netdev - [Patch v9 0/3] net: reserve ports for applications using fixed port numbers

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

Message-Id: <20100430082912.5630.82405.sendpatchset@localhost.localdomain>
Date:	Fri, 30 Apr 2010 04:25:15 -0400
From:	Amerigo Wang <amwang@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Octavian Purdila <opurdila@...acom.com>, ebiederm@...ssion.com,
	Eric Dumazet <eric.dumazet@...il.com>,
	penguin-kernel@...ove.SAKURA.ne.jp, netdev@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>,
	Amerigo Wang <amwang@...hat.com>, adobriyan@...il.com,
	David Miller <davem@...emloft.net>
Subject: [Patch v9 0/3] net: reserve ports for applications using fixed port numbers

Changes from the previous version:
- Dropped the infiniband part, because Tetsuo modified the related code,
  I will send a separate patch for it once this is accepted.
- Fixed some '\0' issues introduced by the previous version.
- Use copy_from_user(), instead of get_user().
- Use memchr().

------------------>

This patch introduces /proc/sys/net/ipv4/ip_local_reserved_ports which
allows users to reserve ports for third-party applications.

The reserved ports will not be used by automatic port assignments
(e.g. when calling connect() or bind() with port number 0). Explicit
port allocation behavior is unchanged.

There are still some miss behaviors with regard to proc parsing in odd
invalid cases (for "40000\0-40001" all is acknowledged but only 40000
is accepted) but they are not easy to fix without changing the current
"acknowledge how much we accepted" behavior.

Because of that and because the same issues are present in the
existing proc_dointvec code as well I don't think its worth holding
the actual feature (port reservation) after such petty error recovery
issues.

--
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