linux-kernel - Re: [PATCH] x86/stackprotector: Work around strict Clang TLS symbol requirements

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Message-ID: <202410040122.shftyeMf-lkp@intel.com>
Date: Fri, 4 Oct 2024 01:55:55 +0800
From: kernel test robot <lkp@...el.com>
To: Ard Biesheuvel <ardb+git@...gle.com>, x86@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, llvm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
	stable@...r.kernel.org, Fangrui Song <i@...kray.me>,
	Brian Gerst <brgerst@...il.com>, Uros Bizjak <ubizjak@...il.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH] x86/stackprotector: Work around strict Clang TLS symbol
 requirements

Hi Ard,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/x86/core]
[also build test WARNING on tip/master linus/master tip/x86/asm v6.12-rc1 next-20241003]
[cannot apply to tip/auto-latest]
[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/Ard-Biesheuvel/x86-stackprotector-Work-around-strict-Clang-TLS-symbol-requirements/20241002-172733
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/20241002092534.3163838-2-ardb%2Bgit%40google.com
patch subject: [PATCH] x86/stackprotector: Work around strict Clang TLS symbol requirements
config: i386-randconfig-061-20241003 (https://download.01.org/0day-ci/archive/20241004/202410040122.shftyeMf-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241004/202410040122.shftyeMf-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/202410040122.shftyeMf-lkp@intel.com/

All warnings (new ones prefixed by >>, old ones prefixed by <<):

WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/locking/test-ww_mutex.o
WARNING: modpost: EXPORT symbol "__ref_stack_chk_guard" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ref_stack_chk_guard" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: "__ref_stack_chk_guard" [kernel/rcu/refscale.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [kernel/torture.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [fs/nfs/nfsv4.ko] has no CRC!
>> WARNING: modpost: "__ref_stack_chk_guard" [fs/unicode/utf8-selftest.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [fs/smb/client/cifs.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [crypto/gcm.ko] has no CRC!
>> WARNING: modpost: "__ref_stack_chk_guard" [lib/kunit/kunit-test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/string_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/string_helpers_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/test_hexdump.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/test_hash.ko] has no CRC!
>> WARNING: modpost: "__ref_stack_chk_guard" [lib/test_printf.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/test_scanf.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/test_bitmap.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/test_uuid.ko] has no CRC!
>> WARNING: modpost: "__ref_stack_chk_guard" [lib/cmdline_kunit.ko] has no CRC!
>> WARNING: modpost: "__ref_stack_chk_guard" [lib/memcpy_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/overflow_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/stackinit_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/fortify_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [lib/siphash_kunit.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/gpu/drm/tests/drm_cmdline_parser_test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/gpu/drm/tests/drm_connector_test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/gpu/drm/tests/drm_format_helper_test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/gpu/drm/display/drm_display_helper.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/base/test/property-entry-test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [drivers/power/supply/test_power.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [net/mptcp/mptcp_crypto_test.ko] has no CRC!
WARNING: modpost: "__ref_stack_chk_guard" [net/dns_resolver/dns_resolver.ko] has no CRC!

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