Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size of 1108 bytes is larger than 1024 bytes

From	Emese Revfy <re.emese@gmail.com>
Newsgroups	linux.kernel
Subject	Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size of 1108 bytes is larger than 1024 bytes
Date	2016-10-19 00:20 +0200
Message-ID	<stKTL-8nr-5@gated-at.bofh.it> (permalink)
References	<ssGfv-5Xy-1@gated-at.bofh.it> <stnNw-Pb-27@gated-at.bofh.it> <stJEm-79N-7@gated-at.bofh.it> <stKh3-7Hz-3@gated-at.bofh.it> <stKK5-8dt-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, 18 Oct 2016 15:05:39 -0700
Kees Cook <keescook@chromium.org> wrote:

> On Tue, Oct 18, 2016 at 2:36 PM, Emese Revfy <re.emese@gmail.com> wrote:
> > On Tue, 18 Oct 2016 13:57:35 -0700
> > Kees Cook <keescook@chromium.org> wrote:
> >
> >> This is controlled by CONFIG_FRAME_WARN. I don't think this is a
> >> particular problem or should be avoided, but perhaps we can set the
> >> default to 2048 (as done on 64BIT) if we're building with the entropy
> >> plugin.
> >
> > This is probably a gcc code generation bug on i386 when a plugin uses too many 64 bit variables
> > so I think PaX Team's patch will be the best solution.
> 
> Okay, cool. If you're able, please CC me with the fix when it happens. :)

This is the plugin side fix:
https://github.com/ephox-gcc-plugins/latent_entropy/commit/12776eab89861239d5194a9241a98e48e3b3e8ae

The kernel side fix will be released in PaX for linux 4.8.

-- 
Emese

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drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size of  1108 bytes is larger than 1024 bytes kbuild test robot <fengguang.wu@intel.com> - 2016-10-16 01:10 +0200
  Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame  size of 1108 bytes is larger than 1024 bytes Emese Revfy <re.emese@gmail.com> - 2016-10-17 23:40 +0200
    Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size  of 1108 bytes is larger than 1024 bytes Kees Cook <keescook@chromium.org> - 2016-10-18 23:00 +0200
      Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame  size of 1108 bytes is larger than 1024 bytes Emese Revfy <re.emese@gmail.com> - 2016-10-18 23:40 +0200
        Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size  of 1108 bytes is larger than 1024 bytes Kees Cook <keescook@chromium.org> - 2016-10-19 00:10 +0200
          Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame  size of 1108 bytes is larger than 1024 bytes Emese Revfy <re.emese@gmail.com> - 2016-10-19 00:20 +0200

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