On Tue, 2017-11-14 at 21:50 +0100, Luis R. Rodriguez wrote:
> Johannes made cfg80211 recently just use request_firmware() now via commit on
> linux-next 90a53e4432 ("cfg80211: implement regdb signature checking") [0] as
> he got tired of waiting firmware signing, but note he implemented a signature
> checking on its own so he open codes verify_pkcs7_signature() after the
> request_firmware() call. If we are happy to live with this, then so be it.
>
> [0]
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=90a53e4432b12288316efaa5f308adafb8d304b0
Johannes was tired of waiting? Commit 5a9196d "ima: add support for
measuring and appraising firmware" has been in the kernel since linux-
3.17.
The original firmware hook for verifying firmware signatures were
replaced with the common LSM pre and post kernel_read_file() hooks
in linux-4.6.y.
Even if you wanted to support firmware signature verification without
IMA-appraisal, it should be using the LSM hooks.
Mimi
