linux-kernel - Re: [PATCH v2.1] audit: Only use the syscall slowpath when syscall audit rules exist

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]

Message-ID: <1391607995.13157.24.camel@localhost>
Date:	Wed, 05 Feb 2014 14:46:35 +0100
From:	Eric Paris <eparis@...hat.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	linux-audit@...hat.com, linux-kernel@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Steve Grubb <sgrubb@...hat.com>
Subject: Re: [PATCH v2.1] audit: Only use the syscall slowpath when syscall
 audit rules exist

On Mon, 2014-02-03 at 11:11 -0800, Andy Lutomirski wrote:

> +void audit_inc_n_rules()
> +{
> +	struct task_struct *p, *g;
> +	unsigned long flags;
> +
> +	read_lock_irqsave(&tasklist_lock, flags);
> +	if (audit_n_rules++ == 0) {

I know it's right, but it's too clever for me  :)  If we do end up
adding something like this Can we just do:
   if (!audit_n_rules) {}
   audit_n_rules++

I like dumb code   :)

> +		do_each_thread(g, p) {
> +			if (p->audit_context)
> +				set_tsk_thread_flag(p, TIF_SYSCALL_AUDIT);
> +		} while_each_thread(g, p);
> +	}
> +	read_unlock_irqrestore(&tasklist_lock, flags);
> +}

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/