From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 27 Jul 2018 15:54:16 -0400
From: "Theodore Y. Ts'o" <tytso@mit.edu>
Subject: Re: [PATCH] tracing: do not leak kernel addresses
Message-ID: <20180727195416.GF13922@thunk.org>
References: <CAKwvOdk9s+=kUwcPGQzZNxR7eOGAiiasAyWhZxgKom4_6h+oxA@mail.gmail.com>
 <20180726181558.25a5c3b8@gandalf.local.home>
 <753E9YR1QhdsPhsFoYuXCwfUzfyntDrc_A93hMUkktMi7lbh3KUZMcbfqKVWUfi15zYhuiDFant-ROa4QNV5shx74ff4hGngq2BOJDv-hq4=@protonmail.ch>
 <CAG48ez1U=5nTOrnOqwMuXhdER-7XxJUYLcyYNuczwasQLQ0gXA@mail.gmail.com>
 <20180727094730.3a448629@gandalf.local.home>
 <CAKwvOdmg4DSSwy9YBccYWzc+6ZU2yKSSFmfnj72wqbYDJU0gzw@mail.gmail.com>
 <20180727143141.4b53d554@gandalf.local.home>
 <CAMx4XWv3OazvURuN1XU2+5C5tNDzPuTniMn_T=XTA4P8_uwS_A@mail.gmail.com>
 <CAG48ez25zgjTQRux_rk1fn2DUVthtK31dRU9cxE+55pBGmYjXQ@mail.gmail.com>
 <CAG48ez1MdupASE1DMt0OWXv+rqZO-2GAbfDthEQcvNXrc2pTsQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAG48ez1MdupASE1DMt0OWXv+rqZO-2GAbfDthEQcvNXrc2pTsQ@mail.gmail.com>
To: Jann Horn <jannh@google.com>
Cc: salyzyn@google.com, Steven Rostedt <rostedt@goodmis.org>, 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>
List-ID: <kernel-hardening.lists.openwall.com>

More generally, stupid question, but does Android *really* need to
have debugfs mounted?  And if so, can we figure out what facilities
that are needed and can we find some other way of meeting those
requirements?
						- Ted