================================================================== 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 check_access kernel/kcsan/core.c:787 [inline] __tsan_read8+0x122/0x190 kernel/kcsan/core.c:1025 page_is_pfmemalloc include/linux/mm.h:2344 [inline] skb_propagate_pfmemalloc include/linux/skbuff.h:3618 [inline] build_skb_around+0x103/0x200 net/core/skbuff.c:509 __xdp_build_skb_from_frame+0xaa/0x2f0 net/core/xdp.c:816 xdp_recv_frames net/bpf/test_run.c:261 [inline] xdp_test_run_batch net/bpf/test_run.c:350 [inline] bpf_test_run_xdp_live+0xe15/0x11c0 net/bpf/test_run.c:379 bpf_prog_test_run_xdp+0x525/0x970 net/bpf/test_run.c:1320 bpf_prog_test_run+0x22a/0x390 kernel/bpf/syscall.c:4688 __sys_bpf+0x4c0/0x7c0 kernel/bpf/syscall.c:6167 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6257 x64_sys_call+0x2aee/0x3000 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 12423 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_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4787 __read_swap_cache_async+0x17b/0x2d0 mm/swap_state.c:481 swap_cluster_readahead+0x362/0x3c0 mm/swap_state.c:669 swapin_readahead+0xde/0x6f0 mm/swap_state.c:813 do_swap_page+0x2ae/0x2370 mm/memory.c:4713 handle_pte_fault mm/memory.c:6180 [inline] __handle_mm_fault mm/memory.c:6318 [inline] handle_mm_fault+0x9a5/0x2be0 mm/memory.c:6487 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: 0x000000010000002b -> 0x000000010000002c Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 12423 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================