Re: [PATCH V4 04/10] capabilities: use root_priveleged inline to clarify logic

Introduce inline root_privileged() to make use of SECURE_NONROOT easier to read. Suggested-by: Serge Hallyn <serge(a)hallyn.com&gt; Signed-off-by: Richard Guy Briggs <rgb(a)redhat.com&gt; Reviewed-by: Serge Hallyn <serge(a)hallyn.com&gt; Acked-by: James Morris <james.l.morris(a)oracle.com&gt; --- security/commoncap.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/security/commoncap.c b/security/commoncap.c index 623f251..1904f49 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -472,14 +472,14 @@ static int get_file_caps(struct linux_binprm *bprm, bool *effective, bool *has_f return rc; } +static inline bool root_privileged(void) { return !issecure(SECURE_NOROOT); } + static void handle_privileged_root(struct linux_binprm *bprm, bool has_fcap, bool *effective, kuid_t root_uid) { const struct cred *old = current_cred(); struct cred *new = bprm->cred; - if (issecure(SECURE_NOROOT)) - return;

/* * If the legacy file capability is set, then don't set privs * for a setuid root binary run by a non-root user. Do set it @@ -536,7 +536,8 @@ int cap_bprm_set_creds(struct linux_binprm *bprm) root_uid = make_kuid(new->user_ns, 0); - handle_privileged_root(bprm, has_fcap, &effective, root_uid); + if (root_privileged()) + handle_privileged_root(bprm, has_fcap, &effective, root_uid); /* if we have fs caps, clear dangerous personality flags */ if (__cap_gained(permitted, new, old)) @@ -602,7 +603,7 @@ int cap_bprm_set_creds(struct linux_binprm *bprm) if (__cap_grew(effective, ambient, new)) { if (!__cap_full(effective, new) || !uid_eq(new->euid, root_uid) || !uid_eq(new->uid, root_uid) || - issecure(SECURE_NOROOT)) { + !root_privileged()) { ret = audit_log_bprm_fcaps(bprm, new, old); if (ret < 0) return ret; -- 1.7.1