Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH -next 3/3] kasan: arm64: Fix pcpu_page_first_chunk crash
 with KASAN_VMALLOC
To:     kernel test robot <lkp@intel.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        "Dmitry Vyukov" <dvyukov@google.com>
CC:     <kbuild-all@lists.01.org>, <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>,
        <linux-mm@kvack.org>
References: <20210705111453.164230-4-wangkefeng.wang@huawei.com>
 <202107052207.RUhTJd4N-lkp@intel.com>
From:   Kefeng Wang <wangkefeng.wang@huawei.com>
Message-ID: <3463cf5e-2562-7a23-6c57-421d5c3e2b4f@huawei.com>
Date:   Tue, 6 Jul 2021 12:12:08 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101
 Thunderbird/60.7.0
MIME-Version: 1.0
In-Reply-To: <202107052207.RUhTJd4N-lkp@intel.com>
Content-Type: text/plain; charset="windows-1252"; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Precedence: bulk


On 2021/7/5 22:10, kernel test robot wrote:
> Hi Kefeng,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on next-20210701]
>
> url:    https://github.com/0day-ci/linux/commits/Kefeng-Wang/arm64-support-page-mapping-percpu-first-chunk-allocator/20210705-190907
> base:    fb0ca446157a86b75502c1636b0d81e642fe6bf1
> config: i386-randconfig-a015-20210705 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>          # https://github.com/0day-ci/linux/commit/5f6b5a402ed3e390563ddbddf12973470fd4886d
>          git remote add linux-review https://github.com/0day-ci/linux
>          git fetch --no-tags linux-review Kefeng-Wang/arm64-support-page-mapping-percpu-first-chunk-allocator/20210705-190907
>          git checkout 5f6b5a402ed3e390563ddbddf12973470fd4886d
>          # save the attached .config to linux build tree
>          make W=1 ARCH=i386
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
>     mm/vmalloc.c: In function 'vm_area_register_early':
>>> mm/vmalloc.c:2252:2: error: implicit declaration of function 'kasan_populate_early_vm_area_shadow' [-Werror=implicit-function-declaration]
should add? a stub function when KASAN is not enabled, thanks.
>      2252 |  kasan_populate_early_vm_area_shadow(vm->addr, vm->size);
>           |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     cc1: some warnings being treated as errors
>
>
> vim +/kasan_populate_early_vm_area_shadow +2252 mm/vmalloc.c
>