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author | Stephen Hemminger <shemminger@vyatta.com> | 2008-07-25 08:48:32 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 17:53:45 (GMT) |
commit | 4ecb90090c84210a8bd2a9d7a5906e616735873c (patch) | |
tree | a7baec8859ff9750296be318400ba4475eb40b6c /init/main.c | |
parent | 99541c23cd32bacf1a591ca537a7c0cb9053ad7e (diff) | |
download | linux-fsl-qoriq-4ecb90090c84210a8bd2a9d7a5906e616735873c.tar.xz |
sysctl: allow override of /proc/sys/net with CAP_NET_ADMIN
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.
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.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrew Morgan <morgan@kernel.org>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/main.c')
0 files changed, 0 insertions, 0 deletions