diff options
Diffstat (limited to 'kernel/user.c')
| -rw-r--r-- | kernel/user.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/kernel/user.c b/kernel/user.c index add57c7e4c07..9ca2848fc356 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -62,7 +62,7 @@ static inline void uid_hash_insert(struct user_struct *up, struct hlist_head *ha static inline void uid_hash_remove(struct user_struct *up) { - hlist_del(&up->uidhash_node); + hlist_del_init(&up->uidhash_node); } static inline struct user_struct *uid_hash_find(uid_t uid, struct hlist_head *hashent) @@ -199,6 +199,30 @@ void switch_uid(struct user_struct *new_user) suid_keys(current); } +void release_uids(struct user_namespace *ns) +{ + int i; + unsigned long flags; + struct hlist_head *head; + struct hlist_node *nd; + + spin_lock_irqsave(&uidhash_lock, flags); + /* + * collapse the chains so that the user_struct-s will + * be still alive, but not in hashes. subsequent free_uid() + * will free them. + */ + for (i = 0; i < UIDHASH_SZ; i++) { + head = ns->uidhash_table + i; + while (!hlist_empty(head)) { + nd = head->first; + hlist_del_init(nd); + } + } + spin_unlock_irqrestore(&uidhash_lock, flags); + + free_uid(ns->root_user); +} static int __init uid_cache_init(void) { |