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From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	Rusty Russell <rusty@rustcorp.com.au>,
	Jason Wang <jasowang@redhat.com>,
	David Miller <davem@davemloft.net>
Subject: [PATCH 0/2] virtio_net: fix race in RX VQ processing
Date: Mon, 8 Jul 2013 12:05:26 +0300	[thread overview]
Message-ID: <1373274069-4301-1-git-send-email-mst@redhat.com> (raw)

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?

             reply	other threads:[~2013-07-08  9:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-08  9:05 Michael S. Tsirkin [this message]
2013-07-08  9:04 ` [PATCH 1/2] virtio: support unlocked queue poll Michael S. Tsirkin
2013-07-09  3:26   ` Jason Wang
2013-07-10  3:09   ` Rusty Russell
2013-07-10  4:38   ` Asias He
2013-07-08  9:04 ` [PATCH 2/2] virtio_net: fix race in RX VQ processing Michael S. Tsirkin
2013-07-08 12:52   ` Sergei Shtylyov
2013-07-08 13:08     ` Michael S. Tsirkin
2013-07-09  3:28   ` Jason Wang
2013-07-10  4:39     ` Asias He
2013-07-09  3:17 ` [PATCH 0/2] " Jason Wang
2013-07-09  3:54 ` David Miller

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