tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git set_fs head: 0a081326831928b0d739bce68b8c0f9138b9c8ba commit: a954036380ae20dbfa0c203bf6cafb21d1f3cedd [6/11] uaccess: generalize access_ok() config: csky-randconfig-s032-20220211 (https://download.01.org/0day-ci/archive/20220212/202202121334.YatMsSbt-lk...) 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/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground set_fs git checkout a954036380ae20dbfa0c203bf6cafb21d1f3cedd # 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(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/csky/kernel/signal.c:142:15: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct rt_sigframe *frame @@ got void [noderef] __user * @@ arch/csky/kernel/signal.c:142:15: sparse: expected struct rt_sigframe *frame arch/csky/kernel/signal.c:142:15: sparse: got void [noderef] __user * arch/csky/kernel/signal.c:143:14: sparse: expected void const [noderef] __user *ptr arch/csky/kernel/signal.c:143:14: sparse: got struct rt_sigframe *frame arch/csky/kernel/signal.c:146:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct siginfo [noderef] [usertype] __user *to @@ got struct siginfo * @@ arch/csky/kernel/signal.c:146:38: sparse: expected struct siginfo [noderef] [usertype] __user *to arch/csky/kernel/signal.c:146:38: sparse: got struct siginfo * arch/csky/kernel/signal.c:149:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned long * @@ arch/csky/kernel/signal.c:149:16: sparse: expected void const volatile [noderef] __user *ptr arch/csky/kernel/signal.c:149:16: sparse: got unsigned long * arch/csky/kernel/signal.c:149:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __user *ptr @@ got unsigned long * @@ arch/csky/kernel/signal.c:149:16: sparse: expected void [noderef] __user *ptr arch/csky/kernel/signal.c:149:16: sparse: got unsigned long * arch/csky/kernel/signal.c:150:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got struct ucontext ** @@ arch/csky/kernel/signal.c:150:16: sparse: expected void const volatile [noderef] __user *ptr arch/csky/kernel/signal.c:150:16: sparse: got struct ucontext ** arch/csky/kernel/signal.c:150:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __user *ptr @@ got struct ucontext ** @@ arch/csky/kernel/signal.c:150:16: sparse: expected void [noderef] __user *ptr arch/csky/kernel/signal.c:150:16: sparse: got struct ucontext ** arch/csky/kernel/signal.c:151:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sigaltstack [noderef] [usertype] __user * @@ got struct sigaltstack * @@ arch/csky/kernel/signal.c:151:33: sparse: expected struct sigaltstack [noderef] [usertype] __user * arch/csky/kernel/signal.c:151:33: sparse: got struct sigaltstack * arch/csky/kernel/signal.c:152:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct rt_sigframe [noderef] __user *frame @@ got struct rt_sigframe *frame @@ arch/csky/kernel/signal.c:152:33: sparse: expected struct rt_sigframe [noderef] __user *frame arch/csky/kernel/signal.c:152:33: sparse: got struct rt_sigframe *frame arch/csky/kernel/signal.c:153:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __user *to @@ got struct sigset_t * @@ arch/csky/kernel/signal.c:153:32: sparse: expected void [noderef] __user *to arch/csky/kernel/signal.c:153:32: sparse: got struct sigset_t * arch/csky/kernel/signal.c: note: in included file: include/linux/uaccess.h:107:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *from @@ got void const [noderef] __user *from @@ include/linux/uaccess.h:107:39: sparse: expected void const *from include/linux/uaccess.h:107:39: sparse: got void const [noderef] __user *from include/linux/uaccess.h:141:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *to @@ got void [noderef] __user *to @@ include/linux/uaccess.h:141:33: sparse: expected void *to include/linux/uaccess.h:141:33: sparse: got void [noderef] __user *to include/linux/uaccess.h:107:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *from @@ got void const [noderef] __user *from @@ include/linux/uaccess.h:107:39: sparse: expected void const *from include/linux/uaccess.h:107:39: sparse: got void const [noderef] __user *from include/linux/uaccess.h:107:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *from @@ got void const [noderef] __user *from @@ include/linux/uaccess.h:107:39: sparse: expected void const *from include/linux/uaccess.h:107:39: sparse: got void const [noderef] __user *from include/linux/uaccess.h:141:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *to @@ got void [noderef] __user *to @@ include/linux/uaccess.h:141:33: sparse: expected void *to include/linux/uaccess.h:141:33: sparse: got void [noderef] __user *to arch/csky/kernel/signal.c: note: in included file (through include/linux/uaccess.h): arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: cast removes address space '__user' of expression arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: asm output is not an lvalue arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: cast removes address space '__user' of expression arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: cast removes address space '__user' of expression arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: asm output is not an lvalue arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: cast removes address space '__user' of expression arch/csky/kernel/signal.c: note: in included file: include/linux/uaccess.h:141:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *to @@ got void [noderef] __user *to @@ include/linux/uaccess.h:141:33: sparse: expected void *to include/linux/uaccess.h:141:33: sparse: got void [noderef] __user *to arch/csky/kernel/signal.c: note: in included file (through include/linux/uaccess.h): arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: generating address of non-lvalue (11) arch/csky/include/asm/uaccess.h:112:17: sparse: sparse: generating address of non-lvalue (11) vim +143 arch/csky/kernel/signal.c e9564df753fd54 Guo Ren 2018-09-05 135 e9564df753fd54 Guo Ren 2018-09-05 136 static int e9564df753fd54 Guo Ren 2018-09-05 137 setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) e9564df753fd54 Guo Ren 2018-09-05 138 { e9564df753fd54 Guo Ren 2018-09-05 139 struct rt_sigframe *frame; e9564df753fd54 Guo Ren 2018-09-05 140 int err = 0; e9564df753fd54 Guo Ren 2018-09-05 141 bf241682936293 Guo Ren 2019-04-01 @142 frame = get_sigframe(ksig, regs, sizeof(*frame)); bf241682936293 Guo Ren 2019-04-01 @143 if (!access_ok(frame, sizeof(*frame))) bf241682936293 Guo Ren 2019-04-01 144 return -EFAULT; e9564df753fd54 Guo Ren 2018-09-05 145 e9564df753fd54 Guo Ren 2018-09-05 146 err |= copy_siginfo_to_user(&frame->info, &ksig->info); e9564df753fd54 Guo Ren 2018-09-05 147 e9564df753fd54 Guo Ren 2018-09-05 148 /* Create the ucontext. */ e9564df753fd54 Guo Ren 2018-09-05 149 err |= __put_user(0, &frame->uc.uc_flags); bf241682936293 Guo Ren 2019-04-01 150 err |= __put_user(NULL, &frame->uc.uc_link); bf241682936293 Guo Ren 2019-04-01 151 err |= __save_altstack(&frame->uc.uc_stack, regs->usp); bf241682936293 Guo Ren 2019-04-01 152 err |= setup_sigcontext(frame, regs); bf241682936293 Guo Ren 2019-04-01 153 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); e9564df753fd54 Guo Ren 2018-09-05 154 if (err) bf241682936293 Guo Ren 2019-04-01 155 return -EFAULT; e9564df753fd54 Guo Ren 2018-09-05 156 bf241682936293 Guo Ren 2019-04-01 157 /* Set up to return from userspace. */ 87f3248cdb9aea Guo Ren 2021-01-04 158 regs->lr = (unsigned long)VDSO_SYMBOL( 87f3248cdb9aea Guo Ren 2021-01-04 159 current->mm->context.vdso, rt_sigreturn); e9564df753fd54 Guo Ren 2018-09-05 160 bf241682936293 Guo Ren 2019-04-01 161 /* bf241682936293 Guo Ren 2019-04-01 162 * Set up registers for signal handler. bf241682936293 Guo Ren 2019-04-01 163 * Registers that we don't modify keep the value they had from bf241682936293 Guo Ren 2019-04-01 164 * user-space at the time we took the signal. bf241682936293 Guo Ren 2019-04-01 165 * We always pass siginfo and mcontext, regardless of SA_SIGINFO, bf241682936293 Guo Ren 2019-04-01 166 * since some things rely on this (e.g. glibc's debug/segfault.c). bf241682936293 Guo Ren 2019-04-01 167 */ bf241682936293 Guo Ren 2019-04-01 168 regs->pc = (unsigned long)ksig->ka.sa.sa_handler; bf241682936293 Guo Ren 2019-04-01 169 regs->usp = (unsigned long)frame; bf241682936293 Guo Ren 2019-04-01 170 regs->a0 = ksig->sig; /* a0: signal number */ bf241682936293 Guo Ren 2019-04-01 171 regs->a1 = (unsigned long)(&(frame->info)); /* a1: siginfo pointer */ bf241682936293 Guo Ren 2019-04-01 172 regs->a2 = (unsigned long)(&(frame->uc)); /* a2: ucontext pointer */ e9564df753fd54 Guo Ren 2018-09-05 173 bf241682936293 Guo Ren 2019-04-01 174 return 0; e9564df753fd54 Guo Ren 2018-09-05 175 } e9564df753fd54 Guo Ren 2018-09-05 176 :::::: The code at line 143 was first introduced by commit :::::: bf241682936293291dcf40fd93cdd0f5e6222902 csky: Reconstruct signal processing :::::: TO: Guo Ren <ren_guo(a)c-sky.com&gt; :::::: CC: Guo Ren <ren_guo(a)c-sky.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org