diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/device_cgroup.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/security/device_cgroup.c b/security/device_cgroup.c index 90953648c643..635a49db005d 100644 --- a/security/device_cgroup.c +++ b/security/device_cgroup.c @@ -198,13 +198,11 @@ static inline bool is_devcg_online(const struct dev_cgroup *devcg) */ static int devcgroup_online(struct cgroup *cgroup) { - struct dev_cgroup *dev_cgroup, *parent_dev_cgroup = NULL; + struct dev_cgroup *dev_cgroup = cgroup_to_devcgroup(cgroup); + struct dev_cgroup *parent_dev_cgroup = css_to_devcgroup(css_parent(&dev_cgroup->css)); int ret = 0; mutex_lock(&devcgroup_mutex); - dev_cgroup = cgroup_to_devcgroup(cgroup); - if (cgroup->parent) - parent_dev_cgroup = cgroup_to_devcgroup(cgroup->parent); if (parent_dev_cgroup == NULL) dev_cgroup->behavior = DEVCG_DEFAULT_ALLOW; @@ -394,12 +392,10 @@ static bool may_access(struct dev_cgroup *dev_cgroup, static int parent_has_perm(struct dev_cgroup *childcg, struct dev_exception_item *ex) { - struct cgroup *pcg = childcg->css.cgroup->parent; - struct dev_cgroup *parent; + struct dev_cgroup *parent = css_to_devcgroup(css_parent(&childcg->css)); - if (!pcg) + if (!parent) return 1; - parent = cgroup_to_devcgroup(pcg); return may_access(parent, ex, childcg->behavior); } @@ -524,15 +520,11 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup, char temp[12]; /* 11 + 1 characters needed for a u32 */ int count, rc = 0; struct dev_exception_item ex; - struct cgroup *p = devcgroup->css.cgroup; - struct dev_cgroup *parent = NULL; + struct dev_cgroup *parent = css_to_devcgroup(css_parent(&devcgroup->css)); if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (p->parent) - parent = cgroup_to_devcgroup(p->parent); - memset(&ex, 0, sizeof(ex)); b = buffer; |