netdev - tc filter add ... fw ... action drop

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]

Date:	Wed, 18 Jul 2007 08:58:41 +0530
From:	Abhijit Menon-Sen <ams@...oid.org>
To:	netdev@...r.kernel.org
Cc:	shemminger@...l.org
Subject: tc filter add ... fw ... action drop

Hi.

Is it a bug that:

  # tc filter add dev eth0 parent 1: protocol ip prio 0 handle 0xfffffff
    fw police rate 1 burst 1 mpu 0 mtu 1 action drop
                                         ^^^^^^^^^^^
creates a filter that looks like:

  # tc filter ls dev eth0
  filter parent 1: protocol ip pref 49152 fw 
  filter parent 1: protocol ip pref 49152 fw handle 0xfffffff police 0x1
  rate 0bit burst 0b mtu 1b action reclassify
                            ^^^^^^^^^^^^^^^^^
  ref -543190236 bind 4

(which reclassifies and thus lets 0xfffffff-marked packets through).

I'm pretty sure this used to work under 2.4.x (though I no longer have a
2.4 box to test with), but it hasn't worked on any of the 2.6.x kernels
I've tried (with both iproute2-ss060323 and 070710).

I haven't been able to find anything that suggests this change is
intentional. If it's not immediately obvious to anyone what the
problem is, I could try to track it down.

-- ams
-
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