netdev - Re: [net-next PATCH 2/3] net: fix enforcing of fragment queue hash list depth

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Message-ID: <1366382703.16391.2.camel@edumazet-glaptop>
Date:	Fri, 19 Apr 2013 07:45:03 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	netdev@...r.kernel.org
Subject: Re: [net-next PATCH 2/3] net: fix enforcing of fragment queue hash
 list depth

On Fri, 2013-04-19 at 14:19 +0200, Jesper Dangaard Brouer wrote:
> On Fri, 2013-04-19 at 03:11 -0700, Eric Dumazet wrote:

> > I am not sure its worth adding extra complexity.
> 
> It's not that complex, and we simply need it, else an attacker can DoS
> us very easily by sending a burst every 30 sec.  We do need this change,
> else we must revert Hannes patch, and find a complete other approach of
> removing the LRU list system.

Its a never ending stuff.

fragments are fundamentally not suitable for any workload that can be
attacked by an hostile guy.

The guy will adapt its strategy knowing yours.

Thats pretty easy for him, linux sources are public.


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