netdev - sysctls below net.ipv[46].conf.all not working as expected

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-next>] [day] [month] [year] [list]

Message-ID: <20101229160607.GH14221@pengutronix.de>
Date:	Wed, 29 Dec 2010 17:06:07 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	netdev@...r.kernel.org
Subject: sysctls below net.ipv[46].conf.all not working as expected

Hello,

I did the following:

	cassiopeia:~# sysctl net.ipv6.conf.all.use_tempaddr
	net.ipv6.conf.all.use_tempaddr = 0

	cassiopeia:~# sysctl net.ipv6.conf.eth0.use_tempaddr
	net.ipv6.conf.eth0.use_tempaddr = 0

	cassiopeia:~# sysctl -w net.ipv6.conf.all.use_tempaddr=1
	net.ipv6.conf.all.use_tempaddr = 1

	cassiopeia:~# sysctl net.ipv6.conf.all.use_tempaddr
	net.ipv6.conf.all.use_tempaddr = 1

	cassiopeia:~# sysctl net.ipv6.conf.eth0.use_tempaddr
	net.ipv6.conf.eth0.use_tempaddr = 0

Here I would have expected that eth0's use_tempaddr is 1, too.  The
problem is not that this entry isn't writeable:

	cassiopeia:~# sysctl -w net.ipv6.conf.eth0.use_tempaddr=1
	net.ipv6.conf.eth0.use_tempaddr = 1

	cassiopeia:~# sysctl net.ipv6.conf.eth0.use_tempaddr
	net.ipv6.conf.eth0.use_tempaddr = 1

I got the same results when using net.ipv4.conf.all.rp_filter (and
net.ipv4.conf.eth0.rp_filter resp.)

Is this a bug or just my failure to see how conf/all works?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
--
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