netdev - RE: [PATCH] net: bridge: add max_fdb

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] [day] [month] [year] [list]

Date:   Tue, 21 Nov 2017 14:53:21 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Sarah Newman' <srn@...mr.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH] net: bridge: add max_fdb_count

From: Sarah Newman
> Sent: 15 November 2017 19:27
> Current memory and CPU usage for managing bridge fdb entries is unbounded.
> Add a parameter max_fdb_count, controlled from sysfs, which places an upper
> limit on the number of entries. Defaults to 1024.
> 
> When max_fdb_count is met or exceeded, whether traffic is sent out a
> given port should depend on its flooding behavior.

Does it make sense for a bridge to run in a mode where it doesn't
remember (all the) MAC addresses from one of its interfaces?
Rather than flood unknown addresses they are just sent to the
'everywhere else' interface.

	David