linux-kernel - Re: [PATCH v2] virtio_console: fix a crash in config_work

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Message-ID: <20170116102723.GM16209@amit-lp.rh>
Date:   Mon, 16 Jan 2017 15:57:23 +0530
From:   Amit Shah <amit.shah@...hat.com>
To:     "G. Campana" <gcampana@...rkslab.com>
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>
Subject: Re: [PATCH v2] virtio_console: fix a crash in config_work_handler

On (Mon) 16 Jan 2017 [10:45:02], G. Campana wrote:
> Using control_work instead of config_work as the 3rd argument to
> container_of results in an invalid portdev pointer. Indeed, the work
> structure is initialized as below:
> 
>     INIT_WORK(&portdev->config_work, &config_work_handler);
> 
> It leads to a crash when portdev->vdev is dereferenced later. This bug
> is triggered when the guest uses a virtio-console without multiport
> feature and receives a config_changed virtio interrupt.
> 
> Signed-off-by: G. Campana <gcampana@...rkslab.com>

Reviewed-by: Amit Shah <amit.shah@...hat.com>

Michael, can you please pick this up?

		Amit