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authorEric W. Biederman <ebiederm@xmission.com>2016-05-31 20:26:41 +0300
committerEric W. Biederman <ebiederm@xmission.com>2016-06-23 23:41:53 +0300
commitb236017acffa73d52eac9427f42d8993067d20fb (patch)
tree02dd39ff4a5e38f15f6f708a46d8034a23ebb0d8 /ipc
parent8654df4e2ac9704905198d63845554c2ddf6a93f (diff)
downloadlinux-b236017acffa73d52eac9427f42d8993067d20fb.tar.xz
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>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/namespace.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 068caf18d565..04cb07eb81f1 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -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;
}