Re: [PATCH v8 03/11] tee: add TEE_IOCTL_PARAM_ATTR_TYPE_UBUF

[kernel test robot <lkp@intel.com>]

Hi Amirreza,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 5303936d609e09665deda94eaedf26a0e5c3a087]

url:    https://github.com/intel-lab-lkp/linux/commits/Amirreza-Zarrabi/tee-allow-a-driver-to-allocate-a-tee_device-without-a-pool/20250821-074358
base:   5303936d609e09665deda94eaedf26a0e5c3a087
patch link:    https://lore.kernel.org/r/20250820-qcom-tee-using-tee-ss-without-mem-obj-v8-3-7066680f138a%40oss.qualcomm.com
patch subject: [PATCH v8 03/11] tee: add TEE_IOCTL_PARAM_ATTR_TYPE_UBUF
config: arm-randconfig-r133-20250821 (https://download.01.org/0day-ci/archive/20250822/202508220436.qjXO4p8r-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 93d24b6b7b148c47a2fa228a4ef31524fa1d9f3f)
reproduce: (https://download.01.org/0day-ci/archive/20250822/202508220436.qjXO4p8r-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508220436.qjXO4p8r-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/tee/tee_core.c:640:33: sparse: sparse: cast removes address space '__user' of expression

vim +/__user +640 drivers/tee/tee_core.c

   618	
   619	static int params_to_supp(struct tee_context *ctx,
   620				  struct tee_ioctl_param __user *uparams,
   621				  size_t num_params, struct tee_param *params)
   622	{
   623		size_t n;
   624	
   625		for (n = 0; n < num_params; n++) {
   626			struct tee_ioctl_param ip;
   627			struct tee_param *p = params + n;
   628	
   629			ip.attr = p->attr;
   630			switch (p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
   631			case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
   632			case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
   633				ip.a = p->u.value.a;
   634				ip.b = p->u.value.b;
   635				ip.c = p->u.value.c;
   636				break;
   637			case TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_INPUT:
   638			case TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_OUTPUT:
   639			case TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_INOUT:
 > 640				ip.a = (u64)p->u.ubuf.uaddr;
   641				ip.b = p->u.ubuf.size;
   642				ip.c = 0;
   643				break;
   644			case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
   645			case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
   646			case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
   647				ip.b = p->u.memref.size;
   648				if (!p->u.memref.shm) {
   649					ip.a = 0;
   650					ip.c = (u64)-1; /* invalid shm id */
   651					break;
   652				}
   653				ip.a = p->u.memref.shm_offs;
   654				ip.c = p->u.memref.shm->id;
   655				break;
   656			default:
   657				ip.a = 0;
   658				ip.b = 0;
   659				ip.c = 0;
   660				break;
   661			}
   662	
   663			if (copy_to_user(uparams + n, &ip, sizeof(ip)))
   664				return -EFAULT;
   665		}
   666	
   667		return 0;
   668	}
   669	

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