linux-kernel - Re: [PATCH v3 00/10] Enable root to update the blacklist keyring

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Date:   Fri, 15 Jan 2021 11:28:35 +0200
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Mickaël Salaün <mic@...ikod.net>
Cc:     David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        "David S . Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        James Morris <jmorris@...ei.org>,
        Mickaël Salaün <mic@...ux.microsoft.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        "Serge E . Hallyn" <serge@...lyn.com>, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH v3 00/10] Enable root to update the blacklist keyring

On Thu, Jan 14, 2021 at 04:18:59PM +0100, Mickaël Salaün wrote:
> This third patch series includes back three fix patches taken from the first
> series (and cherry-picked from David Howells's tree [1]), and one cosmetic fix
> from Alex Shi which helps avoid future conflicts.  I also added some Acked-by
> and improved comments.  As requested, this series is based on v5.11-rc3.
> 
> The goal of these patches is to add a new configuration option to enable the
> root user to load signed keys in the blacklist keyring.  This keyring is useful
> to "untrust" certificates or files.  Enabling to safely update this keyring
> without recompiling the kernel makes it more usable.
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=keys-fixes
> 
> Previous patch series:
> https://lore.kernel.org/lkml/20201211190330.2586116-1-mic@digikod.net/
> 
> Regards,
> 
> Alex Shi (1):
>   certs/blacklist: fix kernel doc interface issue
> 
> David Howells (1):
>   certs: Fix blacklist flag type confusion
> 
> Mickaël Salaün (8):
>   certs: Fix blacklisted hexadecimal hash string check
>   PKCS#7: Fix missing include
>   certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID
>   certs: Make blacklist_vet_description() more strict
>   certs: Factor out the blacklist hash creation
>   certs: Check that builtin blacklist hashes are valid
>   certs: Allow root user to append signed hashes to the blacklist
>     keyring
>   tools/certs: Add print-cert-tbs-hash.sh
> 
>  MAINTAINERS                                   |   2 +
>  certs/.gitignore                              |   1 +
>  certs/Kconfig                                 |  10 +
>  certs/Makefile                                |  15 +-
>  certs/blacklist.c                             | 217 ++++++++++++++----
>  certs/system_keyring.c                        |   5 +-
>  crypto/asymmetric_keys/x509_public_key.c      |   3 +-
>  include/keys/system_keyring.h                 |  14 +-
>  include/linux/key.h                           |   1 +
>  include/linux/verification.h                  |   2 +
>  scripts/check-blacklist-hashes.awk            |  37 +++
>  security/integrity/ima/ima_mok.c              |   4 +-
>  .../platform_certs/keyring_handler.c          |  26 +--
>  security/keys/key.c                           |   2 +
>  tools/certs/print-cert-tbs-hash.sh            |  91 ++++++++
>  15 files changed, 345 insertions(+), 85 deletions(-)
>  create mode 100755 scripts/check-blacklist-hashes.awk
>  create mode 100755 tools/certs/print-cert-tbs-hash.sh
> 
> 
> base-commit: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
> -- 
> 2.30.0
> 
> 

Thank you. Unfortunately no time to review this anymore this week but I
sanity checked that this applies cleanly now, so should be easy to get on
testing this series next week:

$ git-pw series apply 414691
Applying: certs/blacklist: fix kernel doc interface issue
Applying: certs: Fix blacklisted hexadecimal hash string check
Applying: PKCS#7: Fix missing include
Applying: certs: Fix blacklist flag type confusion
Applying: certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID
Applying: certs: Make blacklist_vet_description() more strict
Applying: certs: Factor out the blacklist hash creation
Applying: certs: Check that builtin blacklist hashes are valid
Applying: certs: Allow root user to append signed hashes to the blacklist keyring
Applying: tools/certs: Add print-cert-tbs-hash.sh

/Jarkko