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Subject: Re: REGRESSION: in intel video driver following introduction of mm_struct.has_pinned
From:   Chris Wilson <chris@chris-wilson.co.uk>
To:     Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        Tony Fischetti <tony.fischetti@gmail.com>, airlied@linux.ie,
        intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com,
        linux-kernel@vger.kernel.org, peterx@redhat.com,
        rodrigo.vivi@intel.com
Date:   Tue, 29 Sep 2020 09:23:41 +0100
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Quoting Joonas Lahtinen (2020-09-29 09:18:34)
> (+ intel-gfx for being i915 related)
> (+ Chris who has looked into the issue)
> 
> Hi,
> 
> Thanks for reporting!

Fixed in commit a4d63c3732f1a0c91abcf5b7f32b4ef7dcd82025
Author: Jason A. Donenfeld <Jason@zx2c4.com>
Date:   Mon Sep 28 12:35:07 2020 +0200

    mm: do not rely on mm == current->mm in __get_user_pages_locked
-Chris