linux-kernel - ERROR: modpost: "__ubsan_handle_add_overflow" [fs/hostfs/hostfs.ko] undefined!

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Message-ID: <202505241410.cTEnLlJ7-lkp@intel.com>
Date: Sat, 24 May 2025 14:46:26 +0800
From: kernel test robot <lkp@...el.com>
To: Kees Cook <kees@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Justin Stitt <justinstitt@...gle.com>
Subject: ERROR: modpost: "__ubsan_handle_add_overflow" [fs/hostfs/hostfs.ko]
 undefined!

Hi Kees,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4856ebd997159f198e3177e515bda01143727463
commit: 47f4af43e7c0cf702d6a6321542f0c0d9c4216e3 ubsan/overflow: Enable ignorelist parsing and add type filter
date:   3 months ago
config: um-randconfig-r061-20250524 (https://download.01.org/0day-ci/archive/20250524/202505241410.cTEnLlJ7-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250524/202505241410.cTEnLlJ7-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505241410.cTEnLlJ7-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "__ubsan_handle_add_overflow" [fs/hostfs/hostfs.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_sub_overflow" [fs/hostfs/hostfs.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_sub_overflow" [fs/configfs/configfs.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_add_overflow" [fs/configfs/configfs.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_sub_overflow" [fs/exfat/exfat.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_add_overflow" [fs/autofs/autofs4.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_add_overflow" [fs/zonefs/zonefs.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_sub_overflow" [crypto/blake2b_generic.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_add_overflow" [crypto/blake2b_generic.ko] undefined!
>> ERROR: modpost: "__ubsan_handle_mul_overflow" [crypto/blake2b_generic.ko] undefined!
WARNING: modpost: suppressed 79 unresolved symbol warnings because there were too many)

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