netdev - Re: [net-next v1] net/ipv6: allow any source address for sendmsg pktinfo with ip_nonlocal

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

Message-Id: <20180729.122828.2192078281117324633.davem@davemloft.net>
Date:   Sun, 29 Jul 2018 12:28:28 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     vincent@...nat.im
Cc:     kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, tom@...bertland.com
Subject: Re: [net-next v1] net/ipv6: allow any source address for sendmsg
 pktinfo with ip_nonlocal_bind

From: Vincent Bernat <vincent@...nat.im>
Date: Wed, 25 Jul 2018 13:19:13 +0200

> When freebind feature is set of an IPv6 socket, any source address can
> be used when sending UDP datagrams using IPv6 PKTINFO ancillary
> message. Global non-local bind feature was added in commit
> 35a256fee52c ("ipv6: Nonlocal bind") for IPv6. This commit also allows
> IPv6 source address spoofing when non-local bind feature is enabled.
> 
> Signed-off-by: Vincent Bernat <vincent@...nat.im>

This definitely seems to make sense.  And is consistent with the other
tests involving freebind and transparent.

This test involving ip_nonlocal_bind, freeebind, and transparent happens
in several locations.  Perhaps we should add a helper function for this?

Thanks.