netdev - Re: [PATCH v4 8/20] lsm: Refactor return value of LSM hook getprocattr

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Message-ID: <35bc63dac544edc75c25b8dc6c8c99d0@paul-moore.com>
Date: Thu, 18 Jul 2024 22:08:06 -0400
From: Paul Moore <paul@...l-moore.com>
To: Xu Kuohai <xukuohai@...weicloud.com>, bpf@...r.kernel.org, netdev@...r.kernel.org, linux-security-module@...r.kernel.org, linux-kselftest@...r.kernel.org, linux-integrity@...r.kernel.org, apparmor@...ts.ubuntu.com, selinux@...r.kernel.org
Cc: Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <martin.lau@...ux.dev>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Matt Bobrowski <mattbobrowski@...gle.com>, 
	Brendan Jackman <jackmanb@...omium.org>, James Morris <jmorris@...ei.org>, 
	"Serge E . Hallyn" <serge@...lyn.com>, Khadija Kamran <kamrankhadijadj@...il.com>, 
	Casey Schaufler <casey@...aufler-ca.com>, Ondrej Mosnacek <omosnace@...hat.com>, 
	Kees Cook <keescook@...omium.org>, John Johansen <john.johansen@...onical.com>, 
	Lukas Bulwahn <lukas.bulwahn@...il.com>, Roberto Sassu <roberto.sassu@...wei.com>, 
	Shung-Hsi Yu <shung-hsi.yu@...e.com>, Edward Cree <ecree.xilinx@...il.com>, 
	Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, 
	Trond Myklebust <trond.myklebust@...merspace.com>, Anna Schumaker <anna@...nel.org>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Stephen Smalley <stephen.smalley.work@...il.com>
Subject: Re: [PATCH v4 8/20] lsm: Refactor return value of LSM hook getprocattr

On Jul 11, 2024 Xu Kuohai <xukuohai@...weicloud.com> wrote:
> 
> To be consistent with most LSM hooks, convert the return value of
> hook getprocattr to 0 or a negative error code.
> 
> Before:
> - Hook getprocattr returns length of value on success or a negative
>   error code on failure.
> 
> After:
> - Hook getprocattr returns 0 on success or a negative error code on
>   failure. An output parameter @len is introduced to hold the
>   length of value on success.
> 
> Signed-off-by: Xu Kuohai <xukuohai@...wei.com>
> ---
>  fs/proc/base.c                |  5 ++++-
>  include/linux/lsm_hook_defs.h |  2 +-
>  include/linux/security.h      |  5 +++--
>  security/apparmor/lsm.c       |  7 +++++--
>  security/security.c           |  8 +++++---
>  security/selinux/hooks.c      | 16 +++++++++-------
>  security/smack/smack_lsm.c    | 11 ++++++-----
>  7 files changed, 33 insertions(+), 21 deletions(-)

The patch 07/20 comments also apply here.

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