vfio/pci: Clear error and request eventfd ctx after releasing
[ Upstream commit 5c5866c593bbd444d0339ede6a8fb5f14ff66d72 ] The next use of the device will generate an underflow from the stale reference. Cc: Qian Cai <cai@lca.pw> Fixes: 1518ac272e78 ("vfio/pci: fix memory leaks of eventfd ctx") Reported-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Tested-by: Daniel Wagner <dwagner@suse.de> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -474,10 +474,14 @@ static void vfio_pci_release(void *device_data)
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if (!(--vdev->refcnt)) {
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vfio_spapr_pci_eeh_release(vdev->pdev);
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vfio_pci_disable(vdev);
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if (vdev->err_trigger)
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if (vdev->err_trigger) {
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eventfd_ctx_put(vdev->err_trigger);
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if (vdev->req_trigger)
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vdev->err_trigger = NULL;
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}
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if (vdev->req_trigger) {
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eventfd_ctx_put(vdev->req_trigger);
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vdev->req_trigger = NULL;
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}
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}
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mutex_unlock(&vdev->reflck->lock);
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