[akpm-mm:mm-unstable 14/80] mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64

[akpm-mm:mm-unstable 14/80] mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   988a57a6576e4e7f4ad22aa1486fcd807b83f38b
commit: b58bcd8602ac75d2c1e2757d4027ae039fed6f4c [14/80] mm: kfence: fix false positives on big endian
config: parisc-randconfig-s043-20230507 (https://download.01.org/0day-ci/archive/20230507/202305070938.YhOGAf6p-lkp@intel.com/config)
compiler: hppa-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/akpm/mm.git/commit/?id=b58bcd8602ac75d2c1e2757d4027ae039fed6f4c
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-unstable
        git checkout b58bcd8602ac75d2c1e2757d4027ae039fed6f4c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=parisc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=parisc SHELL=/bin/bash mm/kfence/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305070938.YhOGAf6p-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
>> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64
   mm/kfence/core.c:1181:9: sparse: sparse: context imbalance in 'kfence_handle_page_fault' - different lock contexts for basic block

vim +329 mm/kfence/core.c

0ce20dd840897b Alexander Potapenko 2021-02-25  318  
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  319  static inline void set_canary(const struct kfence_metadata *meta)
0ce20dd840897b Alexander Potapenko 2021-02-25  320  {
0ce20dd840897b Alexander Potapenko 2021-02-25  321  	const unsigned long pageaddr = ALIGN_DOWN(meta->addr, PAGE_SIZE);
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  322  	unsigned long addr = pageaddr;
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  323  
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  324  	/*
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  325  	 * The canary may be written to part of the object memory, but it does
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  326  	 * not affect it. The user should initialize the object before using it.
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  327  	 */
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  328  	for (; addr < meta->addr; addr += sizeof(u64))
1ba3cbf3ec3b21 Peng Zhang          2023-04-03 @329  		*((u64 *)addr) = KFENCE_CANARY_PATTERN_U64;
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  330  
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  331  	addr = ALIGN_DOWN(meta->addr + meta->size, sizeof(u64));
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  332  	for (; addr - pageaddr < PAGE_SIZE; addr += sizeof(u64))
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  333  		*((u64 *)addr) = KFENCE_CANARY_PATTERN_U64;
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  334  }
1ba3cbf3ec3b21 Peng Zhang          2023-04-03  335  

:::::: The code at line 329 was first introduced by commit
:::::: 1ba3cbf3ec3b21d866436fb46b4bb7bdc38608f9 mm: kfence: improve the performance of __kfence_alloc() and __kfence_free()

:::::: TO: Peng Zhang <zhangpeng.00@bytedance.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>

-- 
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https://github.com/intel/lkp-tests