linux-kernel - Re: [PATCH 0/2] virtio_net: fix race in RX VQ processing

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Message-Id: <20130708.205452.1798118018128812181.davem@davemloft.net>
Date:	Mon, 08 Jul 2013 20:54:52 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mst@...hat.com
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	rusty@...tcorp.com.au, jasowang@...hat.com
Subject: Re: [PATCH 0/2] virtio_net: fix race in RX VQ processing

From: "Michael S. Tsirkin" <mst@...hat.com>
Date: Mon, 8 Jul 2013 12:05:26 +0300

> Jason Wang reported a race in RX VQ processing:
> virtqueue_enable_cb is called outside napi lock,
> violating virtio serialization rules.
> The race has been there from day 1, but it got especially nasty in 3.0
> when commit a5c262c5fd83ece01bd649fb08416c501d4c59d7
> "virtio_ring: support event idx feature"
> added more dependency on vq state.
> 
> Please review, and consider for 3.11 and for stable.
> 
> Jason, could you please report whether this fixes the issues for you?

Please resubmit with the minor coding style fix and Jason's Acked-by/Tested-by

Thanks.
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