linux

iv/linux

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Li Zhang 5e2024b0b9 virtio-pci: Check if is_avq is NULL

[ Upstream commit c8fae27d141a32a1624d0d0d5419d94252824498 ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-07-11 12:51:07 +02:00

Kconfig

virtio-pci: Initialize the supported admin commands

2023-12-19 11:51:32 -07:00

Makefile

virtio-pci: Introduce APIs to execute legacy IO admin commands

2023-12-19 11:51:33 -07:00

virtio_anchor.c

virtio: replace restricted mem access flag with callback

2022-08-01 07:42:49 +02:00

virtio_balloon.c

virtio_balloon: Give the balloon its own wakeup source