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From: Andrey Konovalov <andreyknvl@google.com>
To: Lecopzer Chen <lecopzer@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>
Cc: Lecopzer Chen <lecopzer.chen@mediatek.com>,
	yj.chiang@mediatek.com, linux-mediatek@lists.infradead.org,
	LKML <linux-kernel@vger.kernel.org>,
	kasan-dev <kasan-dev@googlegroups.com>,
	Linux Memory Management List <linux-mm@kvack.org>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 0/3] arm64: kasan: support CONFIG_KASAN_VMALLOC
Date: Fri, 8 Jan 2021 19:30:33 +0100	[thread overview]
Message-ID: <CAAeHK+y=vEuSe-LFOhxkEu4x0Dy2jYts18R0V6Pbv1-5Cwg9_g@mail.gmail.com> (raw)
In-Reply-To: <20210103171137.153834-1-lecopzer@gmail.com>

On Sun, Jan 3, 2021 at 6:12 PM 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,
> but not test for HW_TAG(I have no proper device), thus keep
> HW_TAG and KASAN_VMALLOC mutual exclusion until confirming
> the functionality.
>
>
> [1]: commit 0609ae011deb41c ("x86/kasan: support KASAN_VMALLOC")
>
> Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>

Hi Lecopzer,

Thanks for working on this!

Acked-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>

for the series along with the other two patches minding the nit in patch #3.

Will, Catalin, could you please take a look at the arm changes?

Thanks!

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  parent reply	other threads:[~2021-01-08 18:32 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-03 17:11 [PATCH 0/3] arm64: kasan: support CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-03 17:11 ` [PATCH 1/3] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-03 17:11 ` [PATCH 2/3] arm64: kasan: abstract _text and _end to KERNEL_START/END Lecopzer Chen
2021-01-03 17:11 ` [PATCH 3/3] arm64: Kconfig: support CONFIG_KASAN_VMALLOC Lecopzer Chen
2021-01-08 18:29   ` Andrey Konovalov
2021-01-09  7:26     ` Lecopzer Chen
2021-01-08 18:30 ` Andrey Konovalov [this message]
2021-01-08 18:41   ` [PATCH 0/3] arm64: kasan: " Ard Biesheuvel
2021-01-09 10:02     ` Lecopzer Chen
2021-01-08 18:37 ` Andrey Konovalov
2021-01-09  7:34   ` Lecopzer Chen

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