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-rw-r--r--security/device_cgroup.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 7bd296c..46f2397 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -508,12 +508,11 @@ int devcgroup_inode_permission(struct inode *inode, int mask)
return 0;
if (!S_ISBLK(inode->i_mode) && !S_ISCHR(inode->i_mode))
return 0;
- dev_cgroup = css_to_devcgroup(task_subsys_state(current,
- devices_subsys_id));
- if (!dev_cgroup)
- return 0;
rcu_read_lock();
+
+ dev_cgroup = task_devcgroup(current);
+
list_for_each_entry_rcu(wh, &dev_cgroup->whitelist, list) {
if (wh->type & DEV_ALL)
goto acc_check;
@@ -533,6 +532,7 @@ acc_check:
rcu_read_unlock();
return 0;
}
+
rcu_read_unlock();
return -EPERM;
@@ -543,12 +543,10 @@ int devcgroup_inode_mknod(int mode, dev_t dev)
struct dev_cgroup *dev_cgroup;
struct dev_whitelist_item *wh;
- dev_cgroup = css_to_devcgroup(task_subsys_state(current,
- devices_subsys_id));
- if (!dev_cgroup)
- return 0;
-
rcu_read_lock();
+
+ dev_cgroup = task_devcgroup(current);
+
list_for_each_entry(wh, &dev_cgroup->whitelist, list) {
if (wh->type & DEV_ALL)
goto acc_check;
@@ -566,6 +564,8 @@ acc_check:
rcu_read_unlock();
return 0;
}
+
rcu_read_unlock();
+
return -EPERM;
}