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Message-ID: <CAG48ez3LZ1xzAYHm23JOXTFBZqaHkVVZXwSe+VmmCBTwxKOdUQ@mail.gmail.com>
Date: Thu, 4 Jun 2020 16:25:31 +0200
From: Jann Horn <jannh@...gle.com>
To: Alexander Popov <alex.popov@...ux.com>
Cc: Will Deacon <will@...nel.org>, Kees Cook <keescook@...omium.org>,
Emese Revfy <re.emese@...il.com>, Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
Masahiro Yamada <masahiroy@...nel.org>, Michal Marek <michal.lkml@...kovi.net>,
Andrew Morton <akpm@...ux-foundation.org>, Masahiro Yamada <yamada.masahiro@...ionext.com>,
Thiago Jung Bauermann <bauerman@...ux.ibm.com>, Luis Chamberlain <mcgrof@...nel.org>, Jessica Yu <jeyu@...nel.org>,
Sven Schnelle <svens@...ckframe.org>, Iurii Zaikin <yzaikin@...gle.com>,
Catalin Marinas <catalin.marinas@....com>, Vincenzo Frascino <vincenzo.frascino@....com>,
Thomas Gleixner <tglx@...utronix.de>, Peter Collingbourne <pcc@...gle.com>, Naohiro Aota <naohiro.aota@....com>,
Alexander Monakov <amonakov@...ras.ru>, Mathias Krause <minipli@...glemail.com>,
PaX Team <pageexec@...email.hu>, Brad Spengler <spender@...ecurity.net>,
Laura Abbott <labbott@...hat.com>, Florian Weimer <fweimer@...hat.com>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>, linux-kbuild@...r.kernel.org,
"the arch/x86 maintainers" <x86@...nel.org>, Linux ARM <linux-arm-kernel@...ts.infradead.org>,
kernel list <linux-kernel@...r.kernel.org>, gcc@....gnu.org, notify@...nel.org
Subject: Re: [PATCH 5/5] gcc-plugins/stackleak: Don't instrument
vgettimeofday.c in arm64 VDSO
On Thu, Jun 4, 2020 at 4:21 PM Alexander Popov <alex.popov@...ux.com> wrote:
> On 04.06.2020 17:14, Jann Horn wrote:
> > Maybe at some point we should replace exclusions based on
> > GCC_PLUGINS_CFLAGS and KASAN_SANITIZE and UBSAN_SANITIZE and
> > OBJECT_FILES_NON_STANDARD and so on with something more generic...
> > something that says "this file will not be built into the normal
> > kernel, it contains code that runs in realmode / userspace / some
> > similarly weird context, and none of our instrumentation
> > infrastructure is available there"...
>
> Good idea. I would also add 'notrace' to that list.
Hm? notrace code should definitely still be subject to sanitizer
instrumentation.
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