================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff86c07a00 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+0x88/0x380 kernel/time/tick-sched.c:310 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x1f8/0x510 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x257/0x810 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1c0 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 check_kcov_mode kernel/kcov.c:185 [inline] write_comp_data kernel/kcov.c:246 [inline] __sanitizer_cov_trace_cmp8+0x36/0x90 kernel/kcov.c:294 __vm_normal_page mm/memory.c:742 [inline] vm_normal_page mm/memory.c:770 [inline] zap_present_ptes mm/memory.c:1700 [inline] do_zap_pte_range mm/memory.c:1832 [inline] zap_pte_range mm/memory.c:1934 [inline] zap_pmd_range mm/memory.c:2020 [inline] zap_pud_range mm/memory.c:2048 [inline] zap_p4d_range mm/memory.c:2069 [inline] __zap_vma_range+0x96e/0x2c60 mm/memory.c:2109 unmap_vmas+0x200/0x310 mm/memory.c:2178 exit_mmap+0x1a2/0x5e0 mm/mmap.c:1300 __mmput+0x28/0x1c0 kernel/fork.c:1182 mmput+0x40/0x50 kernel/fork.c:1205 exit_mm+0x113/0x1a0 kernel/exit.c:610 do_exit+0x438/0x1500 kernel/exit.c:992 do_group_exit+0xfe/0x140 kernel/exit.c:1147 get_signal+0xe07/0xf10 kernel/signal.c:3038 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x15d/0x8c0 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x23c/0x3c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff86c07a00 of 8 bytes by task 11382 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x50 mm/memcontrol.c:743 count_shadow_nodes+0x6a/0x250 mm/workingset.c:694 do_shrink_slab+0x61/0x650 mm/shrinker.c:380 shrink_slab_memcg mm/shrinker.c:551 [inline] shrink_slab+0x53b/0x8e0 mm/shrinker.c:629 shrink_node_memcgs mm/vmscan.c:6129 [inline] shrink_node+0x6d9/0x20f0 mm/vmscan.c:6171 shrink_zones mm/vmscan.c:6410 [inline] do_try_to_free_pages+0x408/0xc90 mm/vmscan.c:6472 try_to_free_mem_cgroup_pages+0x201/0x420 mm/vmscan.c:6794 try_charge_memcg+0x375/0xa00 mm/memcontrol.c:2655 obj_cgroup_charge_pages mm/memcontrol.c:3097 [inline] __memcg_kmem_charge_page+0x199/0x3a0 mm/memcontrol.c:3141 __alloc_frozen_pages_noprof+0x18a/0x350 mm/page_alloc.c:5321 alloc_pages_mpol+0xa9/0x1d0 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0x8f/0x140 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3742 [inline] __vmalloc_area_node mm/vmalloc.c:3892 [inline] __vmalloc_node_range_noprof+0xae9/0x11e0 mm/vmalloc.c:4082 __kvmalloc_node_noprof+0x3a0/0x590 mm/slub.c:6961 futex_hash_allocate+0x192/0x920 kernel/futex/core.c:1823 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1995 __do_sys_prctl kernel/sys.c:2885 [inline] __se_sys_prctl+0x4f4/0x13b0 kernel/sys.c:2534 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534 x64_sys_call+0x2533/0x3020 arch/x86/include/generated/asm/syscalls_64.h:158 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000010001acbe -> 0x000000010001acc0 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 11382 Comm: syz.6.9972 Tainted: G W syzkaller #0 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 ==================================================================