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FYI. f1b4cb650b9a0eeb f1982740f5e77090bde41a9b84e ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :18 17% 3:18 dmesg.BUG:KCSAN:data-race_in_copy_from_iter/print_report :18 44% 8:18 dmesg.BUG:KCSAN:data-race_in_copy_to_iter/print_report <----(1) 5:18 -28% :18 dmesg.BUG:KCSAN:data-race_in_copyin/print_report 1:18 -6% :18 dmesg.BUG:KCSAN:data-race_in_copyout/print_report 1:18 -6% :18 dmesg.BUG:KCSAN:data-race_in_do_raw_write_unlock/print_report 1:18 0% 1:18 dmesg.BUG:KCSAN:data-race_in_end_dir_add/print_report 4:18 11% 6:18 dmesg.BUG:KCSAN:data-race_in_inode_update_timestamps/print_report 4:18 -17% 1:18 dmesg.BUG:KCSAN:data-race_in_print_report/start_dir_add 15:18 0% 15:18 dmesg.BUG:KCSAN:data-race_in_print_report/timekeeping_advance 1:18 6% 2:18 dmesg.BUG:KCSAN:data-race_in_print_report/timespec64_equal 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-lkp/202410251443.19c83c0a-oliver.sang@intel.com [ 130.227943][ T404] BUG: KCSAN: data-race in _copy_to_iter / print_report [ 130.229246][ T404] [ 130.229742][ T404] read to 0xffff88817ef9b000 of 4096 bytes by task 373 on cpu 1: [ 130.231136][ T404] _copy_to_iter (arch/x86/include/asm/uaccess_64.h:107 arch/x86/include/asm/uaccess_64.h:107 arch/x86/include/asm/uaccess_64.h:133 lib/iov_iter.c:27 include/linux/iov_iter.h:51 include/linux/iov_iter.h:247 include/linux/iov_iter.h:271 lib/iov_iter.c:195) [ 130.231994][ T404] copy_page_to_iter (lib/iov_iter.c:379) [ 130.232961][ T404] process_vm_rw_single_vec+0x1b3/0x21f [ 130.234196][ T404] process_vm_rw_core+0x1b5/0x29a [ 130.235426][ T404] process_vm_rw (mm/process_vm_access.c:283) [ 130.236279][ T404] __x64_sys_process_vm_readv (mm/process_vm_access.c:291) [ 130.237362][ T404] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) [ 130.238214][ T404] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) [ 130.239264][ T404] [ 130.239689][ T404] write to 0xffff88817ef9b000 of 4096 bytes by task 404 on cpu 0: [ 130.241242][ T404] print_report (kernel/kcsan/report.c:396) [ 130.242084][ T404] kcsan_report_known_origin (kernel/kcsan/report.c:504 kernel/kcsan/report.c:694) [ 130.243157][ T404] kcsan_setup_watchpoint (kernel/kcsan/core.c:678) [ 130.244094][ T404] __kcsan_check_access (kernel/kcsan/core.c:754 kernel/kcsan/core.c:958) [ 130.245182][ T404] _copy_from_iter (arch/x86/include/asm/uaccess_64.h:107 arch/x86/include/asm/uaccess_64.h:107 arch/x86/include/asm/uaccess_64.h:127 lib/iov_iter.c:57 include/linux/iov_iter.h:51 include/linux/iov_iter.h:247 lib/iov_iter.c:273) [ 130.246089][ T404] copy_page_from_iter (lib/iov_iter.c:439) [ 130.246997][ T404] process_vm_rw_single_vec+0x1ac/0x21f [ 130.248212][ T404] process_vm_rw_core+0x1b5/0x29a [ 130.249458][ T404] process_vm_rw (mm/process_vm_access.c:283) [ 130.250377][ T404] __x64_sys_process_vm_writev (mm/process_vm_access.c:298) [ 130.251449][ T404] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) [ 130.252273][ T404] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) [ 130.253467][ T404] [ 130.253888][ T404] Reported by Kernel Concurrency Sanitizer on: [ 130.254959][ T404] CPU: 0 PID: 404 Comm: trinity-c3 Not tainted 6.6.0-rc2-00007-gf1982740f5e7 #1 bb9ae1a50ddb3ba41c398efbc8f00fb454c7c863 [ 130.257249][ T404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 130.259159][ T404] ================================================================== The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241025/202410251443.19c83c0a-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki