Merge tag 'vfio-v5.8-rc7' of git://github.com/awilliam/linux-vfio into master (4fa640dc) · Commits · 戴 / test

Pull VFIO fix from Alex Williamson: "Fix race with eventfd ctx cleared outside of mutex (Zeng Tao)" * tag 'vfio-v5.8-rc7' of git://github.com/awilliam/linux-vfio: vfio/pci: fix racy on error and request eventfd ctx

drivers/vfio/pci/vfio_pci.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -521,14 +521,19 @@ 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);
		mutex_lock(&vdev->igate);
		if (vdev->err_trigger) {
		eventfd_ctx_put(vdev->err_trigger);
		vdev->err_trigger = NULL;
		}
		mutex_unlock(&vdev->igate);

		mutex_lock(&vdev->igate);
		if (vdev->req_trigger) {
		eventfd_ctx_put(vdev->req_trigger);
		vdev->req_trigger = NULL;
		}
		mutex_unlock(&vdev->igate);
		}

		mutex_unlock(&vdev->reflck->lock);

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