linux-kernel - Re: Data corruption issue with splice() on 2.6.27.10

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: <20090106100112.GB9513@ff.dom.local>
Date:	Tue, 6 Jan 2009 10:01:13 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: Data corruption issue with splice() on 2.6.27.10

On Tue, Jan 06, 2009 at 10:41:38AM +0100, Willy Tarreau wrote:
...
> > Great story! Alas I don't understand this fully either, but it seems
> > Changli Gao was concerned with sendpage sending this "as pages", so
> > when NETIF_F_SG flag is available. Did you try this without SG btw?
> 
> No I did not. I can try, it's not too hard. It would in part defeat the
> purpose of the mechanism (especially at 10 Gbps) but at least it will
> help narrow the problem down.

Yes, I meant it only as a proof of concept. BTW, delaying TCP acks a
bit for these sendpages should then make it more reproducible, I guess.

Jarek P.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/