> -----Original Message-----
> From: openembedded-core-boun...@lists.openembedded.org <openembedded-
> core-boun...@lists.openembedded.org> On Behalf Of Khem Raj
> Sent: den 24 juli 2018 16:12
> To: ChenQi <qi.c...@windriver.com>
> Cc: Patches and discussions about the oe-core layer <openembedded-
> c...@lists.openembedded.org>
> Subject: Re: [OE-core] [PATCH] defaultsetup.conf: Enable security
> flags+pie by default
>
> On Tue, Jul 24, 2018 at 12:30 AM ChenQi <qi.c...@windriver.com> wrote:
> >
> > Hi Khem,
> >
> > The comments in security-flags.inc also needs to be modified to
> remove
> > 'poky-lsb' info.
> >
> > I'd suggest we still put it into distro conf file (poky.conf) instead
> of
> > defaultsetup.conf, because defaultsetup.conf is included by
> > bitbake.conf. I think things in defaultsetup.conf should be necessary
> > default values to build things out. I don't think security flags is
> > necessary to build things out.
>
> this is the default setup, even non-poky users will get consistent
> experience.
I have to agree with Chen here. I think requiring security_flags.inc from
defaultsetup.conf is the wrong thing to do. We use security_flags.inc in
our setup, and I know how much trouble it has brought. To me, using it
should be a distro decision, not something that is enforced by the use
of bitbake.
> > Also, I got a question when I just looked at this file.
> > Do you think we should adjust CFLAGS and LDFALGS in security_flags.inc
> > instead of the current TARGET_CC_ARCH and TARGET_LDFLAGS?
>
> in many cases packages do not honor CFLAGS/LDFLAGS say during configure
>
> > We are naming
> > variables to SECURITY_CFLAGS and SECURITY_LDFLAGS, it seems that they
> > belong to CFLAGS and LDFLAGS naturally. But I'm not sure about it.
> >
> yes they do, but this makes it easy to override the setting for
> packages where these options are needed to be overridden or modified.
Actually, with the changes introduced in Pyro, SECURITY_CFLAGS became a
mess. Before Pyro, you either set SECURITY_CFLAGS to
"${SECURITY_NO_PIE_CFLAGS}" (to disable the use of -fpie), or you set it
to the empty string (to disable all security options). With Pyro and later,
you instead have to set SECURITY_CFLAGS to "${SECURITY_NO_PIE_CFLAGS}
${SECURITY_NOPIE_CFLAGS}" to make sure -fpie is disabled, or set it to
"${SECURITY_NOPIE_CFLAGS}" to disable everything. Alternatively you can
set SECURITY_PIE_CFLAGS to "${SECURITY_NOPIE_CFLAGS}" to only disable
-fpie.
I have considered to suggest changing the definition of
SECURITY_NOPIE_CFLAGS to:
SECURITY_NOPIE_CFLAGS ?= "${@'-no-pie -fno-PIE' if '${GCCPIE}' else ''}"
and then change SECURITY_NO_PIE_CFLAGS to:
SECURITY_NO_PIE_CFLAGS ?= "-fstack-protector-strong ${SECURITY_NOPIE_CFLAGS}
${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
That would better have matched the situation before Pyro, in that one yet
again would set SECURITY_CFLAGS to "${SECURITY_NO_PIE_CFLAGS}" to disable
-fpie. Unfortunately one would still have to set SECURITY_CFLAGS to
"${SECURITY_NOPIE_CFLAGS}" to disable everything.
> > Best Regards,
> > Chen Qi
> >
> >
> > On 07/24/2018 03:09 AM, Khem Raj wrote:
> > > This has been an opt-in for so long, some distributions e.g.
> > > poky-lsb uses it by default however, since most of linux
> > > distros have started to default to these settings for security
> > > enhancements, time has come for OE to make it default too
> > >
> > > Signed-off-by: Khem Raj <raj.k...@gmail.com>
> > > ---
> > > meta/conf/distro/defaultsetup.conf | 1 +
> > > 1 file changed, 1 insertion(+)
> > >
> > > diff --git a/meta/conf/distro/defaultsetup.conf
> b/meta/conf/distro/defaultsetup.conf
> > > index ca2f9178d2..352e279596 100644
> > > --- a/meta/conf/distro/defaultsetup.conf
> > > +++ b/meta/conf/distro/defaultsetup.conf
> > > @@ -1,6 +1,7 @@
> > > include conf/distro/include/default-providers.inc
> > > include conf/distro/include/default-versions.inc
> > > include conf/distro/include/default-distrovars.inc
> > > +require conf/distro/include/security_flags.inc
> > > include conf/distro/include/world-broken.inc
> > >
> > > TCMODE ?= "default"
//Peter
--
_______________________________________________
Openembedded-core mailing list
Openembedded-core@lists.openembedded.org
http://lists.openembedded.org/mailman/listinfo/openembedded-core
