linux-kernel - Re: [kbuild-all] Re: drivers/net/wan/slic_ds26522.c:205:12: warning: stack frame size of 12288 bytes in function 'slic_ds26522

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Message-ID: <71e44c1f-3c9f-db89-0347-3e23699d67cb@intel.com>
Date:   Tue, 24 Nov 2020 16:01:58 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>,
        kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [kbuild-all] Re: drivers/net/wan/slic_ds26522.c:205:12: warning:
 stack frame size of 12288 bytes in function 'slic_ds26522_probe'



On 11/23/20 10:15 PM, Andrey Konovalov wrote:
> On Thu, Nov 19, 2020 at 11:16 PM kernel test robot <lkp@...el.com> wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   3494d58865ad4a47611dbb427b214cc5227fa5eb
>> commit: cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 kasan: allow enabling stack tagging for tag-based mode
>> date:   3 months ago
>> config: arm64-randconfig-r002-20201119 (attached as .config)
>> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2613fb2f0f53691dd0211895afbb9413457fca7)
>> reproduce (this is a W=1 build):
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          # install arm64 cross compiling tool for clang build
>>          # apt-get install binutils-aarch64-linux-gnu
>>          # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
>>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>          git fetch --no-tags linus master
>>          git checkout cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> drivers/net/wan/slic_ds26522.c:205:12: warning: stack frame size of 12288 bytes in function 'slic_ds26522_probe' [-Wframe-larger-than=]
>>     static int slic_ds26522_probe(struct spi_device *spi)
>>                ^
>>     1 warning generated.
>> --
>>>> drivers/gpu/drm/panel/panel-sitronix-st7789v.c:194:12: warning: stack frame size of 18352 bytes in function 'st7789v_prepare' [-Wframe-larger-than=]
>>     static int st7789v_prepare(struct drm_panel *panel)
>>                ^
>>     1 warning generated.
> Same issue as reported previously. Copying my response from the other
> email just in case:
>
> This is the same issue in LLVM that was reported by Arnd for generic
> KASAN (also see KASAN_STACK_ENABLE option description). By default
> KASAN shouldn't have stack instrumentation enabled unless
> KASAN_STACK_ENABLE is specified. Perhaps it makes sense to disable it
> for KASAN_SW_TAGS config on the kernel test robot.
>
> [1] https://bugs.llvm.org/show_bug.cgi?id=38809

Hi Andrey,

Thanks for the explanation, we'll disable CONFIG_KASAN_SW_TAGS.

Best Regards,
Rong Chen