Messages in this thread Patch in this message | | | From | Xie Yongji <> | Subject | [PATCH v7 04/12] virtio-blk: Add validation for block size in config space | Date | Mon, 17 May 2021 17:55:05 +0800 |
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This ensures that we will not use an invalid block size in config space (might come from an untrusted device).
Signed-off-by: Xie Yongji <xieyongji@bytedance.com> --- drivers/block/virtio_blk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index ebb4d3fe803f..c848aa36d49b 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -826,7 +826,7 @@ static int virtblk_probe(struct virtio_device *vdev) err = virtio_cread_feature(vdev, VIRTIO_BLK_F_BLK_SIZE, struct virtio_blk_config, blk_size, &blk_size); - if (!err) + if (!err && blk_size > 0 && blk_size <= max_size) blk_queue_logical_block_size(q, blk_size); else blk_size = queue_logical_block_size(q); -- 2.11.0
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