netdev - Re: [PATCH net] erspan: fix the tun_info options

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Message-Id: <20191029.173731.1151091692451287618.davem@davemloft.net>
Date:   Tue, 29 Oct 2019 17:37:31 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, u9012063@...il.com
Subject: Re: [PATCH net] erspan: fix the tun_info options_len check for
 erspan

From: Xin Long <lucien.xin@...il.com>
Date: Mon, 28 Oct 2019 23:19:35 +0800

> The check for !md doens't really work for ip_tunnel_info_opts(info) which
> only does info + 1. Also to avoid out-of-bounds access on info, it should
> ensure options_len is not less than erspan_metadata in both erspan_xmit()
> and ip6erspan_tunnel_xmit().
> 
> Fixes: 1a66a836da ("gre: add collect_md mode to ERSPAN tunnel")
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied and queued up for -stable, thank you.