================================================================== 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 0: 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:1761 [inline] __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705 mas_start lib/maple_tree.c:1374 [inline] mas_state_walk+0xd4/0x650 lib/maple_tree.c:3623 mas_walk lib/maple_tree.c:4936 [inline] mas_find_setup lib/maple_tree.c:6003 [inline] mas_find+0x3a9/0x610 lib/maple_tree.c:6043 vma_next include/linux/mm.h:864 [inline] get_next_vma mm/vmscan.c:3406 [inline] walk_pmd_range mm/vmscan.c:3757 [inline] walk_pud_range+0xfb5/0x1340 mm/vmscan.c:3782 walk_p4d_range mm/pagewalk.c:259 [inline] walk_pgd_range+0x55c/0x14e0 mm/pagewalk.c:305 __walk_page_range+0xdd/0x340 mm/pagewalk.c:412 walk_page_range_mm+0x352/0x4a0 mm/pagewalk.c:505 walk_page_range+0x56/0x70 mm/pagewalk.c:584 walk_mm mm/vmscan.c:3826 [inline] try_to_inc_max_seq+0x79d/0xa60 mm/vmscan.c:4081 get_nr_to_scan mm/vmscan.c:4845 [inline] try_to_shrink_lruvec+0x72b/0x7e0 mm/vmscan.c:4888 lru_gen_shrink_lruvec mm/vmscan.c:5041 [inline] shrink_lruvec+0x22e/0x1b40 mm/vmscan.c:5797 shrink_node_memcgs mm/vmscan.c:6033 [inline] shrink_node+0x686/0x2120 mm/vmscan.c:6074 shrink_zones mm/vmscan.c:6318 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6380 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6708 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2362 try_charge mm/memcontrol.c:2504 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4770 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4856 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:441 swap_cluster_readahead+0x277/0x3e0 mm/swap_state.c:613 swapin_readahead+0xde/0x6f0 mm/swap_state.c:811 do_swap_page+0x301/0x2430 mm/memory.c:4603 handle_pte_fault mm/memory.c:6072 [inline] __handle_mm_fault mm/memory.c:6212 [inline] handle_mm_fault+0x9a5/0x2be0 mm/memory.c:6381 do_user_addr_fault+0x636/0x1090 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:623 read to 0xffffffff868099c0 of 8 bytes by task 13923 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:639 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:6035 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6074 shrink_zones mm/vmscan.c:6318 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6380 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6708 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2362 try_charge mm/memcontrol.c:2504 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4770 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4787 mem_cgroup_charge include/linux/memcontrol.h:652 [inline] filemap_add_folio+0x4e/0x1b0 mm/filemap.c:964 __filemap_get_folio+0x31e/0x6b0 mm/filemap.c:1990 filemap_fault+0x41d/0xb40 mm/filemap.c:3422 __do_fault+0xb9/0x200 mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault mm/memory.c:6212 [inline] handle_mm_fault+0xf78/0x2be0 mm/memory.c:6381 do_user_addr_fault+0x636/0x1090 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:623 value changed: 0x000000010000ecc7 -> 0x000000010000ecc8 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 13923 Comm: syz-executor Not tainted 6.16.0-rc5-syzkaller-00193-g40f92e79b0aa #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================