==================================================================
BUG: KCSAN: data-race in __run_hrtimer kernel/time/hrtimer.c:1360 [inline] and hrtimer_active+0x84/0x1a0
BUG: KCSAN: data-race in __hrtimer_run_queues+0x1f2/0x600 kernel/time/hrtimer.c:1451 and hrtimer_active+0x84/0x1a0

read to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 1:
 hrtimer_active+0x84/0x1a0 kernel/time/hrtimer.c:1321
 entity_tick kernel/sched/fair.c:4301 [inline]
 task_tick_fair+0x4c/0x920 kernel/sched/fair.c:9977
 scheduler_tick+0x5c/0xe0 kernel/sched/core.c:3471
 update_process_times+0x5f/0x80 kernel/time/timer.c:1644
 tick_sched_handle+0x75/0x100 kernel/time/tick-sched.c:167
 tick_sched_timer+0x58/0xe0 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 find_watchpoint kernel/kcsan/core.c:93 [inline]
 __kcsan_check_watchpoint+0xed/0x180 kernel/kcsan/core.c:322
 __tsan_read4+0x15/0x30 kernel/kcsan/kcsan.c:30
 ext4_do_update_inode fs/ext4/inode.c:5262 [inline]
 ext4_mark_iloc_dirty+0x1eb/0x1530 fs/ext4/inode.c:5897
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:6076

write to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 0:
 __run_hrtimer kernel/time/hrtimer.c:1360 [inline]
 __hrtimer_run_queues+0x1f2/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 elv_merge+0x0/0x220 block/elevator.c:239
 dd_bio_merge+0x96/0xf0 block/mq-deadline.c:481
 __blk_mq_sched_bio_merge+0xf9/0x250 block/blk-mq-sched.c:334
 blk_mq_sched_bio_merge block/blk-mq-sched.h:41 [inline]
 blk_mq_make_request+0x1f1/0xf40 block/blk-mq.c:1952
 generic_make_request block/blk-core.c:1052 [inline]
 generic_make_request+0x196/0x740 block/blk-core.c:994
 submit_bio+0x92/0x310 block/blk-core.c:1163
 dio_bio_submit fs/direct-io.c:482 [inline]
 do_blockdev_direct_IO+0x2a97/0x4cc0 fs/direct-io.c:1354
 __blockdev_direct_IO+0x86/0xa0 fs/direct-io.c:1413
 ext4_direct_IO_write fs/ext4/inode.c:3788 [inline]
 ext4_direct_IO+0x6f5/0xf70 fs/ext4/inode.c:3915

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7557 Comm: syz-executor.2 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================