[nfsv4] [nfsv4] NULL pointer dereference bug in 2.6.18-rc6-CITI_NFS4_ALL-1

[Bryce Harrington]

On Wed, Sep 27, 2006 at 08:01:56PM -0700, Bryce Harrington wrote:
> On Tue, Sep 26, 2006 at 05:53:45PM -0400, J. Bruce Fields wrote:
> > On Thu, Sep 14, 2006 at 03:55:40PM -0700, Bryce Harrington wrote:
> > > Jason noticed that in the latest CITI patch the kernel hits a bug during
> > > the LTP run with a krb5p mount.  There's also some interesting looking
> > > console output during the LTP runs with the other security flavors as
> > > well.
> > > 
> > > BUG: unable to handle kernel NULL pointer dereference at virtual address
> > > 00000000
> > > 
> > > Is this a known issue?  I haven't narrowed to which testcase in LTP is
> > > causing the failure but would guess it's likely to be either fsx or
> > > fsstress.  We can work on isolating these, if it might be useful?
> > 
> > Does this help?

Hi Bruce,

On doublechecking, it looks like the patch hadn't applied correctly the
first time, so disregard my previous message that the bug still exists.
We've verified that the patch does indeed fix it:

linux-2.6.18-rc6-CITI_NFS4_ALL-1:
    http://crucible.osdl.org/runs/2058/sysinfo/nfs03.messages

linux-2.6.18-rc6-CITI_NFS4_ALL-1 + nullptr patch:
    http://crucible.osdl.org/runs/2254/sysinfo/nfs03.messages

Thanks,
Bryce