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BUG: KCSAN: data-race in clockevents_program_event / print_tickdevice

write to 0xffff888237d16f18 of 8 bytes by task 3925 on cpu 1:
 clockevents_program_event+0x35/0x1e0 kernel/time/clockevents.c:313
 tick_program_event+0x78/0xc0 kernel/time/tick-oneshot.c:44
 __hrtimer_reprogram kernel/time/hrtimer.c:681 [inline]
 hrtimer_reprogram+0x1fb/0x240 kernel/time/hrtimer.c:866
 hrtimer_start_range_ns+0xf8/0x140 kernel/time/hrtimer.c:1299
 hrtimer_start include/linux/hrtimer.h:418 [inline]
 perf_swevent_start_hrtimer kernel/events/core.c:10594 [inline]
 cpu_clock_event_start kernel/events/core.c:10652 [inline]
 cpu_clock_event_add+0x115/0x130 kernel/events/core.c:10664
 event_sched_in+0x79a/0xe10 kernel/events/core.c:2559
 group_sched_in kernel/events/core.c:2595 [inline]
 merge_sched_in kernel/events/core.c:3746 [inline]
 visit_groups_merge+0x933/0x1aa0 kernel/events/core.c:3696
 ctx_flexible_sched_in kernel/events/core.c:3788 [inline]
 ctx_sched_in+0x1db/0x200 kernel/events/core.c:3833
 perf_event_sched_in kernel/events/core.c:2699 [inline]
 perf_event_context_sched_in kernel/events/core.c:3884 [inline]
 __perf_event_task_sched_in+0x2f9/0x850 kernel/events/core.c:3927
 perf_event_task_sched_in include/linux/perf_event.h:1208 [inline]
 finish_task_switch+0x1fd/0x290 kernel/sched/core.c:4809
 context_switch kernel/sched/core.c:4943 [inline]
 __schedule+0x435/0x680 kernel/sched/core.c:6287
 schedule+0x67/0x90 kernel/sched/core.c:6366
 jbd2_log_wait_commit+0x125/0x210 fs/jbd2/journal.c:712
 jbd2_complete_transaction+0x101/0x110 fs/jbd2/journal.c:846
 ext4_fc_commit+0x24e/0x14c0 fs/ext4/fast_commit.c:1215
 ext4_fsync_journal fs/ext4/fsync.c:115 [inline]
 ext4_sync_file+0x336/0x670 fs/ext4/fsync.c:174
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2955 [inline]
 ext4_buffered_write_iter+0x3af/0x400 fs/ext4/file.c:277
 ext4_file_write_iter+0x2e7/0x11f0
 call_write_iter include/linux/fs.h:2163 [inline]
 do_iter_readv_writev+0x2de/0x380 fs/read_write.c:729
 do_iter_write+0x192/0x5c0 fs/read_write.c:855
 vfs_iter_write+0x4c/0x70 fs/read_write.c:896
 iter_file_splice_write+0x43a/0x790 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237d16f18 of 8 bytes by task 3927 on cpu 0:
 print_tickdevice+0x158/0x370 kernel/time/timer_list.c:204
 timer_list_show+0x74/0x180 kernel/time/timer_list.c:296
 seq_read_iter+0x60b/0x930 fs/seq_file.c:272
 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2157 [inline]
 generic_file_splice_read+0x24f/0x330 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000001b6e07576f6 -> 0x000001b6e070e6ee

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3927 Comm: syz-executor.4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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