From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
paulus@samba.org, mpe@ellerman.id.au,
linuxppc-dev@lists.ozlabs.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH V2 00/10] KASan ppc64 support
Date: Wed, 26 Aug 2015 22:44:35 +0530 [thread overview]
Message-ID: <87k2sic6pw.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAPAsAGyMBnGJyBCoq2n9YSgC73GXr9-w3SjCTVdfz++drzOVGw@mail.gmail.com>
Andrey Ryabinin <ryabinin.a.a@gmail.com> writes:
> 2015-08-26 11:26 GMT+03:00 Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>:
>> Hi,
>>
>> This patchset implements kernel address sanitizer for ppc64.
>> Since ppc64 virtual address range is divided into different regions,
>> we can't have one contigous area for the kasan shadow range. Hence
>> we don't support the INLINE kasan instrumentation. With Outline
>> instrumentation, we override the shadow_to_mem and mem_to_shadow
>> callbacks, so that we map only the kernel linear range (ie,
>> region with ID 0xc). For region with ID 0xd and 0xf (vmalloc
>> and vmemmap ) we return the address of the zero page. This
>> works because kasan doesn't track both vmemmap and vmalloc address.
>>
>> Known issues:
>> * Kasan is not yet enabled for arch/powerpc/kvm
>> * kexec hang
>> * outline stack and global support
>>
>
> Is there any problem with globals or you just didn't try it yet?
> I think it should just work. You need only to add --param
> asan-globals=0 to KBUILD_CFLAGS_MODULE
> to disable it for modules.
I am hitting BUG_ON in early vmalloc code. I still haven't got time to
debug it further. Should get to that soon.
-aneesh
next prev parent reply other threads:[~2015-08-26 17:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-26 8:26 [PATCH V2 00/10] KASan ppc64 support Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 01/10] powerpc/mm: Add virt_to_pfn and use this instead of opencoding Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 02/10] kasan: MODULE_VADDR is not available on all archs Aneesh Kumar K.V
2015-08-26 17:00 ` Andrey Ryabinin
2015-08-30 12:33 ` Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 03/10] kasan: Rename kasan_enabled to kasan_report_enabled Aneesh Kumar K.V
2015-08-26 17:02 ` Andrey Ryabinin
2015-08-26 8:26 ` [PATCH V2 04/10] kasan: Don't use kasan shadow pointer in generic functions Aneesh Kumar K.V
2015-08-26 8:54 ` Aneesh Kumar K.V
2015-08-27 9:42 ` Andrey Ryabinin
2015-08-26 8:26 ` [PATCH V2 05/10] kasan: Enable arch to hook into kasan callbacks Aneesh Kumar K.V
2015-08-27 9:46 ` Andrey Ryabinin
2015-08-30 12:41 ` Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 06/10] kasan: Allow arch to overrride kasan shadow offsets Aneesh Kumar K.V
2015-08-27 9:48 ` Andrey Ryabinin
2015-08-26 8:26 ` [PATCH V2 07/10] kasan: Make INLINE KASan support arch selectable Aneesh Kumar K.V
2015-08-27 11:55 ` Andrey Ryabinin
2015-08-30 12:50 ` Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 08/10] kasan: Update feature support file Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 09/10] kasan: Prevent deadlock in kasan reporting Aneesh Kumar K.V
2015-08-27 12:08 ` Andrey Ryabinin
2015-08-30 12:53 ` Aneesh Kumar K.V
2015-08-26 8:26 ` [PATCH V2 10/10] powerpc/mm: kasan: Add kasan support for ppc64 Aneesh Kumar K.V
2015-08-27 12:16 ` Andrey Ryabinin
2015-08-26 16:37 ` [PATCH V2 00/10] KASan ppc64 support Andrey Ryabinin
2015-08-26 17:14 ` Aneesh Kumar K.V [this message]
2018-07-05 16:33 ` Christophe LEROY
2018-07-06 14:11 ` Aneesh Kumar K.V
2018-07-06 14:13 ` Christophe LEROY
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