linux-kernel - Re: [RFC PATCH 7/7] audit: wake up kauditd

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Message-ID: <4312251.yAvT2B0k4f@sifl>
Date:	Thu, 05 Nov 2015 20:23:15 -0500
From:	Paul Moore <paul@...l-moore.com>
To:	Richard Guy Briggs <rgb@...hat.com>
Cc:	linux-audit@...hat.com, linux-kernel@...r.kernel.org,
	v.rathor@...il.com
Subject: Re: [RFC PATCH 7/7] audit: wake up kauditd_thread after auditd registers

On Thursday, October 22, 2015 02:53:20 PM Richard Guy Briggs wrote:
> When auditd is restarted, even though the kauditd_thread is present, it
> remains dormant until the next audit log message is queued.
> 
> Wake up the kauditd_thread in the kauditd_wait queue immediately when
> auditd registers its availability to drain the queue.
> 
> Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
> ---
>  kernel/audit.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)

See my 6/7 comment ... this could/should go in the auditd_register() function.

> diff --git a/kernel/audit.c b/kernel/audit.c
> index 688fa1e..369cfcc 100644
> --- a/kernel/audit.c
> +++ b/kernel/audit.c
> @@ -885,6 +885,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct
> nlmsghdr *nlh) audit_sock = skb->sk;
>  			if (!audit_pid)
>  				wake_up(&audit_backlog_wait);
> +			if (audit_pid)
> +				wake_up_interruptible(&kauditd_wait);
>  		}
>  		if (s.mask & AUDIT_STATUS_RATE_LIMIT) {
>  			err = audit_set_rate_limit(s.rate_limit);

-- 
paul moore
www.paul-moore.com

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