================================================================== BUG: KCSAN: data-race in tick_nohz_handler / tick_nohz_next_event write to 0xffffffff8652ebb0 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer kernel/time/tick-sched.c:224 [inline] tick_nohz_handler+0x2bc/0x2d0 kernel/time/tick-sched.c:287 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x210/0x7b0 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __tsan_read4+0x12/0x180 kernel/kcsan/core.c:1024 zone_to_nid include/linux/mmzone.h:1507 [inline] zonelist_node_idx include/linux/mmzone.h:1615 [inline] zref_in_nodemask mm/mmzone.c:49 [inline] __next_zones_zonelist+0x4f/0x90 mm/mmzone.c:69 next_zones_zonelist include/linux/mmzone.h:1643 [inline] first_zones_zonelist include/linux/mmzone.h:1667 [inline] prepare_alloc_pages mm/page_alloc.c:4361 [inline] __alloc_pages+0x24c/0x360 mm/page_alloc.c:4564 alloc_pages_mpol+0xb1/0x1e0 mm/mempolicy.c:2264 alloc_pages+0xe1/0x100 mm/mempolicy.c:2335 pipe_write+0x34e/0xd30 fs/pipe.c:513 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x771/0x8e0 fs/read_write.c:590 ksys_write+0xeb/0x1b0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:652 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x72/0x7a read to 0xffffffff8652ebb0 of 4 bytes by task 0 on cpu 1: tick_nohz_next_event+0x1ee/0x2d0 kernel/time/tick-sched.c:949 tick_nohz_get_sleep_length+0xac/0x110 kernel/time/tick-sched.c:1343 menu_select+0x822/0x1070 drivers/cpuidle/governors/menu.c:286 cpuidle_select+0x45/0x60 drivers/cpuidle/cpuidle.c:359 cpuidle_idle_call kernel/sched/idle.c:229 [inline] do_idle+0x161/0x230 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: 0xffffffff -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 6.9.0-rc2-syzkaller-00193-gc88b9b4cde17 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ==================================================================