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Message-ID: <1412608214-31944-16-git-send-email-mst@redhat.com> Date: Mon, 6 Oct 2014 18:11:35 +0300 From: "Michael S. Tsirkin" <mst@...hat.com> To: linux-kernel@...r.kernel.org Cc: kvm@...r.kernel.org, Rusty Russell <rusty@...tcorp.com.au>, virtualization@...ts.linux-foundation.org, Cornelia Huck <cornelia.huck@...ibm.com>, netdev@...r.kernel.org Subject: [PATCH v2 15/15] virtio_net: fix use after free on allocation failure In the extremely unlikely event that driver initialization fails after RX buffers are added, virtio net frees RX buffers while VQs are still active, potentially causing device to use a freed buffer. To fix, reset device first - same as we do on device removal. Signed-off-by: Michael S. Tsirkin <mst@...hat.com> Reviewed-by: Cornelia Huck <cornelia.huck@...ibm.com> --- drivers/net/virtio_net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 430f3ae..3551417 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1830,6 +1830,8 @@ static int virtnet_probe(struct virtio_device *vdev) return 0; free_recv_bufs: + vi->vdev->config->reset(vdev); + free_receive_bufs(vi); unregister_netdev(dev); free_vqs: -- MST -- 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/
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