tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   663397d1b469ff57f216d499b74a0b0183a508b8
commit: 4fc50feaeafc0f92cc72c1e88aa7677f568df723 [14034/14039] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git
config: x86_64-randconfig-s023
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=4fc50feaeafc0f92cc72c1e88aa7677f568df723
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 4fc50feaeafc0f92cc72c1e88aa7677f568df723
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/vfio/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> drivers/vfio/group.c:111:13: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected int [noderef] __user *__ptr_clean @@     got int * @@
   drivers/vfio/group.c:111:13: sparse:     expected int [noderef] __user *__ptr_clean
   drivers/vfio/group.c:111:13: sparse:     got int *

vim +111 drivers/vfio/group.c

9eefba8002c27d6 Yi Liu 2022-11-25  101  
9eefba8002c27d6 Yi Liu 2022-11-25  102  static int vfio_group_ioctl_set_container(struct vfio_group *group,
9eefba8002c27d6 Yi Liu 2022-11-25  103  					  int __user *arg)
9eefba8002c27d6 Yi Liu 2022-11-25  104  {
9eefba8002c27d6 Yi Liu 2022-11-25  105  	struct vfio_container *container;
9eefba8002c27d6 Yi Liu 2022-11-25  106  	struct iommufd_ctx *iommufd;
9eefba8002c27d6 Yi Liu 2022-11-25  107  	struct fd f;
9eefba8002c27d6 Yi Liu 2022-11-25  108  	int ret;
9eefba8002c27d6 Yi Liu 2022-11-25  109  	int fd;
9eefba8002c27d6 Yi Liu 2022-11-25  110  
9eefba8002c27d6 Yi Liu 2022-11-25 @111  	if (get_user(fd, arg))
9eefba8002c27d6 Yi Liu 2022-11-25  112  		return -EFAULT;
9eefba8002c27d6 Yi Liu 2022-11-25  113  
9eefba8002c27d6 Yi Liu 2022-11-25  114  	f = fdget(fd);
9eefba8002c27d6 Yi Liu 2022-11-25  115  	if (!f.file)
9eefba8002c27d6 Yi Liu 2022-11-25  116  		return -EBADF;
9eefba8002c27d6 Yi Liu 2022-11-25  117  
9eefba8002c27d6 Yi Liu 2022-11-25  118  	mutex_lock(&group->group_lock);
9eefba8002c27d6 Yi Liu 2022-11-25  119  	if (vfio_group_has_iommu(group)) {
9eefba8002c27d6 Yi Liu 2022-11-25  120  		ret = -EINVAL;
9eefba8002c27d6 Yi Liu 2022-11-25  121  		goto out_unlock;
9eefba8002c27d6 Yi Liu 2022-11-25  122  	}
9eefba8002c27d6 Yi Liu 2022-11-25  123  	if (!group->iommu_group) {
9eefba8002c27d6 Yi Liu 2022-11-25  124  		ret = -ENODEV;
9eefba8002c27d6 Yi Liu 2022-11-25  125  		goto out_unlock;
9eefba8002c27d6 Yi Liu 2022-11-25  126  	}
9eefba8002c27d6 Yi Liu 2022-11-25  127  
9eefba8002c27d6 Yi Liu 2022-11-25  128  	container = vfio_container_from_file(f.file);
9eefba8002c27d6 Yi Liu 2022-11-25  129  	if (container) {
9eefba8002c27d6 Yi Liu 2022-11-25  130  		ret = vfio_container_attach_group(container, group);
9eefba8002c27d6 Yi Liu 2022-11-25  131  		goto out_unlock;
9eefba8002c27d6 Yi Liu 2022-11-25  132  	}
9eefba8002c27d6 Yi Liu 2022-11-25  133  
9eefba8002c27d6 Yi Liu 2022-11-25  134  	iommufd = iommufd_ctx_from_file(f.file);
9eefba8002c27d6 Yi Liu 2022-11-25  135  	if (!IS_ERR(iommufd)) {
9eefba8002c27d6 Yi Liu 2022-11-25  136  		u32 ioas_id;
9eefba8002c27d6 Yi Liu 2022-11-25  137  
9eefba8002c27d6 Yi Liu 2022-11-25  138  		ret = iommufd_vfio_compat_ioas_id(iommufd, &ioas_id);
9eefba8002c27d6 Yi Liu 2022-11-25  139  		if (ret) {
9eefba8002c27d6 Yi Liu 2022-11-25  140  			iommufd_ctx_put(group->iommufd);
9eefba8002c27d6 Yi Liu 2022-11-25  141  			goto out_unlock;
9eefba8002c27d6 Yi Liu 2022-11-25  142  		}
9eefba8002c27d6 Yi Liu 2022-11-25  143  
9eefba8002c27d6 Yi Liu 2022-11-25  144  		group->iommufd = iommufd;
9eefba8002c27d6 Yi Liu 2022-11-25  145  		goto out_unlock;
9eefba8002c27d6 Yi Liu 2022-11-25  146  	}
9eefba8002c27d6 Yi Liu 2022-11-25  147  
9eefba8002c27d6 Yi Liu 2022-11-25  148  	/* The FD passed is not recognized. */
9eefba8002c27d6 Yi Liu 2022-11-25  149  	ret = -EBADFD;
9eefba8002c27d6 Yi Liu 2022-11-25  150  
9eefba8002c27d6 Yi Liu 2022-11-25  151  out_unlock:
9eefba8002c27d6 Yi Liu 2022-11-25  152  	mutex_unlock(&group->group_lock);
9eefba8002c27d6 Yi Liu 2022-11-25  153  	fdput(f);
9eefba8002c27d6 Yi Liu 2022-11-25  154  	return ret;
9eefba8002c27d6 Yi Liu 2022-11-25  155  }
9eefba8002c27d6 Yi Liu 2022-11-25  156  

:::::: The code at line 111 was first introduced by commit
:::::: 9eefba8002c27d65ab52a533fd0611b099b73591 vfio: Move vfio group specific code into group.c

:::::: TO: Yi Liu <yi.l.liu@intel.com>
:::::: CC: Jason Gunthorpe <jgg@nvidia.com>

-- 
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