================================================================== BUG: KCSAN: data-race in __tmigr_cpu_activate / tmigr_update_events write to 0xffff888237c205e4 of 1 bytes by task 0 on cpu 0: __tmigr_cpu_activate+0x55/0x1f0 kernel/time/timer_migration.c:682 tmigr_cpu_activate+0x8a/0xc0 kernel/time/timer_migration.c:705 timer_clear_idle+0x28/0x100 kernel/time/timer.c:2379 tick_nohz_restart_sched_tick+0x22/0x110 kernel/time/tick-sched.c:1095 tick_nohz_idle_update_tick kernel/time/tick-sched.c:1440 [inline] tick_nohz_idle_exit+0xfe/0x1d0 kernel/time/tick-sched.c:1483 do_idle+0x1ee/0x230 kernel/sched/idle.c:345 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430 rest_init+0xef/0xf0 init/main.c:747 start_kernel+0x581/0x5e0 init/main.c:1103 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x12c/0x137 read to 0xffff888237c205e4 of 1 bytes by task 0 on cpu 1: tmigr_next_groupevt kernel/time/timer_migration.c:569 [inline] tmigr_next_groupevt_expires kernel/time/timer_migration.c:611 [inline] tmigr_update_events+0x41d/0x5d0 kernel/time/timer_migration.c:846 tmigr_inactive_up kernel/time/timer_migration.c:1318 [inline] __walk_groups kernel/time/timer_migration.c:488 [inline] walk_groups kernel/time/timer_migration.c:500 [inline] __tmigr_cpu_deactivate+0x283/0x470 kernel/time/timer_migration.c:1354 tmigr_cpu_deactivate+0x66/0x180 kernel/time/timer_migration.c:1378 timer_use_tmigr kernel/time/timer.c:2192 [inline] __get_next_timer_interrupt+0x137/0x530 kernel/time/timer.c:2267 timer_base_try_to_set_idle+0x54/0x60 kernel/time/timer.c:2356 tick_nohz_stop_tick kernel/time/tick-sched.c:987 [inline] tick_nohz_idle_stop_tick+0x15b/0x640 kernel/time/tick-sched.c:1226 cpuidle_idle_call kernel/sched/idle.c:232 [inline] do_idle+0x178/0x230 kernel/sched/idle.c:332 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430 start_secondary+0x94/0xa0 arch/x86/kernel/smpboot.c:313 common_startup_64+0x12c/0x137 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ==================================================================