linux-kernel - vmlinux.o: warning: objtool: fat_ioctl_filldir+0x72c: stack state mismatch: cfa1=4+168 cfa2=4+160

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Message-ID: <202507110734.nbN9j4St-lkp@intel.com>
Date: Fri, 11 Jul 2025 07:59:38 +0800
From: kernel test robot <lkp@...el.com>
To: Tor Vic <torvic9@...lbox.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>
Subject: vmlinux.o: warning: objtool: fat_ioctl_filldir+0x72c: stack state
 mismatch: cfa1=4+168 cfa2=4+160

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bc9ff192a6c940d9a26e21a0a82f2667067aaf5f
commit: ea1dcca1de129dfdf145338a868648bc0e24717c x86/kbuild/64: Add the CONFIG_X86_NATIVE_CPU option to locally optimize the kernel with '-march=native'
date:   4 months ago
config: x86_64-buildonly-randconfig-003-20250711 (https://download.01.org/0day-ci/archive/20250711/202507110734.nbN9j4St-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250711/202507110734.nbN9j4St-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/202507110734.nbN9j4St-lkp@intel.com/

All warnings (new ones prefixed by >>):

   vmlinux.o: warning: objtool: ___bpf_prog_run+0x1e8: sibling call from callable instruction with modified stack frame
>> vmlinux.o: warning: objtool: fat_ioctl_filldir+0x72c: stack state mismatch: cfa1=4+168 cfa2=4+160
   vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch+0xde: call to __msan_memset() with UACCESS enabled
   vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch_v1+0xf3: call to __msan_memset() with UACCESS enabled
   vmlinux.o: warning: objtool: .text.aw_dev_dsp_update_cfg: unexpected end of section

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