[PATCH RFC 8/8] audit: allow user records to be created inside a container

[Eric W. Biederman]

Aristeu Rozanski <arozansk at redhat.com> writes:

> Since user events will be followed by namespace information, userspace
> can filter off undesired container records.

I don't think we want to allow any user to write to the audit records,
that is what nsown_capable will allow, as all you would need to do is to
unshare the user namespace to be able to write audit records.

Eric

> @@ -597,13 +612,13 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
>  	case AUDIT_TTY_SET:
>  	case AUDIT_TRIM:
>  	case AUDIT_MAKE_EQUIV:
> -		if (!capable(CAP_AUDIT_CONTROL))
> +		if (!nsown_capable(CAP_AUDIT_CONTROL))
>  			err = -EPERM;
>  		break;
>  	case AUDIT_USER:
>  	case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
>  	case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
> -		if (!capable(CAP_AUDIT_WRITE))
> +		if (!nsown_capable(CAP_AUDIT_WRITE))
>  			err = -EPERM;
>  		break;
>  	default:  /* bad msg */