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=-2.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 E0403C54E8D for ; Mon, 11 May 2020 14:13:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C068220708 for ; Mon, 11 May 2020 14:13:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589206412; bh=Rbj8XlWK76B0liJErNbu2w/UZMm56uz0sBbtyXLGy5w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=RWvbyAwU+OGi6VG0b061iTZ8tUaElKETs2E2an1VMIbj90YJetTQ90i+Y5cTFSPgm 2Ni6MbR6TKUtW54BHaKTVutxGigadozl3NVlzdEvBdAzuGZrDqBmsHlYsIidne5uKj IAWK6ASJpA2GVj6+u7TLtu+VtyltoAHoBtRLEdjM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730477AbgEKONa (ORCPT ); Mon, 11 May 2020 10:13:30 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:37778 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730158AbgEKONa (ORCPT ); Mon, 11 May 2020 10:13:30 -0400 Received: by mail-pl1-f194.google.com with SMTP id x10so3992299plr.4; Mon, 11 May 2020 07:13:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=OZEIorHaxAgVk8tXwMYpPYJTnU15riroFxTlZzxMGoY=; b=NFwnbaRdKb/MG0EhIoKzcerRLvdISY08pDODi09BCWepHTec4ARyeTzmgH5mKEzLep khF5Ho0acAdDLc1JzSxJFTZPF4RNkV+ZNRUzcyPQMi8y4GCzr0JK4bZr9fLSSMlx5eNH quY80wmvM43Sp2ZErumQ1sudYWckLUKPbjciHZ2OGDKqHCeuq4PsidBQbXbY1lCFsnS8 RbrPAaPm5FFa7OO6XzjmFRrJ3p0xML64tT6/p2af71b5JuOoU0h89i4fFOJqOyCKGz1k V6RegZTrdIQU91zM6ggJ6XOUbxzziFOYdECMtiAVX0ohcAkFJfT65X642AcOTCxE+SIh 6UhA== X-Gm-Message-State: AGi0PuakkDQJbuVeisQ6nZwGkQUO2Mn83Po0h1mXRI632R9eSOvGZqM+ NFgNUXMUrqhjgtyDaJ1ukpU= X-Google-Smtp-Source: APiQypKUuFyt94VWg5zbOUc0tpZSyVaLJaz5nZz5HPWNK22nq+c7IWmoodIm6WEFGB2pMV3qQbTqlg== X-Received: by 2002:a17:90a:ead6:: with SMTP id ev22mr22563757pjb.94.1589206409284; Mon, 11 May 2020 07:13:29 -0700 (PDT) Received: from 42.do-not-panic.com (42.do-not-panic.com. [157.230.128.187]) by smtp.gmail.com with ESMTPSA id q62sm4723143pfc.132.2020.05.11.07.13.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2020 07:13:27 -0700 (PDT) Received: by 42.do-not-panic.com (Postfix, from userid 1000) id 0DB6940605; Mon, 11 May 2020 14:13:27 +0000 (UTC) Date: Mon, 11 May 2020 14:13:27 +0000 From: Luis Chamberlain To: Shannon Nelson Cc: Andrew Lunn , jeyu@kernel.org, akpm@linux-foundation.org, arnd@arndb.de, rostedt@goodmis.org, mingo@redhat.com, aquini@redhat.com, cai@lca.pw, dyoung@redhat.com, bhe@redhat.com, peterz@infradead.org, tglx@linutronix.de, gpiccoli@canonical.com, pmladek@suse.com, tiwai@suse.de, schlad@suse.de, andriy.shevchenko@linux.intel.com, keescook@chromium.org, daniel.vetter@ffwll.ch, will@kernel.org, mchehab+samsung@kernel.org, kvalo@codeaurora.org, davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 00/15] net: taint when the device driver firmware crashes Message-ID: <20200511141326.GQ11244@42.do-not-panic.com> References: <20200509043552.8745-1-mcgrof@kernel.org> <1e097eb0-6132-f549-8069-d13b678183f5@pensando.io> <20200510015814.GE362499@lunn.ch> <01831b19-5890-e7e0-3801-068dfab5c92a@pensando.io> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <01831b19-5890-e7e0-3801-068dfab5c92a@pensando.io> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Sat, May 09, 2020 at 07:15:23PM -0700, Shannon Nelson wrote: > On 5/9/20 6:58 PM, Andrew Lunn wrote: > > On Sat, May 09, 2020 at 06:01:51PM -0700, Shannon Nelson wrote: > > As for firmware, how much damage can the firmware do as it crashed? If > > it is a DMA master, it could of splattered stuff through > > memory. Restarting the firmware is not going to reverse the damage it > > has done. > > > True, and tho' the driver might get the thing restarted, it wouldn't > necessarily know what kind of damage had ensued. Indeed, it is those uknowns which we currently assume is just fine, but in reality can be damaging. Today we just move on with life, but such information is useful for analysis. Luis