linux-kernel - Re: [PATCH v14 5/8] arm64: mte: Enable TCO in functions that can read beyond buffer limits

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Date:   Wed, 10 Mar 2021 06:40:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Vincenzo Frascino <vincenzo.frascino@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com
Cc:     kbuild-all@...org, Vincenzo Frascino <vincenzo.frascino@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: [PATCH v14 5/8] arm64: mte: Enable TCO in functions that can
 read beyond buffer limits

Hi Vincenzo,

I love your patch! Yet something to improve:

[auto build test ERROR on kvmarm/next]
[also build test ERROR on linus/master v5.12-rc2 next-20210309]
[cannot apply to arm64/for-next/core xlnx/master arm/for-next soc/for-next hnaz-linux-mm/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vincenzo-Frascino/arm64-ARMv8-5-A-MTE-Add-async-mode-support/20210309-001716
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next
config: arm64-randconfig-s032-20210309 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-262-g5e674421-dirty
        # https://github.com/0day-ci/linux/commit/660df126323fe5533a1be7834e1754a1adc69f13
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vincenzo-Frascino/arm64-ARMv8-5-A-MTE-Add-async-mode-support/20210309-001716
        git checkout 660df126323fe5533a1be7834e1754a1adc69f13
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   aarch64-linux-ld: mm/maccess.o: in function `copy_from_kernel_nofault':
>> maccess.c:(.text+0x340): undefined reference to `mte_async_mode'
   maccess.c:(.text+0x340): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
>> aarch64-linux-ld: maccess.c:(.text+0x344): undefined reference to `mte_async_mode'
   aarch64-linux-ld: maccess.c:(.text+0x44c): undefined reference to `mte_async_mode'
   maccess.c:(.text+0x44c): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   aarch64-linux-ld: maccess.c:(.text+0x450): undefined reference to `mte_async_mode'
   aarch64-linux-ld: maccess.c:(.text+0x474): undefined reference to `mte_async_mode'
   aarch64-linux-ld: mm/maccess.o:maccess.c:(.text+0x4d0): more undefined references to `mte_async_mode' follow
   mm/maccess.o: in function `copy_from_kernel_nofault':
   maccess.c:(.text+0x4d0): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   maccess.c:(.text+0x550): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   mm/maccess.o: in function `copy_to_kernel_nofault':
   maccess.c:(.text+0x6cc): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   maccess.c:(.text+0x7d8): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   maccess.c:(.text+0x864): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   maccess.c:(.text+0x8ec): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   mm/maccess.o: in function `strncpy_from_kernel_nofault':
   maccess.c:(.text+0xaac): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   fs/namei.o: in function `full_name_hash':
   namei.c:(.text+0x28): relocation truncated to fit: R_AARCH64_ADR_PREL_PG_HI21 against undefined symbol `mte_async_mode'
   fs/namei.o: in function `hashlen_string':
   namei.c:(.text+0x2a28): additional relocation overflows omitted from the output

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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