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| author | Li Zhang <zhanglikernel@gmail.com> | 2024-03-16 13:25:54 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-05-22 08:39:41 -0400 |
| commit | c8fae27d141a32a1624d0d0d5419d94252824498 (patch) | |
| tree | de050c966953c6a0ee689055db7e60e516bb1eb1 | |
| parent | c0a7233f583f9aa53b5066785201746cdcd8fd24 (diff) | |
| download | linux-c8fae27d141a32a1624d0d0d5419d94252824498.tar.gz linux-c8fae27d141a32a1624d0d0d5419d94252824498.tar.bz2 linux-c8fae27d141a32a1624d0d0d5419d94252824498.zip | |
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 crash the guest system
After applying the patch, everything seems to be working fine.
Signed-off-by: Li Zhang <zhanglikernel@gmail.com>
Message-Id: <1710566754-3532-1-git-send-email-zhanglikernel@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/virtio/virtio_pci_common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 584af7816532..f6b0b00e4599 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -236,7 +236,7 @@ void vp_del_vqs(struct virtio_device *vdev) int i; list_for_each_entry_safe(vq, n, &vdev->vqs, list) { - if (vp_dev->is_avq(vdev, vq->index)) + if (vp_dev->is_avq && vp_dev->is_avq(vdev, vq->index)) continue; if (vp_dev->per_vq_vectors) { |