================================================================== 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:1761 [inline] __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x3c/0x60 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] pcpu_alloc_noprof+0x9c7/0x1210 mm/percpu.c:1858 fib6_nh_init+0x5d8/0x15a0 net/ipv6/route.c:3677 ip6_route_info_create_nh+0xc7/0x610 net/ipv6/route.c:3892 ip6_route_add+0x6e/0x170 net/ipv6/route.c:3944 addrconf_prefix_route net/ipv6/addrconf.c:2487 [inline] addrconf_add_linklocal+0x2a6/0x340 net/ipv6/addrconf.c:3312 addrconf_addr_gen+0x314/0x360 net/ipv6/addrconf.c:3441 addrconf_init_auto_addrs+0x585/0x6f0 net/ipv6/addrconf.c:-1 addrconf_notify+0x72c/0x930 net/ipv6/addrconf.c:3739 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x6c/0x1b0 kernel/notifier.c:453 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2230 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] __dev_notify_flags+0xff/0x1a0 net/core/dev.c:-1 netif_change_flags+0xac/0xd0 net/core/dev.c:9526 do_setlink+0x9d2/0x2810 net/core/rtnetlink.c:3141 rtnl_group_changelink net/core/rtnetlink.c:3773 [inline] __rtnl_newlink net/core/rtnetlink.c:3927 [inline] rtnl_newlink+0xd8b/0x12d0 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x5fe/0x6d0 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x120/0x220 net/netlink/af_netlink.c:2552 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6971 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5a5/0x680 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x145/0x180 net/socket.c:727 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2566 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2655 x64_sys_call+0x2999/0x2fb0 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 read to 0xffffffff868099c0 of 8 bytes by task 3306 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:637 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:6035 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6074 shrink_zones mm/vmscan.c:6318 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6380 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6708 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2360 try_charge mm/memcontrol.c:2502 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4768 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4785 mem_cgroup_charge include/linux/memcontrol.h:652 [inline] filemap_add_folio+0x4e/0x1b0 mm/filemap.c:964 __filemap_get_folio+0x31e/0x6b0 mm/filemap.c:1990 filemap_fault+0x41d/0xb40 mm/filemap.c:3422 __do_fault+0xb9/0x200 mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault mm/memory.c:6212 [inline] handle_mm_fault+0xf78/0x2be0 mm/memory.c:6381 do_user_addr_fault+0x636/0x1090 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:623 value changed: 0x0000000100025ca5 -> 0x0000000100025ca6 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3306 Comm: syz-executor Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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