Message-id: <55648193.3030003@samsung.com>
Date: Tue, 26 May 2015 17:22:11 +0300
From: Andrey Ryabinin <a.ryabinin@samsung.com>
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To: Linus Walleij <linus.walleij@linaro.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Dmitry Vyukov <dvyukov@google.com>,
        Alexander Potapenko <glider@google.com>,
        David Keitel <dkeitel@codeaurora.org>, Arnd Bergmann <arnd@arndb.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        linux-mm@kvack.org
Subject: Re: [PATCH v2 5/5] arm64: add KASan support
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On 05/26/2015 05:12 PM, Andrey Ryabinin wrote:
> On 05/26/2015 04:35 PM, Linus Walleij wrote:
>> I wonder were the problem lies, any hints where to start looking
>> to fix this?
>>
> 
> I suspect that your compiler lack -fsantize=kernel-address support.
> It seems that GCC 4.9.2 doesn't supports -fsanitize=address/kernel-address on aarch64.
> 

In that case you should get something like this, during kernel build:
	scripts/Makefile.kasan:17: Cannot use CONFIG_KASAN: -fsanitize=kernel-address is not supported by compiler


Also you may check you gcc by compiling simple program:
$ cat test.c
void main(void) {
}

$ gcc -fsanitize=kernel-address test.c


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