From: Andrey Konovalov <andreyknvl@google.com>
To: Will Deacon <will@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Dan Williams <dan.j.williams@intel.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
"moderated list:ARM/Mediatek SoC..."
<linux-mediatek@lists.infradead.org>,
yj.chiang@mediatek.com, Catalin Marinas <catalin.marinas@arm.com>,
Ard Biesheuvel <ardb@kernel.org>, Mark Brown <broonie@kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
rppt@kernel.org, tyhicks@linux.microsoft.com,
Robin Murphy <robin.murphy@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
gustavoars@kernel.org, Lecopzer Chen <lecopzer@gmail.com>,
Lecopzer Chen <lecopzer.chen@mediatek.com>
Subject: Re: [PATCH v2 0/4] arm64: kasan: support CONFIG_KASAN_VMALLOC
Date: Thu, 21 Jan 2021 18:44:14 +0100 [thread overview]
Message-ID: <CAAeHK+z3oYx4WqX7Xor7gD=eqYkzW0UBS4h4is00HnfNnNkpDA@mail.gmail.com> (raw)
In-Reply-To: <20210109103252.812517-1-lecopzer@gmail.com>
On Sat, Jan 9, 2021 at 11:33 AM Lecopzer Chen <lecopzer@gmail.com> wrote:
>
> Linux supports KAsan for VMALLOC since commit 3c5c3cfb9ef4da9
> ("kasan: support backing vmalloc space with real shadow memory")
>
> Acroding to how x86 ported it [1], they early allocated p4d and pgd,
> but in arm64 I just simulate how KAsan supports MODULES_VADDR in arm64
> by not to populate the vmalloc area except for kimg address.
>
> Test environment:
> 4G and 8G Qemu virt,
> 39-bit VA + 4k PAGE_SIZE with 3-level page table,
> test by lib/test_kasan.ko and lib/test_kasan_module.ko
>
> It also works in Kaslr with CONFIG_RANDOMIZE_MODULE_REGION_FULL
> and randomize module region inside vmalloc area.
>
>
> [1]: commit 0609ae011deb41c ("x86/kasan: support KASAN_VMALLOC")
>
> Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
> Acked-by: Andrey Konovalov <andreyknvl@google.com>
> Tested-by: Andrey Konovalov <andreyknvl@google.com>
>
>
> v2 -> v1
> 1. kasan_init.c tweak indent
> 2. change Kconfig depends only on HAVE_ARCH_KASAN
> 3. support randomized module region.
>
> v1:
> https://lore.kernel.org/lkml/20210103171137.153834-1-lecopzer@gmail.com/
>
> Lecopzer Chen (4):
> arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC
> arm64: kasan: abstract _text and _end to KERNEL_START/END
> arm64: Kconfig: support CONFIG_KASAN_VMALLOC
> arm64: kaslr: support randomized module area with KASAN_VMALLOC
>
> arch/arm64/Kconfig | 1 +
> arch/arm64/kernel/kaslr.c | 18 ++++++++++--------
> arch/arm64/kernel/module.c | 16 +++++++++-------
> arch/arm64/mm/kasan_init.c | 29 +++++++++++++++++++++--------
> 4 files changed, 41 insertions(+), 23 deletions(-)
>
> --
> 2.25.1
>
Hi Will,
Could you PTAL at the arm64 changes?
Thanks!
next prev parent reply other threads:[~2021-01-21 17:46 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-09 10:32 [PATCH v2 0/4] arm64: kasan: support CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-09 10:32 ` [PATCH v2 1/4] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-02-03 18:37 ` Ard Biesheuvel
2021-02-04 6:21 ` Lecopzer Chen
2021-02-04 12:45 ` Will Deacon
2021-02-04 14:46 ` Lecopzer Chen
2021-02-04 15:01 ` Will Deacon
2021-02-04 16:37 ` Lecopzer Chen
2021-02-05 17:18 ` Will Deacon
2021-02-05 17:30 ` Andrey Konovalov
2021-02-05 17:43 ` Will Deacon
2021-02-05 20:50 ` Andrey Konovalov
2021-02-05 18:10 ` Lecopzer Chen
2021-01-09 10:32 ` [PATCH v2 2/4] arm64: kasan: abstract _text and _end to KERNEL_START/END Lecopzer Chen
2021-02-04 12:46 ` Will Deacon
2021-02-04 14:51 ` Lecopzer Chen
2021-02-04 14:55 ` Will Deacon
2021-02-04 16:06 ` Lecopzer Chen
2021-02-05 17:02 ` Will Deacon
2021-01-09 10:32 ` [PATCH v2 3/4] arm64: Kconfig: support CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-09 10:32 ` [PATCH v2 4/4] arm64: kaslr: support randomized module area with KASAN_VMALLOC Lecopzer Chen
2021-01-27 23:04 ` Will Deacon
2021-01-28 8:53 ` Lecopzer Chen
2021-01-28 20:26 ` Will Deacon
2021-01-21 10:19 ` [PATCH v2 0/4] arm64: kasan: support CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-21 17:44 ` Andrey Konovalov [this message]
2021-01-22 19:05 ` Will Deacon
2021-02-03 18:31 ` Ard Biesheuvel
2021-02-04 12:49 ` Will Deacon
2021-02-04 15:53 ` Lecopzer Chen
2021-02-04 17:57 ` Will Deacon
2021-02-04 18:41 ` Lecopzer Chen
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