arch/csky/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 1 (different address spaces)

From: kernel test robot
Date: Mon May 17 2021 - 19:05:24 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d07f6ca923ea0927a1024dfccafc5b53b61cfecc
commit: e58a41c2226847fb1446f3942dc1b55af8acfe02 csky: uaccess.h: Coding convention with asm generic
date: 3 weeks ago
config: csky-randconfig-s032-20210518 (attached as .config)
compiler: csky-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
# apt-get install sparse
# sparse version: v0.6.3-341-g8af24329-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e58a41c2226847fb1446f3942dc1b55af8acfe02
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e58a41c2226847fb1446f3942dc1b55af8acfe02
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=csky

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/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:32:17: sparse: expected void const volatile [noderef] __user *ptr
arch/csky/abiv2/fpu.c:32:17: sparse: got unsigned short [usertype] *
>> arch/csky/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:32:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:32:17: sparse: got unsigned short [usertype] *
>> arch/csky/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:32:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:32:17: sparse: got unsigned short [usertype] *
>> arch/csky/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:32:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:32:17: sparse: got unsigned short [usertype] *
>> arch/csky/abiv2/fpu.c:32:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:32:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:32:17: sparse: got unsigned short [usertype] *
arch/csky/abiv2/fpu.c:36:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:36:17: sparse: expected void const volatile [noderef] __user *ptr
arch/csky/abiv2/fpu.c:36:17: sparse: got unsigned short [usertype] *
arch/csky/abiv2/fpu.c:36:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:36:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:36:17: sparse: got unsigned short [usertype] *
arch/csky/abiv2/fpu.c:36:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:36:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:36:17: sparse: got unsigned short [usertype] *
arch/csky/abiv2/fpu.c:36:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:36:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:36:17: sparse: got unsigned short [usertype] *
arch/csky/abiv2/fpu.c:36:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *ptr @@ got unsigned short [usertype] * @@
arch/csky/abiv2/fpu.c:36:17: sparse: expected void const [noderef] __user *ptr
arch/csky/abiv2/fpu.c:36:17: sparse: got unsigned short [usertype] *

