diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2009-03-02 22:08:56 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-02 22:08:56 +0100 |
| commit | c02368a9d059322f913a58111eade87a656fefd5 (patch) | |
| tree | 2f02dbbe69b86535f58d2010d9adfb20a9c16fb9 /kernel/user_namespace.c | |
| parent | irq: name 'p' variables a bit better (diff) | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 (diff) | |
| download | wireguard-linux-c02368a9d059322f913a58111eade87a656fefd5.tar.xz wireguard-linux-c02368a9d059322f913a58111eade87a656fefd5.zip | |
Merge branch 'linus' into irq/genirq
Diffstat (limited to 'kernel/user_namespace.c')
| -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 79084311ee57..076c7c8215b0 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); |