tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/wip-rwx head: f856355fba969168555e518db3906492f8ab5b03 commit: a1814c413b9cffdc5e4b3bd098c2ad0f8578dc5f [4/10] s390/module: Use s390_kernel_write() for relocations config: s390-allyesconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a1814c413b9cffdc5e4b3bd098c2ad0f8578dc5f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/s390/kernel/module.c: In function 'apply_rela_bits': arch/s390/kernel/module.c:199:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 199 | write(loc, &val, 1); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:199:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c:203:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 203 | write(loc, &tmp, 2); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:203:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c:205:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 205 | write(loc, &val, 2); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:205:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c:209:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 209 | write(loc, &tmp, 4); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:209:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c:211:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 211 | write(loc, &val, 4); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:211:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c:213:9: warning: passing argument 1 of 'write' makes pointer from integer without a cast [-Wint-conversion] 213 | write(loc, &val, 8); | ^~~ | | | Elf64_Addr {aka long long unsigned int} arch/s390/kernel/module.c:213:9: note: expected 'void *' but argument is of type 'Elf64_Addr' {aka 'long long unsigned int'} arch/s390/kernel/module.c: In function '__apply_relocate_add': 438 | rc = apply_rela(rela, base, symtab, strtab, me); | ^~~~~~~~~~ arch/s390/kernel/module.c:218:12: note: declared here 218 | static int apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab, | ^~~~~~~~~~ arch/s390/kernel/module.c: In function 'apply_relocate_add': arch/s390/kernel/module.c:453:24: warning: pointer type mismatch in conditional expression 453 | early ? memcpy : s390_kernel_write); | ^ arch/s390/kernel/module.c:449:6: warning: unused variable 'ret' [-Wunused-variable] 449 | int ret; | ^~~ vim +/apply_rela +438 arch/s390/kernel/module.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 418 a1814c413b9cff Peter Zijlstra 2020-04-14 419 static int __apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, ^1da177e4c3f41 Linus Torvalds 2005-04-16 420 unsigned int symindex, unsigned int relsec, a1814c413b9cff Peter Zijlstra 2020-04-14 421 struct module *me, a1814c413b9cff Peter Zijlstra 2020-04-14 422 void (*write)(void *dest, const void *src, size_t len)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 423 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 424 Elf_Addr base; ^1da177e4c3f41 Linus Torvalds 2005-04-16 425 Elf_Sym *symtab; ^1da177e4c3f41 Linus Torvalds 2005-04-16 426 Elf_Rela *rela; ^1da177e4c3f41 Linus Torvalds 2005-04-16 427 unsigned long i, n; ^1da177e4c3f41 Linus Torvalds 2005-04-16 428 int rc; ^1da177e4c3f41 Linus Torvalds 2005-04-16 429 ^1da177e4c3f41 Linus Torvalds 2005-04-16 430 DEBUGP("Applying relocate section %u to %u\n", ^1da177e4c3f41 Linus Torvalds 2005-04-16 431 relsec, sechdrs[relsec].sh_info); ^1da177e4c3f41 Linus Torvalds 2005-04-16 432 base = sechdrs[sechdrs[relsec].sh_info].sh_addr; ^1da177e4c3f41 Linus Torvalds 2005-04-16 433 symtab = (Elf_Sym *) sechdrs[symindex].sh_addr; ^1da177e4c3f41 Linus Torvalds 2005-04-16 434 rela = (Elf_Rela *) sechdrs[relsec].sh_addr; ^1da177e4c3f41 Linus Torvalds 2005-04-16 435 n = sechdrs[relsec].sh_size / sizeof(Elf_Rela); ^1da177e4c3f41 Linus Torvalds 2005-04-16 436 ^1da177e4c3f41 Linus Torvalds 2005-04-16 437 for (i = 0; i < n; i++, rela++) { 083e14c09b7ae0 Martin Schwidefsky 2013-01-11 @438 rc = apply_rela(rela, base, symtab, strtab, me); ^1da177e4c3f41 Linus Torvalds 2005-04-16 439 if (rc) ^1da177e4c3f41 Linus Torvalds 2005-04-16 440 return rc; ^1da177e4c3f41 Linus Torvalds 2005-04-16 441 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 442 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 443 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 444 :::::: The code at line 438 was first introduced by commit :::::: 083e14c09b7ae0247b9944a386fdc32cd0719da1 s390/modules: add relocation overflow checking :::::: TO: Martin Schwidefsky <schwidefsky(a)de.ibm.com&gt; :::::: CC: Martin Schwidefsky <schwidefsky(a)de.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org