netdev - Re: [PATCH net 0/2] Fix vlan tag handling for vlan packets without ethernet headers

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Date:   Fri, 30 Mar 2018 12:49:58 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     makita.toshiaki@....ntt.co.jp
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net 0/2] Fix vlan tag handling for vlan packets without
 ethernet headers

From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Date: Thu, 29 Mar 2018 19:05:28 +0900

> Eric Dumazet reported syzbot found a new bug which leads to underflow of
> size argument of memmove(), causing crash[1]. This can be triggered by tun
> devices.
> 
> The underflow happened because skb_vlan_untag() did not expect vlan packets
> without ethernet headers, and tun can produce such packets.
> I also checked vlan_insert_inner_tag() and found a similar bug.
> 
> This series fixes these problems.
> 
> [1] https://marc.info/?l=linux-netdev&m=152221753920510&w=2

Series applied, thank you.