kernel/fork.c:1647:36: sparse: sparse: incorrect type in argument 2 (different address spaces)

From: kernel test robot
Date: Wed Nov 29 2023 - 10:42:38 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 18d46e76d7c2eedd8577fae67e3f1d4db25018b0
commit: a275a82dcd4024c75337db15d59ed039c31e21da LoongArch: Use alternative to optimize libraries
date: 12 months ago
config: loongarch-randconfig-r034-20230511 (https://download.01.org/0day-ci/archive/20231129/202311292218.LfF2vCN0-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20231129/202311292218.LfF2vCN0-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311292218.LfF2vCN0-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
kernel/fork.c:1310:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct file *[assigned] old_exe_file @@ got struct file [noderef] __rcu *[assigned] __res @@
kernel/fork.c:1310:22: sparse: expected struct file *[assigned] old_exe_file
kernel/fork.c:1310:22: sparse: got struct file [noderef] __rcu *[assigned] __res
kernel/fork.c:1637:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct refcount_struct [usertype] *r @@ got struct refcount_struct [noderef] __rcu * @@
kernel/fork.c:1637:38: sparse: expected struct refcount_struct [usertype] *r
kernel/fork.c:1637:38: sparse: got struct refcount_struct [noderef] __rcu *
kernel/fork.c:1646:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:1646:31: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:1646:31: sparse: got struct spinlock [noderef] __rcu *
>> kernel/fork.c:1647:36: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *__from @@ got struct k_sigaction [noderef] __rcu * @@
kernel/fork.c:1647:36: sparse: expected void const *__from
kernel/fork.c:1647:36: sparse: got struct k_sigaction [noderef] __rcu *
kernel/fork.c:1648:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:1648:33: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:1648:33: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2074:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2074:31: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2074:31: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2078:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2078:33: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2078:33: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got unsigned int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got unsigned int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got unsigned int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got unsigned int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got int [noderef] __percpu *
kernel/fork.c:2109:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@
kernel/fork.c:2109:9: sparse: expected void *ptr
kernel/fork.c:2109:9: sparse: got int [noderef] __percpu *
kernel/fork.c:2398:32: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct [noderef] __rcu *real_parent @@ got struct task_struct *task @@
kernel/fork.c:2398:32: sparse: expected struct task_struct [noderef] __rcu *real_parent
kernel/fork.c:2398:32: sparse: got struct task_struct *task
kernel/fork.c:2407:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2407:27: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2407:27: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2454:54: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct list_head *head @@ got struct list_head [noderef] __rcu * @@
kernel/fork.c:2454:54: sparse: expected struct list_head *head
kernel/fork.c:2454:54: sparse: got struct list_head [noderef] __rcu *
kernel/fork.c:2476:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2476:29: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2476:29: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2497:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2497:29: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2497:29: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2524:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sighand_struct *sighand @@ got struct sighand_struct [noderef] __rcu *sighand @@
kernel/fork.c:2524:28: sparse: expected struct sighand_struct *sighand
kernel/fork.c:2524:28: sparse: got struct sighand_struct [noderef] __rcu *sighand
kernel/fork.c:2553:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2553:31: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2553:31: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2555:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/fork.c:2555:33: sparse: expected struct spinlock [usertype] *lock
kernel/fork.c:2555:33: sparse: got struct spinlock [noderef] __rcu *
kernel/fork.c:2998:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *[assigned] parent @@ got struct task_struct [noderef] __rcu *real_parent @@
kernel/fork.c:2998:24: sparse: expected struct task_struct *[assigned] parent
kernel/fork.c:2998:24: sparse: got struct task_struct [noderef] __rcu *real_parent
kernel/fork.c:3079:43: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct refcount_struct const [usertype] *r @@ got struct refcount_struct [noderef] __rcu * @@
kernel/fork.c:3079:43: sparse: expected struct refcount_struct const [usertype] *r
kernel/fork.c:3079:43: sparse: got struct refcount_struct [noderef] __rcu *
kernel/fork.c:2119:22: sparse: sparse: dereference of noderef expression
kernel/fork.c: note: in included file (through arch/loongarch/include/uapi/asm/bpf_perf_event.h, include/uapi/linux/bpf_perf_event.h, ...):
include/linux/ptrace.h:210:45: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *new_parent @@ got struct task_struct [noderef] __rcu *parent @@
include/linux/ptrace.h:210:45: sparse: expected struct task_struct *new_parent
include/linux/ptrace.h:210:45: sparse: got struct task_struct [noderef] __rcu *parent
include/linux/ptrace.h:210:62: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected struct cred const *ptracer_cred @@ got struct cred const [noderef] __rcu *ptracer_cred @@
include/linux/ptrace.h:210:62: sparse: expected struct cred const *ptracer_cred
include/linux/ptrace.h:210:62: sparse: got struct cred const [noderef] __rcu *ptracer_cred
kernel/fork.c:2452:59: sparse: sparse: dereference of noderef expression
kernel/fork.c:2453:59: sparse: sparse: dereference of noderef expression

vim +1647 kernel/fork.c

a016f3389c0660 JANAK DESAI 2006-02-07 1631
a39bc51691a0c8 Alexey Dobriyan 2007-10-18 1632 static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1633 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 1634 struct sighand_struct *sig;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1635
60348802e9cb13 Zhaolei 2009-01-06 1636 if (clone_flags & CLONE_SIGHAND) {
d036bda7d0e726 Elena Reshetova 2019-01-18 1637 refcount_inc(&current->sighand->count);
^1da177e4c3f41 Linus Torvalds 2005-04-16 1638 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1639 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 1640 sig = kmem_cache_alloc(sighand_cachep, GFP_KERNEL);
0c282b068eb26d Madhuparna Bhowmik 2020-01-27 1641 RCU_INIT_POINTER(tsk->sighand, sig);
^1da177e4c3f41 Linus Torvalds 2005-04-16 1642 if (!sig)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1643 return -ENOMEM;
9d7fb04276481c Peter Zijlstra 2015-06-30 1644
d036bda7d0e726 Elena Reshetova 2019-01-18 1645 refcount_set(&sig->count, 1);
06e62a46bbba20 Jann Horn 2018-08-21 1646 spin_lock_irq(&current->sighand->siglock);
^1da177e4c3f41 Linus Torvalds 2005-04-16 @1647 memcpy(sig->action, current->sighand->action, sizeof(sig->action));
06e62a46bbba20 Jann Horn 2018-08-21 1648 spin_unlock_irq(&current->sighand->siglock);
b612e5df4587c9 Christian Brauner 2019-10-14 1649
b612e5df4587c9 Christian Brauner 2019-10-14 1650 /* Reset all signal handler not set to SIG_IGN to SIG_DFL. */
b612e5df4587c9 Christian Brauner 2019-10-14 1651 if (clone_flags & CLONE_CLEAR_SIGHAND)
b612e5df4587c9 Christian Brauner 2019-10-14 1652 flush_signal_handlers(tsk, 0);
b612e5df4587c9 Christian Brauner 2019-10-14 1653
^1da177e4c3f41 Linus Torvalds 2005-04-16 1654 return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1655 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 1656

:::::: The code at line 1647 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

--
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