Re: cifs mount regression in 4.8 and 4.4 stable

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On Thu, Sep 22, 2016 at 10:27:56AM -0500, Seth Forshee wrote:
> On Thu, Sep 22, 2016 at 04:17:09PM +0100, Sachin Prabhu wrote:
> > On Thu, 2016-09-22 at 10:09 -0500, Seth Forshee wrote:
> > > We've received reports from users of a cifs mount regression in our
> > > 4.4-based kernel, e.g. [1]. It is fixed by reverting the follwing
> > > commit
> > > from 4.8 which was applied to 4.4 stable:
> > > 
> > >  a6b5058 fs/cifs: make share unaccessible at root level mountable
> > > 
> > > Testing against 4.8-rc7 shows that the problem is present there as
> > > well.
> > > 
> > > Thanks,
> > > Seth
> > > 
> > > [1] http://bugs.launchpad.net/bugs/1626112
> > 
> > Hello Seth, 
> > 
> > We have identified some regressions introduced by the mentioned patch
> > These include
> 
> I saw those, but none of the ones already in Linus's tree fix the
> problem.
> 
> > a) mounting of DFS shares breaks. The fix is included in Steve's tree
> > at
> > https://git.samba.org/?p=sfrench/cifs-2.6.git;a=commit;h=de5233745cd59c
> > f5853d963ad216067788a87594
> 
> However this one isn't in Linus's tree yet.
> 
> I'm not certain what circumstances cause the failure, but based on what
> I see in dmesg it looks likely that this one is the fix. I'll get some
> testing with this applied.

Looks like this is is the fix we need. Thanks for your help.

Seth
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