vsock/virtio: fix flush of works during the .remove()

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This patch moves the flush of works after vdev->config->del_vqs(vdev),
because we need to be sure that no workers run before to free the
'vsock' object.

Since we stopped the workers using the [tx|rx|event]_run flags,
we are sure no one is accessing the device while we are calling
vdev->config->reset(vdev), so we can safely move the workers' flush.

Before the vdev->config->del_vqs(vdev), workers can be scheduled
by VQ callbacks, so we must flush them after del_vqs(), to avoid
use-after-free of 'vsock' object.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Stefano Garzarella 2019-06-28 14:36:59 +02:00 • committed by David S. Miller

parent 17dd136738

commit 0d20e56ecc

1 changed files with 9 additions and 6 deletions

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15

net/vmw_vsock/virtio_transport.c

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