linux-kernel - [PATCH 0/4] vsock/virtio: several fixes in the .probe() and .remove()

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Message-Id: <20190528105623.27983-1-sgarzare@redhat.com>
Date:   Tue, 28 May 2019 12:56:19 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        Stefan Hajnoczi <stefanha@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Michael S . Tsirkin" <mst@...hat.com>
Subject: [PATCH 0/4] vsock/virtio: several fixes in the .probe() and .remove()

During the review of "[PATCH] vsock/virtio: Initialize core virtio vsock
before registering the driver", Stefan pointed out some possible issues
in the .probe() and .remove() callbacks of the virtio-vsock driver.

This series tries to solve these issues:
- Patch 1 postpones the 'the_virtio_vsock' assignment at the end of the
  .probe() to avoid that some sockets queue works when the initialization
  is not finished.
- Patches 2 and 3 stop workers before to call vdev->config->reset(vdev) to
  be sure that no one is accessing the device, and adds another flush at the
  end of the .remove() to avoid use after free.
- Patch 4 free also used buffers in the virtqueues during the .remove().

Stefano Garzarella (4):
  vsock/virtio: fix locking around 'the_virtio_vsock'
  vsock/virtio: stop workers during the .remove()
  vsock/virtio: fix flush of works during the .remove()
  vsock/virtio: free used buffers during the .remove()

 net/vmw_vsock/virtio_transport.c | 105 ++++++++++++++++++++++++++-----
 1 file changed, 90 insertions(+), 15 deletions(-)

-- 
2.20.1