================================================================== 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 dump_stack_lvl+0x11c/0x140 lib/dump_stack.c:124 dump_stack+0x15/0x1b lib/dump_stack.c:129 dump_header+0x81/0x220 mm/oom_kill.c:467 oom_kill_process+0x342/0x400 mm/oom_kill.c:1040 out_of_memory+0x979/0xb80 mm/oom_kill.c:1178 mem_cgroup_out_of_memory mm/memcontrol.c:1652 [inline] mem_cgroup_oom mm/memcontrol.c:1675 [inline] try_charge_memcg+0x5e6/0x9e0 mm/memcontrol.c:2402 try_charge mm/memcontrol.c:2502 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4768 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4854 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:441 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:632 swapin_readahead+0xde/0x6f0 mm/swap_state.c:811 do_swap_page+0x301/0x2430 mm/memory.c:4621 handle_pte_fault mm/memory.c:6090 [inline] __handle_mm_fault mm/memory.c:6230 [inline] handle_mm_fault+0x9a5/0x2be0 mm/memory.c:6399 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 15591 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+0x60/0x680 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:6045 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6084 shrink_zones mm/vmscan.c:6328 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6390 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6718 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_noprof+0x9/0x20 mm/page_alloc.c:4993 __alloc_pages_node_noprof include/linux/gfp.h:284 [inline] alloc_pages_node_noprof include/linux/gfp.h:311 [inline] bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:125 [inline] bpf_ringbuf_alloc+0x1ed/0x3d0 kernel/bpf/ringbuf.c:173 ringbuf_map_alloc+0x157/0x1c0 kernel/bpf/ringbuf.c:208 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+0x2aea/0x2ff0 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 value changed: 0x00000001000108fb -> 0x00000001000108fc Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 15591 Comm: syz.4.15446 Tainted: G W 6.16.0-syzkaller-04405-g4b290aae788e #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================