tree: https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git next head: e5fbadd1179cdadeaa44d71a9ec068c5bc100524 commit: 85f5afd4322d294a7eca0d304744a1646113fbd9 [39/40] efi/libstub: Use snprintf with %ls to convert the command line config: x86_64-defconfig (attached as .config) If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; New smatch warnings: drivers/firmware/efi/libstub/efi-stub-helper.c:265 efi_convert_cmdline() warn: qualifier 'l' ignored for %s specifier # https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git/commit/?id=85... git remote add efi https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git git remote update efi git checkout 85f5afd4322d294a7eca0d304744a1646113fbd9 vim +/l +265 drivers/firmware/efi/libstub/efi-stub-helper.c c625d1c203941f drivers/firmware/efi/efi-stub-helper.c H. Peter Anvin 2013-09-20 258 options_bytes++; /* NUL termination */ 9403e462fb5ffa drivers/firmware/efi/efi-stub-helper.c Leif Lindholm 2014-04-04 259 1e45bf7372c48c drivers/firmware/efi/libstub/efi-stub-helper.c Ard Biesheuvel 2020-02-10 260 status = efi_allocate_pages(options_bytes, &cmdline_addr, max_addr); 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 261 if (status != EFI_SUCCESS) 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 262 return NULL; 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 263 85f5afd4322d29 drivers/firmware/efi/libstub/efi-stub-helper.c Arvind Sankar 2020-05-18 264 snprintf((char *)cmdline_addr, options_bytes, "%.*ls", ^ The "l" doesn't make sense here? 85f5afd4322d29 drivers/firmware/efi/libstub/efi-stub-helper.c Arvind Sankar 2020-05-18 @265 options_bytes - 1, options); 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 266 c625d1c203941f drivers/firmware/efi/efi-stub-helper.c H. Peter Anvin 2013-09-20 267 *cmd_line_len = options_bytes; 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 268 return (char *)cmdline_addr; 5fef3870c572a3 drivers/firmware/efi/efi-stub-helper.c Roy Franz 2013-09-22 269 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org