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From: Andrey Konovalov <andreyknvl@google.com>
To: Max Filippov <jcmvbkbc@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Christoph Lameter <cl@linux.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Dave Martin <dave.martin@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	Ingo Molnar <mingo@kernel.org>,
	Paul Lawrence <paullawrence@google.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Arnd Bergmann <arnd@arndb.de>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Kate Stewart <kstewart@linuxfoundation.org>,
	Mike Rapoport <rppt@linux.vnet.ibm.com>,
	kasan-dev <kasan-dev@googlegroups.com>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
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	Linux Memory Management List <linux-mm@kvack.org>,
	Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
	Kostya Serebryany <kcc@google.com>,
	Evgenii Stepanov <eugenis@google.com>,
	Lee Smith <Lee.Smith@arm.com>,
	Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
	Jacob Bramley <Jacob.Bramley@arm.com>,
	Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
	Jann Horn <jannh@google.com>, Mark Brand <markbrand@google.com>,
	Chintan Pandya <cpandya@codeaurora.org>,
	Vishwath Mohan <vishwath@google.com>
Subject: Re: [PATCH v12 05/25] kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS
Date: Thu, 6 Dec 2018 11:19:04 +0100	[thread overview]
Message-ID: <CAAeHK+zprEaJMexWRZj1QbuygL0dOC5LqJRok8cairfLw=VVvw@mail.gmail.com> (raw)
In-Reply-To: <CAMo8BfK5aEGae--xvboLxMXTe1orA7kmLR_uFNCqC6M-a=Om5Q@mail.gmail.com>

On Tue, Dec 4, 2018 at 11:24 PM Max Filippov <jcmvbkbc@gmail.com> wrote:
>
> Hello,
>
> On Tue, Nov 27, 2018 at 9:00 AM Andrey Konovalov <andreyknvl@google.com> wrote:
> >
> > This commit splits the current CONFIG_KASAN config option into two:
> > 1. CONFIG_KASAN_GENERIC, that enables the generic KASAN mode (the one
> >    that exists now);
> > 2. CONFIG_KASAN_SW_TAGS, that enables the software tag-based KASAN mode.
>
> [...]
>
> > --- a/lib/Kconfig.kasan
> > +++ b/lib/Kconfig.kasan
> > @@ -1,35 +1,95 @@
> > +# This config refers to the generic KASAN mode.
> >  config HAVE_ARCH_KASAN
> >         bool
> >
> > +config HAVE_ARCH_KASAN_SW_TAGS
> > +       bool
> > +
> > +config CC_HAS_KASAN_GENERIC
> > +       def_bool $(cc-option, -fsanitize=kernel-address)
> > +
> > +config CC_HAS_KASAN_SW_TAGS
> > +       def_bool $(cc-option, -fsanitize=kernel-hwaddress)
> > +
> >  if HAVE_ARCH_KASAN
> >
> >  config KASAN
> > -       bool "KASan: runtime memory debugger"
> > +       bool "KASAN: runtime memory debugger"
> > +       help
> > +         Enables KASAN (KernelAddressSANitizer) - runtime memory debugger,
> > +         designed to find out-of-bounds accesses and use-after-free bugs.
> > +         See Documentation/dev-tools/kasan.rst for details.
>
> Perhaps KASAN should depend on
> CC_HAS_KASAN_GENERIC || CC_HAS_KASAN_SW_TAGS,
> otherwise make all*config may enable KASAN
> for a compiler that does not have any -fsanitize=kernel-*address
> support, resulting in build failures like this:
>   http://kisskb.ellerman.id.au/kisskb/buildresult/13606170/log/

Will fix in v13, thanks!

>
> --
> Thanks.
> -- Max
>
> --
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  reply	other threads:[~2018-12-06 10:19 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-27 16:55 [PATCH v12 00/25] kasan: add software tag-based mode for arm64 Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 01/25] kasan, mm: change hooks signatures Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 02/25] kasan, slub: handle pointer tags in early_kmem_cache_node_alloc Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 03/25] kasan: move common generic and tag-based code to common.c Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 04/25] kasan: rename source files to reflect the new naming scheme Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 05/25] kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS Andrey Konovalov
2018-12-04 22:23   ` Max Filippov
2018-12-06 10:19     ` Andrey Konovalov [this message]
2018-11-27 16:55 ` [PATCH v12 06/25] kasan, arm64: adjust shadow size for tag-based mode Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 07/25] kasan: rename kasan_zero_page to kasan_early_shadow_page Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 08/25] kasan: initialize shadow to 0xff for tag-based mode Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 09/25] arm64: move untagged_addr macro from uaccess.h to memory.h Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 10/25] kasan: add tag related helper functions Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 11/25] kasan, arm64: untag address in _virt_addr_is_linear Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 12/25] kasan: preassign tags to objects with ctors or SLAB_TYPESAFE_BY_RCU Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 13/25] kasan, arm64: fix up fault handling logic Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 14/25] kasan, arm64: enable top byte ignore for the kernel Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 15/25] kasan, mm: perform untagged pointers comparison in krealloc Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 16/25] kasan: split out generic_report.c from report.c Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 17/25] kasan: add bug reporting routines for tag-based mode Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 18/25] mm: move obj_to_index to include/linux/slab_def.h Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 19/25] kasan: add hooks implementation for tag-based mode Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 20/25] kasan, arm64: add brk handler for inline instrumentation Andrey Konovalov
2018-11-29 18:01   ` Will Deacon
2018-12-06 10:31     ` Andrey Konovalov
2018-12-06 11:11       ` Will Deacon
2018-12-06 12:25         ` Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 21/25] kasan, mm, arm64: tag non slab memory allocated via pagealloc Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 22/25] kasan: add __must_check annotations to kasan hooks Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 23/25] kasan, arm64: select HAVE_ARCH_KASAN_SW_TAGS Andrey Konovalov
2018-11-29 18:01   ` Will Deacon
2018-12-06 10:19     ` Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 24/25] kasan: update documentation Andrey Konovalov
2018-11-27 16:55 ` [PATCH v12 25/25] kasan: add SPDX-License-Identifier mark to source files Andrey Konovalov

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