netdev - Re: [PATCH net] vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged

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Message-Id: <20180417.140239.267380066356294242.davem@davemloft.net>
Date:   Tue, 17 Apr 2018 14:02:39 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     makita.toshiaki@....ntt.co.jp
Cc:     netdev@...r.kernel.org, jesse@...nel.org
Subject: Re: [PATCH net] vlan: Fix reading memory beyond skb->tail in
 skb_vlan_tagged_multi

From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Date: Tue, 17 Apr 2018 18:46:14 +0900

> Syzkaller spotted an old bug which leads to reading skb beyond tail by 4
> bytes on vlan tagged packets.
> This is caused because skb_vlan_tagged_multi() did not check
> skb_headlen.
 ...
> Fixes: 58e998c6d239 ("offloading: Force software GSO for multiple vlan tags.")
> Reported-and-tested-by: syzbot+0bbe42c764feafa82c5a@...kaller.appspotmail.com
> Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>

Applied and queued up for -stable, thank you.