================================================================== 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 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705 check_access kernel/kcsan/core.c:753 [inline] __tsan_memset+0x1da/0x1f0 kernel/kcsan/core.c:1335 bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:266 [inline] ____bpf_probe_read_kernel_str kernel/trace/bpf_trace.c:273 [inline] bpf_probe_read_kernel_str+0x6c/0x70 kernel/trace/bpf_trace.c:270 bpf_prog_afb980c6e2e686a5+0x3f/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1350 [inline] __bpf_prog_run include/linux/filter.h:721 [inline] bpf_prog_run include/linux/filter.h:728 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline] bpf_trace_run2+0x107/0x1c0 kernel/trace/bpf_trace.c:2116 __traceiter_kfree+0x2e/0x50 include/trace/events/kmem.h:97 __do_trace_kfree include/trace/events/kmem.h:97 [inline] trace_kfree include/trace/events/kmem.h:97 [inline] kfree+0x351/0x400 mm/slub.c:6824 clear_mm_walk mm/vmscan.c:3871 [inline] lru_gen_shrink_lruvec mm/vmscan.c:5060 [inline] shrink_lruvec+0x2a5/0x1b50 mm/vmscan.c:5818 shrink_node_memcgs mm/vmscan.c:6054 [inline] shrink_node+0x686/0x2120 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+0x262/0x3c0 mm/swap_state.c:650 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 read to 0xffffffff868099c0 of 8 bytes by task 10966 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 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2799 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2843 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:5200 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2507 vm_area_alloc_pages mm/vmalloc.c:3647 [inline] __vmalloc_area_node mm/vmalloc.c:3724 [inline] __vmalloc_node_range_noprof+0x7a5/0xed0 mm/vmalloc.c:3897 __kvmalloc_node_noprof+0x483/0x670 mm/slub.c:7122 ip_set_alloc+0x24/0x30 net/netfilter/ipset/ip_set_core.c:261 hash_netiface_create+0x282/0x740 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x3cc/0x970 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x4c6/0x590 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2552 nfnetlink_rcv+0x167/0x16c0 net/netfilter/nfnetlink.c:669 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x145/0x180 net/socket.c:742 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2630 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2719 x64_sys_call+0x191e/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47 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: 0x00000000ffffd775 -> 0x00000000ffffd776 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 10966 Comm: syz.2.2498 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================