tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: 54c65110c185a2f0d6dfd73bf24453ebef14e874 commit: 6a13b2280d95f4bb4b064083d150fd60a31baf27 [9/49] MIPS: Fix malformed NT_FILE and NT_SIGINFO in 32bit coredumps config: mips-nlm_xlp_defconfig (attached as .config) compiler: mips64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.4 git checkout 6a13b2280d95f4bb4b064083d150fd60a31baf27 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/mips/kernel/binfmt_elfn32.c:113: arch/mips/kernel/../../../fs/binfmt_elf.c: In function 'fill_siginfo_note': 1564 | copy_siginfo_to_user((user_siginfo_t __user *) csigdata, siginfo); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | compat_siginfo_t * {aka struct compat_siginfo *} In file included from include/uapi/linux/elfcore.h:6, from include/linux/elfcore.h:10, from arch/mips/kernel/binfmt_elfn32.c:42: include/linux/signal.h:27:44: note: expected 'siginfo_t *' {aka 'struct siginfo *'} but argument is of type 'compat_siginfo_t *' {aka 'struct compat_siginfo *'} 27 | int copy_siginfo_to_user(siginfo_t __user *to, const kernel_siginfo_t *from); | ~~~~~~~~~~~~~~~~~~^~ cc1: some warnings being treated as errors vim +/copy_siginfo_to_user +1564 arch/mips/kernel/../../../fs/binfmt_elf.c 3aba481fc94d83ff Roland McGrath 2008-01-30 1558 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1559 static void fill_siginfo_note(struct memelfnote *note, user_siginfo_t *csigdata, ae7795bc6187a15e Eric W. Biederman 2018-09-25 1560 const kernel_siginfo_t *siginfo) 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1561 { 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1562 mm_segment_t old_fs = get_fs(); 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1563 set_fs(KERNEL_DS); 49ae4d4b113be03d Denys Vlasenko 2012-10-04 @1564 copy_siginfo_to_user((user_siginfo_t __user *) csigdata, siginfo); 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1565 set_fs(old_fs); 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1566 fill_note(note, "CORE", NT_SIGINFO, sizeof(*csigdata), csigdata); 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1567 } 49ae4d4b113be03d Denys Vlasenko 2012-10-04 1568 :::::: The code at line 1564 was first introduced by commit :::::: 49ae4d4b113be03dc4a2ec5f2a1f573ff0fcddb3 coredump: add a new elf note with siginfo of the signal :::::: TO: Denys Vlasenko <vda.linux(a)googlemail.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org