netdev - Re: [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits

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 for Android: free password hash cracker in your pocket

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

Message-ID: <CABOR3+zQ0yfbcon6bv5TXrrAomoWLxy101iEXqBycDTrhytDiA@mail.gmail.com>
Date:   Fri, 2 Aug 2019 21:58:12 +0200
From:   Bernd <ecki@...ammenkunft.net>
To:     Neal Cardwell <ncardwell@...gle.com>
Cc:     netdev <netdev@...r.kernel.org>, edumazet@...gle.com
Subject: Re: [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits

2019-08-02 21:14 GMT+02:00, Neal Cardwell <ncardwell@...gle.com>:
> What's the exact kernel version you are using?

It is the RHEL errata kernel 3.10.0-957.21.3.el7 (rhsa-2019:1481), i
need to check if there is a newer one.

> Eric submitted a patch recently that may address your issue:
>    tcp: be more careful in tcp_fragment()
>
> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=b617158dc096709d8600c53b6052144d12b89fab
>
> Would you be able to test your workload with that commit
> cherry-picked, and see if the issue still occurs?

It only happens on a customer system in production up to now, so most
likely not.

> That commit was targeted to many stable releases, so you may be able
> to pick up that fix from a stable branch.

The only thing which is a bit strange, this is a Java client, and I am
pretty sure we don’t set a small SO_SNDBUF, if anything it is
increased (I need to verify that).

Not to worry, I guess I can now with your helpful pointer sort that
out with Redhat.

gruss
Bernd