On Mon, Jul 05, 2021 at 06:00:06PM +0800, Xie Yongji wrote: > 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@xxxxxxxxxxxxx> I replied on v3. Silently ignoring what hypervisor said is not a good idea. > --- > 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 e4bd3b1fc3c2..e9d7747c3cc0 100644 > --- a/drivers/block/virtio_blk.c > +++ b/drivers/block/virtio_blk.c > @@ -819,7 +819,7 @@ 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 >= SECTOR_SIZE && blk_size <= PAGE_SIZE) > blk_queue_logical_block_size(q, blk_size); > else > blk_size = queue_logical_block_size(q); > -- > 2.11.0
