linux-kernel - Re: [PATCH] drm: stop vmgfx driver explosion

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Message-ID: <790319256.19256264.1345475045195.JavaMail.root@vmware.com>
Date:	Mon, 20 Aug 2012 08:04:05 -0700 (PDT)
From:	Jakob Bornecrantz <jakob@...are.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: stop vmgfx driver explosion

----- Original Message -----
> From: Alan Cox <alan@...ux.intel.com>
> 
> If you do a page flip with no flags set then event is NULL. If event
> is NULL then the vmw_gfx driver likes to go digging into NULL and
> extracts NULL->base.file_priv.
> 
> On a modern kernel with NULL mapping protection it's just another
> oops, without it there are some "intriguing" possibilities.
> 
> What it should do is an open question but that for the driver owners
> to sort out.
> 
> Signed-off-by: Alan Cox <alan@...ux.intel.com>

Thanks Alan!

Reviewed-by: Jakob Bornecrantz <jakob@...are.com>

I think CC stable is in order.

Cheers, Jakob.
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