[arm:ktext-current 1/19] kernel/scs.c:46:47: sparse: sparse: incompatible types in comparison expression (different type sizes):

[arm:ktext-current 1/19] kernel/scs.c:46:47: sparse: sparse: incompatible types in comparison expression (different type sizes):

[kernel test robot]

tree:   git://git.armlinux.org.uk/~rmk/linux-arm.git ktext-current
head:   49e3458967802a6981190b5a1fa9fd66dbf58f8c
commit: 631e7c45f5d4cf043cd236a921c341e3dd9f1909 [1/19] arm64: place kernel in its own L0 page table entry
config: arm64-randconfig-r083-20230717 (https://download.01.org/0day-ci/archive/20230718/202307180826.AwqM3ku6-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230718/202307180826.AwqM3ku6-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/202307180826.AwqM3ku6-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/scs.c:46:47: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> kernel/scs.c:46:47: sparse:    unsigned int *
>> kernel/scs.c:46:47: sparse:    unsigned long *
--
>> lib/test_debug_virtual.c:27:22: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> lib/test_debug_virtual.c:27:22: sparse:    unsigned int *
>> lib/test_debug_virtual.c:27:22: sparse:    unsigned long *
>> lib/test_debug_virtual.c:27:15: sparse: sparse: cast from unknown type
--
>> arch/arm64/kernel/module.c:79:9: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> arch/arm64/kernel/module.c:79:9: sparse:    unsigned int *
>> arch/arm64/kernel/module.c:79:9: sparse:    unsigned long *
>> arch/arm64/kernel/module.c:79:9: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> arch/arm64/kernel/module.c:79:9: sparse:    unsigned int *
>> arch/arm64/kernel/module.c:79:9: sparse:    unsigned long *
--
>> arch/arm64/net/bpf_jit_comp.c:1622:30: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> arch/arm64/net/bpf_jit_comp.c:1622:30: sparse:    unsigned int *
>> arch/arm64/net/bpf_jit_comp.c:1622:30: sparse:    unsigned long *
--
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
   arch/arm64/kernel/probes/kprobes.c:102:21: sparse: sparse: cast to restricted __le32
>> arch/arm64/kernel/probes/kprobes.c:134:51: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> arch/arm64/kernel/probes/kprobes.c:134:51: sparse:    unsigned int *
>> arch/arm64/kernel/probes/kprobes.c:134:51: sparse:    unsigned long *
--
>> kernel/module/main.c:1607:46: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> kernel/module/main.c:1607:46: sparse:    unsigned int *
>> kernel/module/main.c:1607:46: sparse:    unsigned long *
--
   kernel/bpf/core.c:232:49: sparse: sparse: arithmetics on pointers to functions
>> kernel/bpf/core.c:965:16: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> kernel/bpf/core.c:965:16: sparse:    unsigned int *
>> kernel/bpf/core.c:965:16: sparse:    unsigned long *
   kernel/bpf/core.c:965:30: sparse: sparse: incompatible types in comparison expression (different type sizes):
   kernel/bpf/core.c:965:30: sparse:    unsigned int *
   kernel/bpf/core.c:965:30: sparse:    unsigned long *
   kernel/bpf/core.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/xdp.h, ...):
   include/trace/events/xdp.h:320:1: sparse: sparse: Using plain integer as NULL pointer
   include/trace/events/xdp.h:347:1: sparse: sparse: Using plain integer as NULL pointer
   include/trace/events/xdp.h:381:1: sparse: sparse: Using plain integer as NULL pointer
   kernel/bpf/core.c: note: in included file (through include/linux/rbtree_latch.h, include/linux/bpf.h, include/linux/filter.h):
   include/linux/rbtree.h:74:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   include/linux/rbtree.h:74:9: sparse:    struct rb_node [noderef] __rcu *
   include/linux/rbtree.h:74:9: sparse:    struct rb_node *
   include/linux/rbtree.h:74:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   include/linux/rbtree.h:74:9: sparse:    struct rb_node [noderef] __rcu *
   include/linux/rbtree.h:74:9: sparse:    struct rb_node *

vim +46 kernel/scs.c

a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  30  
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  31  static void *__scs_alloc(int node)
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  32  {
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  33  	int i;
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  34  	void *s;
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  35  
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  36  	for (i = 0; i < NR_CACHED_SCS; i++) {
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  37  		s = this_cpu_xchg(scs_cache[i], NULL);
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  38  		if (s) {
f6e39794f4b6da Andrey Konovalov 2022-03-24  39  			s = kasan_unpoison_vmalloc(s, SCS_SIZE,
f6e39794f4b6da Andrey Konovalov 2022-03-24  40  						   KASAN_VMALLOC_PROT_NORMAL);
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  41  			memset(s, 0, SCS_SIZE);
f6e39794f4b6da Andrey Konovalov 2022-03-24  42  			goto out;
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  43  		}
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  44  	}
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  45  
f6e39794f4b6da Andrey Konovalov 2022-03-24 @46  	s = __vmalloc_node_range(SCS_SIZE, 1, VMALLOC_START, VMALLOC_END,
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  47  				    GFP_SCS, PAGE_KERNEL, 0, node,
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  48  				    __builtin_return_address(0));
f6e39794f4b6da Andrey Konovalov 2022-03-24  49  
f6e39794f4b6da Andrey Konovalov 2022-03-24  50  out:
f6e39794f4b6da Andrey Konovalov 2022-03-24  51  	return kasan_reset_tag(s);
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  52  }
a2abe7cbd8fe2d Sami Tolvanen    2020-11-30  53  

:::::: The code at line 46 was first introduced by commit
:::::: f6e39794f4b6da7ca9b77f2f9ad11fd6f0ac83e5 kasan, vmalloc: only tag normal vmalloc allocations

:::::: TO: Andrey Konovalov <andreyknvl@google.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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

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