================================================================== BUG: KCSAN: data-race in __mem_cgroup_flush_stats / tick_do_update_jiffies64 read-write to 0xffffffff866089c0 of 8 bytes by interrupt on cpu 1: tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline] tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:290 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x235/0x4a0 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 kcsan_setup_watchpoint+0x404/0x410 kernel/kcsan/core.c:705 tlb_flush_rmap_batch mm/mmu_gather.c:56 [inline] tlb_flush_rmaps+0x259/0x410 mm/mmu_gather.c:89 zap_pte_range mm/memory.c:1703 [inline] zap_pmd_range mm/memory.c:1753 [inline] zap_pud_range mm/memory.c:1782 [inline] zap_p4d_range mm/memory.c:1803 [inline] unmap_page_range+0x1fa6/0x2380 mm/memory.c:1824 unmap_single_vma+0x142/0x1d0 mm/memory.c:1870 unmap_vmas+0x18d/0x2b0 mm/memory.c:1914 exit_mmap+0x18a/0x680 mm/mmap.c:1667 __mmput+0x28/0x1d0 kernel/fork.c:1353 mmput+0x4c/0x60 kernel/fork.c:1375 exit_mm+0xe4/0x190 kernel/exit.c:570 do_exit+0x55e/0x17f0 kernel/exit.c:925 do_group_exit+0x142/0x150 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1096 x64_sys_call+0x2db8/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff866089c0 of 8 bytes by task 3397 on cpu 0: __mem_cgroup_flush_stats+0x8d/0x150 mm/memcontrol.c:612 flush_memcg_stats_dwork+0x21/0x50 mm/memcontrol.c:650 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000ffffa269 -> 0x00000000ffffa26a Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3397 Comm: kworker/u8:7 Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound flush_memcg_stats_dwork ==================================================================