================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats / tick_do_update_jiffies64 read-write to 0xffffffff85a079c0 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:199 [inline] tick_sched_timer+0x76/0x2b0 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0x73/0x210 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:696 folio_test_anon include/linux/page-flags.h:657 [inline] PageAnon include/linux/page-flags.h:662 [inline] mm_counter include/linux/mm.h:2365 [inline] zap_pte_range mm/memory.c:1410 [inline] zap_pmd_range mm/memory.c:1536 [inline] zap_pud_range mm/memory.c:1565 [inline] zap_p4d_range mm/memory.c:1586 [inline] unmap_page_range+0xd31/0x1e60 mm/memory.c:1607 unmap_single_vma+0x13c/0x1c0 mm/memory.c:1653 unmap_vmas+0x157/0x200 mm/memory.c:1692 exit_mmap+0x158/0x5a0 mm/mmap.c:3031 __mmput+0x28/0x1c0 kernel/fork.c:1207 mmput+0x49/0x60 kernel/fork.c:1229 exit_mm+0xe1/0x180 kernel/exit.c:563 do_exit+0x558/0x1660 kernel/exit.c:856 do_group_exit+0x101/0x150 kernel/exit.c:1019 get_signal+0xeb1/0xff0 kernel/signal.c:2859 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff85a079c0 of 8 bytes by task 3953 on cpu 1: __mem_cgroup_flush_stats mm/memcontrol.c:644 [inline] mem_cgroup_flush_stats+0x83/0x120 mm/memcontrol.c:653 prepare_scan_count mm/vmscan.c:2848 [inline] shrink_node+0x321/0x14f0 mm/vmscan.c:6471 shrink_zones mm/vmscan.c:6711 [inline] do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6773 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:7088 try_charge_memcg+0x27d/0xd20 mm/memcontrol.c:2695 try_charge mm/memcontrol.c:2837 [inline] charge_memcg+0x51/0x200 mm/memcontrol.c:6960 __mem_cgroup_charge+0x29/0xa0 mm/memcontrol.c:6981 mem_cgroup_charge include/linux/memcontrol.h:678 [inline] do_anonymous_page mm/memory.c:4070 [inline] handle_pte_fault mm/memory.c:4921 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0xcea/0x21d0 mm/memory.c:5211 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x45f/0x640 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x000000010003fcb5 -> 0x000000010003fcb6 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3953 Comm: syz-executor.5 Tainted: G W 6.3.0-rc6-syzkaller-00035-g0bcc40255504 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 ================================================================== syz-executor.5 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 1 PID: 3953 Comm: syz-executor.5 Tainted: G W 6.3.0-rc6-syzkaller-00035-g0bcc40255504 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 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+0x95/0x3c0 mm/oom_kill.c:460 oom_kill_process+0xe3/0x3e0 mm/oom_kill.c:1036 out_of_memory+0x9f0/0xc30 mm/oom_kill.c:1174 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1720 mem_cgroup_oom mm/memcontrol.c:1950 [inline] try_charge_memcg+0x759/0xd20 mm/memcontrol.c:2743 try_charge mm/memcontrol.c:2837 [inline] charge_memcg+0x51/0x200 mm/memcontrol.c:6960 __mem_cgroup_charge+0x29/0xa0 mm/memcontrol.c:6981 mem_cgroup_charge include/linux/memcontrol.h:678 [inline] do_anonymous_page mm/memory.c:4070 [inline] handle_pte_fault mm/memory.c:4921 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0xcea/0x21d0 mm/memory.c:5211 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x45f/0x640 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f931e3fdeda Code: 30 48 8b 34 24 48 85 f6 74 17 8b 44 24 18 0f c8 89 c0 48 89 44 24 18 48 83 fe 01 0f 85 a1 01 00 00 48 8b 44 24 10 8b 74 24 18 <89> 30 e9 d2 fc ff ff 48 8b 44 24 10 8b 10 48 8b 04 24 48 85 c0 0f RSP: 002b:00007ffcc9daf980 EFLAGS: 00010246 RAX: 000000002000c000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: a56c30e3f8fa23c6 RSI: 0000000000000002 RDI: 00005555568392e8 RBP: 00007ffcc9dafa78 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f931e007570 R11: 0000000020008924 R12: 00000000002c7301 R13: 00007ffcc9dafaa0 R14: 00007f931e57df80 R15: 0000000000000032 memory: usage 307200kB, limit 307200kB, failcnt 4637 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: anon 167936 file 8130560 kernel 306274304 kernel_stack 32768 pagetables 81920 sec_pagetables 0 percpu 10233568 sock 0 vmalloc 0 shmem 8130560 file_mapped 208896 file_dirty 0 file_writeback 0 swapcached 0 inactive_anon 4079616 active_anon 4198400 inactive_file 0 active_file 0 unevictable 0 slab_reclaimable 30208 slab_unreclaimable 295853400 slab 295883608 workingset_refault_anon 0 workingset_refault_file 110 workingset_activate_anon 0 workingset_activate_file 1 workingset_restore_anon 0 workingset_restore_file 1 workingset_nodereclaim 0 pgscan 1423 pgsteal 194 pgscan_kswapd 0 pgscan_direct 1423 pgscan_khugepaged 0 pgsteal_kswapd 0 pgsteal_direct 194 pgsteal_khugepaged 0 pgfault 2092815 pgmajfault 10 pgrefill 1459 pgactivate 126985 pgdeactivate 1863 pglazyfree 0 pglazyfreed 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz5,mems_allowed=0,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=3953,uid=0 Memory cgroup out of memory: Killed process 3953 (syz-executor.5) total-vm:46352kB, anon-rss:376kB, file-rss:8832kB, shmem-rss:256kB, UID:0 pgtables:84kB oom_score_adj:1000