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Change History

In the Linux kernel, the following vulnerability has been resolved:

virtio-pci: Check if is_avq is NULL

[bug]
In the virtio_pci_common.c function vp_del_vqs, vp_dev->is_avq is involved
to determine whether it is admin virtqueue, but this function vp_dev->is_avq
 may be empty. For installations, virtio_pci_legacy does not assign a value
 to vp_dev->is_avq.

[fix]
Check whether it is vp_dev->is_avq before use.

[test]
Test with virsh Attach device
Before this patch, the following command would c

kernel.org https://git.kernel.org/stable/c/5e2024b0b9b3d5709e3f7e9b92951d7e29154106 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c8fae27d141a32a1624d0d0d5419d94252824498 [No types assigned]