LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Brendan Higgins <brendanhiggins@google.com>
To: Kees Cook <keescook@chromium.org>
Cc: shuah@kernel.org, davidgow@google.com, arnd@arndb.de,
	rafael@kernel.org, jic23@kernel.org, lars@metafoo.de,
	ulf.hansson@linaro.org, andreas.noever@gmail.com,
	michael.jamet@intel.com, mika.westerberg@linux.intel.com,
	yehezkelshb@gmail.com, masahiroy@kernel.org,
	michal.lkml@markovi.net, ndesaulniers@google.com,
	linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com,
	linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
	gregkh@linuxfoundation.org, linux-iio@vger.kernel.org,
	linux-mmc@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-hardening@vger.kernel.org, linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v1 2/6] iio/test-format: build kunit tests without structleak plugin
Date: Wed, 29 Sep 2021 13:50:41 -0700	[thread overview]
Message-ID: <CAFd5g442faOu8OeydVr4qZ4YGAY9NrO6uo16ecfm=2=GQY7YBA@mail.gmail.com> (raw)
In-Reply-To: <202109170851.4485B94148@keescook>

On Fri, Sep 17, 2021 at 8:54 AM Kees Cook <keescook@chromium.org> wrote:
>
> On Thu, Sep 16, 2021 at 11:11:00PM -0700, Brendan Higgins wrote:
> > The structleak plugin causes the stack frame size to grow immensely when
> > used with KUnit:
> >
> > ../drivers/iio/test/iio-test-format.c: In function ‘iio_test_iio_format_value_fixedpoint’:
> > ../drivers/iio/test/iio-test-format.c:98:1: warning: the frame size of 2336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> >
> > Turn it off in this file.
>
> Given that these are all for KUnit tests, is it possible there are going
> to be other CONFIGs that will interact poorly (e.g. KASAN)? Maybe there
> needs to be a small level of indirection with something like:

I don't think so. KASAN actually uses KUnit to test it, and we have
experimented running KASAN alongside other KUnit tests for added
protection and results have looked good.

I would be surprised if there are other CONFIGs other than things
dealing with stack size that don't like KUnit.

> DISABLE_UNDER_KUNIT := $(DISABLE_STRUCTLEAK_PLUGIN)
> export DISABLE_UNDER_KUNIT
>
> then all of these become:
>
> +CFLAGS_iio-test-format.o += $(DISABLE_UNDER_KUNIT)
>
> Either way, I think these are fine to add.

I like your suggestion if we find other configs that don't like KUnit,
but I don't think we have seen any others so far, so I think I will
keep it as it is for now.

> Reviewed-by: Kees Cook <keescook@chromium.org>
>
>
> >
> > Co-developed-by: Arnd Bergmann <arnd@arndb.de>
> > Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
> > ---
> >  drivers/iio/test/Makefile | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/iio/test/Makefile b/drivers/iio/test/Makefile
> > index f1099b4953014..467519a2027e5 100644
> > --- a/drivers/iio/test/Makefile
> > +++ b/drivers/iio/test/Makefile
> > @@ -5,3 +5,4 @@
> >
> >  # Keep in alphabetical order
> >  obj-$(CONFIG_IIO_TEST_FORMAT) += iio-test-format.o
> > +CFLAGS_iio-test-format.o += $(DISABLE_STRUCTLEAK_PLUGIN)
> > --
> > 2.33.0.464.g1972c5931b-goog
> >
>
> --
> Kees Cook

  reply	other threads:[~2021-09-29 20:50 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-17  6:10 [PATCH v1 0/6] kunit: " Brendan Higgins
2021-09-17  6:10 ` [PATCH v1 1/6] gcc-plugins/structleak: add makefile var for disabling structleak Brendan Higgins
2021-09-17 15:48   ` Kees Cook
2021-09-29 20:25     ` Brendan Higgins
2021-09-17  6:11 ` [PATCH v1 2/6] iio/test-format: build kunit tests without structleak plugin Brendan Higgins
2021-09-17 15:54   ` Kees Cook
2021-09-29 20:50     ` Brendan Higgins [this message]
2021-09-18 15:58   ` Jonathan Cameron
2021-09-17  6:11 ` [PATCH v1 3/6] device property: " Brendan Higgins
2021-09-17 15:54   ` Kees Cook
2021-09-17  6:11 ` [PATCH v1 4/6] thunderbolt: " Brendan Higgins
2021-09-17 10:16   ` Mika Westerberg
2021-09-17 15:55   ` Kees Cook
2021-09-17  6:11 ` [PATCH v1 5/6] mmc: sdhci-of-aspeed: " Brendan Higgins
2021-09-17 15:56   ` Kees Cook
2021-09-17 18:40     ` Linus Torvalds
2021-09-29 20:59       ` Brendan Higgins
2021-09-17  6:11 ` [PATCH v1 6/6] bitfield: " Brendan Higgins
2021-09-17  7:22   ` Arnd Bergmann
2021-09-17 15:57     ` Kees Cook
2021-09-29 21:04     ` Brendan Higgins
2021-09-17  7:38 ` [PATCH v1 0/6] kunit: " Arnd Bergmann
2021-09-29 20:46   ` Brendan Higgins

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAFd5g442faOu8OeydVr4qZ4YGAY9NrO6uo16ecfm=2=GQY7YBA@mail.gmail.com' \
    --to=brendanhiggins@google.com \
    --cc=andreas.noever@gmail.com \
    --cc=arnd@arndb.de \
    --cc=davidgow@google.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=jic23@kernel.org \
    --cc=keescook@chromium.org \
    --cc=kunit-dev@googlegroups.com \
    --cc=lars@metafoo.de \
    --cc=linux-hardening@vger.kernel.org \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-kbuild@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=masahiroy@kernel.org \
    --cc=michael.jamet@intel.com \
    --cc=michal.lkml@markovi.net \
    --cc=mika.westerberg@linux.intel.com \
    --cc=ndesaulniers@google.com \
    --cc=rafael@kernel.org \
    --cc=shuah@kernel.org \
    --cc=torvalds@linux-foundation.org \
    --cc=ulf.hansson@linaro.org \
    --cc=yehezkelshb@gmail.com \
    --subject='Re: [PATCH v1 2/6] iio/test-format: build kunit tests without structleak plugin' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).