tree: git://git.infradead.org/users/hch/misc.git set_fs-removal head: 8783f2261aa42693c0e738e22036228c2b26d782 commit: 1d7ac476a3ca018b4c1dc83615cae3e0693e0d71 [80/83] powerpc: remove address space overrides using set_fs() config: powerpc64-randconfig-r005-20200615 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3d8149c2a1228609fd7d7c91a04681304a2f0ca9) 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 # install powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu git checkout 1d7ac476a3ca018b4c1dc83615cae3e0693e0d71 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from arch/powerpc/kernel/ptrace/ptrace.c:18: if (!access_ok(data, size)) ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:37:3: note: expanded from macro 'access_ok' __access_ok((unsigned long)(addr), (size), TASK_SIZE_MAX - 1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:20:34: note: expanded from macro '__access_ok' (((addr) <= (limit)) && ((size) <= (limit))) ~~~~~~ ^ ~~~~~~~ In file included from arch/powerpc/kernel/ptrace/ptrace.c:18: include/linux/regset.h:402:7: error: result of comparison of constant 70368744177663 with expression of type 'unsigned int' is always true [-Werror,-Wtautological-constant-out-of-range-compare] if (!access_ok(data, size)) ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:37:3: note: expanded from macro 'access_ok' __access_ok((unsigned long)(addr), (size), TASK_SIZE_MAX - 1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:20:34: note: expanded from macro '__access_ok' (((addr) <= (limit)) && ((size) <= (limit))) ~~~~~~ ^ ~~~~~~~ In file included from arch/powerpc/kernel/ptrace/ptrace.c:19: In file included from include/linux/tracehook.h:50: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:23:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_RET(inb, u8, (unsigned long port), (port), pio, port) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:592:9: note: expanded from macro 'DEF_PCI_AC_RET' return __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:20:1: note: expanded from here __do_inb ^ arch/powerpc/include/asm/io.h:523:53: note: expanded from macro '__do_inb' #define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port); ~~~~~~~~~~~~~~~~~~~~~ ^ In file included from arch/powerpc/kernel/ptrace/ptrace.c:19: In file included from include/linux/tracehook.h:50: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:24:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_RET(inw, u16, (unsigned long port), (port), pio, port) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:592:9: note: expanded from macro 'DEF_PCI_AC_RET' return __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:22:1: note: expanded from here __do_inw ^ arch/powerpc/include/asm/io.h:524:53: note: expanded from macro '__do_inw' #define __do_inw(port) readw((PCI_IO_ADDR)_IO_BASE + port); ~~~~~~~~~~~~~~~~~~~~~ ^ In file included from arch/powerpc/kernel/ptrace/ptrace.c:19: In file included from include/linux/tracehook.h:50: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:25:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_RET(inl, u32, (unsigned long port), (port), pio, port) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:592:9: note: expanded from macro 'DEF_PCI_AC_RET' return __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:24:1: note: expanded from here __do_inl ^ arch/powerpc/include/asm/io.h:525:53: note: expanded from macro '__do_inl' #define __do_inl(port) readl((PCI_IO_ADDR)_IO_BASE + port); ~~~~~~~~~~~~~~~~~~~~~ ^ In file included from arch/powerpc/kernel/ptrace/ptrace.c:19: In file included from include/linux/tracehook.h:50: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:26:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outb, (u8 val, unsigned long port), (val, port), pio, port) -- In file included from arch/powerpc/kernel/ptrace/ptrace-view.c:3: if (!access_ok(data, size)) ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:37:3: note: expanded from macro 'access_ok' __access_ok((unsigned long)(addr), (size), TASK_SIZE_MAX - 1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:20:34: note: expanded from macro '__access_ok' (((addr) <= (limit)) && ((size) <= (limit))) ~~~~~~ ^ ~~~~~~~ In file included from arch/powerpc/kernel/ptrace/ptrace-view.c:3: include/linux/regset.h:402:7: error: result of comparison of constant 70368744177663 with expression of type 'unsigned int' is always true [-Werror,-Wtautological-constant-out-of-range-compare] if (!access_ok(data, size)) ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:37:3: note: expanded from macro 'access_ok' __access_ok((unsigned long)(addr), (size), TASK_SIZE_MAX - 1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:20:34: note: expanded from macro '__access_ok' (((addr) <= (limit)) && ((size) <= (limit))) ~~~~~~ ^ ~~~~~~~ 2 errors generated. -- In file included from include/linux/sched/isolation.h:6: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:21: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:191:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel//sched/core.c:9: In file included from kernel//sched/sched.h:17: In file included from include/linux/sched/isolation.h:6: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:21: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:193:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel//sched/core.c:9: In file included from kernel//sched/sched.h:17: In file included from include/linux/sched/isolation.h:6: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:21: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:195:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel//sched/core.c:9: In file included from kernel//sched/sched.h:17: In file included from include/linux/sched/isolation.h:6: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:21: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:197:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel//sched/core.c:9: In file included from kernel//sched/sched.h:17: In file included from include/linux/sched/isolation.h:6: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:21: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:199:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ kernel//sched/core.c:2117:6: warning: no previous prototype for function 'sched_set_stop_task' [-Wmissing-prototypes] void sched_set_stop_task(int cpu, struct task_struct *stop) ^ kernel//sched/core.c:2117:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sched_set_stop_task(int cpu, struct task_struct *stop) ^ static if (!access_ok(uattr, usize)) ^~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:37:3: note: expanded from macro 'access_ok' __access_ok((unsigned long)(addr), (size), TASK_SIZE_MAX - 1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:20:34: note: expanded from macro '__access_ok' (((addr) <= (limit)) && ((size) <= (limit))) ~~~~~~ ^ ~~~~~~~ kernel//sched/core.c:808:28: warning: unused function 'uclamp_bucket_base_value' [-Wunused-function] static inline unsigned int uclamp_bucket_base_value(unsigned int clamp_value) ^ kernel//sched/core.c:3816:20: warning: unused function 'sched_tick_stop' [-Wunused-function] static inline void sched_tick_stop(int cpu) { } ^ 16 warnings generated. vim +376 include/linux/regset.h bae3f7c39dee59 Roland McGrath 2008-01-30 355 5bde4d181793be Roland McGrath 2008-01-30 356 /** 5bde4d181793be Roland McGrath 2008-01-30 357 * copy_regset_to_user - fetch a thread's user_regset data into user memory 5bde4d181793be Roland McGrath 2008-01-30 358 * @target: thread to be examined 5bde4d181793be Roland McGrath 2008-01-30 359 * @view: &struct user_regset_view describing user thread machine state 5bde4d181793be Roland McGrath 2008-01-30 360 * @setno: index in @view->regsets 5bde4d181793be Roland McGrath 2008-01-30 361 * @offset: offset into the regset data, in bytes 5bde4d181793be Roland McGrath 2008-01-30 362 * @size: amount of data to copy, in bytes 5bde4d181793be Roland McGrath 2008-01-30 363 * @data: user-mode pointer to copy into 5bde4d181793be Roland McGrath 2008-01-30 364 */ 5bde4d181793be Roland McGrath 2008-01-30 365 static inline int copy_regset_to_user(struct task_struct *target, 5bde4d181793be Roland McGrath 2008-01-30 366 const struct user_regset_view *view, 5bde4d181793be Roland McGrath 2008-01-30 367 unsigned int setno, 5bde4d181793be Roland McGrath 2008-01-30 368 unsigned int offset, unsigned int size, 5bde4d181793be Roland McGrath 2008-01-30 369 void __user *data) 5bde4d181793be Roland McGrath 2008-01-30 370 { 5bde4d181793be Roland McGrath 2008-01-30 371 const struct user_regset *regset = &view->regsets[setno]; 5bde4d181793be Roland McGrath 2008-01-30 372 c8e252586f8d5d H. Peter Anvin 2012-03-02 373 if (!regset->get) c8e252586f8d5d H. Peter Anvin 2012-03-02 374 return -EOPNOTSUPP; c8e252586f8d5d H. Peter Anvin 2012-03-02 375 96d4f267e40f95 Linus Torvalds 2019-01-03 @376 if (!access_ok(data, size)) 5189fa19a4b2b4 H. Peter Anvin 2012-03-02 377 return -EFAULT; 5bde4d181793be Roland McGrath 2008-01-30 378 5bde4d181793be Roland McGrath 2008-01-30 379 return regset->get(target, regset, offset, size, NULL, data); 5bde4d181793be Roland McGrath 2008-01-30 380 } 5bde4d181793be Roland McGrath 2008-01-30 381 :::::: The code at line 376 was first introduced by commit :::::: 96d4f267e40f9509e8a66e2b39e8b95655617693 Remove 'type' argument from access_ok() function :::::: TO: Linus Torvalds <torvalds(a)linux-foundation.org&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