From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: kernel BUG at kernel/timer.c:748! Date: Mon, 24 Sep 2012 14:11:52 -0400 Message-ID: <20120924181152.GA31183@redhat.com> References: <20120914212958.GA25053@redhat.com> <20120919211059.GA10985@redhat.com> <1348092082.31352.51.camel@edumazet-glaptop> <20120920020223.GA28110@redhat.com> <20120924153921.GA13845@redhat.com> <1348504445.26828.1131.camel@edumazet-glaptop> <1348506011.26828.1195.camel@edumazet-glaptop> <20120924171152.GA26454@redhat.com> <1348507878.26828.1271.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Yuchung Cheng , Julian Anastasov , netdev@vger.kernel.org To: Eric Dumazet Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63204 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757174Ab2IXSME (ORCPT ); Mon, 24 Sep 2012 14:12:04 -0400 Content-Disposition: inline In-Reply-To: <1348507878.26828.1271.camel@edumazet-glaptop> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, Sep 24, 2012 at 07:31:18PM +0200, Eric Dumazet wrote: > On Mon, 2012-09-24 at 13:11 -0400, Dave Jones wrote: > > > Great, I'll give this a shot. > > > > Any idea why this only just started triggering ? > > (Ie, do we need this for stable too?) > > Seems this is a very old bug. Indeed. As far as I can tell, this goes back to 2.1.8, back in November 1996. > I guess your trinity tool gets better ? Possible. Or it may be that it was finding other bugs first that are now fixed, that prevented us getting far enough along to try this. > I used following program to trigger the bug : I'm sure reproducers like that will be appreciated by anyone running QA tests on older kernels. tangent: Is there any kind of networking correctness suite other than fuzz testers like isic etc ? thanks, Dave