================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats / tick_do_update_jiffies64 read-write to 0xffffffff85a079c0 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:211 [inline] tick_nohz_highres_handler+0x7b/0x2c0 kernel/time/tick-sched.c:1509 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x52/0x190 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 __tsan_unaligned_volatile_read4+0x0/0x190 kernel/kcsan/core.c:753 __rcu_read_unlock+0x4d/0x70 kernel/rcu/tree_plugin.h:425 rcu_read_unlock include/linux/rcupdate.h:779 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x376/0xac0 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700 worker_thread+0x525/0x730 kernel/workqueue.c:2781 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 read to 0xffffffff85a079c0 of 8 bytes by task 5159 on cpu 0: do_flush_stats mm/memcontrol.c:656 [inline] mem_cgroup_flush_stats+0x5d/0xd0 mm/memcontrol.c:667 prepare_scan_control mm/vmscan.c:2225 [inline] shrink_node+0x304/0x15c0 mm/vmscan.c:5875 shrink_zones mm/vmscan.c:6116 [inline] do_try_to_free_pages+0x43d/0xce0 mm/vmscan.c:6178 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:6493 try_charge_memcg+0x280/0xd30 mm/memcontrol.c:2742 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7210 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7295 __read_swap_cache_async+0x2f6/0x550 mm/swap_state.c:490 swap_cluster_readahead+0x452/0x4c0 mm/swap_state.c:674 swapin_readahead+0xe9/0x7f0 mm/swap_state.c:878 do_swap_page+0x4a0/0x1670 mm/memory.c:3884 handle_pte_fault mm/memory.c:5042 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5345 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3ff/0x6c0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x000000010004f9a3 -> 0x000000010004f9a4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 5159 Comm: syz-executor.5 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ================================================================== syz-executor.5 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 0 PID: 5159 Comm: syz-executor.5 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xda/0x130 lib/dump_stack.c:106 dump_stack+0x15/0x20 lib/dump_stack.c:113 dump_header+0x82/0x2d0 mm/oom_kill.c:460 oom_kill_process+0x33a/0x4c0 mm/oom_kill.c:1031 out_of_memory+0x9ca/0xbf0 mm/oom_kill.c:1169 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1791 mem_cgroup_oom mm/memcontrol.c:2021 [inline] try_charge_memcg+0x75c/0xd30 mm/memcontrol.c:2790 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7210 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7295 __read_swap_cache_async+0x2f6/0x550 mm/swap_state.c:490 swap_cluster_readahead+0x452/0x4c0 mm/swap_state.c:674 swapin_readahead+0xe9/0x7f0 mm/swap_state.c:878 do_swap_page+0x4a0/0x1670 mm/memory.c:3884 handle_pte_fault mm/memory.c:5042 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5345 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3ff/0x6c0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fb1e33694e7 Code: 08 85 c9 0f 85 6c 0b 00 00 4c 89 4c 24 60 31 c0 b9 40 42 0f 00 ba 81 00 00 00 bf ca 00 00 00 c7 06 01 00 00 00 e8 e9 67 04 00 <83> 05 9a 74 16 00 01 4c 8b 4c 24 60 80 bc 24 28 01 00 00 00 0f b6 RSP: 002b:00007ffeccbf08c0 EFLAGS: 00010207 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007fb1e33afce9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb1e34cef88 RBP: 0000000000000048 R08: 00007fb1e34cef8c R09: 00007fb1e34cef8c R10: 00007fb1e2f330c0 R11: 0000000000000246 R12: 00007fb1e34cef80 R13: 0000000000000f69 R14: 0000000000000000 R15: 00007fb1e34cef80 memory: usage 307176kB, limit 307200kB, failcnt 200069 memory+swap: usage 309768kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307132kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache 12288 rss 28672 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 105125 workingset_refault_file 36 swap 2654208 swapcached 24576 pgpgin 874362 pgpgout 874352 pgfault 1330121 pgmajfault 71248 inactive_anon 28672 active_anon 0 inactive_file 0 active_file 12288 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 12288 total_rss 28672 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 105125 total_workingset_refault_file 36 total_swap 2654208 total_swapcached 24576 total_pgpgin 874362 total_pgpgout 874352 total_pgfault 1330121 total_pgmajfault 71248 total_inactive_anon 28672 total_active_anon 0 total_inactive_file 0 total_active_file 12288 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz5,mems_allowed=0,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=5159,uid=0 Memory cgroup out of memory: Killed process 5159 (syz-executor.5) total-vm:46304kB, anon-rss:376kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000