linux-kernel - Re: [PATCH net] net: openvswitch: fix nested key length validation in the set() action

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Message-ID: <f7tzfgigafe.fsf@redhat.com>
Date: Mon, 14 Apr 2025 09:05:57 -0400
From: Aaron Conole <aconole@...hat.com>
To: Ilya Maximets <i.maximets@....org>
Cc: netdev@...r.kernel.org,  "David S. Miller" <davem@...emloft.net>,  Eric
 Dumazet <edumazet@...gle.com>,  Jakub Kicinski <kuba@...nel.org>,  Paolo
 Abeni <pabeni@...hat.com>,  Simon Horman <horms@...nel.org>,
  dev@...nvswitch.org,  linux-kernel@...r.kernel.org,  Eelco Chaudron
 <echaudro@...hat.com>,
  syzbot+b07a9da40df1576b8048@...kaller.appspotmail.com
Subject: Re: [PATCH net] net: openvswitch: fix nested key length validation
 in the set() action

Ilya Maximets <i.maximets@....org> writes:

> It's not safe to access nla_len(ovs_key) if the data is smaller than
> the netlink header.  Check that the attribute is OK first.
>
> Fixes: ccb1352e76cf ("net: Add Open vSwitch kernel components.")
> Reported-by: syzbot+b07a9da40df1576b8048@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=b07a9da40df1576b8048
> Tested-by: syzbot+b07a9da40df1576b8048@...kaller.appspotmail.com
> Signed-off-by: Ilya Maximets <i.maximets@....org>
> ---

Acked-by: Aaron Conole <aconole@...hat.com>