[linux-next:master 5995/6188] mm/kasan/kasan_test_module.c:90:26: sparse: sparse: incompatible types in comparison expression (different address spaces):

[kernel test robot <lkp@xxxxxxxxx>]

Hi Andrey,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   47c191411b68a771261be3dc0bd6f68394cef358
commit: 5de20e0f195f50622c10ea2fd0fc6c43b49988cc [5995/6188] kasan: move tests to mm/kasan/
config: s390-randconfig-s041-20220907 (https://download.01.org/0day-ci/archive/20220908/202209082120.MTrpG6Be-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5de20e0f195f50622c10ea2fd0fc6c43b49988cc
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 5de20e0f195f50622c10ea2fd0fc6c43b49988cc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)
>> mm/kasan/kasan_test_module.c:90:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
>> mm/kasan/kasan_test_module.c:90:26: sparse:    struct kasan_rcu_info [noderef] __rcu *
>> mm/kasan/kasan_test_module.c:90:26: sparse:    struct kasan_rcu_info *

vim +90 mm/kasan/kasan_test_module.c

73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  78  
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  79  static noinline void __init kasan_rcu_uaf(void)
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  80  {
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  81  	struct kasan_rcu_info *ptr;
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  82  
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  83  	pr_info("use-after-free in kasan_rcu_reclaim\n");
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  84  	ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL);
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  85  	if (!ptr) {
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  86  		pr_err("Allocation failed\n");
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  87  		return;
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  88  	}
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  89  
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13 @90  	global_rcu_ptr = rcu_dereference_protected(ptr, NULL);
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  91  	call_rcu(&global_rcu_ptr->rcu, kasan_rcu_reclaim);
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  92  }
73228c7ecc5e40 lib/test_kasan_module.c Patricia Alfonso 2020-10-13  93  

:::::: The code at line 90 was first introduced by commit
:::::: 73228c7ecc5e40c0851c4703c5ec6ed38123e989 KASAN: port KASAN Tests to KUnit

:::::: TO: Patricia Alfonso <trishalfonso@xxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

-- 
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https://01.org/lkp