netdev - Re: [PATCH] openvswitch: Avoid OOB read when parsing flow nlattrs

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Message-Id: <20190116.133558.743213363069866279.davem@davemloft.net>
Date:   Wed, 16 Jan 2019 13:35:58 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     ross.lagerwall@...rix.com
Cc:     netdev@...r.kernel.org, pshelar@....org, dev@...nvswitch.org
Subject: Re: [PATCH] openvswitch: Avoid OOB read when parsing flow nlattrs

From: Ross Lagerwall <ross.lagerwall@...rix.com>
Date: Mon, 14 Jan 2019 09:16:56 +0000

> For nested and variable attributes, the expected length of an attribute
> is not known and marked by a negative number.  This results in an OOB
> read when the expected length is later used to check if the attribute is
> all zeros. Fix this by using the actual length of the attribute rather
> than the expected length.
> 
> Signed-off-by: Ross Lagerwall <ross.lagerwall@...rix.com>

Applied.