 supports expanded apriv support that allows us to map critical buffers > > (ringbuffer and memstore) as as privileged to protect them from corruption. > > > > Cc: stable@vger.kernel.org > > Signed-off-by: Jordan Crouse > > Signed-off-by: Rob Clark > > Signed-off-by: Sasha Levin > > Hi. A bug was reported in this patch with a fix just posted to the list [1]. > Since the RPTR shadow is being disabled universally by f6828e0c4045 ("drm/msm: > Disable the RPTR shadow") that will address the security concern and we won't > need the extra protection from this patch. I suggest that you drop it for the > stable trees and we can merge the fix into 5.9 to re-enable APRIV for newer > kernels. Ok, thanks, now dropped from 5.8.y and 5.4.y trees. greg k-h