================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff86a09a00 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:1777 [inline] __hrtimer_run_queues+0x20f/0x590 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x269/0x810 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1d0 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 is_atomic kernel/kcsan/core.c:249 [inline] should_watch kernel/kcsan/core.c:277 [inline] check_access kernel/kcsan/core.c:752 [inline] __tsan_read8+0xe8/0x190 kernel/kcsan/core.c:1025 is_zero_pfn include/linux/pgtable.h:1760 [inline] get_pte_pfn+0x85/0x3e0 mm/vmscan.c:3398 walk_pte_range mm/vmscan.c:3529 [inline] walk_pmd_range mm/vmscan.c:3712 [inline] walk_pud_range+0x82a/0x1310 mm/vmscan.c:3748 walk_p4d_range mm/pagewalk.c:257 [inline] walk_pgd_range+0x55c/0x14d0 mm/pagewalk.c:303 __walk_page_range+0xdd/0x340 mm/pagewalk.c:410 walk_page_range_mm_unsafe+0x3be/0x520 mm/pagewalk.c:506 walk_page_range+0x56/0x70 mm/pagewalk.c:585 walk_mm mm/vmscan.c:3792 [inline] try_to_inc_max_seq+0x7a4/0xa40 mm/vmscan.c:4057 get_nr_to_scan mm/vmscan.c:4827 [inline] try_to_shrink_lruvec+0x8b6/0x960 mm/vmscan.c:4870 lru_gen_shrink_lruvec mm/vmscan.c:5023 [inline] shrink_lruvec+0x24e/0x1bc0 mm/vmscan.c:5784 shrink_node_memcgs mm/vmscan.c:6020 [inline] shrink_node+0x68e/0x2000 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x404/0xcc0 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x222/0x470 mm/vmscan.c:6690 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2388 try_charge mm/memcontrol.c:2530 [inline] charge_memcg mm/memcontrol.c:4728 [inline] __mem_cgroup_charge+0x65/0x150 mm/memcontrol.c:4745 mem_cgroup_charge include/linux/memcontrol.h:663 [inline] filemap_add_folio+0x110/0x350 mm/filemap.c:959 page_cache_ra_unbounded+0x204/0x440 mm/readahead.c:280 do_page_cache_ra mm/readahead.c:332 [inline] page_cache_ra_order+0x145/0x220 mm/readahead.c:535 do_sync_mmap_readahead+0x33d/0x350 mm/filemap.c:3400 filemap_fault+0x362/0xbb0 mm/filemap.c:3549 __do_fault+0xbc/0x200 mm/memory.c:5323 do_read_fault mm/memory.c:5758 [inline] do_fault mm/memory.c:5892 [inline] do_pte_missing mm/memory.c:4404 [inline] handle_pte_fault mm/memory.c:6276 [inline] __handle_mm_fault mm/memory.c:6414 [inline] handle_mm_fault+0x11d7/0x3030 mm/memory.c:6583 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 read to 0xffffffff86a09a00 of 8 bytes by task 29187 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:636 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x670 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+0x6cb/0x2000 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x404/0xcc0 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x222/0x470 mm/vmscan.c:6690 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2388 obj_cgroup_charge_pages+0x23/0xc0 mm/memcontrol.c:2823 __memcg_kmem_charge_page+0x9e/0x170 mm/memcontrol.c:2867 __alloc_frozen_pages_noprof+0x18a/0x350 mm/page_alloc.c:5257 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0x8f/0x130 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3718 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0xa46/0x12b0 mm/vmalloc.c:4051 __kvmalloc_node_noprof+0x471/0x680 mm/slub.c:7172 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+0x17ba/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000010000820f -> 0x0000000100008210 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 29187 Comm: syz.1.8663 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 ==================================================================