From: Paul Durrant <Paul.Durrant@citrix.com>
To: Paul Durrant <Paul.Durrant@citrix.com>,
'Christoph Moench-Tegeder' <cmt@burggraben.net>
Cc: 'Michael Collins' <mike@ark-net.org>,
'Juergen Gross' <jgross@suse.com>, Wei Liu <wei.liu2@citrix.com>,
'Alex Braunegg' <alex.braunegg@gmail.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [BUG] kernel bug encountered at drivers/net/xen-netback/netback.c:430!
Date: Wed, 10 Jan 2018 13:58:33 +0000 [thread overview]
Message-ID: <6ca3b938cb2949fba04f7fc9ce89f5aa@AMSPEX02CL03.citrite.net> (raw)
In-Reply-To: <1fa2f53623a946e2b4ee2fc0b3632360@AMSPEX02CL03.citrite.net>
> -----Original Message-----
> From: Xen-devel [mailto:xen-devel-bounces@lists.xenproject.org] On Behalf
> Of Paul Durrant
> Sent: 10 January 2018 12:52
> To: 'Christoph Moench-Tegeder' <cmt@burggraben.net>
> Cc: 'Michael Collins' <mike@ark-net.org>; 'Juergen Gross'
> <jgross@suse.com>; Wei Liu <wei.liu2@citrix.com>; 'Alex Braunegg'
> <alex.braunegg@gmail.com>; xen-devel@lists.xenproject.org
> Subject: Re: [Xen-devel] [BUG] kernel bug encountered at drivers/net/xen-
> netback/netback.c:430!
>
> I have tracked down the problem to multiple calls to the zerocopy callback for
> the same ubuf_info. I am not sure exactly which patch introduced the issue
> but my suspicion is that it was one of the the MSG_ZEROCOPY series (see
> https://marc.info/?l=linux-netdev&m=149807997726733&w=2).
> I have a candidate patch to netback to make use of the ubuf_info ref count
> to handle the multiple callbacks and that certainly fixes the issue for me. I'll
> post this shortly recommending a backport to stable.
>
Actually no need... The underlying issue was really a bug and has been fixed in 4.14.11. See https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.14.13&id=17155ea827b2fd81330a442ed56d0edafd9969e1
Paul
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next prev parent reply other threads:[~2018-01-10 13:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-22 6:40 [BUG] kernel bug encountered at drivers/net/xen-netback/netback.c:430! Alex Braunegg
2017-12-22 6:47 ` Juergen Gross
2017-12-22 20:35 ` Alex Braunegg
2017-12-28 18:05 ` Michael Collins
2017-12-28 19:31 ` Alex Braunegg
2018-01-03 13:54 ` Paul Durrant
2018-01-03 18:43 ` Alex Braunegg
2018-01-03 20:33 ` Christoph Moench-Tegeder
2018-01-04 10:29 ` Paul Durrant
2018-01-07 22:19 ` 'Christoph Moench-Tegeder'
2018-01-08 9:35 ` Paul Durrant
2018-01-09 9:44 ` Paul Durrant
2018-01-10 12:52 ` Paul Durrant
2018-01-10 13:58 ` Paul Durrant [this message]
2018-01-10 17:53 ` 'Christoph Moench-Tegeder'
2018-01-10 19:55 ` Alex Braunegg
-- strict thread matches above, loose matches on Subject: below --
2017-12-20 21:03 Alex Braunegg
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