Re: [PATCH V4 07/10] capabilities: remove a layer of conditional logic

Remove a layer of conditional logic to make the use of conditions easier to read and analyse. 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 | 23 ++++++++++------------- 1 files changed, 10 insertions(+), 13 deletions(-) diff --git a/security/commoncap.c b/security/commoncap.c index eae7431..cf95d73 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -543,13 +543,12 @@ static inline bool nonroot_raised_pE(struct cred *cred, kuid_t root) { bool ret = false; - if (__cap_grew(effective, ambient, cred)) { - if (!__cap_full(effective, cred) || - !__is_eff(root, cred) || !__is_real(root, cred) || - !root_privileged()) { - ret = true; - } - } + if (__cap_grew(effective, ambient, cred) && + (!__cap_full(effective, cred) || + !__is_eff(root, cred) || + !__is_real(root, cred) || + !root_privileged())) + ret = true; return ret; } @@ -643,13 +642,11 @@ int cap_bprm_set_creds(struct linux_binprm *bprm) /* Check for privilege-elevated exec. */ bprm->cap_elevated = 0; - if (is_setid) { + if (is_setid || + (!__is_real(root_uid, new) && + (effective || + __cap_grew(permitted, ambient, new)))) bprm->cap_elevated = 1; - } else if (!__is_real(root_uid, new)) { - if (effective || - __cap_grew(permitted, ambient, new)) - bprm->cap_elevated = 1; - } return 0; } -- 1.7.1