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Message-ID: <1473272986.10218.57.camel@redhat.com>
Subject: Re: [PATCH v2] usercopy: remove page-spanning test for now
From: Rik van Riel <riel@redhat.com>
To: Kees Cook <keescook@chromium.org>,
        Thomas Hellstrom <thellstrom@vmware.com>
Cc: Laura Abbott <labbott@redhat.com>,
        VMware Graphics <linux-graphics-maintainer@vmware.com>,
        Sinclair Yeh <syeh@vmware.com>, Vinson Lee <vlee@freedesktop.org>,
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Date: Wed, 07 Sep 2016 14:29:46 -0400
In-Reply-To: <20160907180845.GA31134@www.outflux.net>
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On Wed, 2016-09-07 at 11:08 -0700, Kees Cook wrote:
> A custom allocator without __GFP_COMP that copies to userspace has
> been
> found in vmw_execbuf_process[1], so this disables the page-span
> checker
> by placing it behind a CONFIG for future work where such things can
> be
> tracked down later.
>=20
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=3D1373326
>=20
> Reported-by: Vinson Lee <vlee@freedesktop.org>
> Fixes: f5509cc18daa ("mm: Hardened usercopy")
> Signed-off-by: Kees Cook <keescook@chromium.org>

Reviewed-by: Rik van Riel <riel@redhat.com>

--=20
All rights reversed

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