Winbindd consuming large amounts of CPU after adding/removing ACEs on share-level permissions

Richard Sharpe realrichardsharpe at
Tue Sep 17 20:07:42 CEST 2013

On Tue, Sep 17, 2013 at 10:58 AM, Jeremy Allison <jra at> wrote:
> On Tue, Sep 17, 2013 at 10:13:13AM -0700, Richard Sharpe wrote:
>> Hi folks,
>> We have seen a case or two recently where when someone added or
>> removed ACEs on share-level permissions, winbindd started consuming
>> 10% of the CPU on one core.
>> Has anyone seen this?
>> Samba 3.6.12+ (a few patches from later versions.)
> Yes - somehow winbindd has gotten a linked list
> corrupted and it's spinning going over that list.
> I've seen this reported (on 3.6.x, not in 4.0.x or
> above) but no one has ever been able to get a
> reproducible test case/backtrace that would allow
> us to track this down.
> If you can I would be eternally grateful :-).

Well, we have a couple of instances in the field, and I am hoping that
support can get me enough info to track this down.

We have not managed to repro it yet, unfortunately.

Richard Sharpe

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