linux-kernel - Re: NFS corruption, fixed by echo 1 > /proc/sys/vm/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-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1512767781.25033.30.camel@gmail.com>
Date:   Fri, 08 Dec 2017 13:16:21 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Matt Turner <mattst88@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
        linux-nfs@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Manuel Lauss <manuel.lauss@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: NFS corruption, fixed by echo 1 > /proc/sys/vm/drop_caches --
 next debugging steps?

On Fri, 2017-12-08 at 12:26 -0800, Matt Turner wrote:
> 
> Thanks for the quick reply!
> 
> I tried the patch on top of master, but unfortunately the corruption
> still occurs.

You might try replacing in sbdma_add_rcvbuffer()

sb_new = netdev_alloc_skb(dev, size);

by 

sb_new = alloc_skb(size, GFP_ATOMIC);

Maybe the device does not like having a frame spanning 2 pages.