kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse: sparse: incorrect type in argument 1 (different address spaces)

kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4d3a2a466b8d68d852a1f3bbf11204b718428dc4
commit: b133207deb72609ad4da40c4d50128a5e150677b rv: Add nomiss deadline monitor
date:   7 weeks ago
config: loongarch-randconfig-r111-20260519 (https://download.01.org/0day-ci/archive/20260519/202605191116.acPXYOW4-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260519/202605191116.acPXYOW4-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
| Fixes: b133207deb72 ("rv: Add nomiss deadline monitor")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605191116.acPXYOW4-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: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 +115 kernel/trace/rv/monitors/deadline/deadline.h

    94	
    95	static inline int extract_params(struct pt_regs *regs, long id, pid_t *pid_out)
    96	{
    97		size_t size = offsetofend(struct sched_attr, sched_flags);
    98		struct sched_attr __user *uattr, attr;
    99		int new_policy = -1, ret;
   100		unsigned long args[6];
   101	
   102		switch (id) {
   103		case __NR_sched_setscheduler:
   104			syscall_get_arguments(current, regs, args);
   105			*pid_out = args[0];
   106			new_policy = args[1];
   107			break;
   108		case __NR_sched_setattr:
   109			syscall_get_arguments(current, regs, args);
   110			*pid_out = args[0];
   111			uattr = (struct sched_attr __user *)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	
   126		return new_policy & ~SCHED_RESET_ON_FORK;
   127	}
   128	

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

Re: kernel/trace/rv/monitors/deadline/deadline.h:115:46: sparse: sparse: incorrect type in argument 1 (different address spaces)

[Nam Cao]

kernel test robot <lkp@intel.com> writes:
> sparse warnings: (new ones prefixed by >>)
>    kernel/trace/rv/monitors/nomiss/nomiss.c: note: in included file:
>>> 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

Already fixed by:
https://lore.kernel.org/lkml/20260512140250.262190-2-gmonaco@redhat.com/

Nam