Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp2022974ybt; Sun, 21 Jun 2020 06:58:43 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyIdS+o45+pdBFmXy3t0yKthsz8tUkNM0g3bTMoLDApFHkwF440UmSUXkZQb9Uw7VZIw1mt X-Received: by 2002:a17:906:2a94:: with SMTP id l20mr11557318eje.224.1592747923737; Sun, 21 Jun 2020 06:58:43 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1592747923; cv=none; d=google.com; s=arc-20160816; b=SCEixKcHkocyoepqLLo8CVN3HE5lWhmHQXPzmL0fjKsyiZ2xPIGDbuqD+0HN4+OxIH 491zuBO7g4XEYGJEhHy7DWDsZPDyoaN+awXWA7AhcuDrmGO6W9mYS651dJku+IZzFK0e CADIFpoLaWwURFGqEdBD5OIEEkiCgPIfRYnPvLKmw7WBEBnSVS4fppuZC+jxQA2X8IX4 fr6lZrhoj4+r9hRGO2in0eqfMRS+FW1XqAwYmcFhVd/BGmp2pZ/Ud2h4fJNrllkGrtXt apDWPhDUWS1V9rOtpRdXTgB3zVdjY4Nz/b2wpdJ5VsqvKuGunC9M53NVp7/7pX3JsEvn lVmg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=JpTdBMb5CcmKdOPdd4pRFoUlnRfPKkoaHBiLFXZemac=; b=Pvx0fCypJCAa/HSAIW4sq4eiUQRp75p4iI5noAhLQjd2FcI2Q7brdYNNUJ8Q5eAS4E Pr53XcTFHphPuMESldhRmislJpMStzYKcvlv58PB59LlX6V9i+g1kQDF7cMdyzMR1KaC DtffPIY6P589JGyG3QwJTsGT0SibKBFlTr4yLirVVdgvo3NCg0ubiIHQoMQIAnVbTCoH +7/uhub2tdYOgb4wiFc0GeyEt3DDxTAzhwCUvctK2waJy0LDBU2bimy56C/zkzaWFJJZ E5V4RMKE3VOkQEh9p5jhB+a8EZAh7Wzc5RIPW+VIaRxlEnvg10YF7U6IQ9tmD2uwRWeQ +OoQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id h3si8591832ejo.141.2020.06.21.06.58.20; Sun, 21 Jun 2020 06:58:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730129AbgFUN4k (ORCPT + 99 others); Sun, 21 Jun 2020 09:56:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729649AbgFUN4j (ORCPT ); Sun, 21 Jun 2020 09:56:39 -0400 Received: from nautica.notk.org (ipv6.notk.org [IPv6:2001:41d0:1:7a93::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B0EFC061794; Sun, 21 Jun 2020 06:56:39 -0700 (PDT) Received: by nautica.notk.org (Postfix, from userid 1001) id 51A05C01D; Sun, 21 Jun 2020 15:56:38 +0200 (CEST) Date: Sun, 21 Jun 2020 15:56:23 +0200 From: Dominique Martinet To: Alexander Kapshuk Cc: lucho@ionkov.net, ericvh@gmail.com, davem@davemloft.net, kuba@kernel.org, v9fs-developer@lists.sourceforge.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] net/9p: Validate current->sighand in client.c Message-ID: <20200621135623.GA20810@nautica> References: <20200621084512.GA720@nautica> <20200621135312.78201-1-alexander.kapshuk@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200621135312.78201-1-alexander.kapshuk@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Alexander Kapshuk wrote on Sun, Jun 21, 2020: > Fix rcu not being dereferenced cleanly by using the task > helpers (un)lock_task_sighand instead of spin_lock_irqsave and > spin_unlock_irqrestore to ensure current->sighand is a valid pointer as > suggested in the email referenced below. Ack. I'll take this once symbol issue is resolved ; thanks for your time. -- Dominique