From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Burgess Subject: Re: Oops in scsi_send_eh_cmnd 2.6.21-rc5-git6,7,10,13 Date: Thu, 5 Apr 2007 19:21:13 -0700 Message-ID: <200704060221.l362LD4s025776@cichlid.com> Return-path: Received: from dsl-63-249-106-23.cruzio.com ([63.249.106.23]:49339 "EHLO cichlid.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767492AbXDFCVS (ORCPT ); Thu, 5 Apr 2007 22:21:18 -0400 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: davem@davemloft.net, James.Bottomley@SteelEye.com, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org On Thu, 2007-04-05 at 15:36 -0700, David Miller wrote: > From: Andrew Burgess > Date: Thu, 5 Apr 2007 15:13:27 -0700 > > > David, do you see any other problems with scsi_send_eh_cmnd? > > > > I've switched back to 2.6.18 which seems to not oops > > and am happy to try patches. > > Does 2.6.20 with my patch OOPS too? Does reverting my patch > make the oops go away? > > If reverting my patch makes the OOPS go away, we need to > verify if page_address() is returning crap for some reason > or the length is wrong. 2.6.20.4 with your patch dies in the memcpy (as does 21-gitN) 2.6.20.4 without your patch dies in the subsequent __free_page with a null pointer ref at 000...008 James should I try your posted patch? On which kernel? This machine will die in boot on these kernels until I power cycle it (which somehow fixes the disk/controller for a while), 2.6.18 continue to work (gets the scsi errors and continues)