RE: 3.19 kernel: BUG: unable to handle kernel NULL pointer dereference

["Justin Piszcz" <jpiszcz@lucidpixels.com>]

> -----Original Message-----
> From: Justin Piszcz [mailto:jpiszcz@lucidpixels.com]
> Sent: Saturday, February 28, 2015 5:19 PM
> To: linux-kernel@vger.kernel.org
> Subject: RE: 3.19 kernel: BUG: unable to handle kernel NULL pointer
> dereference
> 
> 
> 
> > -----Original Message-----
> > From: Justin Piszcz [mailto:jpiszcz@lucidpixels.com]
> > Sent: Friday, February 27, 2015 10:54 AM
> > To: linux-kernel@vger.kernel.org
> > Subject: RE: 3.19 kernel: BUG: unable to handle kernel NULL pointer
> > dereference
> >
> >
> >
> > > -----Original Message-----
> > > From: Justin Piszcz [mailto:jpiszcz@lucidpixels.com]
> > > Sent: Friday, February 27, 2015 9:54 AM
> > > To: linux-kernel@vger.kernel.org
> > > Subject: 3.19 kernel: BUG: unable to handle kernel NULL pointer
> > dereference
> > >
> > > Hello,
> > >
> > > With kernel 3.15, I do not recall having any issues, with 3.19, I am
> > getting
> > > a kernel crash when I copy files over NFS from machine A to B.
> > > Is this a known issue?
> > >
> > > I suspect it has to do something with this:
> > > Feb 27 09:31:20 remote-host [   15.745342] dmar: DRHD: handling fault
> > status
> > > reg 2
> > > Feb 27 09:31:20 remote-host [   15.745361] dmar: DMAR:[DMA Read]
> > Request
> > > device [04:00.0] fault addr 0 #012[   15.745361] DMAR:[fault reason
06]
> > PTE
> > > Read access is not set
> > >
> >
> > [ .. ]
> >
> > Here is another crash with debugging enabled:
> >
> 
> [ .. ]
> 

[ . ]

Sorry for the spam-- still occurs, will remove the NVIDIA card, looks like
it is still an issue for users--
https://bugs.freedesktop.org/show_bug.cgi?id=66696

Justin.