netdev - Re: RFC Hanging clean-up of a namespace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20120119214718.GC3347849@jupiter.n2.diac24.net>
Date:	Thu, 19 Jan 2012 22:47:18 +0100
From:	David Lamparter <equinox@...c24.net>
To:	Hagen Paul Pfeifer <hagen@...u.net>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Miller <davem@...emloft.net>, equinox@...c24.net,
	hans.schillstrom@...csson.com, netdev@...r.kernel.org
Subject: Re: RFC Hanging clean-up of a namespace

On Thu, Jan 19, 2012 at 10:40:53PM +0100, Hagen Paul Pfeifer wrote:
> * Eric W. Biederman | 2012-01-19 13:24:13 [-0800]:
> 
> >This thread is a fascinating disconnect from reality all of the way
> >around.
> >
> >- inet_twsk_purge already implements throwing out of timewait sockets
> >  when a network namespaces is being cleaned up.  So the RFC is nonsense.
> 
> This is how it is implemented, not how it should be. TIME_WAIT is not the
> problem, it is there to keep the stack from sending wrong RST messages. Maybe
> the 2*MSL could be fixed by a more accurate 2*RTT.

I may have made that argument hidden behind a joke, but please refer to
the development of RFC 793's bootup "quiet time". The reason no one
sticks to this quiet time is that TCP timestamps have obsoleted it by
providing a better frame of reference. Refer to RFC 1323 Appendix B
"DUPLICATES FROM EARLIER CONNECTION INCARNATIONS".


-David
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html