Messages in this thread | | | Date | Thu, 31 Mar 2016 12:49:15 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH] kernfs: Move faulting copy_user operations outside of the mutex |
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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!
-- tejun
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