[PATCH 1/7] audit: implement generic feature setting and retrieving

[Richard Guy Briggs]

On Fri, May 24, 2013 at 12:11:44PM -0400, Eric Paris wrote:
> The audit_status structure was not designed with extensibility in mind.
> Define a new AUDIT_SET_FEATURE message type which takes a new structure
> of bits where things can be enabled/disabled/locked one at a time.  This
> structure should be able to grow in the future while maintaining forward
> and backward compatibility (based loosly on the ideas from capabilities
> and prctl)
> 
> This does not actually add any features, but is just infrastructure to
> allow new on/off types of audit system features.

However, it does surprisingly disable one!

> diff --git a/kernel/audit.c b/kernel/audit.c
> index f2f4666..3acbbc8 100644
> --- a/kernel/audit.c
> +++ b/kernel/audit.c
> @@ -699,7 +798,16 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
>  		if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
>  			err = audit_set_backlog_limit(status_get->backlog_limit);
>  		break;
> -	case AUDIT_USER:
> +	case AUDIT_GET_FEATURE:
> +		err = audit_get_feature(skb);
> +		if (err)
> +			return err;
> +		break;
> +	case AUDIT_SET_FEATURE:
> +		err = audit_set_feature(skb);
> +		if (err)
> +			return err;
> +		break;
>  	case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
>  	case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
>  		if (!audit_enabled && msg_type != AUDIT_USER_AVC)

Can I assume that the removal of the AUDIT_USER case line was
accidental?  It has broken USER type AUDIT messages.


- RGB

--
Richard Guy Briggs <rbriggs at redhat.com>
Senior Software Engineer, Kernel Security, AMER ENG Base Operating Systems, Red Hat
Remote, Ottawa, Canada
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