tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1048ba83fb1c00cd24172e23e8263972f6b5d9ac
commit: 9f85cbe50aa044a46f0a22fda323fa27b80c82da RDMA/uverbs: Expose the new GID query API to user space
date:   4 months ago
config: sh-randconfig-s031-20210201 (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=9f85cbe50aa044a46f0a22fda323fa27b80c82da
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9f85cbe50aa044a46f0a22fda323fa27b80c82da
        # 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@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/infiniband/core/uverbs_std_types_device.c:299:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *addr @@     got void [noderef] __user *__cl_addr @@
   drivers/infiniband/core/uverbs_std_types_device.c:299:29: sparse:     expected void *addr
   drivers/infiniband/core/uverbs_std_types_device.c:299:29: sparse:     got void [noderef] __user *__cl_addr
   drivers/infiniband/core/uverbs_std_types_device.c:115:15: sparse: sparse: cast truncates bits from constant value (ffff0001 becomes 1)
   drivers/infiniband/core/uverbs_std_types_device.c:195:15: sparse: sparse: cast truncates bits from constant value (ffffff01 becomes 1)

vim +299 drivers/infiniband/core/uverbs_std_types_device.c

   270	
   271	static int copy_gid_entries_to_user(struct uverbs_attr_bundle *attrs,
   272					    struct ib_uverbs_gid_entry *entries,
   273					    size_t num_entries, size_t user_entry_size)
   274	{
   275		const struct uverbs_attr *attr;
   276		void __user *user_entries;
   277		size_t copy_len;
   278		int ret;
   279		int i;
   280	
   281		if (user_entry_size == sizeof(*entries)) {
   282			ret = uverbs_copy_to(attrs,
   283					     UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES,
   284					     entries, sizeof(*entries) * num_entries);
   285			return ret;
   286		}
   287	
   288		copy_len = min_t(size_t, user_entry_size, sizeof(*entries));
   289		attr = uverbs_attr_get(attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES);
   290		if (IS_ERR(attr))
   291			return PTR_ERR(attr);
   292	
   293		user_entries = u64_to_user_ptr(attr->ptr_attr.data);
   294		for (i = 0; i < num_entries; i++) {
   295			if (copy_to_user(user_entries, entries, copy_len))
   296				return -EFAULT;
   297	
   298			if (user_entry_size > sizeof(*entries)) {
 > 299				if (clear_user(user_entries + sizeof(*entries),
   300					       user_entry_size - sizeof(*entries)))
   301					return -EFAULT;
   302			}
   303	
   304			entries++;
   305			user_entries += user_entry_size;
   306		}
   307	
   308		return uverbs_output_written(attrs,
   309					     UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES);
   310	}
   311	

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