diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2009-03-11 10:49:34 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-11 10:49:34 +0100 |
| commit | d95c3578120e5bc4784069439f00ccb1b5f87717 (patch) | |
| tree | c819de31de3983f3d69f223ede07667ff23bf7da /kernel/user_namespace.c | |
| parent | fix warning in arch/x86/kernel/cpu/intel_cacheinfo.c (diff) | |
| parent | Merge branches 'x86/cleanups', 'x86/kexec', 'x86/mce2' and 'linus' into x86/core (diff) | |
| download | wireguard-linux-d95c3578120e5bc4784069439f00ccb1b5f87717.tar.xz wireguard-linux-d95c3578120e5bc4784069439f00ccb1b5f87717.zip | |
Merge branch 'x86/core' into cpus4096
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); |