diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-03-01 12:47:58 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-03-01 12:47:58 +0100 |
commit | 55f2b78995826d549401bdf20abeac1832636bb6 (patch) | |
tree | 931b31f3b6e0879df0f9a1d58ffd040d9a652f2e /kernel | |
parent | f5c1aa1537be39d8b9bb5279b5881d81898fd3cd (diff) | |
parent | 92b9af9e4f144535c65aee673cfad309f25fa465 (diff) |
Merge branch 'x86/urgent' into x86/pat
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/user_namespace.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index 79084311ee5..076c7c8215b 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -60,12 +60,25 @@ int create_user_ns(struct cred *new) return 0; } -void free_user_ns(struct kref *kref) +/* + * Deferred destructor for a user namespace. This is required because + * free_user_ns() may be called with uidhash_lock held, but we need to call + * back to free_uid() which will want to take the lock again. + */ +static void free_user_ns_work(struct work_struct *work) { - struct user_namespace *ns; - - ns = container_of(kref, struct user_namespace, kref); + struct user_namespace *ns = + container_of(work, struct user_namespace, destroyer); free_uid(ns->creator); kfree(ns); } + +void free_user_ns(struct kref *kref) +{ + struct user_namespace *ns = + container_of(kref, struct user_namespace, kref); + + INIT_WORK(&ns->destroyer, free_user_ns_work); + schedule_work(&ns->destroyer); +} EXPORT_SYMBOL(free_user_ns); |