lkml.org 
[lkml]   [2008]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] sysctl: allow override of /proc/sys/net with CAP_NET_ADMIN
Stephen Hemminger <shemminger@vyatta.com> writes:

> Extend the permission check for networking sysctl's to allow
> modification when current process has CAP_NET_ADMIN capability and
> is not root. This version uses the until now unused permissions hook
> to override the mode value for /proc/sys/net if accessed by a user
> with capabilities.

Looks reasonable but a little incomplete.

Could you modify register_net_sysctl_table to set this attribute?
Or alternatively all of the tables registered with register_net_sysctl.

Otherwise I this will not affect all of the sysctls under
/proc/sys/net. Which appears to be your intent.

> Found while working with Quagga. It is impossible to turn forwarding
> on/off through the command interface because Quagga uses secure coding
> practice of dropping privledges during initialization and only raising
> via capabilities when necessary. Since the dameon has reset real/effective
> uid after initialization, all attempts to access /proc/sys/net variables
> will fail.

Eric


\
 
 \ /
  Last update: 2008-05-31 04:03    [W:14.937 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site