==================================================================
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:1777 [inline]
 __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x5f/0x1d0 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1052
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
 lruvec_page_state_local+0x0/0xe0 mm/memcontrol.c:397
 count_shadow_nodes+0x19b/0x230 mm/workingset.c:681
 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:6056 [inline]
 shrink_node+0x6c3/0x2120 mm/vmscan.c:6095
 shrink_zones mm/vmscan.c:6339 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6401
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6729
 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2356
 try_charge mm/memcontrol.c:2498 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4701
 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4718
 mem_cgroup_charge include/linux/memcontrol.h:662 [inline]
 shmem_alloc_and_add_folio mm/shmem.c:1923 [inline]
 shmem_get_folio_gfp+0x470/0xd60 mm/shmem.c:2536
 shmem_get_folio mm/shmem.c:2642 [inline]
 shmem_write_begin+0xa8/0x190 mm/shmem.c:3292
 generic_perform_write+0x184/0x490 mm/filemap.c:4254
 shmem_file_write_iter+0xc5/0xf0 mm/shmem.c:3467
 __kernel_write_iter+0x2d6/0x540 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x61e/0x8f0 fs/coredump.c:1372
 elf_core_dump+0x1de7/0x1f80 fs/binfmt_elf.c:2111
 coredump_write+0xb12/0xe30 fs/coredump.c:1049
 vfs_coredump+0x143a/0x20d0 fs/coredump.c:1170
 get_signal+0xd84/0xf70 kernel/signal.c:3019
 arch_do_signal_or_restart+0x96/0x440 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+0x5b/0xa0 kernel/entry/common.c:73
 irqentry_exit+0x12/0x50 kernel/entry/common.c:191
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618

read to 0xffffffff868099c0 of 8 bytes by task 18551 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:635
 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:6056 [inline]
 shrink_node+0x6c3/0x2120 mm/vmscan.c:6095
 shrink_zones mm/vmscan.c:6339 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6401
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6729
 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2356
 try_charge mm/memcontrol.c:2498 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4701
 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4718
 mem_cgroup_charge include/linux/memcontrol.h:662 [inline]
 shmem_alloc_and_add_folio mm/shmem.c:1923 [inline]
 shmem_get_folio_gfp+0x470/0xd60 mm/shmem.c:2536
 shmem_get_folio mm/shmem.c:2642 [inline]
 shmem_write_begin+0xa8/0x190 mm/shmem.c:3292
 generic_perform_write+0x184/0x490 mm/filemap.c:4254
 shmem_file_write_iter+0xc5/0xf0 mm/shmem.c:3467
 __kernel_write_iter+0x2d6/0x540 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x61e/0x8f0 fs/coredump.c:1372
 elf_core_dump+0x1de7/0x1f80 fs/binfmt_elf.c:2111
 coredump_write+0xb12/0xe30 fs/coredump.c:1049
 vfs_coredump+0x143a/0x20d0 fs/coredump.c:1170
 get_signal+0xd84/0xf70 kernel/signal.c:3019
 arch_do_signal_or_restart+0x96/0x440 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+0x5b/0xa0 kernel/entry/common.c:73
 irqentry_exit+0x12/0x50 kernel/entry/common.c:191
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618

value changed: 0x00000000fffff0d3 -> 0x00000000fffff0d4

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 18551 Comm: syz.4.4224 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
==================================================================
syz.4.4224 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 UID: 0 PID: 18551 Comm: syz.4.4224 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack+0x1d/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0xe8/0x140 lib/dump_stack.c:120
 dump_stack+0x15/0x1b lib/dump_stack.c:129
 dump_header+0x81/0x220 mm/oom_kill.c:467
 oom_kill_process+0x342/0x400 mm/oom_kill.c:1046
 out_of_memory+0x979/0xb80 mm/oom_kill.c:1184
 mem_cgroup_out_of_memory mm/memcontrol.c:1650 [inline]
 mem_cgroup_oom mm/memcontrol.c:1673 [inline]
 try_charge_memcg+0x610/0xa10 mm/memcontrol.c:2398
 try_charge mm/memcontrol.c:2498 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4701
 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4718
 mem_cgroup_charge include/linux/memcontrol.h:662 [inline]
 shmem_alloc_and_add_folio mm/shmem.c:1923 [inline]
 shmem_get_folio_gfp+0x470/0xd60 mm/shmem.c:2536
 shmem_get_folio mm/shmem.c:2642 [inline]
 shmem_write_begin+0xa8/0x190 mm/shmem.c:3292
 generic_perform_write+0x184/0x490 mm/filemap.c:4254
 shmem_file_write_iter+0xc5/0xf0 mm/shmem.c:3467
 __kernel_write_iter+0x2d6/0x540 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x61e/0x8f0 fs/coredump.c:1372
 elf_core_dump+0x1de7/0x1f80 fs/binfmt_elf.c:2111
 coredump_write+0xb12/0xe30 fs/coredump.c:1049
 vfs_coredump+0x143a/0x20d0 fs/coredump.c:1170
 get_signal+0xd84/0xf70 kernel/signal.c:3019
 arch_do_signal_or_restart+0x96/0x440 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+0x5b/0xa0 kernel/entry/common.c:73
 irqentry_exit+0x12/0x50 kernel/entry/common.c:191
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000200000000458 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f4dfde86090 RCX: 00007f4dfdc2f6c9
RDX: 0000200000000480 RSI: 0000200000000450 RDI: 0000000000100000
RBP: 00007f4dfdcb1f91 R08: 0000200000000640 R09: 0000200000000640
R10: 0000200000000600 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f4dfde86128 R14: 00007f4dfde86090 R15: 00007fffec048418
 </TASK>
memory: usage 307200kB, limit 307200kB, failcnt 30609
memory+swap: usage 431656kB, limit 9007199254740988kB, failcnt 0
kmem: usage 9656kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz4:
cache 301801472
rss 2314240
shmem 301793280
mapped_file 3153920
dirty 0
writeback 0
workingset_refault_anon 6207
workingset_refault_file 8325
swap 127442944
swapcached 552960
pgpgin 394943
pgpgout 320557
pgfault 262519
pgmajfault 1487
inactive_anon 58392576
active_anon 246247424
inactive_file 20480
active_file 12288
unevictable 0
hierarchical_memory_limit 314572800
hierarchical_memsw_limit 9223372036854771712
total_cache 301801472
total_rss 2314240
total_shmem 301793280
total_mapped_file 3153920
total_dirty 0
total_writeback 0
total_workingset_refault_anon 6207
total_workingset_refault_file 8325
total_swap 127442944
total_swapcached 552960
total_pgpgin 394943
total_pgpgout 320557
total_pgfault 262519
total_pgmajfault 1487
total_inactive_anon 58392576
total_active_anon 246247424
total_inactive_file 20480
total_active_file 12288
total_unevictable 0
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz4,task_memcg=/syz4,task=syz.4.4224,pid=18539,uid=0
Memory cgroup out of memory: Killed process 18539 (syz.4.4224) total-vm:93324kB, anon-rss:1164kB, file-rss:57196kB, shmem-rss:0kB, UID:0 pgtables:204kB oom_score_adj:1000
syz.4.4224 (18551) used greatest stack depth: 7288 bytes left