From: Willy Tarreau <w@1wt.eu>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jens Axboe <jens.axboe@oracle.com>,
Evgeniy Polyakov <zbr@ioremap.net>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: Data corruption issue with splice() on 2.6.27.10
Date: Wed, 7 Jan 2009 10:54:15 +0100 [thread overview]
Message-ID: <20090107095415.GB30749@1wt.eu> (raw)
In-Reply-To: <20090107095218.GA24264@gondor.apana.org.au>
On Wed, Jan 07, 2009 at 08:52:18PM +1100, Herbert Xu wrote:
> On Wed, Jan 07, 2009 at 07:38:59AM +0100, Willy Tarreau wrote:
> >
> > > Unfortunately, once the pipe is fed into sendpage we only use
> > > page reference counting to pin down the memory. So as soon as
> > > sendpage returns we drop the ref count on the skb, thus freeing
> > > the memory in skb->head, which is yet to be transmitted.
> >
> > So this means that anything relying on sendpage() is at risk ? What
>
> No the bug is in the splice code. sendfile() and other sendpage
> users are not affected.
but sendfile() now uses splice().
Willy
next prev parent reply other threads:[~2009-01-07 9:55 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-24 15:28 Data corruption issue with splice() on 2.6.27.10 Willy Tarreau
2009-01-06 8:54 ` Jarek Poplawski
2009-01-06 9:41 ` Willy Tarreau
2009-01-06 10:01 ` Jarek Poplawski
2009-01-06 10:04 ` Willy Tarreau
2009-01-06 15:57 ` Willy Tarreau
2009-01-07 9:39 ` Jarek Poplawski
2009-01-07 12:22 ` Willy Tarreau
2009-01-07 12:24 ` Herbert Xu
2009-01-07 12:38 ` Jarek Poplawski
2009-01-07 12:31 ` Jarek Poplawski
2009-01-07 12:35 ` Jens Axboe
2009-01-07 12:40 ` Evgeniy Polyakov
2009-01-07 12:52 ` Willy Tarreau
2009-01-07 12:53 ` Herbert Xu
2009-01-07 12:57 ` Evgeniy Polyakov
2009-01-07 13:08 ` Willy Tarreau
2009-01-07 12:49 ` Jarek Poplawski
2009-01-07 12:52 ` Herbert Xu
2009-01-07 13:00 ` Willy Tarreau
2009-01-07 13:01 ` Herbert Xu
2009-01-07 13:02 ` Jarek Poplawski
2009-01-12 12:02 ` Herbert Xu
2009-01-12 12:45 ` Evgeniy Polyakov
2009-01-12 12:56 ` Herbert Xu
2009-01-12 12:59 ` Evgeniy Polyakov
2009-01-12 21:11 ` Herbert Xu
2009-01-12 13:15 ` Jarek Poplawski
2009-01-12 21:12 ` Herbert Xu
2009-01-19 7:32 ` Jarek Poplawski
2009-01-07 12:39 ` Willy Tarreau
2009-01-07 12:56 ` Jarek Poplawski
2009-01-07 12:44 ` Herbert Xu
2009-01-06 17:42 ` Ben Mansell
2009-01-06 18:15 ` Willy Tarreau
2009-01-08 7:16 ` Jarek Poplawski
2009-01-08 8:05 ` Willy Tarreau
2009-01-08 14:53 ` Ingo Molnar
2009-01-08 15:16 ` Ben Mansell
2009-01-08 17:14 ` Willy Tarreau
2009-01-06 18:32 ` Evgeniy Polyakov
2009-01-06 18:37 ` Jens Axboe
2009-01-06 18:55 ` Willy Tarreau
2009-01-07 4:42 ` Herbert Xu
2009-01-07 6:38 ` Willy Tarreau
2009-01-07 9:52 ` Herbert Xu
2009-01-07 9:54 ` Willy Tarreau [this message]
2009-01-07 11:52 ` Herbert Xu
2009-01-07 8:17 ` Jens Axboe
2009-01-07 11:29 ` Evgeniy Polyakov
2009-01-07 11:50 ` Herbert Xu
2009-01-07 11:56 ` Evgeniy Polyakov
2009-01-07 11:59 ` Herbert Xu
2009-01-07 12:15 ` Evgeniy Polyakov
2009-01-07 12:22 ` Herbert Xu
2009-01-07 12:27 ` Herbert Xu
2009-01-07 12:30 ` Herbert Xu
2009-01-07 12:37 ` Evgeniy Polyakov
2009-01-07 12:42 ` Herbert Xu
2009-01-07 12:46 ` Evgeniy Polyakov
2009-01-07 12:55 ` Willy Tarreau
2009-01-07 12:57 ` Herbert Xu
2009-01-07 13:02 ` Evgeniy Polyakov
2009-01-07 13:10 ` Jarek Poplawski
2009-01-07 13:15 ` Willy Tarreau
2009-01-07 13:22 ` Jarek Poplawski
2009-01-07 14:01 ` Jarek Poplawski
2009-01-06 18:50 ` Willy Tarreau
2009-01-19 8:39 ` Lennert Buytenhek
2009-01-19 9:53 ` Willy Tarreau
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