Messages in this thread | | | Subject | Re: [PATCH] mutex: Always clear owner field upon mutex_unlock() | From | Davidlohr Bueso <> | Date | Tue, 06 Jan 2015 08:43:34 -0800 |
| |
On Tue, 2015-01-06 at 10:29 +0000, Chris Wilson wrote: > Currently if DEBUG_MUTEXES is enabled, the mutex->owner field is only > cleared iff debug_locks is active. This exposes a race to other users of > the field where the mutex->owner may be still set to a stale value, > potentially upsetting mutex_spin_on_owner() among others. > > References: https://bugs.freedesktop.org/show_bug.cgi?id=87955 > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
| |