================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats / tick_do_update_jiffies64 read-write to 0xffffffff85c079c0 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+0x7e/0x2d0 kernel/time/tick-sched.c:1473 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline] hrtimer_interrupt+0x36e/0xa70 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 __sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:203 filemap_get_folios+0x2e/0x3c0 mm/filemap.c:2146 clean_bdev_aliases+0xd3/0x3a0 fs/buffer.c:1601 clean_bdev_bh_alias include/linux/buffer_head.h:215 [inline] __block_write_begin_int+0x4e8/0xc50 fs/buffer.c:1999 __block_write_begin+0x55/0x100 fs/buffer.c:2041 ext4_da_write_begin+0x309/0x5f0 fs/ext4/inode.c:3006 generic_perform_write+0x1d4/0x3f0 mm/filemap.c:3753 ext4_buffered_write_iter+0x235/0x3e0 fs/ext4/file.c:285 ext4_file_write_iter+0x2c7/0x1170 call_write_iter include/linux/fs.h:2191 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x468/0x760 fs/read_write.c:584 ksys_write+0xe8/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff85c079c0 of 8 bytes by task 1652 on cpu 1: __mem_cgroup_flush_stats mm/memcontrol.c:634 [inline] mem_cgroup_flush_stats+0x7f/0x110 mm/memcontrol.c:643 prepare_scan_count+0xad/0x7f0 mm/vmscan.c:2787 shrink_node+0x1cc/0x930 mm/vmscan.c:6103 shrink_zones+0x2c1/0x5d0 mm/vmscan.c:6343 do_try_to_free_pages+0x195/0x760 mm/vmscan.c:6405 try_to_free_mem_cgroup_pages+0x1d1/0x420 mm/vmscan.c:6720 reclaim_high+0xcd/0x110 mm/memcontrol.c:2389 mem_cgroup_handle_over_high+0x75/0x120 mm/memcontrol.c:2574 try_charge_memcg+0x886/0x9c0 mm/memcontrol.c:2812 try_charge mm/memcontrol.c:2823 [inline] charge_memcg+0x54/0x250 mm/memcontrol.c:6879 __mem_cgroup_charge+0x25/0xa0 mm/memcontrol.c:6900 mem_cgroup_charge include/linux/memcontrol.h:667 [inline] wp_page_copy+0x209/0x1460 mm/memory.c:3141 do_wp_page+0x2dd/0x780 handle_pte_fault mm/memory.c:4973 [inline] __handle_mm_fault mm/memory.c:5097 [inline] handle_mm_fault+0x5ef/0xa80 mm/memory.c:5218 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 __put_user_nocheck_4+0x3/0x11 schedule_tail+0x46/0x60 kernel/sched/core.c:5130 ret_from_fork+0x8/0x30 arch/x86/entry/entry_64.S:291 value changed: 0x0000000100031725 -> 0x0000000100031726 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1652 Comm: syz-executor.1 Not tainted 6.1.0-rc4-syzkaller-00372-gaf7a05689189-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================