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vfio/pci: Clear error and request eventfd ctx after releasing

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The next use of the device will generate an underflow from the
stale reference.

Cc: Qian Cai <[email protected]>
Fixes: 1518ac272e ("vfio/pci: fix memory leaks of eventfd ctx")
Reported-by: Daniel Wagner <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Tested-by: Daniel Wagner <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
This commit is contained in:
Alex Williamson committed 2020-06-17 15:18:42 -06:00
1 parent b3a9e3b962
commit 5c5866c593
1 file changed
+6 -2
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drivers/vfio/pci/vfio_pci.c
+6 -2
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@@ -521,10 +521,14 @@ static void vfio_pci_release(void *device_data)
vfio_pci_vf_token_user_add(vdev, -1);
vfio_spapr_pci_eeh_release(vdev->pdev);
vfio_pci_disable(vdev);
if (vdev->err_trigger)
if (vdev->err_trigger) {
eventfd_ctx_put(vdev->err_trigger);
if (vdev->req_trigger)
vdev->err_trigger = NULL;
}
if (vdev->req_trigger) {
eventfd_ctx_put(vdev->req_trigger);
vdev->req_trigger = NULL;
}
}
mutex_unlock(&vdev->reflck->lock);