Winbindd using 100% of CPU. Any solution?

[Jeremy Allison]

On Tue, Dec 17, 2013 at 03:24:15PM -0800, Richard Sharpe wrote:
> On Mon, Dec 16, 2013 at 1:56 PM, Richard Sharpe
> <realrichardsharpe at gmail.com> wrote:
> > On Mon, Dec 16, 2013 at 11:10 AM, Richard Sharpe
> > <realrichardsharpe at gmail.com> wrote:
> >
> > More info ... because I see this in the log:
> >
> >    adding 0x80334c940 to list at 0xeac360
> >
> > but do not see this:
> >
> >    removing %p from list %p
> >
> > and because I see that the PID has been initialized, it looks like
> > child->sock has been set to -1 without removing the child from the
> > winbindd_children list!
> 
> OK, I think I have the smoking gun.
> 
> Here is what I see in the log:
> 
> [2013/12/17 16:34:08.459496, 10]
> winbindd/winbindd_dual.c:1385(fork_domain_child)
>   fork_domain_child called for domain 'EXCHANGE'
> [2013/12/17 16:34:08.460496, 10]
> winbindd/winbindd_dual.c:1438(fork_domain_child)
>   Child process 15002
> [2013/12/17 16:34:08.460496,  0]
> winbindd/winbindd_dual.c:1430(fork_domain_child)
>   adding 0x803358760 to list at 0x80330b100
> 
> then a little while later:
> 
> [2013/12/17 16:39:07.843301, 10]
> winbindd/winbindd_dual.c:1385(fork_domain_child)
>   fork_domain_child called for domain 'XCHANGE'
> [2013/12/17 16:39:07.844302, 10]
> winbindd/winbindd_dual.c:1438(fork_domain_child)
>   Child process 18746
> [2013/12/17 16:39:07.845302,  0]
> winbindd/winbindd_dual.c:1430(fork_domain_child)
>   adding 0x803358760 to list at 0x803358760
> [2013/12/17 16:39:07.845302,  0]
> winbindd/winbindd_dual.c:1430(fork_domain_child)
>   adding 0x803358760 to list at 0x803358760
> [2013/12/17 16:39:07.847307,  0] lib/util.c:1117(smb_panic)
>   PANIC (pid 14996): duplicate!
> 
> It seems that there are two domains with similar names and winbindd is
> treating them the same:

Are there really two such domains, or is this an off-by-one
pointer error somewhere :

EXCHANGE
-XCHANGE
 ^
 |
 pointer moved forward by one here ?