netdev - Re: owner-Match in 2.6.20-rc5 (fwd)

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <Pine.LNX.4.61.0701252309200.17844@yvahk01.tjqt.qr>
Date:	Thu, 25 Jan 2007 23:14:49 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	David Miller <davem@...emloft.net>
cc:	kadlec@...ckhole.kfki.hu, netdev@...r.kernel.org,
	netfilter-devel@...ts.netfilter.org
Subject: Re: owner-Match in 2.6.20-rc5 (fwd)


>> >> The report below was posted on the netfilter user list. Isn't there any 
>> >> ill side effect by reverting the change?
>> >
>> >Performance regression :-(
>> >
>> >This optimization saves a whole handful of heavy atomic operations in
>> >the packet transmit path of TCP.
>> >
>> >As I understand it, the owner-Match is not in the upstream tree, and
>> >it's the only thing that cares, so I see no reason to cater for it.
>> 
>> For me, it's there.
>> -rw-r--r-- 1 jengelh users 2247 Jan 25 21:37
>> /erk/kernel/linux-2.6.20-rc6/net/ipv4/netfilter/ipt_owner.c
>
>Ok, I'll see what I can do about this :-)
>

People really depend on this. Much more than than pid/comm/smpunsafe stuff.
For example, a web server [cgi enabled, etc.] which also runs squid,
to force all webtraffic through it:

-A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner
  squid -j REDIRECT --to-ports 3128


	-`J'
-- 
-
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