Re: [PATCH v2 1/2] capabilities: Ambient capabilities

[Lukasz Pawelczyk <l.pawelczyk@samsung.com>]

On czw, 2015-05-14 at 23:39 -0700, Andy Lutomirski wrote:
> @@ -696,10 +729,18 @@ static inline void cap_emulate_setxuid(struct cred *new, const struct cred *old)
>  	     uid_eq(old->suid, root_uid)) &&
>  	    (!uid_eq(new->uid, root_uid) &&
>  	     !uid_eq(new->euid, root_uid) &&
> -	     !uid_eq(new->suid, root_uid)) &&
> -	    !issecure(SECURE_KEEP_CAPS)) {
> -		cap_clear(new->cap_permitted);
> -		cap_clear(new->cap_effective);
> +	     !uid_eq(new->suid, root_uid))) {
> +		if (!issecure(SECURE_KEEP_CAPS)) {
> +			cap_clear(new->cap_permitted);
> +			cap_clear(new->cap_effective);
> +		}
> +
> +		/*
> +		 * Pre-ambient programs except setresuid to nonroot followed

I think you meant "expect". This typo changes the meaning of the
sentence.

> +		 * by exec to drop capabilities.  We should make sure that
> +		 * this remains the case.
> +		 */
> +		cap_clear(new->cap_ambient);
>  	}


-- 
Lukasz Pawelczyk