================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff86c09a00 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:253 [inline] tick_nohz_handler+0x8d/0x3d0 kernel/time/tick-sched.c:312 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x218/0x4f0 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x269/0x810 kernel/time/hrtimer.c:1911 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1f0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 should_watch kernel/kcsan/core.c:-1 [inline] check_access kernel/kcsan/core.c:752 [inline] __tsan_read8+0x10e/0x190 kernel/kcsan/core.c:1025 __netif_receive_skb_core+0x460/0x1980 net/core/dev.c:6039 __netif_receive_skb_list_core+0x113/0x500 net/core/dev.c:6251 __netif_receive_skb_list net/core/dev.c:6318 [inline] netif_receive_skb_list_internal+0x47d/0x5f0 net/core/dev.c:6409 netif_receive_skb_list+0x35/0x220 net/core/dev.c:6461 xdp_recv_frames net/bpf/test_run.c:269 [inline] xdp_test_run_batch net/bpf/test_run.c:350 [inline] bpf_test_run_xdp_live+0x104c/0x1360 net/bpf/test_run.c:379 bpf_prog_test_run_xdp+0x57b/0xa10 net/bpf/test_run.c:1397 bpf_prog_test_run+0x204/0x340 kernel/bpf/syscall.c:4722 __sys_bpf+0x52e/0x7e0 kernel/bpf/syscall.c:6246 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6339 x64_sys_call+0x10cb/0x3020 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff86c09a00 of 8 bytes by task 3320 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:638 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x6a0 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x538/0x880 mm/shrinker.c:628 shrink_node_memcgs mm/vmscan.c:6022 [inline] shrink_node+0x6bc/0x2130 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x1f5/0x470 mm/vmscan.c:6683 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2414 try_charge mm/memcontrol.c:2556 [inline] charge_memcg mm/memcontrol.c:4744 [inline] mem_cgroup_swapin_charge_folio+0x103/0x1f0 mm/memcontrol.c:4830 __swap_cache_prepare_and_add+0x386/0x530 mm/swap_state.c:517 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:575 swap_cluster_readahead+0x36b/0x3d0 mm/swap_state.c:768 swapin_readahead+0xde/0x840 mm/swap_state.c:924 do_swap_page+0x30d/0x2220 mm/memory.c:4802 handle_pte_fault mm/memory.c:6320 [inline] __handle_mm_fault mm/memory.c:6455 [inline] handle_mm_fault+0xb46/0x3020 mm/memory.c:6624 do_user_addr_fault+0x62f/0x1050 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 value changed: 0x00000000ffffa49d -> 0x00000000ffffa49e Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3320 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================