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ipc: Initialize ipc_namespace->user_ns early. 

Allow the ipc namespace initialization code to depend on ns->user_ns
being set during initialization.

In particular this allows mq_init_ns to use ns->user_ns for permission
checks and initializating s_user_ns while the the mq filesystem is
being mounted.

Acked-by: Seth Forshee <seth.forshee@canonical.com>
Suggested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2016-05-31 12:26:41 -05:00
parent 8654df4e2a
commit b236017acf
1 changed files with 3 additions and 2 deletions
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5
ipc/namespace.c
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@ -34,8 +34,11 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
ns->ns.ops = &ipcns_operations;
atomic_set(&ns->count, 1);
ns->user_ns = get_user_ns(user_ns);
err = mq_init_ns(ns);
if (err) {
put_user_ns(ns->user_ns);
ns_free_inum(&ns->ns);
kfree(ns);
return ERR_PTR(err);
@ -46,8 +49,6 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
msg_init_ns(ns);
shm_init_ns(ns);
ns->user_ns = get_user_ns(user_ns);
return ns;
}