[linux-next:master 11937/12481] mm/kasan/kasan_test_c.c:48:6: sparse: sparse: symbol 'kasan_ptr_result' was not declared. Should it be static?

[linux-next:master 11937/12481] mm/kasan/kasan_test_c.c:48:6: sparse: sparse: symbol 'kasan_ptr_result' was not declared. Should it be static?

[kernel test robot]

Hi Matthew,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   62f92d634458a1e308bb699986b9147a6d670457
commit: a2f11547052001bd448ccec81dd1e68409078fbb [11937/12481] kasan: rust: Add KASAN smoke test via UAF
config: x86_64-randconfig-123-20240920 (https://download.01.org/0day-ci/archive/20240920/202409201822.CVGhLWKs-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240920/202409201822.CVGhLWKs-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409201822.CVGhLWKs-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/kasan/kasan_test_c.c:48:6: sparse: sparse: symbol 'kasan_ptr_result' was not declared. Should it be static?
>> mm/kasan/kasan_test_c.c:49:5: sparse: sparse: symbol 'kasan_int_result' was not declared. Should it be static?

vim +/kasan_ptr_result +48 mm/kasan/kasan_test_c.c

7ce0ea19d50e4e mm/kasan/kasan_test.c Andrey Konovalov 2022-09-27  43  
adb72ae1915db2 lib/test_kasan.c      Daniel Axtens    2020-06-03  44  /*
0fd379253691e7 lib/test_kasan.c      Andrey Konovalov 2021-02-24  45   * Some tests use these global variables to store return values from function
0fd379253691e7 lib/test_kasan.c      Andrey Konovalov 2021-02-24  46   * calls that could otherwise be eliminated by the compiler as dead code.
adb72ae1915db2 lib/test_kasan.c      Daniel Axtens    2020-06-03  47   */
adb72ae1915db2 lib/test_kasan.c      Daniel Axtens    2020-06-03 @48  void *kasan_ptr_result;
83c4e7a0363bdb lib/test_kasan.c      Patricia Alfonso 2020-10-13 @49  int kasan_int_result;
83c4e7a0363bdb lib/test_kasan.c      Patricia Alfonso 2020-10-13  50  

:::::: The code at line 48 was first introduced by commit
:::::: adb72ae1915db28f934e9e02c18bfcea2f3ed3b7 kasan: stop tests being eliminated as dead code with FORTIFY_SOURCE

:::::: TO: Daniel Axtens <dja@axtens.net>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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