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contrib/vhost-user-blk: fix get_config() information leak

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Refuse get_config() in excess of sizeof(struct virtio_blk_config).

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20201027173528.213464-6-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Stefan Hajnoczi 2020-10-27 17:35:21 +00:00 committed by Michael S. Tsirkin
parent f8ffcb2bda
commit 9f6df01d0e
1 changed files with 2 additions and 0 deletions
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contrib/vhost-user-blk/vhost-user-blk.c
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@ -404,6 +404,8 @@ vub_get_config(VuDev *vu_dev, uint8_t *config, uint32_t len)
VugDev *gdev;
VubDev *vdev_blk;
g_return_val_if_fail(len <= sizeof(struct virtio_blk_config), -1);
gdev = container_of(vu_dev, VugDev, parent);
vdev_blk = container_of(gdev, VubDev, parent);
memcpy(config, &vdev_blk->blkcfg, len);