linux-hardening - Re: [PATCH v1 3/6] device property: build kunit tests without structleak plugin

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Date:   Fri, 17 Sep 2021 08:54:50 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Brendan Higgins <brendanhiggins@...gle.com>
Cc:     shuah@...nel.org, davidgow@...gle.com, arnd@...db.de,
        rafael@...nel.org, jic23@...nel.org, lars@...afoo.de,
        ulf.hansson@...aro.org, andreas.noever@...il.com,
        michael.jamet@...el.com, mika.westerberg@...ux.intel.com,
        YehezkelShB@...il.com, masahiroy@...nel.org,
        michal.lkml@...kovi.net, ndesaulniers@...gle.com,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        gregkh@...uxfoundation.org, linux-iio@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-hardening@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH v1 3/6] device property: build kunit tests without
 structleak plugin

On Thu, Sep 16, 2021 at 11:11:01PM -0700, Brendan Higgins wrote:
> The structleak plugin causes the stack frame size to grow immensely when
> used with KUnit:
> 
> ../drivers/base/test/property-entry-test.c:492:1: warning: the frame size of 2832 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> ../drivers/base/test/property-entry-test.c:322:1: warning: the frame size of 2080 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> ../drivers/base/test/property-entry-test.c:250:1: warning: the frame size of 4976 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> ../drivers/base/test/property-entry-test.c:115:1: warning: the frame size of 3280 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> 
> Turn it off in this file.
> 
> Co-developed-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook