linux-kernel - drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse: sparse: incorrect type in initializer (different address spaces)

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Date:   Fri, 12 Feb 2021 19:48:41 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23:
 sparse: sparse: incorrect type in initializer (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dcc0b49040c70ad827a7f3d58a21b01fdb14e749
commit: 4184da4f316a549ae732d91088571fef46a2f58d staging: vchiq: fix __user annotations
date:   5 months ago
config: sh-randconfig-s032-20210212 (attached as .config)
compiler: sh4-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: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4184da4f316a549ae732d91088571fef46a2f58d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 4184da4f316a549ae732d91088571fef46a2f58d
        # 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=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


"sparse warnings: (new ones prefixed by >>)"
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1000:56: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void *offset @@     got void [noderef] __user *data @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1000:56: sparse:     expected void *offset
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1000:56: sparse:     got void [noderef] __user *data
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1214:47: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __user *[addressable] [assigned] bulk_userdata @@     got void *bulk_userdata @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1214:47: sparse:     expected void [noderef] __user *[addressable] [assigned] bulk_userdata
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1214:47: sparse:     got void *bulk_userdata
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected unsigned int const *__gu_addr @@     got unsigned int [noderef] [usertype] __user * @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse:     expected unsigned int const *__gu_addr
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse:     got unsigned int [noderef] [usertype] __user *
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned int const *__gu_addr @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse:     expected void const volatile [noderef] __user *ptr
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1051:23: sparse:     got unsigned int const *__gu_addr
>> drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected unsigned long const *__gu_addr @@     got unsigned long [noderef] [usertype] __user * @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse:     expected unsigned long const *__gu_addr
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse:     got unsigned long [noderef] [usertype] __user *
>> drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned long const *__gu_addr @@
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse:     expected void const volatile [noderef] __user *ptr
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1055:23: sparse:     got unsigned long const *__gu_addr

vim +1055 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c

  1042	
  1043	/* read a user pointer value from an array pointers in user space */
  1044	static inline int vchiq_get_user_ptr(void __user **buf, void __user *ubuf, int index)
  1045	{
  1046		int ret;
  1047	
  1048		if (in_compat_syscall()) {
  1049			compat_uptr_t ptr32;
  1050			compat_uptr_t __user *uptr = ubuf;
  1051			ret = get_user(ptr32, uptr + index);
  1052			*buf = compat_ptr(ptr32);
  1053		} else {
  1054			uintptr_t ptr, __user *uptr = ubuf;
> 1055			ret = get_user(ptr, uptr + index);
  1056			*buf = (void __user *)ptr;
  1057		}
  1058	
  1059		return ret;
  1060	}
  1061	

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

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