vmlinux.o: warning: objtool: uinput_str_to_user+0x153: unknown CFA base reg -1

vmlinux.o: warning: objtool: uinput_str_to_user+0x153: unknown CFA base reg -1

[kernel test robot]

:::::: 
:::::: Manual check reason: "only suspicious fbc files changed"
:::::: 

BCC: lkp@intel.com
CC: llvm@lists.linux.dev
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Josh Poimboeuf <jpoimboe@kernel.org>
CC: Peter Zijlstra <peterz@infradead.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fb4d33ab452ea254e2c319bac5703d1b56d895bf
commit: 0a7fb6f07e3ad497d31ae9a2082d2cacab43d54a objtool: Increase per-function WARN_FUNC() rate limit
date:   3 months ago
:::::: branch date: 3 hours ago
:::::: commit date: 3 months ago
config: x86_64-buildonly-randconfig-005-20250619 (https://download.01.org/0day-ci/archive/20250619/202506191210.Tb34eKpm-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250619/202506191210.Tb34eKpm-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/r/202506191210.Tb34eKpm-lkp@intel.com/

All warnings (new ones prefixed by >>):

   vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch+0xda: call to __msan_memset() with UACCESS enabled
   vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch_v1+0xf4: call to __msan_memset() with UACCESS enabled
   vmlinux.o: warning: objtool: nvmet_ctrl_state_show() falls through to next function nvmet_ctrl_host_traddr_open()
   vmlinux.o: warning: objtool: uinput_str_to_user+0x156: undefined stack state
>> vmlinux.o: warning: objtool: uinput_str_to_user+0x153: unknown CFA base reg -1

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