================================================================== BUG: KCSAN: data-race in flush_memcg_stats_dwork / tick_do_update_jiffies64 read-write to 0xffffffff85c079c0 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: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:1095 [inline] __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 ext4_es_unregister_shrinker+0x0/0x50 include/trace/events/ext4.h:2328 __ext4_fill_super fs/ext4/super.c:5463 [inline] ext4_fill_super+0x3af7/0x5000 fs/ext4/super.c:5517 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1323 ext4_get_tree+0x18/0x20 fs/ext4/super.c:5547 vfs_get_tree+0x49/0x190 fs/super.c:1530 do_new_mount+0x200/0x650 fs/namespace.c:3040 path_mount+0x4ad/0xbb0 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568 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 56 on cpu 0: __mem_cgroup_flush_stats mm/memcontrol.c:648 [inline] flush_memcg_stats_dwork+0x55/0x110 mm/memcontrol.c:668 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 value changed: 0x0000000100000309 -> 0x000000010000030a Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 56 Comm: kworker/u4:3 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events_unbound flush_memcg_stats_dwork ==================================================================