[glemco:staging_rv_bpf_monitors 14/29] kernel/trace/rv/monitors/deadline/deadline.h:111:23: sparse: sparse: incorrect type in assignment (different address spaces)

[glemco:staging_rv_bpf_monitors 14/29] kernel/trace/rv/monitors/deadline/deadline.h:111:23: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gmonaco/linux.git staging_rv_bpf_monitors
head:   11b61a32f588d34caa7cc11204224b8bc95a0f01
commit: d00a7c35d280ccd0e5e0e796a3f5f606543fa992 [14/29] rv: Add deadline monitors
config: i386-randconfig-063-20260307 (https://download.01.org/0day-ci/archive/20260307/202603070541.YX91hd1f-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260307/202603070541.YX91hd1f-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/202603070541.YX91hd1f-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/trace/rv/monitors/nomiss/nomiss.c: note: in included file:
>> kernel/trace/rv/monitors/deadline/deadline.h:111:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_attr [noderef] __user *uattr @@     got void * @@
   kernel/trace/rv/monitors/deadline/deadline.h:111:23: sparse:     expected struct sched_attr [noderef] __user *uattr
   kernel/trace/rv/monitors/deadline/deadline.h:111:23: sparse:     got void *
>> kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *dst @@     got struct sched_attr [noderef] __user * @@
   kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse:     expected void *dst
   kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse:     got struct sched_attr [noderef] __user *
>> kernel/trace/rv/monitors/deadline/deadline.h:118:21: sparse: sparse: dereference of noderef expression
   kernel/trace/rv/monitors/deadline/deadline.h:120:30: sparse: sparse: dereference of noderef expression

vim +111 kernel/trace/rv/monitors/deadline/deadline.h

    93	
    94	static inline int extract_params(struct pt_regs *regs, long id, struct task_struct **p)
    95	{
    96		size_t size = offsetof(struct sched_attr, sched_nice);
    97		struct sched_attr __user *uattr, attr;
    98		int new_policy = -1, ret;
    99		unsigned long args[6];
   100		pid_t pid;
   101	
   102		switch (id) {
   103		case __NR_sched_setscheduler:
   104			syscall_get_arguments(current, regs, args);
   105			pid = args[0];
   106			new_policy = args[1];
   107			break;
   108		case __NR_sched_setattr:
   109			syscall_get_arguments(current, regs, args);
   110			pid = args[0];
 > 111			uattr = (void *)args[1];
   112			/*
   113			 * Just copy up to sched_flags, we are not interested after that
   114			 */
 > 115			ret = copy_struct_from_user(&attr, size, uattr, size);
   116			if (ret)
   117				return ret;
 > 118			if (attr.sched_flags & SCHED_FLAG_KEEP_POLICY)
   119				return -EINVAL;
   120			new_policy = attr.sched_policy;
   121			break;
   122		default:
   123			return -EINVAL;
   124		}
   125		if (!pid)
   126			*p = current;
   127		else {
   128			/*
   129			 * Required for find_task_by_vpid, make sure the caller doesn't
   130			 * need to get_task_struct().
   131			 */
   132			guard(rcu)();
   133			*p = find_task_by_vpid(pid);
   134			if (unlikely(!*p))
   135				return -EINVAL;
   136		}
   137	
   138		return new_policy & ~SCHED_RESET_ON_FORK;
   139	}
   140	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki