linux-kernel - Re: [PATCH v2 1/2] audit: add global auditd_pid to make auditd_test

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 18 Apr 2023 09:19:36 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Eiichi Tsukata <eiichi.tsukata@...anix.com>
Cc:     eparis@...hat.com, linux-kernel@...r.kernel.org,
        audit@...r.kernel.org
Subject: Re: [PATCH v2 1/2] audit: add global auditd_pid to make
 auditd_test_task() faster

On Tue, Apr 18, 2023 at 7:10 AM Eiichi Tsukata
<eiichi.tsukata@...anix.com> wrote:
>
> auditd_test_task() is a hot path of system call auditing. This patch
> introduces a global auditd_pid pid struct which can be used for faster
> check of registered audit daemon.
>
> Benchmarks
> ==========
>
> Run the following micro benchmarks:
>
>   (1) dd:
>     dd if=/dev/zero of=/dev/null bs=1 count=5M
>
>   (2) UnixBench syscall:
>     ./Run syscall -i 10 -c 1
>
> With rule:
>
>   -a never,exit -F arch=b64 -S uname
>
> Results:
>
>   (1) dd
>     Base line    : 2.572 sec
>     /w this patch: 2.418 sec (6.3% faster)
>
>   (2) UnixBench syscall Index Score
>     Base line    : 860
>     /w this patch: 953 (10.8% faster)
>
> Signed-off-by: Eiichi Tsukata <eiichi.tsukata@...anix.com>
> ---
>  kernel/audit.c | 39 +++++++++++----------------------------
>  kernel/audit.h |  4 +++-
>  2 files changed, 14 insertions(+), 29 deletions(-)
>
> diff --git a/kernel/audit.c b/kernel/audit.c
> index 9bc0b0301198..9426980368e4 100644
> --- a/kernel/audit.c
> +++ b/kernel/audit.c
> @@ -71,6 +71,7 @@ static int    audit_initialized = AUDIT_UNINITIALIZED;
>
>  u32            audit_enabled = AUDIT_OFF;
>  bool           audit_ever_enabled = !!AUDIT_OFF;
> +struct pid      *auditd_pid;

As discussed previously, I want to keep the auditd tracking PID in the
auditd_connection struct.

-- 
paul-moore.com