tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git set_fs-3 head: 81ba80d2dbd7f4536edb20b54754ad03b910e4aa commit: 189d2606eda6b4611e560224718cd82dea30ffd0 [13/18] uaccess: generalize access_ok() config: csky-randconfig-s032-20220221 (https://download.01.org/0day-ci/archive/20220221/202202212337.Vmr94Qq8-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=189d2606eda6b4611e560224718cd82dea30ffd0 git remote add arnd-asm-generic https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git git fetch --no-tags arnd-asm-generic set_fs-3 git checkout 189d2606eda6b4611e560224718cd82dea30ffd0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=csky SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> arch/csky/kernel/perf_callchain.c:55:14: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned long *user_frame_tail @@ arch/csky/kernel/perf_callchain.c:55:14: sparse: expected void const [noderef] __user *ptr arch/csky/kernel/perf_callchain.c:55:14: sparse: got unsigned long *user_frame_tail arch/csky/kernel/perf_callchain.c:57:49: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *from @@ got unsigned long *user_frame_tail @@ arch/csky/kernel/perf_callchain.c:57:49: sparse: expected void const [noderef] __user *from arch/csky/kernel/perf_callchain.c:57:49: sparse: got unsigned long *user_frame_tail arch/csky/kernel/perf_callchain.c: note: in included file (through include/linux/sched/task.h, include/linux/sched/signal.h, include/linux/ptrace.h, ...): include/linux/uaccess.h:96:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *from @@ got void const [noderef] __user *from @@ include/linux/uaccess.h:96:39: sparse: expected void const *from include/linux/uaccess.h:96:39: sparse: got void const [noderef] __user *from vim +55 arch/csky/kernel/perf_callchain.c cfa4d93b977a1b Mao Han 2019-02-21 42 cfa4d93b977a1b Mao Han 2019-02-21 43 /* cfa4d93b977a1b Mao Han 2019-02-21 44 * Get the return address for a single stackframe and return a pointer to the cfa4d93b977a1b Mao Han 2019-02-21 45 * next frame tail. cfa4d93b977a1b Mao Han 2019-02-21 46 */ cfa4d93b977a1b Mao Han 2019-02-21 47 static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry, cfa4d93b977a1b Mao Han 2019-02-21 48 unsigned long fp, unsigned long reg_lr) cfa4d93b977a1b Mao Han 2019-02-21 49 { cfa4d93b977a1b Mao Han 2019-02-21 50 struct stackframe buftail; cfa4d93b977a1b Mao Han 2019-02-21 51 unsigned long lr = 0; cfa4d93b977a1b Mao Han 2019-02-21 52 unsigned long *user_frame_tail = (unsigned long *)fp; cfa4d93b977a1b Mao Han 2019-02-21 53 cfa4d93b977a1b Mao Han 2019-02-21 54 /* Check accessibility of one struct frame_tail beyond */ cfa4d93b977a1b Mao Han 2019-02-21 @55 if (!access_ok(user_frame_tail, sizeof(buftail))) cfa4d93b977a1b Mao Han 2019-02-21 56 return 0; cfa4d93b977a1b Mao Han 2019-02-21 57 if (__copy_from_user_inatomic(&buftail, user_frame_tail, cfa4d93b977a1b Mao Han 2019-02-21 58 sizeof(buftail))) cfa4d93b977a1b Mao Han 2019-02-21 59 return 0; cfa4d93b977a1b Mao Han 2019-02-21 60 cfa4d93b977a1b Mao Han 2019-02-21 61 if (reg_lr != 0) cfa4d93b977a1b Mao Han 2019-02-21 62 lr = reg_lr; cfa4d93b977a1b Mao Han 2019-02-21 63 else cfa4d93b977a1b Mao Han 2019-02-21 64 lr = buftail.lr; cfa4d93b977a1b Mao Han 2019-02-21 65 cfa4d93b977a1b Mao Han 2019-02-21 66 fp = buftail.fp; cfa4d93b977a1b Mao Han 2019-02-21 67 perf_callchain_store(entry, lr); cfa4d93b977a1b Mao Han 2019-02-21 68 cfa4d93b977a1b Mao Han 2019-02-21 69 return fp; cfa4d93b977a1b Mao Han 2019-02-21 70 } cfa4d93b977a1b Mao Han 2019-02-21 71 :::::: The code at line 55 was first introduced by commit :::::: cfa4d93b977a1b1129e7207d11b5daecdf0c56c4 csky: Add perf callchain support :::::: TO: Mao Han <han_mao@xxxxxxxxx> :::::: CC: Guo Ren <ren_guo@xxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
