linux-kernel - Re: [RFC][PATCH 0/4] tracing/kprobes/uprobes: Fix race between opening probe event files and deleting probe

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Date:	Tue, 16 Jul 2013 15:38:44 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH 0/4] tracing/kprobes/uprobes: Fix race between
 opening probe event files and deleting probe

On Tue, 2013-07-16 at 21:22 +0200, Oleg Nesterov wrote:

> But tracing_open_generic_file()->trace_array_get() is racy, no?
> Somehow we need to ensure it is safe to use file / file->tr.

Ah crap. Yeah, I see what you mean. It's the race that I described with
deleting private data and using it on open. :-p


> Btw, Steven, what about other pending (and orthogonal changes) ?
> >From Jovi, from me. I see nothing new in linux-trace.git#for-next...

My INBOX is full with too much crap. I thought I grabbed the patches
from you and Jovi, but they may have been something else.

Can you just tell me what the subjects were. My INBOX currently has
>10,000 emails, and it's just getting worse.

-- Steve


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