Re: [PATCH v6 0/6] KASAN for arm64

From	Mark Rutland <mark.rutland@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v6 0/6] KASAN for arm64
Date	2015-10-08 13:20 +0200
Message-ID	<qhhoS-1PL-25@gated-at.bofh.it> (permalink)
References	<q9DPA-7XC-9@gated-at.bofh.it> <qgTPC-1CH-65@gated-at.bofh.it> <qhgMa-QO-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Oct 08, 2015 at 01:36:09PM +0300, Andrey Ryabinin wrote:
> 2015-10-07 13:04 GMT+03:00 Catalin Marinas <catalin.marinas@arm.com>:
> > On Thu, Sep 17, 2015 at 12:38:06PM +0300, Andrey Ryabinin wrote:
> >> As usual patches available in git
> >>       git://github.com/aryabinin/linux.git kasan/arm64v6
> >>
> >> Changes since v5:
> >>  - Rebase on top of 4.3-rc1
> >>  - Fixed EFI boot.
> >>  - Updated Doc/features/KASAN.
> >
> > I tried to merge these patches (apart from the x86 one which is already
> > merged) but it still doesn't boot on Juno as an EFI application.
> >
> 
> 4.3-rc1 was ok and 4.3-rc4 is not. Break caused by 0ce3cc008ec04
> ("arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME
> regions")
> It introduced sort() call in efi_get_virtmap().
> sort() is generic kernel function and it's instrumented, so we crash
> when KASAN tries to access shadow in sort().

I believe this is solved by Ard's stub isolation series [1,2], which
will build a stub-specific copy of sort() and various other functions
(see the arm-deps in [2]).

So long as the stub is not built with ASAN, that should work.

Mark.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/373807.html
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/373808.html
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Thread

Re: [PATCH v6 0/6] KASAN for arm64 Catalin Marinas <catalin.marinas@arm.com> - 2015-10-07 12:10 +0200
  Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-08 12:40 +0200
    Re: [PATCH v6 0/6] KASAN for arm64 Mark Rutland <mark.rutland@arm.com> - 2015-10-08 13:10 +0200
    Re: [PATCH v6 0/6] KASAN for arm64 Mark Rutland <mark.rutland@arm.com> - 2015-10-08 13:20 +0200
      Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-08 13:30 +0200
        Re: [PATCH v6 0/6] KASAN for arm64 Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-10-08 14:10 +0200
          Re: [PATCH v6 0/6] KASAN for arm64 Catalin Marinas <catalin.marinas@arm.com> - 2015-10-08 17:20 +0200
            Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-08 18:10 +0200
              Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-09 11:40 +0200
                Re: [PATCH v6 0/6] KASAN for arm64 Mark Rutland <mark.rutland@arm.com> - 2015-10-09 11:50 +0200
                Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-09 12:20 +0200
                Re: [PATCH v6 0/6] KASAN for arm64 Mark Rutland <mark.rutland@arm.com> - 2015-10-09 14:50 +0200
                Re: [PATCH v6 0/6] KASAN for arm64 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-10-09 16:40 +0200
            Re: [PATCH v6 0/6] KASAN for arm64 Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-10-08 18:10 +0200

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