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From: Steven Rostedt <rostedt@goodmis.org>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: Jann Horn <jannh@google.com>,
	salyzyn@google.com, Nick Desaulniers <ndesaulniers@google.com>,
	Golden_Miller83@protonmail.ch, Greg KH <greg@kroah.com>,
	Kees Cook <keescook@google.com>,
	salyzyn@android.com, kernel list <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	kernel-team@android.com, stable@vger.kernel.org,
	Kernel Hardening <kernel-hardening@lists.openwall.com>,
	Jeffrey Vander Stoep <jeffv@google.com>
Subject: Re: [PATCH] tracing: do not leak kernel addresses
Date: Fri, 27 Jul 2018 16:53:11 -0400	[thread overview]
Message-ID: <20180727165311.48b33a3f@gandalf.local.home> (raw)
In-Reply-To: <20180727202114.GH13922@thunk.org>

On Fri, 27 Jul 2018 16:21:14 -0400
"Theodore Y. Ts'o" <tytso@mit.edu> wrote:

> On Fri, Jul 27, 2018 at 04:11:03PM -0400, Steven Rostedt wrote:
> > That said, I would assume that
> > other Android utilities are using other debugfs files for system
> > status and such.  
> 
> Yeah, I know we probably have lost the "debugfs is only for debugging
> and has no place in a production system" battle, and we should just
> move on and assume we need to completely harden all of debugfs.  But
> it's worth at least *asking* whether or not the use of debugfs for
> Android can be avoided....

Perhaps we should have a way to disable directories in debugfs at boot?
That way, people can only have what is needed. The reason I created
tracefs, is because I was asked to so that tracing utilities could be
enabled without bringing in all of debugfs itself. But now it appears
there's more there that makes it have to be mounted.

-- Steve

  reply	other threads:[~2018-07-27 20:53 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-25 20:22 [PATCH] tracing: do not leak kernel addresses Mark Salyzyn
2018-07-25 21:14 ` Nick Desaulniers
2018-07-26  1:07 ` Steven Rostedt
2018-07-26 15:14   ` Mark Salyzyn
2018-07-26 15:22     ` Steven Rostedt
2018-07-26 16:32       ` Nick Desaulniers
2018-07-26 16:37         ` Steven Rostedt
2018-07-26 16:59           ` Nick Desaulniers
2018-07-26 21:56             ` Nick Desaulniers
2018-07-26 15:31     ` Greg KH
2018-07-26 16:52       ` Nick Desaulniers
2018-07-26 22:15         ` Steven Rostedt
2018-07-27 12:07           ` Jordan Glover
2018-07-27 13:40             ` Jann Horn
2018-07-27 13:47               ` Steven Rostedt
2018-07-27 18:13                 ` Nick Desaulniers
2018-07-27 18:31                   ` Steven Rostedt
     [not found]                     ` <CAMx4XWv3OazvURuN1XU2+5C5tNDzPuTniMn_T=XTA4P8_uwS_A@mail.gmail.com>
2018-07-27 18:47                       ` Jann Horn
2018-07-27 18:58                         ` Jann Horn
2018-07-27 19:54                           ` Theodore Y. Ts'o
2018-07-27 20:11                             ` Steven Rostedt
2018-07-27 20:21                               ` Theodore Y. Ts'o
2018-07-27 20:53                                 ` Steven Rostedt [this message]
2018-07-27 22:05                                 ` Sandeep Patil
2018-07-28  0:04                                   ` Theodore Y. Ts'o
2018-07-30 14:35                                     ` Sandeep Patil

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