Messages in this thread | | | Subject | Re: [PATCH] kernfs: Move faulting copy_user operations outside of the mutex | From | Joonas Lahtinen <> | Date | Thu, 31 Mar 2016 20:30:05 +0300 |
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On to, 2016-03-31 at 12:49 -0400, Tejun Heo wrote: > On Thu, Mar 31, 2016 at 11:45:06AM +0100, Chris Wilson wrote: > > > > A fault in a user provided buffer may lead anywhere, and lockdep warns > > that we have a potential deadlock between the mm->mmap_sem and the > > kernfs file mutex: > ... > > > > Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94350 > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > > Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> > > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> > > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> > > Cc: Tejun Heo <tj@kernel.org> > > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > Cc: NeilBrown <neilb@suse.de> > > Cc: linux-kernel@vger.kernel.org > Acked-by: Tejun Heo <tj@kernel.org> >
Thanks.
I have applied this locally to our repo to be included into our CI builds.
We will drop the local patch once this waterfalls from upstream to our drm-intel-nightly repo.
Regards, Joonas -- Joonas Lahtinen Open Source Technology Center Intel Corporation
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