linux-kernel - Re: [PATCH v2 0/2] lsm: Improve LSM hooks documentation

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Date:   Tue, 29 Nov 2022 08:48:45 -0800
From:   Casey Schaufler <casey@...aufler-ca.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>, paul@...l-moore.com,
        omosnace@...hat.com, john.johansen@...onical.com,
        kpsingh@...nel.org
Cc:     bpf@...r.kernel.org, linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Roberto Sassu <roberto.sassu@...wei.com>,
        casey@...aufler-ca.com
Subject: Re: [PATCH v2 0/2] lsm: Improve LSM hooks documentation

On 11/28/2022 6:42 AM, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>

For the series:

Reviewed-by: Casey Schaufler <casey@...aufler-ca.com>

>
> The recent discussion about return values from LSM hooks, available here:
>
> https://lore.kernel.org/bpf/20221115175652.3836811-1-roberto.sassu@huaweicloud.com/
>
> motivated revisiting the documentation in include/linux/lsm_hooks.h, to
> ensure that it is complete and accurate. It was also a good occasion to fix
> discovered formatting issues.
>
> Changelog:
>
> v1 (security: Ensure LSMs return expected values):
> - A positive value, not only 1 can cause cap_set_admin to be set when
>   calling __vm_enough_memory() (reported by Paul)
> - Improve description of the vm_enough_memory hook
> - Remove documentation of the sb_add_mnt_opt hook, as it was removed
>   (reported by Paul)
> - Add more periods in the parameters description
> - Adjust mmap_addr and mmap_file semicolon
> - Move description of gfp parameter of xfrm_policy_alloc_security together
>   with the others
> - Add missing return value description for binder_transaction,
>   binder_transfer_binder, binder_transfer_file, quotactl and quota_on
> - Improve return value description for sb_eat_lsm_opts, sb_show_options,
>   dentry_init_security, dentry_create_files_as and sctp_assoc_established
>
> Roberto Sassu (2):
>   lsm: Clarify documentation of vm_enough_memory hook
>   lsm: Add/fix return values in lsm_hooks.h and fix formatting
>
>  include/linux/lsm_hooks.h | 227 ++++++++++++++++++++++++--------------
>  1 file changed, 143 insertions(+), 84 deletions(-)
>