================================================================== 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 1: 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+0x32/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 __sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:213 __netif_receive_skb_list_core+0x25/0x500 net/core/dev.c:6209 __netif_receive_skb_list net/core/dev.c:6298 [inline] netif_receive_skb_list_internal+0x47d/0x5f0 net/core/dev.c:6389 gro_normal_list include/net/gro.h:523 [inline] gro_flush_normal include/net/gro.h:531 [inline] napi_complete_done+0x19c/0x3f0 net/core/dev.c:6758 virtqueue_napi_complete drivers/net/virtio_net.c:749 [inline] virtnet_poll+0x1bfb/0x2080 drivers/net/virtio_net.c:3091 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x39/0xc0 kernel/softirq.c:723 common_interrupt+0x83/0x90 arch/x86/kernel/irq.c:326 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 preempt_schedule_irq+0x28/0x50 kernel/sched/core.c:7234 raw_irqentry_exit_cond_resched+0x4b/0x60 kernel/entry/common.c:196 irqentry_exit+0x91/0x520 kernel/entry/common.c:239 sysvec_apic_timer_interrupt+0x44/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 sctp_outq_tail+0x52/0x3c0 net/sctp/outqueue.c:293 sctp_cmd_send_msg net/sctp/sm_sideeffect.c:1119 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1785 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1204 [inline] sctp_do_sm+0x2532/0x3330 net/sctp/sm_sideeffect.c:1175 sctp_primitive_SEND+0x74/0x90 net/sctp/primitive.c:163 sctp_sendmsg_to_asoc+0xdeb/0xf50 net/sctp/socket.c:1872 sctp_sendmsg+0x13b9/0x1d60 net/sctp/socket.c:2030 inet_sendmsg+0xc5/0xd0 net/ipv4/af_inet.c:859 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x3f4/0x4d0 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto+0x76/0x90 net/socket.c:2209 x64_sys_call+0x2d35/0x3020 arch/x86/include/generated/asm/syscalls_64.h:45 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 14072 on cpu 0: 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:6021 [inline] shrink_node+0x6bc/0x2130 mm/vmscan.c:6060 shrink_zones mm/vmscan.c:6299 [inline] do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6361 try_to_free_mem_cgroup_pages+0x1f5/0x470 mm/vmscan.c:6682 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2414 obj_cgroup_charge_pages+0x23/0xc0 mm/memcontrol.c:2857 __memcg_kmem_charge_page+0x9e/0x170 mm/memcontrol.c:2901 __alloc_frozen_pages_noprof+0x18a/0x360 mm/page_alloc.c:5267 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2485 alloc_frozen_pages_noprof mm/mempolicy.c:2556 [inline] alloc_pages_noprof+0x8f/0x130 mm/mempolicy.c:2576 vm_area_alloc_pages mm/vmalloc.c:3731 [inline] __vmalloc_area_node mm/vmalloc.c:3876 [inline] __vmalloc_node_range_noprof+0xa46/0x12b0 mm/vmalloc.c:4064 __kvmalloc_node_noprof+0x3d4/0x650 mm/slub.c:6739 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+0x3cf/0x970 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x509/0x5d0 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x167/0x1720 net/netfilter/nfnetlink.c:669 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x5c8/0x6f0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x5af/0x600 net/socket.c:2592 ___sys_sendmsg+0x195/0x1e0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2681 x64_sys_call+0x194c/0x3020 arch/x86/include/generated/asm/syscalls_64.h:47 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 value changed: 0x00000000fffff111 -> 0x00000000fffff112 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14072 Comm: syz.0.2859 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================