linux-kernel - Re: Oops in scsi_send_eh_cmnd 2.6.21-rc5-git6,7,10,13

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Message-Id: <200704060221.l362LD4s025776@cichlid.com>
Date:	Thu, 5 Apr 2007 19:21:13 -0700
From:	Andrew Burgess <aab@...hlid.com>
To:	davem@...emloft.net, James.Bottomley@...elEye.com,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: Oops in scsi_send_eh_cmnd 2.6.21-rc5-git6,7,10,13


On Thu, 2007-04-05 at 15:36 -0700, David Miller wrote:
> From: Andrew Burgess <aab@...hlid.com>
> 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)


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