linux-kernel - Re: [PATCH v2 1/1] x86/elf: Add a new .note section containing Xfeatures information to x86 core files

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Date: Wed, 8 May 2024 07:40:57 +0800
From: kernel test robot <lkp@...el.com>
To: Vignesh Balasubramanian <vigbalas@....com>,
	linux-kernel@...r.kernel.org, linux-toolchains@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, mpe@...erman.id.au, npiggin@...il.com,
	christophe.leroy@...roup.eu, aneesh.kumar@...nel.org,
	naveen.n.rao@...ux.ibm.com, ebiederm@...ssion.com,
	keescook@...omium.org, x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org, bpetkov@....com,
	jinisusan.george@....com, matz@...e.de, binutils@...rceware.org,
	jhb@...ebsd.org, felix.willgerodt@...el.com,
	Vignesh Balasubramanian <vigbalas@....com>
Subject: Re: [PATCH v2 1/1] x86/elf: Add a new .note section containing
 Xfeatures information to x86 core files

Hi Vignesh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on kees/for-next/execve]
[also build test WARNING on tip/x86/core kees/for-next/pstore kees/for-next/kspp linus/master v6.9-rc7 next-20240507]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Vignesh-Balasubramanian/x86-elf-Add-a-new-note-section-containing-Xfeatures-information-to-x86-core-files/20240507-175615
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/execve
patch link:    https://lore.kernel.org/r/20240507095330.2674-2-vigbalas%40amd.com
patch subject: [PATCH v2 1/1] x86/elf: Add a new .note section containing Xfeatures information to x86 core files
config: i386-buildonly-randconfig-006-20240508 (https://download.01.org/0day-ci/archive/20240508/202405080715.hYQ1ae9v-lkp@intel.com/config)
compiler: gcc-8 (Ubuntu 8.4.0-3ubuntu2) 8.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240508/202405080715.hYQ1ae9v-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405080715.hYQ1ae9v-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/fpu/xstate.c:91:19: warning: 'owner_name' defined but not used [-Wunused-const-variable=]
    static const char owner_name[] = "LINUX";
                      ^~~~~~~~~~
   In file included from include/linux/string.h:369,
                    from arch/x86/include/asm/page_32.h:18,
                    from arch/x86/include/asm/page.h:14,
                    from arch/x86/include/asm/processor.h:20,
                    from arch/x86/include/asm/timex.h:5,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/compat.h:10,
                    from arch/x86/kernel/fpu/xstate.c:8:
   In function 'fortify_memcpy_chk',
       inlined from 'membuf_write.isra.6' at include/linux/regset.h:42:3,
       inlined from '__copy_xstate_to_uabi_buf' at arch/x86/kernel/fpu/xstate.c:1049:2:
   include/linux/fortify-string.h:562:4: warning: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()?
       __read_overflow2_field(q_size_field, size);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/owner_name +91 arch/x86/kernel/fpu/xstate.c

    90	
  > 91	static const char owner_name[] = "LINUX";
    92	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki