================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff860079c0 of 8 bytes by interrupt on cpu 1: 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:1689 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x210/0x7b0 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x2f/0x50 kernel/locking/spinlock.c:202 worker_thread+0x5f7/0x720 kernel/workqueue.c:3423 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffffffff860079c0 of 8 bytes by task 19030 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x100 mm/memcontrol.c:906 count_shadow_nodes+0x6b/0x230 mm/workingset.c:685 do_shrink_slab+0x5a/0x690 mm/shrinker.c:382 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0x4ed/0x860 mm/shrinker.c:626 shrink_node_memcgs mm/vmscan.c:5891 [inline] shrink_node+0xa0d/0x13c0 mm/vmscan.c:5924 shrink_zones mm/vmscan.c:6168 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6230 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6545 try_charge_memcg+0x27a/0xcd0 mm/memcontrol.c:2944 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7580 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bc/0x1840 mm/memory.c:4065 handle_pte_fault mm/memory.c:5384 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0x809/0x2a80 mm/memory.c:5689 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x0000000100002a73 -> 0x0000000100002a74 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 19030 Comm: syz.1.4420 Not tainted 6.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ================================================================== syz.1.4420 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 0 PID: 19030 Comm: syz.1.4420 Not tainted 6.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:114 dump_stack+0x15/0x20 lib/dump_stack.c:123 dump_header+0x83/0x2d0 mm/oom_kill.c:462 oom_kill_process+0x33e/0x4c0 mm/oom_kill.c:1035 out_of_memory+0x9af/0xbe0 mm/oom_kill.c:1173 mem_cgroup_out_of_memory+0x13e/0x190 mm/memcontrol.c:1975 mem_cgroup_oom mm/memcontrol.c:2203 [inline] try_charge_memcg+0x745/0xcd0 mm/memcontrol.c:2992 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7580 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bc/0x1840 mm/memory.c:4065 handle_pte_fault mm/memory.c:5384 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0x809/0x2a80 mm/memory.c:5689 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f47faf9f364 Code: 00 31 f6 e8 8e ec ff ff 48 81 c3 d8 00 00 00 48 39 dd 0f 84 54 fd ff ff 80 7b 20 00 48 89 df 74 e7 e8 80 c4 ff ff 84 c0 74 d7 <80> 3d 45 3e 28 00 00 48 8b 83 a8 00 00 00 75 be 8b 00 89 83 9c 00 RSP: 002b:00007fffe2e2dc30 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 00007f47fb258fa0 RCX: 00000000000635d8 RDX: 0000000000000001 RSI: 00007fffe2e2dc10 RDI: 00007f47fb258fa0 RBP: 00007f47fb25aaa0 R08: 000000002983b783 R09: 7fffffffffffffff R10: 00007f47fb22f0b8 R11: 00007f47fb22f080 R12: 000000000006388e R13: 0000000000000032 R14: 00007f47fb25aaa0 R15: 00007fffe2e2dd10 memory: usage 307200kB, limit 307200kB, failcnt 16189 memory+swap: usage 307444kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307200kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz1: cache 0 rss 0 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 8 workingset_refault_file 43 swap 249856 swapcached 0 pgpgin 255164 pgpgout 255164 pgfault 296844 pgmajfault 20 inactive_anon 0 active_anon 0 inactive_file 0 active_file 0 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 0 total_rss 0 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 8 total_workingset_refault_file 43 total_swap 249856 total_swapcached 0 total_pgpgin 255164 total_pgpgout 255164 total_pgfault 296844 total_pgmajfault 20 total_inactive_anon 0 total_active_anon 0 total_inactive_file 0 total_active_file 0 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz1,mems_allowed=0,oom_memcg=/syz1,task_memcg=/syz1,task=syz.1.4420,pid=19030,uid=0 Memory cgroup out of memory: Killed process 19030 (syz.1.4420) total-vm:90860kB, anon-rss:452kB, file-rss:9252kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000