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>] [day] [month] [year] [list]
Message-ID: <CAA85sZtKBAdUqmJS2xPA3AbZfA7+jqQRxKKjY9GCckfG-LgRtw@mail.gmail.com>
Date:   Wed, 17 Apr 2019 10:42:45 +0200
From:   Ian Kumlien <ian.kumlien@...il.com>
To:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: [BUG?] arp_cache: neighbor table overflow... and DoS

Hi,

I'm part of a team running a small:ish cloud - we have an issue atm
where neutron thinks that some hosts exists
and should be linked. This results in a arp flood - which on it's own
is not a problem.

As soon as we get "neighbour: arp_cache: neighbor table overflow!" the
machine stops responding to connections..
Even if this feels like a bit of a special case, it also feels *very* wrong ;)

It's like the "I can't find" queries add to the cache without adding a
entry - arp -a - n |wc -l is only 149 f.ex.

Anyone with ideas or clues?

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