arch/arm/mm/alignment.c:775:25: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3aaf0a27ffc29b19a62314edd684b9bc6346f9a8
commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for __chk_{user,io}_ptr()
date:   5 months ago
config: arm-randconfig-s032-20210203 (attached as .config)
compiler: arm-linux-gnueabi-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: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e5fc436f06eef54ef512ea55a9db8eb9f2e76959
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e5fc436f06eef54ef512ea55a9db8eb9f2e76959
        # 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__' ARCH=arm 

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/arm/mm/alignment.c:775:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned int [usertype] *ip @@
   arch/arm/mm/alignment.c:775:25: sparse:     expected void const volatile [noderef] __user *ptr
   arch/arm/mm/alignment.c:775:25: sparse:     got unsigned int [usertype] *ip
>> arch/arm/mm/alignment.c:790:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned short [usertype] *ip @@
   arch/arm/mm/alignment.c:790:25: sparse:     expected void const volatile [noderef] __user *ptr
   arch/arm/mm/alignment.c:790:25: sparse:     got unsigned short [usertype] *ip

vim +775 arch/arm/mm/alignment.c

c2860d43f5dfab George G. Davis   2009-06-04  768  
1bb9fb0a147f9d Russell King      2019-09-06  769  static int alignment_get_arm(struct pt_regs *regs, u32 *ip, u32 *inst)
67e15fa5b487ad Russell King      2019-08-31  770  {
67e15fa5b487ad Russell King      2019-08-31  771  	u32 instr = 0;
67e15fa5b487ad Russell King      2019-08-31  772  	int fault;
67e15fa5b487ad Russell King      2019-08-31  773  
67e15fa5b487ad Russell King      2019-08-31  774  	if (user_mode(regs))
67e15fa5b487ad Russell King      2019-08-31 @775  		fault = get_user(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  776  	else
25f12ae45fc193 Christoph Hellwig 2020-06-17  777  		fault = get_kernel_nofault(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  778  
67e15fa5b487ad Russell King      2019-08-31  779  	*inst = __mem_to_opcode_arm(instr);
67e15fa5b487ad Russell King      2019-08-31  780  
67e15fa5b487ad Russell King      2019-08-31  781  	return fault;
67e15fa5b487ad Russell King      2019-08-31  782  }
67e15fa5b487ad Russell King      2019-08-31  783  
67e15fa5b487ad Russell King      2019-08-31  784  static int alignment_get_thumb(struct pt_regs *regs, u16 *ip, u16 *inst)
67e15fa5b487ad Russell King      2019-08-31  785  {
67e15fa5b487ad Russell King      2019-08-31  786  	u16 instr = 0;
67e15fa5b487ad Russell King      2019-08-31  787  	int fault;
67e15fa5b487ad Russell King      2019-08-31  788  
67e15fa5b487ad Russell King      2019-08-31  789  	if (user_mode(regs))
67e15fa5b487ad Russell King      2019-08-31 @790  		fault = get_user(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  791  	else
25f12ae45fc193 Christoph Hellwig 2020-06-17  792  		fault = get_kernel_nofault(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  793  
67e15fa5b487ad Russell King      2019-08-31  794  	*inst = __mem_to_opcode_thumb16(instr);
67e15fa5b487ad Russell King      2019-08-31  795  
67e15fa5b487ad Russell King      2019-08-31  796  	return fault;
67e15fa5b487ad Russell King      2019-08-31  797  }
67e15fa5b487ad Russell King      2019-08-31  798  

:::::: The code at line 775 was first introduced by commit
:::::: 67e15fa5b487adb9b78a92789eeff2d6ec8f5cee ARM: mm: fix alignment handler faults under memory pressure

:::::: TO: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
:::::: CC: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>

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

Attachment: .config.gz
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