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Date: Fri, 3 Apr 2020 19:41:56 -0700 From: Sultan Alsawaf <sultan@...neltoast.com> To: stable@...r.kernel.org, Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>, David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>, Chris Wilson <chris@...is-wilson.co.uk>, Ville Syrjälä <ville.syrjala@...ux.intel.com>, Matthew Auld <matthew.auld@...el.com>, Tvrtko Ursulin <tvrtko.ursulin@...el.com>, Mika Kuoppala <mika.kuoppala@...ux.intel.com>, Lionel Landwerlin <lionel.g.landwerlin@...el.com>, intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3] drm/i915: Synchronize active and retire callbacks On Fri, Apr 03, 2020 at 03:35:15PM -0700, Sultan Alsawaf wrote: > + ref->retire(ref); > + mutex_unlock(&ref->callback_lock); Ugh, this patch is still wrong because the mutex unlock after ref->retire() is a use-after-free. Fun times... Sultan
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