================================================================== 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: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 check_access kernel/kcsan/core.c:787 [inline] __tsan_read1+0x11e/0x180 kernel/kcsan/core.c:1022 xas_load+0x276/0x430 lib/xarray.c:244 xa_load+0x6f/0xe0 lib/xarray.c:1619 list_lru_from_memcg_idx mm/list_lru.c:56 [inline] list_lru_count_one+0x68/0x100 mm/list_lru.c:255 list_lru_shrink_count include/linux/list_lru.h:190 [inline] super_cache_count+0xe2/0x160 fs/super.c:264 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:2360 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2801 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2845 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:4976 alloc_pages_mpol+0xb3/0x250 mm/mempolicy.c:2419 alloc_frozen_pages_noprof mm/mempolicy.c:2490 [inline] alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2510 vm_area_alloc_pages mm/vmalloc.c:3642 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x6f2/0xe00 mm/vmalloc.c:3893 __bpf_map_area_alloc kernel/bpf/syscall.c:397 [inline] bpf_map_area_alloc+0xfa/0x150 kernel/bpf/syscall.c:404 array_map_alloc+0x1d6/0x3b0 kernel/bpf/arraymap.c:141 map_create+0x843/0xb90 kernel/bpf/syscall.c:1477 __sys_bpf+0x5ab/0x790 kernel/bpf/syscall.c:5818 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:5941 x64_sys_call+0x2478/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:322 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 3304 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:637 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:2360 try_charge mm/memcontrol.c:2502 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4768 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4785 mem_cgroup_charge include/linux/memcontrol.h:652 [inline] filemap_add_folio+0x4e/0x1b0 mm/filemap.c:964 page_cache_ra_unbounded+0x1f3/0x380 mm/readahead.c:275 do_page_cache_ra mm/readahead.c:327 [inline] page_cache_ra_order+0x102/0x120 mm/readahead.c:532 do_sync_mmap_readahead+0x249/0x280 mm/filemap.c:3271 filemap_fault+0x311/0xb40 mm/filemap.c:3412 __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: 0x00000000ffffa491 -> 0x00000000ffffa492 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3304 Comm: syz-executor Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================