Re: [RFC PATCH v3 05/12] fs: add security blob and hooks for block_device

[James Morris]

On Wed, 15 Apr 2020, deven.desai@xxxxxxxxxxxxxxxxxxx wrote:

> From: Deven Bowers <deven.desai@xxxxxxxxxxxxxxxxxxx>
> 
> Add a security blob and associated allocation, deallocation and set hooks
> for a block_device structure.
> 
> Signed-off-by: Deven Bowers <deven.desai@xxxxxxxxxxxxxxxxxxx>

Is there any feedback from block or LSM folk on the addition of a security 
blob for block_device here?

IPE uses this is to track the status of integrity verification of e.g. 
DM-Verity devices, per this code from a subsequent patch:


+       ret = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev,
+                                       DM_VERITY_SIGNATURE_SEC_NAME,
+                                       v->sig->sig, v->sig->sig_size);


-- 
James Morris
<jmorris@xxxxxxxxx>