[OE-core] [PATCH 2/3] pulseaudio: disable PIE flags when hardened flags are enabled

[Khem Raj]

On Fri, Jun 9, 2017 at 9:38 AM, Tanu Kaskinen <tanuk at iki.fi> wrote:
> On Fri, 2017-06-09 at 13:07 +0000, Khem Raj wrote:
>> On Fri, Jun 9, 2017 at 5:56 AM Burton, Ross <ross.burton at intel.com> wrote:
>>
>> >
>> > On 9 June 2017 at 04:41, Khem Raj <raj.khem at gmail.com> wrote:
>> >
>> > > +SECURITY_CFLAGS = "${SECURITY_NO_PIE_CFLAGS}"
>> > >
>> >
>> > These tend to go into security-flags.inc, not the recipe.
>> >
>>
>> I know that's been the case but I think having a global file is error prone
>> its better to have it in recipe context since it can get attention at
>> upgrade time to test if this has been fixed in new release etc
>
> Do you mean that there's some bug in pulseaudio, and this is a
> workaround for it? Is the bug that there are textrels? Ross saw
> textrels in pulseaudio before (see the discussion starting at [1]), but
> I was unable to reproduce that. If you give instructions for
> reproducing the problem, I'll see if I can fix pulseaudio (until then
> I'm fine with having a workaround).
>

yes there is a bug lurking when compiling with hardening flags are turned on
so you can do something like

in local.conf

require conf/distro/include/security_flags.inc

then

MACHINE=qemux86 bitbake pulseaudio

it also happens on arm so qemuarm will reproduce it too.

some assembly code is probably missing using GOT relative accesses

> [1] http://lists.openembedded.org/pipermail/openembedded-core/2017-February/133215.html
>
> --
> Tanu
>
> https://www.patreon.com/tanuk