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

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Message-ID: <CAGXu5jKtrx5N1ctnQgqU7sf3ptCZ93YepzB50_MjDyi0MfXpwA@mail.gmail.com>
Date:   Tue, 18 Oct 2016 15:05:39 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Emese Revfy <re.emese@...il.com>
Cc:     kbuild test robot <fengguang.wu@...el.com>, kbuild-all@...org,
        LKML <linux-kernel@...r.kernel.org>,
        "pageexec@...email.hu" <pageexec@...email.hu>,
        "spender@...ecurity.net" <spender@...ecurity.net>
Subject: Re: drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size
 of 1108 bytes is larger than 1024 bytes

On Tue, Oct 18, 2016 at 2:36 PM, Emese Revfy <re.emese@...il.com> wrote:
> On Tue, 18 Oct 2016 13:57:35 -0700
> Kees Cook <keescook@...omium.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. :)

Thanks!

-Kees

-- 
Kees Cook
Nexus Security