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-rw-r--r--kernel/cgroup/cgroup-v1.c2
-rw-r--r--kernel/cgroup/cgroup.c35
-rw-r--r--kernel/cgroup/cpuset.c2
3 files changed, 8 insertions, 31 deletions
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index 04d11a7dd95f..520a11cb12f4 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -802,7 +802,7 @@ void cgroup1_release_agent(struct work_struct *work)
goto out_free;
ret = cgroup_path_ns(cgrp, pathbuf, PATH_MAX, &init_cgroup_ns);
- if (ret < 0 || ret >= PATH_MAX)
+ if (ret < 0)
goto out_free;
argv[0] = agentbuf;
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 8f3cef1a4d8a..a66c088c851c 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1906,7 +1906,7 @@ int cgroup_show_path(struct seq_file *sf, struct kernfs_node *kf_node,
len = kernfs_path_from_node(kf_node, ns_cgroup->kn, buf, PATH_MAX);
spin_unlock_irq(&css_set_lock);
- if (len >= PATH_MAX)
+ if (len == -E2BIG)
len = -ERANGE;
else if (len > 0) {
seq_escape(sf, buf, " \t\n\\");
@@ -4182,20 +4182,6 @@ static struct kernfs_ops cgroup_kf_ops = {
.seq_show = cgroup_seqfile_show,
};
-/* set uid and gid of cgroup dirs and files to that of the creator */
-static int cgroup_kn_set_ugid(struct kernfs_node *kn)
-{
- struct iattr iattr = { .ia_valid = ATTR_UID | ATTR_GID,
- .ia_uid = current_fsuid(),
- .ia_gid = current_fsgid(), };
-
- if (uid_eq(iattr.ia_uid, GLOBAL_ROOT_UID) &&
- gid_eq(iattr.ia_gid, GLOBAL_ROOT_GID))
- return 0;
-
- return kernfs_setattr(kn, &iattr);
-}
-
static void cgroup_file_notify_timer(struct timer_list *timer)
{
cgroup_file_notify(container_of(timer, struct cgroup_file,
@@ -4208,25 +4194,18 @@ static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,
char name[CGROUP_FILE_NAME_MAX];
struct kernfs_node *kn;
struct lock_class_key *key = NULL;
- int ret;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
key = &cft->lockdep_key;
#endif
kn = __kernfs_create_file(cgrp->kn, cgroup_file_name(cgrp, cft, name),
cgroup_file_mode(cft),
- GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
+ current_fsuid(), current_fsgid(),
0, cft->kf_ops, cft,
NULL, key);
if (IS_ERR(kn))
return PTR_ERR(kn);
- ret = cgroup_kn_set_ugid(kn);
- if (ret) {
- kernfs_remove(kn);
- return ret;
- }
-
if (cft->file_offset) {
struct cgroup_file *cfile = (void *)css + cft->file_offset;
@@ -5629,7 +5608,9 @@ static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,
goto out_cancel_ref;
/* create the directory */
- kn = kernfs_create_dir(parent->kn, name, mode, cgrp);
+ kn = kernfs_create_dir_ns(parent->kn, name, mode,
+ current_fsuid(), current_fsgid(),
+ cgrp, NULL);
if (IS_ERR(kn)) {
ret = PTR_ERR(kn);
goto out_stat_exit;
@@ -5774,10 +5755,6 @@ int cgroup_mkdir(struct kernfs_node *parent_kn, const char *name, umode_t mode)
*/
kernfs_get(cgrp->kn);
- ret = cgroup_kn_set_ugid(cgrp->kn);
- if (ret)
- goto out_destroy;
-
ret = css_populate_dir(&cgrp->self);
if (ret)
goto out_destroy;
@@ -6316,7 +6293,7 @@ int proc_cgroup_show(struct seq_file *m, struct pid_namespace *ns,
if (cgroup_on_dfl(cgrp) || !(tsk->flags & PF_EXITING)) {
retval = cgroup_path_ns_locked(cgrp, buf, PATH_MAX,
current->nsproxy->cgroup_ns);
- if (retval >= PATH_MAX)
+ if (retval == -E2BIG)
retval = -ENAMETOOLONG;
if (retval < 0)
goto out_unlock;
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index dfbb16aca9f4..ba36c073304a 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -5092,7 +5092,7 @@ int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns,
retval = cgroup_path_ns(css->cgroup, buf, PATH_MAX,
current->nsproxy->cgroup_ns);
css_put(css);
- if (retval >= PATH_MAX)
+ if (retval == -E2BIG)
retval = -ENAMETOOLONG;
if (retval < 0)
goto out_free;