Re: vfs: INFO: possible circular locking dependency detected

From: Dave Jones
Date: Wed May 09 2012 - 14:49:11 EST

On Wed, May 09, 2012 at 07:13:29PM +0200, Sasha Levin wrote:
> On Wed, May 9, 2012 at 6:37 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> > If that's _all_ that happened, I'm not particulary
> > concerned; it's not pretty, but saying "thou shalt not grab ->cred_guard_mutex
> > anywhere in ->read() on anything that has exec bits or might get one" is
> > not too terrible.  If that's something else, though, we might have a real
> > problem...
> That's probably the case. The proc file got chmodded and exec'ed.
> Can we do something to eliminate this false positive though? I can't
> think of anything nice...
> btw,
> I've never seen this issue before, even though I run same tests for a
> while now. What could have triggered it now?

Assuming you're running trinity du-jour, I only added fuzzing of execve yesterday.


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