linux-kernel - ld.lld: warning: call to __read_overflow2_field marked "dontcall-warn": detected read beyond size of field (2nd parameter); maybe use struct

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Message-ID: <202212031937.cAsKoF9s-lkp@intel.com>
Date:   Sat, 3 Dec 2022 19:37:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: ld.lld: warning: call to __read_overflow2_field marked
 "dontcall-warn": detected read beyond size of field (2nd parameter); maybe
 use struct_group()?

Hi Kees,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   97ee9d1c16963375eefdf964c429897d27e28956
commit: 281d0c962752fb40866dd8d4cade68656f34bd1f fortify: Add Clang support
date:   10 months ago
config: arm64-randconfig-r015-20221202
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
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=281d0c962752fb40866dd8d4cade68656f34bd1f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 281d0c962752fb40866dd8d4cade68656f34bd1f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> ld.lld: warning: call to __read_overflow2_field marked "dontcall-warn": detected read beyond size of field (2nd parameter); maybe use struct_group()?
>> ld.lld: warning: call to __read_overflow2_field marked "dontcall-warn": detected read beyond size of field (2nd parameter); maybe use struct_group()?

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

View attachment "config" of type "text/plain" (190526 bytes)