linux-hardening - [RFC 2/3] drivers/base: build kunit tests without structleak plugin

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Message-Id: <20210125124533.101339-3-arnd@kernel.org>
Date:   Mon, 25 Jan 2021 13:45:27 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>, Kees Cook <keescook@...omium.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Alan Maguire <alan.maguire@...cle.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Vitor Massaru Iha <vitor@...saru.org>,
        linux-hardening@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: [RFC 2/3] drivers/base: build kunit tests without structleak plugin

From: Arnd Bergmann <arnd@...db.de>

The structleak plugin causes the stack frame size to grow immensely:

drivers/base/test/property-entry-test.c: In function 'pe_test_reference':
drivers/base/test/property-entry-test.c:481:1: error: the frame size of 2640 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
  481 | }
      | ^
drivers/base/test/property-entry-test.c: In function 'pe_test_uints':
drivers/base/test/property-entry-test.c:99:1: error: the frame size of 2592 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

Turn it off in this file.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/base/test/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/base/test/Makefile b/drivers/base/test/Makefile
index 3ca56367c84b..2f15fae8625f 100644
--- a/drivers/base/test/Makefile
+++ b/drivers/base/test/Makefile
@@ -2,3 +2,4 @@
 obj-$(CONFIG_TEST_ASYNC_DRIVER_PROBE)	+= test_async_driver_probe.o
 
 obj-$(CONFIG_KUNIT_DRIVER_PE_TEST) += property-entry-test.o
+CFLAGS_REMOVE_property-entry-test.o += -fplugin-arg-structleak_plugin-byref -fplugin-arg-structleak_plugin-byref-all
-- 
2.29.2