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From: linus.walleij@linaro.org (Linus Walleij)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 5/5] arm64: add KASan support
Date: Mon, 24 Aug 2015 15:02:53 +0200	[thread overview]
Message-ID: <CACRpkdYL7R+WKfGZwmM7NGqvY8Arc_B3ekbUhkr7VPbQzAdZVg@mail.gmail.com> (raw)
In-Reply-To: <55D497FC.9060506@gmail.com>

On Wed, Aug 19, 2015 at 4:51 PM, Andrey Ryabinin <ryabinin.a.a@gmail.com> wrote:
> On 08/19/2015 03:14 PM, Linus Walleij wrote:

>> Integrator/AP (ARMv5):
>>
>> This one mounted with an ARMv5 ARM926 tile. It boots nicely
>> (but takes forever) with KASan and run all test cases (!) just like
>> for the other platforms but before reaching userspace this happens:
>
> THREAD_SIZE hardcoded in act_mm macro.
>
> This hack should help:
>
> diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
> index c671f34..b1765f2 100644
> --- a/arch/arm/mm/proc-macros.S
> +++ b/arch/arm/mm/proc-macros.S
> @@ -32,6 +32,9 @@
>         .macro  act_mm, rd
>         bic     \rd, sp, #8128
>         bic     \rd, \rd, #63
> +#ifdef CONFIG_KASAN
> +       bic     \rd, \rd, #8192
> +#endif
>         ldr     \rd, [\rd, #TI_TASK]
>         ldr     \rd, [\rd, #TSK_ACTIVE_MM]
>         .endm

Yes this work, thanks! I now get to userspace.
Tested-by: Linus Walleij <linus.walleij@linaro.org>

I have compiled Trinity and running some stress on different boards.
The ARMv7 seems to rather die from random nasty stuff from the
syscall or OOM rather than any KASan-detected bugs, but I'll
keep hammering at it a big.

I have some odd patch I'll pass along.

Yours,
Linus Walleij

  reply	other threads:[~2015-08-24 13:02 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-15 13:58 [PATCH v2 0/5] KASan for arm64 Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 1/5] kasan, x86: move KASAN_SHADOW_OFFSET to the arch Kconfig Andrey Ryabinin
2015-05-16 11:27   ` Paul Bolle
2015-05-18  7:43     ` Andrey Ryabinin
2015-05-18  8:34       ` Paul Bolle
2015-05-15 13:59 ` [PATCH v2 2/5] x86: kasan: fix types in kasan page tables declarations Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 3/5] x86: kasan: generalize populate_zero_shadow() code Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 4/5] kasan, x86: move populate_zero_shadow() out of arch directory Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 5/5] arm64: add KASan support Andrey Ryabinin
2015-05-26 13:35   ` Linus Walleij
2015-05-26 14:12     ` Andrey Ryabinin
2015-05-26 14:22       ` Andrey Ryabinin
2015-05-26 20:28         ` Linus Walleij
2015-05-27 12:40   ` Linus Walleij
2015-06-11 13:39   ` Linus Walleij
2015-06-12 18:14     ` Andrey Ryabinin
2015-06-13 15:25       ` Linus Walleij
2015-06-17 21:32         ` Andrey Ryabinin
2015-07-21 10:36           ` Linus Walleij
2015-07-21 14:27             ` Andrey Ryabinin
2015-07-21 21:27               ` Linus Walleij
2015-07-22 17:54                 ` Andrey Ryabinin
2015-08-19 12:14                   ` Linus Walleij
2015-08-19 14:51                     ` Andrey Ryabinin
2015-08-24 13:02                       ` Linus Walleij [this message]
2015-08-24 13:15                 ` Russell King - ARM Linux
2015-08-24 13:45                   ` Linus Walleij
2015-08-24 14:15                     ` Andrey Ryabinin
2015-08-24 15:44                       ` Vladimir Murzin
2015-08-24 16:00                         ` Andrey Ryabinin
2015-08-24 16:16                           ` Vladimir Murzin
2015-08-24 16:18                             ` Andrey Ryabinin
2015-08-24 17:47                       ` Russell King - ARM Linux
2015-08-25  9:15                         ` Will Deacon
2015-07-08 15:48   ` Catalin Marinas
2015-07-10 17:11     ` Andrey Ryabinin
2015-07-14 15:04       ` Catalin Marinas
2015-07-15  8:55         ` Andrey Ryabinin
2015-07-15 16:37           ` Catalin Marinas
2015-07-16 15:30             ` Andrey Ryabinin
2015-07-16 16:03               ` Catalin Marinas
2015-07-17 13:13                 ` Andrey Ryabinin

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