netdev - Re: [Patch net v2] mlx5: fixup checksum for short ethernet frame padding

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

Message-ID: <20181213084010.GB6169@pcnci.linuxbox.cz>
Date:   Thu, 13 Dec 2018 09:40:10 +0100
From:   Nikola Ciprich <nikola.ciprich@...uxbox.cz>
To:     Saeed Mahameed <saeedm@...lanox.com>
Cc:     "saeedm@....mellanox.co.il" <saeedm@....mellanox.co.il>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        Nikola Ciprich <nikola.ciprich@...uxbox.cz>
Subject: Re: [Patch net v2] mlx5: fixup checksum for short ethernet frame
 padding

Hi Saeed,

> for now i feel that you don't want csum complete in your servers and we
> already have the tool for that, just do:
> 
> ethtool --set-priv-flags <ifname> rx_no_csum_complete on
> ethtool --show-priv-flags <ifname>
> Private flags for p5p1:
> rx_cqe_moder       : on
> tx_cqe_moder       : off
> rx_cqe_compress    : off
> rx_striding_rq     : off
> rx_no_csum_complete: on
> 
> this will disable csum complete and avoid the csum error for padded
> short packets.

we're experiencing the same issue with 4.19 and I'd like to hotfix
it now before the issue is fixed in the kernel.. however I don't see
the flags in ethtool (even with latest 4.19 version..)

I'm using following cards:

d8:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

Am i doing something wrong, or is this different issue?

thanks a lot in advance

BR

nik







> 
> 
> Thanks,
> Saeed.
> 

-- 
-------------------------------------
Ing. Nikola CIPRICH
LinuxBox.cz, s.r.o.
28.rijna 168, 709 00 Ostrava

tel.:   +420 591 166 214
fax:    +420 596 621 273
mobil:  +420 777 093 799
www.linuxbox.cz

mobil servis: +420 737 238 656
email servis: servis@...uxbox.cz
-------------------------------------