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BUG: KCSAN: data-race in hrtimer_reprogram / print_cpu

write to 0xffff888237c1ed60 of 8 bytes by task 8680 on cpu 0:
 __hrtimer_reprogram kernel/time/hrtimer.c:659 [inline]
 hrtimer_reprogram+0x1bd/0x230 kernel/time/hrtimer.c:866
 hrtimer_start_range_ns+0x4e8/0x660 kernel/time/hrtimer.c:1299
 hrtimer_start include/linux/hrtimer.h:418 [inline]
 perf_swevent_start_hrtimer kernel/events/core.c:11013 [inline]
 cpu_clock_event_start kernel/events/core.c:11071 [inline]
 cpu_clock_event_add+0x10e/0x130 kernel/events/core.c:11083
 event_sched_in+0x451/0x670 kernel/events/core.c:2514
 group_sched_in kernel/events/core.c:2546 [inline]
 merge_sched_in kernel/events/core.c:3799 [inline]
 visit_groups_merge+0xbe0/0x1b90 kernel/events/core.c:3744
 ctx_flexible_sched_in+0xa0/0xf0 kernel/events/core.c:3852
 ctx_sched_in+0x1b0/0x1c0 kernel/events/core.c:3905
 perf_event_sched_in kernel/events/core.c:2642 [inline]
 perf_event_context_sched_in kernel/events/core.c:3951 [inline]
 __perf_event_task_sched_in+0x470/0x790 kernel/events/core.c:3980
 perf_event_task_sched_in include/linux/perf_event.h:1431 [inline]
 finish_task_switch+0x1ea/0x280 kernel/sched/core.c:5210
 context_switch kernel/sched/core.c:5346 [inline]
 __schedule+0x633/0x8b0 kernel/sched/core.c:6669
 preempt_schedule_common kernel/sched/core.c:6838 [inline]
 __cond_resched+0x28/0x50 kernel/sched/core.c:8516
 might_resched include/linux/kernel.h:111 [inline]
 mutex_lock+0xd/0x30 kernel/locking/mutex.c:283
 process_output_block drivers/tty/n_tty.c:540 [inline]
 n_tty_write+0x423/0xa80 drivers/tty/n_tty.c:2349
 do_tty_write drivers/tty/tty_io.c:1018 [inline]
 file_tty_write+0x3a0/0x600 drivers/tty/tty_io.c:1089
 tty_write+0x28/0x30 drivers/tty/tty_io.c:1110
 do_iter_write+0x4ae/0x770 fs/read_write.c:860
 vfs_iter_write+0x50/0x70 fs/read_write.c:901
 iter_file_splice_write+0x456/0x7d0 fs/splice.c:795
 do_splice_from fs/splice.c:873 [inline]
 direct_splice_actor+0x84/0xa0 fs/splice.c:1039
 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:994
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c1ed60 of 8 bytes by task 8701 on cpu 1:
 print_cpu+0x2fb/0x640 kernel/time/timer_list.c:133
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x612/0x8f0 fs/seq_file.c:272
 proc_reg_read_iter+0x10e/0x180 fs/proc/inode.c:305
 call_read_iter include/linux/fs.h:1862 [inline]
 generic_file_splice_read+0xe3/0x290 fs/splice.c:419
 do_splice_to fs/splice.c:902 [inline]
 splice_direct_to_actor+0x25a/0x5f0 fs/splice.c:973
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000061eb9e46b8 -> 0x00000061eb9b70a2

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8701 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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