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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 83B9EC433E0 for ; Sun, 21 Jun 2020 13:56:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FAEE2477D for ; Sun, 21 Jun 2020 13:56:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730152AbgFUN4k (ORCPT ); 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