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-rw-r--r--kernel/user_namespace.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 7d87017a0040..58c67e5f851c 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -31,7 +31,6 @@ static bool new_idmap_permitted(const struct file *file,
struct uid_gid_map *map);
static void free_user_ns(struct work_struct *work);
-
static void set_cred_user_ns(struct cred *cred, struct user_namespace *user_ns)
{
/* Start with the same capabilities as init but useless for doing
@@ -64,13 +63,15 @@ int create_user_ns(struct cred *new)
struct user_namespace *ns, *parent_ns = new->user_ns;
kuid_t owner = new->euid;
kgid_t group = new->egid;
+ struct ucounts *ucounts;
int ret;
ret = -EUSERS;
if (parent_ns->level > 32)
goto fail;
- if (!inc_user_namespaces(parent_ns))
+ ucounts = inc_user_namespaces(parent_ns, owner);
+ if (!ucounts)
goto fail;
/*
@@ -110,6 +111,7 @@ int create_user_ns(struct cred *new)
ns->group = group;
INIT_WORK(&ns->work, free_user_ns);
ns->max_user_namespaces = INT_MAX;
+ ns->ucounts = ucounts;
/* Inherit USERNS_SETGROUPS_ALLOWED from our parent */
mutex_lock(&userns_state_mutex);
@@ -133,7 +135,7 @@ fail_keyring:
fail_free:
kmem_cache_free(user_ns_cachep, ns);
fail_dec:
- dec_user_namespaces(parent_ns);
+ dec_user_namespaces(ucounts);
fail:
return ret;
}
@@ -164,6 +166,7 @@ static void free_user_ns(struct work_struct *work)
container_of(work, struct user_namespace, work);
do {
+ struct ucounts *ucounts = ns->ucounts;
parent = ns->parent;
retire_userns_sysctls(ns);
#ifdef CONFIG_PERSISTENT_KEYRINGS
@@ -171,7 +174,7 @@ static void free_user_ns(struct work_struct *work)
#endif
ns_free_inum(&ns->ns);
kmem_cache_free(user_ns_cachep, ns);
- dec_user_namespaces(parent);
+ dec_user_namespaces(ucounts);
ns = parent;
} while (atomic_dec_and_test(&parent->count));
}