From: Arnd Bergmann <arnd@arndb.de>
To: Kees Cook <keescook@chromium.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Alexander Popov <alex.popov@linux.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
LSM List <linux-security-module@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] structleak: disable BYREF_ALL in combination with KASAN_STACK
Date: Fri, 21 Jun 2019 11:43:58 +0200 [thread overview]
Message-ID: <CAK8P3a2uFcaGMSHRdg4NECHJwgAyhtMuYDv3U=z2UdBSL5U0Lw@mail.gmail.com> (raw)
In-Reply-To: <201906201034.9E44D8A2A8@keescook>
On Thu, Jun 20, 2019 at 7:36 PM Kees Cook <keescook@chromium.org> wrote:
>
> On Tue, Jun 18, 2019 at 11:47:13AM +0200, Arnd Bergmann wrote:
> > The combination of KASAN_STACK and GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
> > leads to much larger kernel stack usage, as seen from the warnings
> > about functions that now exceed the 2048 byte limit:
>
> Is the preference that this go into v5.2 (there's not much time left),
> or should this be v5.3? (You didn't mark it as Cc: stable?)
Having it in 5.2 would be great. I had not done much build testing in the last
months, so I didn't actually realize that your patch was merged a while ago
rather than only in linux-next.
BTW, I have now run into a small number of files that are still affected
by a stack overflow warning from STRUCTLEAK_BYREF_ALL. I'm trying
to come up with patches for those as well, we can probably do it in a way
that also improves the affected drivers. I'll put you on Cc when I
find another one.
Arnd
next prev parent reply other threads:[~2019-06-21 9:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-18 9:47 [PATCH] structleak: disable BYREF_ALL in combination with KASAN_STACK Arnd Bergmann
2019-06-20 17:35 ` Kees Cook
2019-06-21 9:43 ` Arnd Bergmann [this message]
2019-06-21 13:32 ` Ard Biesheuvel
2019-06-21 13:44 ` Arnd Bergmann
2019-06-21 13:50 ` Ard Biesheuvel
2019-06-22 20:26 ` Kees Cook
2019-06-25 15:01 ` Ard Biesheuvel
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