From: William Roberts <bill.c.roberts@gmail.com>
To: Stephen Smalley <stephen.smalley.work@gmail.com>
Cc: Ulrich Drepper <drepper@redhat.com>,
Ondrej Mosnacek <omosnace@redhat.com>,
Stephen Smalley <sds@tycho.nsa.gov>,
Petr Lautrbach <plautrba@redhat.com>,
SElinux list <selinux@vger.kernel.org>
Subject: Re: Annotate Deprecated Functions in libselinux
Date: Thu, 27 Feb 2020 15:34:41 -0600 [thread overview]
Message-ID: <CAFftDdqtjac92yfbumnGXjfa4tba3ghN0WBqbn9dM7myhjQ4Nw@mail.gmail.com> (raw)
In-Reply-To: <CAEjxPJ7aR_bd79yQMb+KwJUZBMkOFRfntgqjDpTh1zrV5nw4sw@mail.gmail.com>
On Thu, Feb 27, 2020 at 3:31 PM Stephen Smalley
<stephen.smalley.work@gmail.com> wrote:
>
> On Thu, Feb 27, 2020 at 4:19 PM William Roberts
> <bill.c.roberts@gmail.com> wrote:
> >
> > On Thu, Feb 27, 2020 at 3:11 PM Stephen Smalley
> > <stephen.smalley.work@gmail.com> wrote:
> > > That just controls what is exported. The hidden_proto/hidden_def
> > > stuff is to ensure that when libselinux calls one of its own exported
> > > symbols, that symbol resolves to the actual libselinux implementation
> > > and not something provided by some other DSO earlier in the search
> > > path, which is otherwise possible.
> >
> > Sure, but do we actually care about that?
> >
> > If we actually do care, we could throw a script in the build to make sure
> > anything in the linker script map is not used internally.
> >
> > Right now, all this DSO hygiene and look up protection is opt-in, which
> > usually always results in missed cases. With the linker script, it's opt-out,
> > which is usually always how you want to do things.
>
> There are lots of cases where libselinux calls one of its own exported
> symbols, so you can't just prohibit that.
> -fno-semantic-interposition sounds like the right solution to me, and
> appears to be the default in clang.
Interesting to note.
> Dropping the hidden_def/hidden_proto stuff without enabling
> -fno-semantic-interposition could potentially break because
> libselinux could suddenly start using some external implementation of
> one of its own functions.
Conjecture.
> Adding a map file and defaulting to hidden visibility would be a good
> idea but is separate.
IIUC, not really, the current code attempts to limit our exported symbols.
You would need both the compiler option and a map file to keep functional
parity with whats there. Which is fine, that's easy enough to do and should
be some welcome housekeeping.
next prev parent reply other threads:[~2020-02-27 21:34 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 20:02 Annotate Deprecated Functions in libselinux bill.c.roberts
2020-02-25 20:02 ` [PATCH 01/17] security_load_booleans: update return comment bill.c.roberts
2020-02-25 20:02 ` [PATCH 02/17] selinux_booleans_path: annotate deprecated bill.c.roberts
2020-02-25 20:02 ` [PATCH 03/17] " bill.c.roberts
2020-02-25 20:02 ` [PATCH 04/17] selinux_users_path: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 05/17] rpm_execcon: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 06/17] sidget: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 07/17] sidput: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 08/17] checkPasswdAccess: " bill.c.roberts
2020-02-25 20:58 ` Stephen Smalley
2020-02-25 20:02 ` [PATCH 09/17] matchpathcon_init: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 10/17] matchpathcon_fini: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 11/17] matchpathcon: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 12/17] avc_init: " bill.c.roberts
2020-02-25 20:02 ` [PATCH 13/17] src/selinux_internal.h: fix hidden_proto indents bill.c.roberts
2020-02-25 20:02 ` [PATCH 14/17] selinux_internal.h: disable warnings on deprecated bill.c.roberts
2020-02-25 20:02 ` [PATCH 15/17] avc_open: mark allowed use of avc_init bill.c.roberts
2020-02-25 20:02 ` [PATCH 16/17] src/matchpathcon: allow use of deprecated funcs bill.c.roberts
2020-02-25 20:02 ` [PATCH 17/17] utils/matchpathcon: " bill.c.roberts
2020-02-25 20:51 ` Annotate Deprecated Functions in libselinux Stephen Smalley
2020-02-25 21:06 ` William Roberts
2020-02-27 18:41 ` William Roberts
2020-02-27 19:48 ` Stephen Smalley
2020-02-27 20:03 ` Ondrej Mosnacek
2020-02-27 20:10 ` William Roberts
2020-02-27 20:24 ` Stephen Smalley
2020-02-27 20:43 ` Ulrich Drepper
2020-02-27 21:05 ` William Roberts
2020-02-27 21:13 ` Stephen Smalley
2020-02-27 21:18 ` William Roberts
2020-02-27 21:32 ` Stephen Smalley
2020-02-27 21:34 ` William Roberts [this message]
2020-02-27 21:19 ` Ulrich Drepper
2020-02-27 21:31 ` William Roberts
