From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 12 Feb 2003 13:18:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 12 Feb 2003 13:18:53 -0500 Received: from air-2.osdl.org ([65.172.181.6]:40422 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id ; Wed, 12 Feb 2003 13:18:52 -0500 Date: Wed, 12 Feb 2003 10:25:40 -0800 From: "Randy.Dunlap" To: Andrew Morton Cc: root@chaos.analogic.com, linux-kernel@vger.kernel.org Subject: Re: Panic `cat /proc/ioports` Message-Id: <20030212102540.7fe1e55d.rddunlap@osdl.org> In-Reply-To: <20030212092224.27aa4723.akpm@digeo.com> References: <20030211154413.19a172f4.akpm@digeo.com> <20030212092224.27aa4723.akpm@digeo.com> Organization: OSDL X-Mailer: Sylpheed version 0.8.6 (GTK+ 1.2.10; i586-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 12 Feb 2003 09:22:24 -0800 Andrew Morton wrote: | "Richard B. Johnson" wrote: | > | > On Tue, 11 Feb 2003, Andrew Morton wrote: | > | > > "Richard B. Johnson" wrote: | > > > | > > > Linux version 2.4.18, after it runs for a few days, will panic | > > > if I do `cat /proc/ioports`. Has this been reported/fixed in | > > > later versions? | > > > | > > > : Unable to handle kernel paging request at virtual address d48e2fa0 | > > | > > This means that some driver which was previously loaded forgot to do a | > > release_region(). Later, the /proc code tries to read stuff from within the | > > driver which isn't there any more and oopses. | > > | > | > Yes. I just noticed that most network board drivers in version 2.4.18 | > do not execute release_region() after they have done a request_region(), | > if they fail to install because of some error. | | Fairly common error. | | > The error in this case was | > the failure to allocate memory because I told the kernel I only had 4 | > megabytes (exprimental ioremap() of the rest in another module). | > | > Is somebody fixing these drivers (do you know). | | There is ongoing janitorial work, and things are getting better. | But I'm not aware of anyone specifically auditing for missing | release_region()s. And given that it is a box-killer rather than | just a memory leak, yes, it is worth an audit. Dick, Did you ever determine which driver (or module) was causing this problem? -- ~Randy