================================================================== 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 0: tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline] tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:290 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x221/0x5f0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x235/0x4a0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 console_flush_all+0x590/0x7a0 arch/x86/include/asm/irqflags.h:-1 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xf4/0x350 kernel/printk/printk.c:3325 vprintk_emit+0x470/0x6c0 kernel/printk/printk.c:2450 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x7f/0xb0 kernel/printk/printk.c:2475 seq_buf_do_printk+0xf2/0x190 lib/seq_buf.c:126 mem_cgroup_print_oom_meminfo+0x16f/0x260 mm/memcontrol.c:1615 dump_header+0xa5/0x2d0 mm/oom_kill.c:469 oom_kill_process+0x341/0x4c0 mm/oom_kill.c:1040 out_of_memory+0x9d1/0xc20 mm/oom_kill.c:1178 mem_cgroup_out_of_memory+0x13f/0x190 mm/memcontrol.c:1667 mem_cgroup_oom mm/memcontrol.c:1690 [inline] try_charge_memcg+0x5f1/0x890 mm/memcontrol.c:2346 try_charge mm/memcontrol.c:2446 [inline] charge_memcg+0x50/0xc0 mm/memcontrol.c:4592 __mem_cgroup_charge+0x29/0xb0 mm/memcontrol.c:4609 mem_cgroup_charge include/linux/memcontrol.h:642 [inline] filemap_add_folio+0x56/0x1b0 mm/filemap.c:964 __filemap_get_folio+0x340/0x6b0 mm/filemap.c:1979 filemap_fault+0x46a/0xbc0 mm/filemap.c:3413 __do_fault+0xb6/0x200 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0xe9b/0x2e80 mm/memory.c:6309 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x3b9/0x6a0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 read to 0xffffffff868099c0 of 8 bytes by task 5652 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:643 count_shadow_nodes+0x6b/0x230 mm/workingset.c:680 do_shrink_slab+0x5e/0x6a0 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x4f2/0x860 mm/shrinker.c:628 shrink_node_memcgs mm/vmscan.c:5991 [inline] shrink_node+0x647/0x1da0 mm/vmscan.c:6030 shrink_zones mm/vmscan.c:6274 [inline] do_try_to_free_pages+0x3c6/0xc10 mm/vmscan.c:6336 try_to_free_mem_cgroup_pages+0x1e6/0x4a0 mm/vmscan.c:6664 try_charge_memcg+0x3ab/0x890 mm/memcontrol.c:2304 try_charge mm/memcontrol.c:2446 [inline] charge_memcg+0x50/0xc0 mm/memcontrol.c:4592 __mem_cgroup_charge+0x29/0xb0 mm/memcontrol.c:4609 mem_cgroup_charge include/linux/memcontrol.h:642 [inline] shmem_alloc_and_add_folio mm/shmem.c:1903 [inline] shmem_get_folio_gfp+0x482/0xd30 mm/shmem.c:2533 shmem_get_folio mm/shmem.c:2639 [inline] shmem_write_begin+0xa7/0x190 mm/shmem.c:3289 generic_perform_write+0x189/0x4b0 mm/filemap.c:4103 shmem_file_write_iter+0xc2/0xe0 mm/shmem.c:3464 __kernel_write_iter+0x243/0x4c0 fs/read_write.c:617 dump_emit_page fs/coredump.c:885 [inline] dump_user_range+0x5ed/0x8b0 fs/coredump.c:959 elf_core_dump+0x1d61/0x1ef0 fs/binfmt_elf.c:2128 do_coredump+0x1814/0x1f50 fs/coredump.c:759 get_signal+0xdb7/0x1080 kernel/signal.c:3019 arch_do_signal_or_restart+0x9a/0x480 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] irqentry_exit_to_user_mode+0xa7/0x120 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 exc_general_protection+0x342/0x4d0 arch/x86/kernel/traps.c:791 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617 value changed: 0x00000000ffffa9a3 -> 0x00000000ffffa9a4 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 5652 Comm: syz.4.595 Not tainted 6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ==================================================================