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charset=us-ascii Content-Disposition: inline X-Stat-Signature: s4j1zkrxck11657idz615bca3bad8g1s X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 15980C0017 X-Rspam-User: X-HE-Tag: 1698933479-159062 X-HE-Meta: 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 XPuW6NRW 9EtNiO//xjcrt2UnSBpIMCgPy3Qs/RoRwtjkk2r6s1oKxHeMUUuRl/vNciDo8be4AtJovMX9W6KZ6stpUwGUR2cJgkLBwo9+jz25ke+FVVuJ1RdGMjBMJYZ2AvX0niLuVSbHbD3+mDqCmCLIn7qFW8kmdkM/26UpOMkwVlUl/lZ/0DBUH0J6xDQG0CwrrSrT6PLdy6MZSlE5YqtspncgXtnaaU7yLQ3ASTuQfDXRr6TcxYITfPR+8ikBh9q8T399+RhUDGnMosBkhHTPv2j+xWfSGurrM5CUx1uBuIK0CfIr9lAl++HHkYmo48xQG7bV8F+cy9boazVcly2BOMxH9cQzzXOz7+xSxsF0FGJLywtuvuFk/19ju9d2CWbQkmTi6agP18NcZ5EJVSr2obXcmJOhHs8dYn/LLC4hLBx8IsI3UTbGApjhAvni6yJIJ9o4f+I1NuOqP72zapPpzm3EUnVoOUEoqZZ334BZS X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 21e80f3841c01aeaf32d7aee7bbc87b3db1aa0c6 commit: 7581495ac82d6cb073609284c7f7186a48021d1e mm: kfence: fix false positives on big endian date: 6 months ago config: s390-randconfig-r113-20231102 (https://download.01.org/0day-ci/archive/20231102/202311022155.9hNK2VJO-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231102/202311022155.9hNK2VJO-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202311022155.9hNK2VJO-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:333:34: 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: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 :::::: CC: Andrew Morton -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki