==================================================================
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 1:
 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+0x8d/0x3d0 kernel/time/tick-sched.c:312
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x276/0x4f0 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x261/0x850 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x5f/0x1c0 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1061
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
 _raw_spin_unlock_irq+0x12/0x30 kernel/locking/spinlock.c:206
 spin_unlock_irq include/linux/spinlock.h:402 [inline]
 lruvec_unlock_irq include/linux/memcontrol.h:1486 [inline]
 inc_max_seq+0x815/0x840 mm/vmscan.c:3998
 try_to_inc_max_seq+0x8a1/0xa30 mm/vmscan.c:4050
 get_nr_to_scan mm/vmscan.c:4966 [inline]
 try_to_shrink_lruvec+0xba5/0xc20 mm/vmscan.c:5005
 lru_gen_shrink_lruvec mm/vmscan.c:5173 [inline]
 shrink_lruvec+0x256/0x1bc0 mm/vmscan.c:5932
 shrink_node_memcgs mm/vmscan.c:6171 [inline]
 shrink_node+0x697/0x20a0 mm/vmscan.c:6215
 shrink_zones mm/vmscan.c:6454 [inline]
 do_try_to_free_pages+0x408/0xc90 mm/vmscan.c:6516
 try_to_free_mem_cgroup_pages+0x201/0x420 mm/vmscan.c:6838
 try_charge_memcg+0x373/0xa10 mm/memcontrol.c:2630
 obj_cgroup_charge_pages mm/memcontrol.c:3072 [inline]
 __memcg_kmem_charge_page+0x1ce/0x3d0 mm/memcontrol.c:3116
 __alloc_frozen_pages_noprof+0x18a/0x350 mm/page_alloc.c:5238
 alloc_pages_mpol+0xb3/0x260 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:3728 [inline]
 __vmalloc_area_node mm/vmalloc.c:3878 [inline]
 __vmalloc_node_range_noprof+0xaed/0x11c0 mm/vmalloc.c:4064
 __kvmalloc_node_noprof+0x3d4/0x640 mm/slub.c:6861
 futex_hash_allocate+0x190/0x9a0 kernel/futex/core.c:1815
 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1961
 __do_sys_prctl kernel/sys.c:2885 [inline]
 __se_sys_prctl+0x4f4/0x1400 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+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff86c07a00 of 8 bytes by task 23834 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x50 mm/memcontrol.c:743
 count_shadow_nodes+0x6a/0x250 mm/workingset.c:692
 do_shrink_slab+0x63/0x660 mm/shrinker.c:382
 shrink_slab_memcg mm/shrinker.c:553 [inline]
 shrink_slab+0x545/0x8f0 mm/shrinker.c:631
 shrink_node_memcgs mm/vmscan.c:6173 [inline]
 shrink_node+0x6d4/0x20a0 mm/vmscan.c:6215
 shrink_zones mm/vmscan.c:6454 [inline]
 do_try_to_free_pages+0x408/0xc90 mm/vmscan.c:6516
 try_to_free_mem_cgroup_pages+0x201/0x420 mm/vmscan.c:6838
 try_charge_memcg+0x373/0xa10 mm/memcontrol.c:2630
 charge_memcg+0x6d/0x120 mm/memcontrol.c:5024
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5110
 __swap_cache_prepare_and_add+0x69/0x4a0 mm/swap_state.c:476
 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:552
 swap_cluster_readahead+0x25f/0x3c0 mm/swap_state.c:726
 swapin_readahead+0xde/0x840 mm/swap_state.c:901
 do_swap_page+0x31e/0x2180 mm/memory.c:4891
 handle_pte_fault mm/memory.c:6430 [inline]
 __handle_mm_fault mm/memory.c:6565 [inline]
 handle_mm_fault+0xb30/0x2e70 mm/memory.c:6734
 do_user_addr_fault+0x62f/0x1050 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618

value changed: 0x0000000100013b57 -> 0x0000000100013b58

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 23834 Comm: syz.3.5503 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
==================================================================
syz.3.5503 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
CPU: 0 UID: 0 PID: 23834 Comm: syz.3.5503 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x1d/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120
 dump_stack+0x15/0x1b lib/dump_stack.c:129
 dump_header+0x80/0x240 mm/oom_kill.c:464
 oom_kill_process+0x295/0x350 mm/oom_kill.c:1031
 out_of_memory+0x97d/0xb80 mm/oom_kill.c:1169
 mem_cgroup_out_of_memory mm/memcontrol.c:1907 [inline]
 mem_cgroup_oom mm/memcontrol.c:1930 [inline]
 try_charge_memcg+0x62f/0xa10 mm/memcontrol.c:2672
 charge_memcg+0x6d/0x120 mm/memcontrol.c:5024
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5110
 __swap_cache_prepare_and_add+0x69/0x4a0 mm/swap_state.c:476
 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:552
 swap_cluster_readahead+0x25f/0x3c0 mm/swap_state.c:726
 swapin_readahead+0xde/0x840 mm/swap_state.c:901
 do_swap_page+0x31e/0x2180 mm/memory.c:4891
 handle_pte_fault mm/memory.c:6430 [inline]
 __handle_mm_fault mm/memory.c:6565 [inline]
 handle_mm_fault+0xb30/0x2e70 mm/memory.c:6734
 do_user_addr_fault+0x62f/0x1050 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f03b1e57fb8
Code: 75 40 a8 10 75 3c 41 51 4c 8d 9b 08 03 00 00 49 89 c9 48 89 f1 41 50 48 8b 74 24 20 49 89 d0 48 89 fa 4c 89 df e8 a8 56 00 00 <8b> 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00
RSP: 002b:00007ffc631026f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000055556db03500 RCX: 00007f03b1e5d68e
RDX: 00007ffc63102740 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f03b2117da0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000010e491
R13: 00007f03b211618c R14: 000000000010e26e R15: 00007ffc63102870
 </TASK>
memory: usage 307200kB, limit 307200kB, failcnt 10802
memory+swap: usage 313488kB, limit 9007199254740988kB, failcnt 0
kmem: usage 307044kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz3:
cache 4096
rss 0
shmem 4096
mapped_file 0
dirty 0
writeback 0
workingset_refault_anon 4968
workingset_refault_file 7530
swap 6430720
swapcached 88907776
pgpgin 1210752
pgpgout 1210749
pgfault 1119294
pgmajfault 2798
inactive_anon 0
active_anon 8192
inactive_file 0
active_file 0
unevictable 4096
hierarchical_memory_limit 314572800
hierarchical_memsw_limit 9223372036854771712
total_cache 4096
total_rss 0
total_shmem 4096
total_mapped_file 0
total_dirty 0
total_writeback 0
total_workingset_refault_anon 4968
total_workingset_refault_file 7530
total_swap 6430720
total_swapcached 88907776
total_pgpgin 1210752
total_pgpgout 1210749
total_pgfault 1119294
total_pgmajfault 2798
total_inactive_anon 0
total_active_anon 8192
total_inactive_file 0
total_active_file 0
total_unevictable 4096
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz3,task_memcg=/syz3,task=syz.3.1037,pid=7131,uid=0
Memory cgroup out of memory: Killed process 7131 (syz.3.1037) total-vm:96084kB, anon-rss:1232kB, file-rss:20804kB, shmem-rss:0kB, UID:0 pgtables:104kB oom_score_adj:1000
syz.3.5503 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
CPU: 0 UID: 0 PID: 23834 Comm: syz.3.5503 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x1d/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120
 dump_stack+0x15/0x1b lib/dump_stack.c:129
 dump_header+0x80/0x240 mm/oom_kill.c:464
 oom_kill_process+0x295/0x350 mm/oom_kill.c:1031
 out_of_memory+0x97d/0xb80 mm/oom_kill.c:1169
 mem_cgroup_out_of_memory mm/memcontrol.c:1907 [inline]
 mem_cgroup_oom mm/memcontrol.c:1930 [inline]
 try_charge_memcg+0x62f/0xa10 mm/memcontrol.c:2672
 charge_memcg+0x6d/0x120 mm/memcontrol.c:5024
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5110
 __swap_cache_prepare_and_add+0x69/0x4a0 mm/swap_state.c:476
 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:552
 swap_cluster_readahead+0x35c/0x3c0 mm/swap_state.c:745
 swapin_readahead+0xde/0x840 mm/swap_state.c:901
 do_swap_page+0x31e/0x2180 mm/memory.c:4891
 handle_pte_fault mm/memory.c:6430 [inline]
 __handle_mm_fault mm/memory.c:6565 [inline]
 handle_mm_fault+0xb30/0x2e70 mm/memory.c:6734
 do_user_addr_fault+0x62f/0x1050 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f03b1d6a80c
Code: 8a 31 13 00 eb 24 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 81 c3 f0 00 00 00 48 39 dd 74 24 <80> 7b 20 00 74 ee 8b 43 0c 85 c0 74 e7 48 89 df 48 81 c3 f0 00 00
RSP: 002b:00007ffc63102770 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00007f03b2116090 RCX: 000055556db03808
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f03b2117da0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000010e491
R13: 00007f03b211618c R14: 000000000010e26e R15: 00007ffc63102870
 </TASK>
memory: usage 301480kB, limit 307200kB, failcnt 11372
memory+swap: usage 313304kB, limit 9007199254740988kB, failcnt 0
kmem: usage 307196kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz3:
cache 4096
rss 0
shmem 4096
mapped_file 0
dirty 0
writeback 0
workingset_refault_anon 4972
workingset_refault_file 7530
swap 6250496
swapcached 88924160
pgpgin 1210756
pgpgout 1210755
pgfault 1119300
pgmajfault 2801
inactive_anon 0
active_anon 0
inactive_file 0
active_file 0
unevictable 4096
hierarchical_memory_limit 314572800
hierarchical_memsw_limit 9223372036854771712
total_cache 4096
total_rss 0
total_shmem 4096
total_mapped_file 0
total_dirty 0
total_writeback 0
total_workingset_refault_anon 4972
total_workingset_refault_file 7530
total_swap 6250496
total_swapcached 88924160
total_pgpgin 1210756
total_pgpgout 1210755
total_pgfault 1119300
total_pgmajfault 2801
total_inactive_anon 0
total_active_anon 0
total_inactive_file 0
total_active_file 0
total_unevictable 4096
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz3,task_memcg=/syz3,task=syz.3.720,pid=6049,uid=0
Memory cgroup out of memory: Killed process 6049 (syz.3.720) total-vm:96204kB, anon-rss:1232kB, file-rss:20804kB, shmem-rss:0kB, UID:0 pgtables:100kB oom_score_adj:1000