linux-kernel - Re: [PATCH 2/2] integrity: Add errno field in audit message

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Date:   Wed, 17 Jun 2020 17:15:14 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     zohar@...ux.ibm.com, bauerman@...ux.ibm.com, nayna@...ux.ibm.com,
        sgrubb@...hat.com, rgb@...hat.com, linux-integrity@...r.kernel.org,
        linux-audit@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] integrity: Add errno field in audit message

On Wed, Jun 17, 2020 at 4:44 PM Lakshmi Ramasubramanian
<nramas@...ux.microsoft.com> wrote:
>
> Error code is not included in the audit messages logged by
> the integrity subsystem. Add "errno" field in the audit messages
> logged by the integrity subsystem and set the value to the error code
> passed to integrity_audit_msg() in the "result" parameter.
>
> Sample audit messages:
>
> [    6.284329] audit: type=1804 audit(1591756723.627:2): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=kernel op=add_boot_aggregate cause=alloc_entry comm="swapper/0" name="boot_aggregate" res=0 errno=-12
>
> [    8.085456] audit: type=1802 audit(1592005947.297:9): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=policy_update cause=completed comm="systemd" res=1 errno=0
>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
> Suggested-by: Steve Grubb <sgrubb@...hat.com>
> ---
>  security/integrity/integrity_audit.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Paul Moore <paul@...l-moore.com>

> diff --git a/security/integrity/integrity_audit.c b/security/integrity/integrity_audit.c
> index 5109173839cc..a265024f82f3 100644
> --- a/security/integrity/integrity_audit.c
> +++ b/security/integrity/integrity_audit.c
> @@ -53,6 +53,6 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
>                 audit_log_untrustedstring(ab, inode->i_sb->s_id);
>                 audit_log_format(ab, " ino=%lu", inode->i_ino);
>         }
> -       audit_log_format(ab, " res=%d", !result);
> +       audit_log_format(ab, " res=%d errno=%d", !result, result);
>         audit_log_end(ab);
>  }
> --
> 2.27.0

-- 
paul moore
www.paul-moore.com