[RFC PATCH v3 05/12] fs: add security blob and hooks for block_device
casey at schaufler-ca.com
Wed Apr 22 16:55:15 UTC 2020
On 4/22/2020 9:42 AM, James Morris wrote:
> On Wed, 15 Apr 2020, deven.desai at linux.microsoft.com wrote:
>> From: Deven Bowers <deven.desai at linux.microsoft.com>
>> Add a security blob and associated allocation, deallocation and set hooks
>> for a block_device structure.
>> Signed-off-by: Deven Bowers <deven.desai at linux.microsoft.com>
> Is there any feedback from block or LSM folk on the addition of a security
> blob for block_device here?
The addition of a blob looks to have been done correctly.
As for it's use, I haven't had the chance to review the patches that
use it. I didn't see a patch that implements the hooks in a LSM,
but that could just be me.
> 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);
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