Re: [PATCH 1/2] exec: Add KUnit test for bprm_stack_limits()

[kernel test robot <lkp@intel.com>]

Hi Kees,

kernel test robot noticed the following build errors:

[auto build test ERROR on kees/for-next/execve]
[also build test ERROR on kees/for-next/pstore kees/for-next/kspp brauner-vfs/vfs.all linus/master v6.9 next-20240520]
[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/exec-Avoid-pathological-argc-envc-and-bprm-p-values/20240520-101851
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/execve
patch link:    https://lore.kernel.org/r/20240520021615.741800-1-keescook%40chromium.org
patch subject: [PATCH 1/2] exec: Add KUnit test for bprm_stack_limits()
config: i386-randconfig-004-20240520 (https://download.01.org/0day-ci/archive/20240520/202405202157.xE9dP8fI-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240520/202405202157.xE9dP8fI-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/202405202157.xE9dP8fI-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: fs/exec.o: in function `exec_test_bprm_stack_limits':
>> fs/exec_test.c:98:(.text+0xdfc): undefined reference to `kunit_binary_assert_format'
>> ld: fs/exec_test.c:98:(.text+0xe0c): undefined reference to `__kunit_do_failed_assertion'
>> ld: fs/exec_test.c:99:(.text+0xe56): undefined reference to `kunit_binary_assert_format'
   ld: fs/exec_test.c:99:(.text+0xe66): undefined reference to `__kunit_do_failed_assertion'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for FB_IOMEM_HELPERS
   Depends on [n]: HAS_IOMEM [=y] && FB_CORE [=n]
   Selected by [m]:
   - DRM_XE_DISPLAY [=y] && HAS_IOMEM [=y] && DRM_XE [=m] && DRM_XE [=m]=m


vim +98 fs/exec_test.c

    85	
    86	static void exec_test_bprm_stack_limits(struct kunit *test)
    87	{
    88		/* Double-check the constants. */
    89		KUNIT_EXPECT_EQ(test, _STK_LIM, SZ_8M);
    90		KUNIT_EXPECT_EQ(test, ARG_MAX, 32 * SZ_4K);
    91	
    92		for (int i = 0; i < ARRAY_SIZE(bprm_stack_limits_results); i++) {
    93			const struct bprm_stack_limits_result *result = &bprm_stack_limits_results[i];
    94			struct linux_binprm bprm = result->bprm;
    95			int rc;
    96	
    97			rc = bprm_stack_limits(&bprm);
  > 98			KUNIT_EXPECT_EQ_MSG(test, rc, result->expected_rc, "on loop %d", i);
  > 99			KUNIT_EXPECT_EQ_MSG(test, bprm.argmin, result->expected_argmin, "on loop %d", i);
   100		}
   101	}
   102	

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