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| author | Jason Wang <jasowang@redhat.com> | 2022-06-20 13:11:14 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-06-27 08:04:30 -0400 |
| commit | 11a37eb66812ce6a06b79223ad530eb0e1d7294d (patch) | |
| tree | 64dc6b1073a7603577a3a261eb521a835b33dac6 /mm | |
| parent | 50c0ada627f56c92f5953a8bf9158b045ad026a1 (diff) | |
| download | linux-stable-11a37eb66812ce6a06b79223ad530eb0e1d7294d.tar.gz linux-stable-11a37eb66812ce6a06b79223ad530eb0e1d7294d.tar.bz2 linux-stable-11a37eb66812ce6a06b79223ad530eb0e1d7294d.zip | |
caif_virtio: fix race between virtio_device_ready() and ndo_open()
We currently depend on probe() calling virtio_device_ready() -
which happens after netdev
registration. Since ndo_open() can be called immediately
after register_netdev, this means there exists a race between
ndo_open() and virtio_device_ready(): the driver may start to use the
device (e.g. TX) before DRIVER_OK which violates the spec.
Fix this by switching to use register_netdevice() and protect the
virtio_device_ready() with rtnl_lock() to make sure ndo_open() can
only be called after virtio_device_ready().
Fixes: 0d2e1a2926b18 ("caif_virtio: Introduce caif over virtio")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220620051115.3142-3-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions