linux-hardening - Re: [PATCH 6/9] fortify: Split reporting and avoid passing string pointer

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Date:   Thu, 6 Apr 2023 19:19:55 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>, linux-hardening@...r.kernel.org
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        Kees Cook <keescook@...omium.org>,
        Andy Shevchenko <andy@...nel.org>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Puyou Lu <puyou.lu@...il.com>, Mark Brown <broonie@...nel.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        David Gow <davidgow@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Alexander Potapenko <glider@...gle.com>,
        Zhaoyang Huang <zhaoyang.huang@...soc.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Liam Howlett <liam.howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Yury Norov <yury.norov@...il.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Sander Vanheule <sander@...nheule.net>,
        Eric Biggers <ebiggers@...gle.com>,
        "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 6/9] fortify: Split reporting and avoid passing string
 pointer

Hi Kees,

kernel test robot noticed the following build errors:

[auto build test ERROR on kees/for-next/hardening]
[also build test ERROR on kees/for-next/pstore kees/for-next/kspp akpm-mm/mm-everything linus/master v6.3-rc5 next-20230406]
[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/Kees-Cook/kunit-tool-Enable-CONFIG_FORTIFY_SOURCE-under-UML/20230406-081014
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
patch link:    https://lore.kernel.org/r/20230406000212.3442647-6-keescook%40chromium.org
patch subject: [PATCH 6/9] fortify: Split reporting and avoid passing string pointer
config: arm-randconfig-r025-20230403 (https://download.01.org/0day-ci/archive/20230406/202304061930.4Au0PASm-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/intel-lab-lkp/linux/commit/4fd520e6ee549e1ffe8859e26e57ea64b48e78ea
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kees-Cook/kunit-tool-Enable-CONFIG_FORTIFY_SOURCE-under-UML/20230406-081014
        git checkout 4fd520e6ee549e1ffe8859e26e57ea64b48e78ea
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304061930.4Au0PASm-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: __fortify_panic
   >>> referenced by fortify-string.h:208 (include/linux/fortify-string.h:208)
   >>>               arch/arm/boot/compressed/fdt_ro.o:(fdt_stringlist_count)
   >>> referenced by fortify-string.h:208 (include/linux/fortify-string.h:208)
   >>>               arch/arm/boot/compressed/fdt_ro.o:(fdt_stringlist_search)
   >>> referenced by fortify-string.h:208 (include/linux/fortify-string.h:208)
   >>>               arch/arm/boot/compressed/fdt_ro.o:(fdt_stringlist_get)

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