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charset=us-ascii Content-Disposition: inline X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: E4FD1C0002 X-Stat-Signature: emdr54ephbzngtfqsz1ehe7gpxct9nu1 X-HE-Tag: 1701474501-764796 X-HE-Meta: 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 qIKkDWDX ZD+8iIczvd3MpoVRg8n4UbaCTgMCvlT87ABXNbv6CEQCMRDax37NZKkZF0qxLTQC8S5inIJWKi7al57TyujCV8/VC8/wRJCbs8shv9MTXQhzBDddoZwT0UuoU9H6VMBXtq3L1Utzor+Pnr2L+lNkvgIz4vm6U8zhqi5uXktahkF6V1LywnBnH6AbymjmS1S35tswBpIDJTbUS+wH2TlQnBCsFrfE/GMJ/wu626XZuAw2RnKAh8SDVx2gAAjWVLLprAGQ0Yw3dO5WJjTf23SEoRgUXXUOBcK64KnETORIpWtOjBLTss5DBTjEfYnFCMCmZ7z88gDUYxI3P9bufVhGVtzKBPpdIIYADTjS/4FRO5DWndWyFIYm2w9QHRzSb5j4Rxq8xVYE2OZbr2MRHTNNRFwm/kT6KAobHJPSNKhlmZswCqXPnByqaruGnEpvFzPkgqTcs59ko88WxAWnloueveARSzQ== 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: c9a925b7bcd9552f19ba50519c6a49ed7ca61691 commit: 7581495ac82d6cb073609284c7f7186a48021d1e mm: kfence: fix false positives on big endian date: 7 months ago config: s390-randconfig-r113-20231102 (https://download.01.org/0day-ci/archive/20231202/202312020738.7YABe2N2-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231202/202312020738.7YABe2N2-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/202312020738.7YABe2N2-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