================================================================== 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 mem_cgroup_print_oom_meminfo+0x1ff/0x250 mm/memcontrol.c:1583 dump_header+0xa0/0x220 mm/oom_kill.c:469 oom_kill_process+0x342/0x400 mm/oom_kill.c:1040 out_of_memory+0x979/0xb80 mm/oom_kill.c:1178 mem_cgroup_out_of_memory mm/memcontrol.c:1649 [inline] mem_cgroup_oom mm/memcontrol.c:1672 [inline] try_charge_memcg+0x5e6/0x9e0 mm/memcontrol.c:2399 try_charge mm/memcontrol.c:2499 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4702 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4719 mem_cgroup_charge include/linux/memcontrol.h:654 [inline] shmem_alloc_and_add_folio mm/shmem.c:1957 [inline] shmem_get_folio_gfp+0x470/0xd60 mm/shmem.c:2597 shmem_get_folio mm/shmem.c:2703 [inline] shmem_write_begin+0xa8/0x190 mm/shmem.c:3353 generic_perform_write+0x181/0x490 mm/filemap.c:4175 shmem_file_write_iter+0xc5/0xf0 mm/shmem.c:3528 __kernel_write_iter+0x2d3/0x540 fs/read_write.c:619 dump_emit_page fs/coredump.c:1296 [inline] dump_user_range+0x61e/0x8f0 fs/coredump.c:1370 elf_core_dump+0x1e00/0x1f90 fs/binfmt_elf.c:2085 coredump_write+0xb0d/0xe30 fs/coredump.c:1049 vfs_coredump+0x142f/0x20c0 fs/coredump.c:1168 get_signal+0xd85/0xf70 kernel/signal.c:3019 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:40 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x5e/0xa0 kernel/entry/common.c:73 irqentry_exit+0x12/0x50 kernel/entry/common.c:177 exc_general_protection+0x15b/0x1f0 arch/x86/kernel/traps.c:792 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617 read to 0xffffffff868099c0 of 8 bytes by task 15578 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:634 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:6053 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6092 shrink_zones mm/vmscan.c:6336 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6398 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6726 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2357 try_charge mm/memcontrol.c:2499 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4702 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4788 __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:4586 handle_pte_fault mm/memory.c:6055 [inline] __handle_mm_fault mm/memory.c:6195 [inline] handle_mm_fault+0x9a5/0x2c20 mm/memory.c:6364 faultin_page mm/gup.c:1144 [inline] __get_user_pages+0x102e/0x1fa0 mm/gup.c:1446 __get_user_pages_locked mm/gup.c:1712 [inline] get_dump_page+0xb5/0x250 mm/gup.c:2212 dump_user_range+0x145/0x8f0 fs/coredump.c:1364 elf_core_dump+0x1e00/0x1f90 fs/binfmt_elf.c:2085 coredump_write+0xb0d/0xe30 fs/coredump.c:1049 vfs_coredump+0x142f/0x20c0 fs/coredump.c:1168 get_signal+0xd85/0xf70 kernel/signal.c:3019 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:40 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x5e/0xa0 kernel/entry/common.c:73 irqentry_exit+0x12/0x50 kernel/entry/common.c:177 exc_general_protection+0x15b/0x1f0 arch/x86/kernel/traps.c:792 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617 value changed: 0x00000001000003f1 -> 0x00000001000003f2 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 15578 Comm: syz.3.4141 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ==================================================================