================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff868099c0 of 8 bytes by interrupt on cpu 1: tick_do_update_jiffies64+0x113/0x1c0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline] tick_nohz_handler+0x7f/0x2d0 kernel/time/tick-sched.c:290 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1d0 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 __sanitizer_cov_trace_const_cmp8+0x0/0x90 kernel/kcov.c:316 __pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline] protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline] pmd_pfn arch/x86/include/asm/pgtable.h:273 [inline] pte_lockptr include/linux/mm.h:3032 [inline] pte_offset_map_rw_nolock+0x155/0x1f0 mm/pgtable-generic.c:328 handle_pte_fault mm/memory.c:6180 [inline] __handle_mm_fault mm/memory.c:6336 [inline] handle_mm_fault+0x62f/0x2be0 mm/memory.c:6505 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x102a/0x1ed0 mm/gup.c:1428 populate_vma_page_range mm/gup.c:1860 [inline] __mm_populate+0x243/0x3a0 mm/gup.c:1963 mm_populate include/linux/mm.h:3471 [inline] vm_mmap_pgoff+0x232/0x2e0 mm/util.c:586 ksys_mmap_pgoff+0xc2/0x310 mm/mmap.c:604 x64_sys_call+0x14a3/0x3000 arch/x86/include/generated/asm/syscalls_64.h:10 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff868099c0 of 8 bytes by task 3325 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:635 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x680 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x448/0x760 mm/shrinker.c:628 shrink_node_memcgs mm/vmscan.c:6056 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6095 shrink_zones mm/vmscan.c:6339 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6401 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6729 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2356 try_charge mm/memcontrol.c:2498 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4701 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4718 mem_cgroup_charge include/linux/memcontrol.h:662 [inline] filemap_add_folio+0x111/0x360 mm/filemap.c:971 __filemap_get_folio+0x31e/0x650 mm/filemap.c:2022 filemap_fault+0x447/0xb60 mm/filemap.c:3499 __do_fault+0xbc/0x200 mm/memory.c:5281 do_read_fault mm/memory.c:5716 [inline] do_fault mm/memory.c:5850 [inline] do_pte_missing mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:6195 [inline] __handle_mm_fault mm/memory.c:6336 [inline] handle_mm_fault+0xf78/0x2be0 mm/memory.c:6505 do_user_addr_fault+0x630/0x1080 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 value changed: 0x00000000ffff9921 -> 0x00000000ffff9922 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3325 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ================================================================== EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.