netdev - Re: [PATCH] net: Fix security_socket

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 for Android: free password hash cracker in your pocket

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

Message-ID: <CANMAZFVfd_TfAhjJ+L3Qs4ae1KWPsfaG_RpS9MNzhOXFsOVdVA@mail.gmail.com>
Date:	Wed, 3 Aug 2011 16:37:06 +0300
From:	Eduard Sinelnikov <eduard.sinelnikov@...il.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: Fix security_socket_sendmsg() bypass problem.

Hi,

The scenario:
The scenario is:
* Create a bond with 3 interfaces (connect them to switch).
* Change bond's mode to active/backup.
* Physicly remove two cables form interfaces ( not the active interface ).
* Put the cables back
* Change the mode to round robin.
* Try to ping some other computer.

Now only one interface is pinging to remote computer.
Without removing the cables all three interface will ping to remote
computer periodicly.

The problem:
In the kernel 2.6.39.3 ( /drivers/net/bond/bond_main.c).
In the function  ‘bond_xmit_roundrobin’
The code check if the bond is active via
‘bond_is_active_slave(slave)’ Function call.
Which actually checks if the slave is backup or active
What is the meaning of slave being  backup in round robin mode?
Correct me if I wrong but in round robin every slave should send a
packet, regardless of being active or backup.

Thank you,
           Eduard
--
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