linux-kernel - Re: [RFC PATCH V2] tracing: Check f_dentry before accessing event_file/call in inode->i

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Message-ID: <20130723210457.GA9095@redhat.com>
Date:	Tue, 23 Jul 2013 23:04:57 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	jovi.zhangwei@...wei.com, Jiri Olsa <jolsa@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH V2] tracing: Check f_dentry before accessing
	event_file/call in inode->i_private

On 07/22, Oleg Nesterov wrote:
>
> On 07/22, Masami Hiramatsu wrote:
> >
> > (2013/07/19 22:33), Oleg Nesterov wrote:
>
> > >> OK, let me confirm that, would you mean we still need 2/4 - 4/4?
> > >
> > > Yes, yes.
> >
> > And those are depends on 1/4...
>
> Not at all or I missed something (quite possible). Just 2/4 should
> not check ->flags, of course. 3/4 looks "obviously fine", 4/4 was
> already merged.

Sorry for confusion, I meant that your a232e270dcb is already merged.

4/4 is still needed. But again, _afaics_ 2-4 can go on top of the
"tracing: open/delete fixes" series I sent, only 2/4 needs the small
update.

Oleg.

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