2020-04-16 15:43 ` bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 01/18] security_load_booleans: update return comment bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 02/18] security_load_booleans: annotate deprecated bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 03/18] selinux_booleans_path: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 04/18] selinux_users_path: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 05/18] rpm_execcon: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 06/18] sidget: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 07/18] sidput: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 08/18] checkPasswdAccess: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 09/18] matchpathcon_init: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 10/18] matchpathcon_fini: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 11/18] matchpathcon: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 12/18] avc_init: " bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 13/18] avc: create internal avc_init interface bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 14/18] matchpathcon: create internal matchpathcon_fini interface bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 15/18] matchpathcon: create internal matchpathcon interface bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 16/18] selinux_check_passwd_access: annotate deprecated bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 17/18] utils: matchpathcon to use interal interfaces bill.c.roberts
2020-04-16 15:43 ` [PATCH v2 18/18] utils: matchpathcon add deprecated warning bill.c.roberts
2020-04-19 13:46 ` Annotate Deprecated Functions in libselinux Nicolas Iooss
2020-04-20 14:34 ` Roberts, William C
2020-04-20 15:45 ` [v3] " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 01/19] security_load_booleans: update return comment bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 02/19] security_load_booleans: annotate deprecated bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 03/19] selinux_booleans_path: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 04/19] selinux_users_path: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 05/19] rpm_execcon: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 06/19] sidget: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 07/19] sidput: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 08/19] checkPasswdAccess: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 09/19] matchpathcon_init: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 10/19] matchpathcon_fini: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 11/19] matchpathcon: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 12/19] avc_init: " bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 13/19] avc: create internal avc_init interface bill.c.roberts
2020-04-26 13:33 ` Nicolas Iooss
2020-04-26 15:53 ` William Roberts
2020-04-20 15:45 ` [PATCH v3 14/19] matchpathcon: create internal matchpathcon_fini interface bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 15/19] matchpathcon: create internal matchpathcon interface bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 16/19] selinux_check_passwd_access: annotate deprecated bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 17/19] matchpathcon: allow use of deprecated routines bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 18/19] utils: matchpathcon add deprecated warning bill.c.roberts
2020-04-20 15:45 ` [PATCH v3 19/19] Makefile: swig build allow deprecated functions bill.c.roberts
2020-04-27 20:22 ` [v4] Annotate Deprecated Functions in libselinux bill.c.roberts
2020-04-27 20:22 ` [PATCH v4 01/18] security_load_booleans: update return comment bill.c.roberts
2020-04-27 20:22 ` [PATCH v4 02/18] security_load_booleans: annotate deprecated bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 03/18] selinux_booleans_path: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 04/18] selinux_users_path: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 05/18] rpm_execcon: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 06/18] sidget: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 07/18] sidput: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 08/18] checkPasswdAccess: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 09/18] matchpathcon_init: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 10/18] matchpathcon_fini: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 11/18] matchpathcon: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 12/18] avc_init: " bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 13/18] avc: create internal avc_init interface bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 14/18] matchpathcon: create internal matchpathcon_fini interface bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 15/18] selinux_check_passwd_access: annotate deprecated bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 16/18] matchpathcon: allow use of deprecated routines bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 17/18] utils: matchpathcon add deprecated warning bill.c.roberts
2020-04-27 20:23 ` [PATCH v4 18/18] Makefile: swig build allow deprecated functions bill.c.roberts
2020-04-28 21:25 ` [v4] Annotate Deprecated Functions in libselinux Nicolas Iooss
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