netdev - Re: [PATCH net] l2tp: do not accept arbitrary sockets

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Date:   Wed, 07 Mar 2018 13:36:51 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     netdev@...r.kernel.org, jchapman@...alix.com, g.nault@...halink.fr
Subject: Re: [PATCH net] l2tp: do not accept arbitrary sockets

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 06 Mar 2018 07:54:53 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> syzkaller found an issue caused by lack of sufficient checks
> in l2tp_tunnel_create()
> 
> RAW sockets can not be considered as UDP ones for instance.
> 
> In another patch, we shall replace all pr_err() by less intrusive
> pr_debug() so that syzkaller can find other bugs faster.
 ...
> Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied and queued up for -stable, thanks.