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Date: Thu, 18 Feb 2016 17:54:47 +0000
From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Will Deacon <will.deacon@arm.com>, mingo@kernel.org,
        Andrey Ryabinin <aryabinin@virtuozzo.com>, akpm@linux-foundation.org,
        hpa@linux.intel.com, tglx@linutronix.de
Subject: Re: [PATCH] arm64: kasan: clear stale stack poison
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On Thu, Feb 18, 2016 at 05:27:38PM +0000, Mark Rutland wrote:
> @@ -145,6 +146,7 @@ ENTRY(cpu_resume_mmu)
>  ENDPROC(cpu_resume_mmu)
>  	.popsection
>  cpu_resume_after_mmu:
> +	kasan_unpoison_stack 96

I don't think the 96 here is needed since we populate the stack in
assembly (__cpu_suspend_enter) and unwind it again still in assembly
(cpu_resume_after_mmu), so no KASAN shadow writes/reads.

Otherwise the patch looks fine.

-- 
Catalin