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netlink.7: Note cases where nonprivileged users can use netlink multicast groups 

See also https://bugzilla.novell.com/show_bug.cgi?id=754611

Reported-by: Petr Gajdos <pgajdos@suse.cz>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Jeff Mahoney 2012-04-14 13:32:33 +12:00 committed by Michael Kerrisk
parent 1d7824bbfe
commit dfad7db9a2
1 changed files with 11 additions and 1 deletions
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12
man7/netlink.7
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@ -4,7 +4,7 @@
.\" Based on the original comments from Alexey Kuznetsov
.\" Modified 2005-12-27 by Hasso Tepper <hasso@estpak.ee>
.\" $Id: netlink.7,v 1.8 2000/06/22 13:23:00 ak Exp $
.TH NETLINK 7 2008-11-11 "Linux" "Linux Programmer's Manual"
.TH NETLINK 7 2012-04-14 "Linux" "Linux Programmer's Manual"
.SH NAME
netlink \- Communication between kernel and userspace (AF_NETLINK)
.SH SYNOPSIS
@ -343,6 +343,16 @@ Only processes with an effective UID of 0 or the
capability may send or listen to a netlink multicast group.
Any replies to a message received for a multicast group should be
sent back to the sending PID and the multicast group.
Some Linux kernel subsystems may additionally allow other users
to send and/or receive messages.
As at Linux 3.0, the
.BR NETLINK_KOBJECT_UEVENT ,
.BR NETLINK_GENERIC ,
.BR NETLINK_ROUTE ,
and
.BR NETLINK_SELINUX
groups allow other users to receive messages.
No groups allow other users to send messages.
.SH VERSIONS
The socket interface to netlink is a new feature of Linux 2.2.