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Message-ID: <202409272225.szemlZKv-lkp@intel.com>
Date: Fri, 27 Sep 2024 22:23:29 +0800
From: kernel test robot <lkp@...el.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: kernel/sched/syscalls.c:1196:1: sparse: sparse: Using plain integer
 as NULL pointer

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   075dbe9f6e3c21596c5245826a4ee1f1c1676eb8
commit: 04746ed80bcf3130951ed4d5c1bc5b0bcabdde22 sched/syscalls: Split out kernel/sched/syscalls.c from kernel/sched/core.c
date:   4 months ago
config: s390-randconfig-r132-20240927 (https://download.01.org/0day-ci/archive/20240927/202409272225.szemlZKv-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20240927/202409272225.szemlZKv-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409272225.szemlZKv-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/rt.c:2044:40: sparse:     expected struct task_struct *task
   kernel/sched/rt.c:2044:40: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/rt.c:2067:13: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/rt.c:2067:13: sparse:    struct task_struct *
   kernel/sched/rt.c:2067:13: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/rt.c:2417:54: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *tsk @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/rt.c:2417:54: sparse:     expected struct task_struct *tsk
   kernel/sched/rt.c:2417:54: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/rt.c:2419:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/rt.c:2419:40: sparse:     expected struct task_struct *p
   kernel/sched/rt.c:2419:40: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/rt.c:2419:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/rt.c:2419:61: sparse:     expected struct task_struct *p
   kernel/sched/rt.c:2419:61: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/deadline.c:2401:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:2401:23: sparse:     expected struct task_struct *p
   kernel/sched/deadline.c:2401:23: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:2411:13: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/deadline.c:2411:13: sparse:    struct task_struct *
   kernel/sched/deadline.c:2411:13: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/deadline.c:2519:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/deadline.c:2519:25: sparse:    struct task_struct *
   kernel/sched/deadline.c:2519:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/deadline.c:2026:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct sched_dl_entity const *b @@     got struct sched_dl_entity [noderef] __rcu * @@
   kernel/sched/deadline.c:2026:42: sparse:     expected struct sched_dl_entity const *b
   kernel/sched/deadline.c:2026:42: sparse:     got struct sched_dl_entity [noderef] __rcu *
   kernel/sched/deadline.c:2037:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *tsk @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:2037:38: sparse:     expected struct task_struct *tsk
   kernel/sched/deadline.c:2037:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:1220:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:1220:23: sparse:     expected struct task_struct *p
   kernel/sched/deadline.c:1220:23: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:1444:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:1444:38: sparse:     expected struct task_struct *curr
   kernel/sched/deadline.c:1444:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:2262:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/deadline.c:2262:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/deadline.c:2262:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/deadline.c:1911:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu * @@
   kernel/sched/deadline.c:1911:14: sparse:     expected struct task_struct *curr
   kernel/sched/deadline.c:1911:14: sparse:     got struct task_struct [noderef] __rcu *
   kernel/sched/deadline.c:1987:43: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:1987:43: sparse:     expected struct task_struct *p
   kernel/sched/deadline.c:1987:43: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:2566:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *tsk @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:2566:38: sparse:     expected struct task_struct *tsk
   kernel/sched/deadline.c:2566:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:2568:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/deadline.c:2568:23: sparse:     expected struct task_struct *p
   kernel/sched/deadline.c:2568:23: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/deadline.c:2570:44: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct sched_dl_entity const *b @@     got struct sched_dl_entity [noderef] __rcu * @@
   kernel/sched/deadline.c:2570:44: sparse:     expected struct sched_dl_entity const *b
   kernel/sched/deadline.c:2570:44: sparse:     got struct sched_dl_entity [noderef] __rcu *
   kernel/sched/deadline.c:2745:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/deadline.c:2745:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/deadline.c:2745:22: sparse:    struct task_struct *
   kernel/sched/deadline.c:2794:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/syscalls.c:206:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/syscalls.c:206:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/syscalls.c:206:22: sparse:    struct task_struct *
   kernel/sched/build_policy.c: note: in included file (through include/linux/smp.h, include/linux/sched/clock.h):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2328:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2328:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2328:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2156:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2156:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2328:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2328:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2328:9: sparse:    struct task_struct *
   kernel/sched/build_policy.c: note: in included file:
>> kernel/sched/syscalls.c:1196:1: sparse: sparse: Using plain integer as NULL pointer
>> kernel/sched/syscalls.c:1196:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1386:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1386:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1402:6: sparse: sparse: context imbalance in 'sched_getaffinity' - different lock contexts for basic block
   kernel/sched/syscalls.c:1431:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1431:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1676:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/syscalls.c:1676:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/rt.c:1707:15: sparse: sparse: dereference of noderef expression

vim +1196 kernel/sched/syscalls.c

  1188	
  1189	/**
  1190	 * sys_sched_getattr - similar to sched_getparam, but with sched_attr
  1191	 * @pid: the pid in question.
  1192	 * @uattr: structure containing the extended parameters.
  1193	 * @usize: sizeof(attr) for fwd/bwd comp.
  1194	 * @flags: for future extension.
  1195	 */
> 1196	SYSCALL_DEFINE4(sched_getattr, pid_t, pid, struct sched_attr __user *, uattr,
  1197			unsigned int, usize, unsigned int, flags)
  1198	{
  1199		struct sched_attr kattr = { };
  1200		struct task_struct *p;
  1201		int retval;
  1202	
  1203		if (!uattr || pid < 0 || usize > PAGE_SIZE ||
  1204		    usize < SCHED_ATTR_SIZE_VER0 || flags)
  1205			return -EINVAL;
  1206	
  1207		scoped_guard (rcu) {
  1208			p = find_process_by_pid(pid);
  1209			if (!p)
  1210				return -ESRCH;
  1211	
  1212			retval = security_task_getscheduler(p);
  1213			if (retval)
  1214				return retval;
  1215	
  1216			kattr.sched_policy = p->policy;
  1217			if (p->sched_reset_on_fork)
  1218				kattr.sched_flags |= SCHED_FLAG_RESET_ON_FORK;
  1219			get_params(p, &kattr);
  1220			kattr.sched_flags &= SCHED_FLAG_ALL;
  1221	

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

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