> -----Original Message----- > From: Andrew Morton <a...@linux-foundation.org> > Sent: Thursday, November 8, 2018 6:38 AM > To: chouryzhou(周威) <chouryz...@tencent.com> > Cc: gre...@linuxfoundation.org; a...@android.com; tk...@android.com; > d...@stgolabs.net; de...@driverdev.osuosl.org; linux-kernel@vger.kernel.org > Subject: Re: [PATCH V2] binder: ipc namespace support for android > binder > > On Wed, 7 Nov 2018 01:48:12 +0000 chouryzhou(周威) > <chouryz...@tencent.com> wrote: > > > > > --- a/ipc/namespace.c > > > > +++ b/ipc/namespace.c > > > > @@ -56,6 +56,9 @@ static struct ipc_namespace *create_ipc_ns(struct > > > user_namespace *user_ns, > > > > ns->ucounts = ucounts; > > > > > > > > err = mq_init_ns(ns); > > > > + if (err) > > > > + goto fail_put; > > > > + err = binder_init_ns(ns); > > > > if (err) > > > > goto fail_put; > > > > > > > > > > Don't we need an mq_put_mnt() if binder_init_ns() fails? > > > > > > free_ipc_ns() seems to have forgotten about that too. In which case it > > > must be madly leaking mounts so probably I'm wrong. Confused. > > > > > > > mq_init_ns will do clean job if it failed, and as do binder_init_ns. > > My point is that if mq_init_ns() succeeds and binder_init_ns() fails, > we don't undo the effects of mq_init_ns()?
Oh, mq_put_mnt is called in put_ipc_ns. We should invoke put_ipc_ns if binder_init_ns fails. I will update the patch soon. Thank you very much for pointing out the issue.
