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=-6.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 53909C4338F for ; Fri, 30 Jul 2021 06:36:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3091061008 for ; Fri, 30 Jul 2021 06:36:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237290AbhG3Ggh (ORCPT ); Fri, 30 Jul 2021 02:36:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:59726 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237264AbhG3Ggg (ORCPT ); Fri, 30 Jul 2021 02:36:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2633960C51; Fri, 30 Jul 2021 06:36:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1627626991; bh=71oqT/5ucbos6VX6PyOidy5RBpZ5UKU5uHQeAmOmqN0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=HcdhTgxw0BTFl+GNBgzMbo53P9/IcafNAzvM5z5791lOf3JL2lcDL3mXOF2Fp2uQ8 o/tribO0PieNpMZbzk60NjBdlsOwiQTcj5FTBM+WiMSK/1qeP960jOlIMPz/RP/PvV 4VZRgMFg7WezsEsftUH/R955GGXtZKEVTulQOSgA= Date: Fri, 30 Jul 2021 08:36:29 +0200 From: Greg KH To: Nobuhiro Iwamatsu Cc: stable@vger.kernel.org, sashal@kernel.org Subject: Re: [RFC/PATCH 0/2] Backports CVE-2021-21781 for 4.4 and 4.9 Message-ID: References: <20210730060805.342577-1-nobuhiro1.iwamatsu@toshiba.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210730060805.342577-1-nobuhiro1.iwamatsu@toshiba.co.jp> Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Fri, Jul 30, 2021 at 03:08:03PM +0900, Nobuhiro Iwamatsu wrote: > Hi, > > This is a patch series to CVE-2021-21781. > The patch 9c698bff66ab ("RM: ensure the signal page contains defined > contents") depepds on memset32. However, this function is not provided > in 4.4 and 4.9. Therefore, we need the patch 3b3c4babd898 ("lib/string.c: > add multibyte memset functions") to apply this feature. > Another option is to implement only the memset32 function in > arch/arm/kernel/signal.c only or using loop memset, but for simplicity > we have taken the way of applying the original patch 3b3c4babd898 > ("lib/string.c: add multibyte memset functions") that provides memset32 > in mainline kernel. All now queued up, thanks. greg k-h