In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
virtio: rtc: tear down old virtqueues before restore<\/p>\n
virtio_device_restore() resets the device and restores the negotiated
\nfeatures before calling ->restore(). viortc_freeze() intentionally
\nleaves the existing virtqueues in place so the alarm queue can still
\nwake the system, but viortc_restore() immediately calls
\nviortc_init_vqs() without first deleting those old queues.<\/p>\n
If virtqueue reinitialization fails on virtio-pci, the transport error
\npath can run vp_del_vqs() against a newly allocated vp_dev->vqs array
\nwhile vdev->vqs still contains the old virtqueues. vp_del_vqs() then
\nlooks up queue state through the new array and can dereference a NULL
\ninfo pointer in vp_del_vq(), crashing the guest kernel during restore.<\/p>\n
This can also happen during a non-faulty reinitialization, when one of
\nthe vp_find_vqs_msix() attempts is unsuccessful before a later attempt
\nwould succeed.<\/p>\n
Delete the stale virtqueues before rebuilding them. If restore fails
\nbefore virtio_device_ready(), reuse the remove path to stop the device.
\nOnce the device is ready, return errors directly instead of deleting the
\nvirtqueues again.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
virtio: rtc: tear down old virtqueues before restore<\/p>\n
virtio_device_restore() resets the device and restores the negotiated
\nfeature<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7254","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7254","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}