vim +32 arch/csky/abiv2/fpu.c

e9564df753fd54 Guo Ren 2018-09-05 12
e9564df753fd54 Guo Ren 2018-09-05 13 /*
e9564df753fd54 Guo Ren 2018-09-05 14 * fpu_libc_helper() is to help libc to excute:
e9564df753fd54 Guo Ren 2018-09-05 15 * - mfcr %a, cr<1, 2>
e9564df753fd54 Guo Ren 2018-09-05 16 * - mfcr %a, cr<2, 2>
e9564df753fd54 Guo Ren 2018-09-05 17 * - mtcr %a, cr<1, 2>
e9564df753fd54 Guo Ren 2018-09-05 18 * - mtcr %a, cr<2, 2>
e9564df753fd54 Guo Ren 2018-09-05 19 */
e9564df753fd54 Guo Ren 2018-09-05 20 int fpu_libc_helper(struct pt_regs *regs)
e9564df753fd54 Guo Ren 2018-09-05 21 {
e9564df753fd54 Guo Ren 2018-09-05 22 int fault;
e9564df753fd54 Guo Ren 2018-09-05 23 unsigned long instrptr, regx = 0;
e9564df753fd54 Guo Ren 2018-09-05 24 unsigned long index = 0, tmp = 0;
e9564df753fd54 Guo Ren 2018-09-05 25 unsigned long tinstr = 0;
e9564df753fd54 Guo Ren 2018-09-05 26 u16 instr_hi, instr_low;
e9564df753fd54 Guo Ren 2018-09-05 27
e9564df753fd54 Guo Ren 2018-09-05 28 instrptr = instruction_pointer(regs);
e9564df753fd54 Guo Ren 2018-09-05 29 if (instrptr & 1)
e9564df753fd54 Guo Ren 2018-09-05 30 return 0;
e9564df753fd54 Guo Ren 2018-09-05 31
e9564df753fd54 Guo Ren 2018-09-05 @32 fault = __get_user(instr_low, (u16 *)instrptr);
e9564df753fd54 Guo Ren 2018-09-05 33 if (fault)
e9564df753fd54 Guo Ren 2018-09-05 34 return 0;
e9564df753fd54 Guo Ren 2018-09-05 35
e9564df753fd54 Guo Ren 2018-09-05 36 fault = __get_user(instr_hi, (u16 *)(instrptr + 2));
e9564df753fd54 Guo Ren 2018-09-05 37 if (fault)
e9564df753fd54 Guo Ren 2018-09-05 38 return 0;
e9564df753fd54 Guo Ren 2018-09-05 39
e9564df753fd54 Guo Ren 2018-09-05 40 tinstr = instr_hi | ((unsigned long)instr_low << 16);
e9564df753fd54 Guo Ren 2018-09-05 41
e9564df753fd54 Guo Ren 2018-09-05 42 if (((tinstr >> 21) & 0x1F) != 2)
e9564df753fd54 Guo Ren 2018-09-05 43 return 0;
e9564df753fd54 Guo Ren 2018-09-05 44
e9564df753fd54 Guo Ren 2018-09-05 45 if ((tinstr & MTCR_MASK) == MTCR_DIST) {
e9564df753fd54 Guo Ren 2018-09-05 46 index = (tinstr >> 16) & 0x1F;
e9564df753fd54 Guo Ren 2018-09-05 47 if (index > 13)
e9564df753fd54 Guo Ren 2018-09-05 48 return 0;
e9564df753fd54 Guo Ren 2018-09-05 49
e9564df753fd54 Guo Ren 2018-09-05 50 tmp = tinstr & 0x1F;
e9564df753fd54 Guo Ren 2018-09-05 51 if (tmp > 2)
e9564df753fd54 Guo Ren 2018-09-05 52 return 0;
e9564df753fd54 Guo Ren 2018-09-05 53
e9564df753fd54 Guo Ren 2018-09-05 54 regx = *(&regs->a0 + index);
e9564df753fd54 Guo Ren 2018-09-05 55
e9564df753fd54 Guo Ren 2018-09-05 56 if (tmp == 1)
e9564df753fd54 Guo Ren 2018-09-05 57 mtcr("cr<1, 2>", regx);
e9564df753fd54 Guo Ren 2018-09-05 58 else if (tmp == 2)
e9564df753fd54 Guo Ren 2018-09-05 59 mtcr("cr<2, 2>", regx);
e9564df753fd54 Guo Ren 2018-09-05 60 else
e9564df753fd54 Guo Ren 2018-09-05 61 return 0;
e9564df753fd54 Guo Ren 2018-09-05 62
e9564df753fd54 Guo Ren 2018-09-05 63 regs->pc += 4;
e9564df753fd54 Guo Ren 2018-09-05 64 return 1;
e9564df753fd54 Guo Ren 2018-09-05 65 }
e9564df753fd54 Guo Ren 2018-09-05 66
e9564df753fd54 Guo Ren 2018-09-05 67 if ((tinstr & MFCR_MASK) == MFCR_DIST) {
e9564df753fd54 Guo Ren 2018-09-05 68 index = tinstr & 0x1F;
e9564df753fd54 Guo Ren 2018-09-05 69 if (index > 13)
e9564df753fd54 Guo Ren 2018-09-05 70 return 0;
e9564df753fd54 Guo Ren 2018-09-05 71
e9564df753fd54 Guo Ren 2018-09-05 72 tmp = ((tinstr >> 16) & 0x1F);
e9564df753fd54 Guo Ren 2018-09-05 73 if (tmp > 2)
e9564df753fd54 Guo Ren 2018-09-05 74 return 0;
e9564df753fd54 Guo Ren 2018-09-05 75
e9564df753fd54 Guo Ren 2018-09-05 76 if (tmp == 1)
e9564df753fd54 Guo Ren 2018-09-05 77 regx = mfcr("cr<1, 2>");
e9564df753fd54 Guo Ren 2018-09-05 78 else if (tmp == 2)
e9564df753fd54 Guo Ren 2018-09-05 79 regx = mfcr("cr<2, 2>");
e9564df753fd54 Guo Ren 2018-09-05 80 else
e9564df753fd54 Guo Ren 2018-09-05 81 return 0;
e9564df753fd54 Guo Ren 2018-09-05 82
e9564df753fd54 Guo Ren 2018-09-05 83 *(&regs->a0 + index) = regx;
e9564df753fd54 Guo Ren 2018-09-05 84
e9564df753fd54 Guo Ren 2018-09-05 85 regs->pc += 4;
e9564df753fd54 Guo Ren 2018-09-05 86 return 1;
e9564df753fd54 Guo Ren 2018-09-05 87 }
e9564df753fd54 Guo Ren 2018-09-05 88
e9564df753fd54 Guo Ren 2018-09-05 89 return 0;
e9564df753fd54 Guo Ren 2018-09-05 90 }
e9564df753fd54 Guo Ren 2018-09-05 91

:::::: The code at line 32 was first introduced by commit
:::::: e9564df753fd547fcbcd4fd10015c3b1213ef452 csky: Process management and Signal

:::::: TO: Guo Ren <ren_guo@xxxxxxxxx>
:::::: CC: Guo Ren <ren_guo@xxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
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Previous message: Finn Thain: "Re: [RFC 00/13] [net-next] drivers/net/Space.c cleanup"
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