From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com, Julia Lawall <julia.lawall@inria.fr>
Subject: lib/tests/overflow_kunit.c:637:13-14: WARNING: array_size is used later (line 644) to compute the same size
Date: Sun, 01 Feb 2026 16:54:19 +0800 [thread overview]
Message-ID: <202602011620.h8Kfb019-lkp@intel.com> (raw)
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Kees Cook <kees@kernel.org>
CC: David Gow <davidgow@google.com>
CC: Rae Moar <rmoar@google.com>
Hi Kees,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 162b42445b585cd89f45475848845db353539605
commit: db6fe4d61ece24193eb4d94a82d967501d53358c lib: Move KUnit tests into tests/ subdirectory
date: 12 months ago
:::::: branch date: 15 hours ago
:::::: commit date: 12 months ago
config: x86_64-randconfig-102-20260201 (https://download.01.org/0day-ci/archive/20260201/202602011620.h8Kfb019-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
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>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202602011620.h8Kfb019-lkp@intel.com/
cocci warnings: (new ones prefixed by >>)
>> lib/tests/overflow_kunit.c:637:13-14: WARNING: array_size is used later (line 644) to compute the same size
--
>> lib/tests/fortify_kunit.c:211:8-9: ERROR: reference preceded by free on line 208
lib/tests/fortify_kunit.c:213:8-9: ERROR: reference preceded by free on line 211
lib/tests/fortify_kunit.c:216:8-9: ERROR: reference preceded by free on line 213
lib/tests/fortify_kunit.c:218:8-9: ERROR: reference preceded by free on line 216
lib/tests/fortify_kunit.c:220:8-9: ERROR: reference preceded by free on line 218
lib/tests/fortify_kunit.c:223:8-9: ERROR: reference preceded by free on line 220
lib/tests/fortify_kunit.c:226:8-9: ERROR: reference preceded by free on line 223
lib/tests/fortify_kunit.c:228:8-9: ERROR: reference preceded by free on line 226
lib/tests/fortify_kunit.c:230:8-9: ERROR: reference preceded by free on line 228
lib/tests/fortify_kunit.c:233:8-9: ERROR: reference preceded by free on line 230
lib/tests/fortify_kunit.c:236:8-9: ERROR: reference preceded by free on line 233
lib/tests/fortify_kunit.c:242:8-9: ERROR: reference preceded by free on line 236
lib/tests/fortify_kunit.c:247:8-9: ERROR: reference preceded by free on line 242
lib/tests/fortify_kunit.c:252:8-9: ERROR: reference preceded by free on line 247
lib/tests/fortify_kunit.c:258:54-55: ERROR: reference preceded by free on line 252
lib/tests/fortify_kunit.c:377:9-10: ERROR: reference preceded by free on line 375
lib/tests/fortify_kunit.c:375:9-10: ERROR: reference preceded by free on line 377
vim +637 lib/tests/overflow_kunit.c
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 621
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 622 #define DEFINE_TEST_ALLOC(func, free_func, want_arg, want_gfp, want_node)\
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 623 static void test_ ## func (struct kunit *test, void *arg) \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 624 { \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 625 volatile size_t a = TEST_SIZE; \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 626 volatile size_t b = (SIZE_MAX / TEST_SIZE) + 1; \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 627 void *ptr; \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 628 \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 629 /* Tiny allocation test. */ \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 630 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, 1);\
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 631 KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 632 #func " failed regular allocation?!\n"); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 633 free ## want_arg (free_func, arg, ptr); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 634 \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 635 /* Wrapped allocation test. */ \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 636 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 @637 a * b); \
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 638 KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 639 #func " unexpectedly failed bad wrapping?!\n"); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 640 free ## want_arg (free_func, arg, ptr); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 641 \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 642 /* Saturated allocation test. */ \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 643 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 @644 array_size(a, b)); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 645 if (ptr) { \
617f55e20743fc lib/overflow_kunit.c Kees Cook 2022-02-16 646 KUNIT_FAIL(test, #func " missed saturation!\n"); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 647 free ## want_arg (free_func, arg, ptr); \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 648 } \
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 649 }
ca90800a91ba72 lib/test_overflow.c Kees Cook 2018-05-10 650
:::::: The code at line 637 was first introduced by commit
:::::: ca90800a91ba723d78ded634d037c1d2df8b54d6 test_overflow: Add memory allocation overflow tests
:::::: TO: Kees Cook <keescook@chromium.org>
:::::: CC: Kees Cook <keescook@chromium.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-02-01 8:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-01 8:54 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-04-08 6:17 lib/tests/overflow_kunit.c:637:13-14: WARNING: array_size is used later (line 644) to compute the same size kernel test robot
2025-12-22 12:21 kernel test robot
2025-05-24 1:35 kernel test robot
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