Re: BUG: [<ffffffffa01dac02>] nfsd4_proc_compound+0x432/0x6c0 [nfsd]

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On Wed, Nov 12, 2014 at 11:28:21AM -0500, Jeff Layton wrote:
> On Wed, 12 Nov 2014 11:24:51 -0500
> "J. Bruce Fields" <bfields@xxxxxxxxxxxx> wrote:
> 
> > On Wed, Nov 12, 2014 at 11:19:55AM -0500, Jeff Layton wrote:
> > > Hi Bruce,
> > > 
> > > I've seen the following crash happen on a couple of different kernels
> > > recently. This one is from an older kernel that I just happened to be
> > > testing some other code on, but I've seen the same oops as well on
> > > v3.17.2 kernel from the fedora repos:
> > 
> > Do you have 51904b08072a "nfsd4: fix crash on unknown operation number"
> > ?
> > 
> > --b.
> > 
> 
> Ahh no...neither one has that. I'll apply it to the test kernel I'm
> using and see if it goes away. Thanks!
> 
> That said...wonder what the client would be sending that would cause
> this to fire?

There was a mis-merge, and CAP_SEEK is set in the wrong place in
fs/nfs/nfs4proc.c.  If you grep for CAP_SEEK in that file you'll see the
problem.

Trond, Anna, that still seems to be wrong upstream?  What happened to
that fix?

--b.
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