From: Stephen Hemminger <shemminger@osdl.org>
To: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: Re: [RFC] tcp: setsockopt congestion control autoload
Date: Thu, 26 Oct 2006 07:34:57 -0700 [thread overview]
Message-ID: <4540C791.5060200@osdl.org> (raw)
In-Reply-To: <20061026052253.GA10188@2ka.mipt.ru>
Evgeniy Polyakov wrote:
> On Wed, Oct 25, 2006 at 11:08:43AM -0700, Stephen Hemminger (shemminger@osdl.org) wrote:
>
>> If user asks for a congestion control type with setsockopt() then it
>> may be available as a module not included in the kernel already.
>> It should be autoloaded if needed. This is done already when
>> the default selection is change with sysctl, but not when application
>> requests via sysctl.
>>
>> Only reservation is are there any bad security implications from this?
>>
>
> What if system is badly configured, so it is possible to load malicious
> module by kernel?
>
>
The kernel module loader has a fixed path. So one would have to be able
to create a module
in /lib/modules/<kernel release> in order to get the malicious code
loaded. If the intruder could
put a module there, it would be just as easy to patch an existing module
and have the
hack available on reboot.
next prev parent reply other threads:[~2006-10-26 14:35 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-25 18:08 [RFC] tcp: setsockopt congestion control autoload Stephen Hemminger
2006-10-25 23:21 ` Patrick McHardy
2006-10-26 5:22 ` Evgeniy Polyakov
2006-10-26 14:34 ` Stephen Hemminger [this message]
2006-10-26 14:57 ` Evgeniy Polyakov
2006-10-26 15:23 ` Stephen Hemminger
2006-10-26 17:05 ` Patrick McHardy
2006-10-26 20:55 ` David Miller
2006-10-26 17:29 ` John Heffner
2006-10-26 20:57 ` David Miller
2006-10-26 22:44 ` Hagen Paul Pfeifer
2006-10-26 22:53 ` John Heffner
2006-10-26 23:52 ` [PATCH] Check if user has CAP_NET_ADMIN to change congestion control algorithm Hagen Paul Pfeifer
2006-10-26 23:59 ` Ian McDonald
2006-10-27 0:07 ` David Miller
2006-10-27 0:20 ` Ian McDonald
2006-10-27 0:02 ` David Miller
2006-10-27 10:43 ` Hagen Paul Pfeifer
2006-10-27 14:41 ` Stephen Hemminger
2006-10-27 15:21 ` Hagen Paul Pfeifer
2006-10-27 15:48 ` Stephen Hemminger
2006-10-27 17:30 ` [PATCH] tcp: don't allow unfair congestion control to be built without warning Stephen Hemminger
2006-10-27 17:43 ` John Heffner
2006-10-27 17:59 ` [PATCH] tcp: allow restricting congestion control choices Stephen Hemminger
2006-10-27 21:17 ` [PATCH] tcp: don't allow unfair congestion control to be built without warning David Miller
2006-10-27 21:24 ` Stephen Hemminger
2006-10-27 21:37 ` David Miller
2006-10-27 21:59 ` Stephen Hemminger
2006-10-27 22:12 ` David Miller
2006-10-27 22:21 ` Stephen Hemminger
2006-10-27 22:24 ` David Miller
2006-10-28 0:48 ` Stephen Hemminger
2006-10-28 3:10 ` [RFC] tcp: available congetsion control Stephen Hemminger
2006-10-27 21:22 ` [PATCH] Check if user has CAP_NET_ADMIN to change congestion control algorithm David Miller
2006-10-27 1:03 ` Stephen Hemminger
2006-10-27 18:14 ` [PATCH] tcp: setsockopt congestion control autoload Stephen Hemminger
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