================================================================== 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 console_flush_all+0x55b/0x730 arch/x86/include/asm/irqflags.h:-1 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xa1/0x330 kernel/printk/printk.c:3325 vprintk_emit+0x388/0x650 kernel/printk/printk.c:2450 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2475 validate_nla lib/nlattr.c:414 [inline] __nla_validate_parse+0x1227/0x1d00 lib/nlattr.c:635 __nla_parse+0x40/0x60 lib/nlattr.c:732 __nlmsg_parse include/net/netlink.h:787 [inline] nlmsg_parse_deprecated include/net/netlink.h:828 [inline] rtnl_newlink+0xf1/0x12d0 net/core/rtnetlink.c:3960 rtnetlink_rcv_msg+0x5fb/0x6d0 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2551 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+0x142/0x180 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 9533 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:639 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:2362 try_charge mm/memcontrol.c:2504 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4770 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4856 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:441 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:632 swapin_readahead+0xde/0x6f0 mm/swap_state.c:811 do_swap_page+0x301/0x2430 mm/memory.c:4603 handle_pte_fault mm/memory.c:6072 [inline] __handle_mm_fault mm/memory.c:6212 [inline] handle_mm_fault+0x9a5/0x2be0 mm/memory.c:6381 do_user_addr_fault+0x3fe/0x1090 arch/x86/mm/fault.c:1387 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 __put_user_nocheck_4+0x3/0x10 arch/x86/lib/putuser.S:97 ____sys_recvmsg+0x1a1/0x280 net/socket.c:2799 ___sys_recvmsg+0x11f/0x370 net/socket.c:2828 __sys_recvmsg net/socket.c:2861 [inline] __do_sys_recvmsg net/socket.c:2867 [inline] __se_sys_recvmsg net/socket.c:2864 [inline] __x64_sys_recvmsg+0xd1/0x160 net/socket.c:2864 x64_sys_call+0xf19/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:48 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: 0x00000000ffffd447 -> 0x00000000ffffd448 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 9533 Comm: syz.4.2087 Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================