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virtio_pci: add check for common cfg size

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Some buggy devices, the common cfg size may not match the features.

This patch checks the common cfg size for the
features(VIRTIO_F_NOTIF_CONFIG_DATA, VIRTIO_F_RING_RESET). When the
common cfg size does not match the corresponding feature, we fail the
probe and print error message.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20231019034902.7346-1-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo
2023-10-19 11:49:02 +08:00
committed by Michael S. Tsirkin
parent fafb51a67f
commit e0592acd1e
3 changed files with 38 additions and 1 deletions
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2
drivers/virtio/virtio_pci_modern_dev.c
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@@ -296,7 +296,7 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
mdev->common = vp_modern_map_capability(mdev, common,
sizeof(struct virtio_pci_common_cfg), 4,
0, sizeof(struct virtio_pci_modern_common_cfg),
NULL, NULL);
&mdev->common_len, NULL);
if (!mdev->common)
goto err_map_common;
mdev->isr = vp_modern_map_capability(mdev, isr, sizeof(u8), 1,