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author | Ingo Molnar <mingo@elte.hu> | 2009-03-04 02:29:19 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-03-04 02:29:19 +0100 |
commit | 91d75e209bd59695f0708d66964d928d45b3b2f3 (patch) | |
tree | 32cab1359d951e4193bebb181a0f0319824a2b95 /kernel/user_namespace.c | |
parent | 9976b39b5031bbf76f715893cf080b6a17683881 (diff) | |
parent | 8b0e5860cb099d7958d13b00ffbc35ad02735700 (diff) | |
download | kernel-crypto-91d75e209bd59695f0708d66964d928d45b3b2f3.tar.gz kernel-crypto-91d75e209bd59695f0708d66964d928d45b3b2f3.tar.xz kernel-crypto-91d75e209bd59695f0708d66964d928d45b3b2f3.zip |
Merge branch 'x86/core' into core/percpu
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 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); |