netdev - Re: [net] vxlan: fix use-after-free on deletion

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Message-ID: <20170601105308.0be70eb4@griffin>
Date:   Thu, 1 Jun 2017 10:53:08 +0200
From:   Jiri Benc <jbenc@...hat.com>
To:     Mark Bloch <markb@...lanox.com>
Cc:     <roopa@...ulusnetworks.com>, <netdev@...r.kernel.org>
Subject: Re: [net] vxlan: fix use-after-free on deletion

On Thu, 1 Jun 2017 11:43:35 +0300, Mark Bloch wrote:
> Adding a vxlan interface to a socket isn't symmetrical, while adding
> is done in vxlan_open() the deletion is done in vxlan_dellink().
> This can cause a use-after-free error when we close the vxlan
> interface before deleting it.
> 
> We add vxlan_vs_del_dev() to match vxlan_vs_add_dev() and call
> it from vxlan_stop() to match the call from vxlan_open().
> 
> Signed-off-by: Mark Bloch <markb@...lanox.com>

Acked-by: Jiri Benc <jbenc@...hat.com>