syzbot

==================================================================
BUG: KCSAN: data-race in hrtimer_reprogram / print_cpu

write to 0xffff888237d1db20 of 8 bytes by interrupt on cpu 1:
 __hrtimer_reprogram kernel/time/hrtimer.c:659 [inline]
 hrtimer_reprogram+0x1de/0x250 kernel/time/hrtimer.c:866
 hrtimer_update_softirq_timer kernel/time/hrtimer.c:1209 [inline]
 hrtimer_run_softirq+0x44c/0x480 kernel/time/hrtimer.c:1769
 __do_softirq+0xf2/0x2c7 kernel/softirq.c:571
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:934
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

read to 0xffff888237d1db20 of 8 bytes by task 18097 on cpu 0:
 print_cpu+0x31e/0x680 kernel/time/timer_list.c:133
 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x2c3/0x8e0 fs/seq_file.c:230
 proc_reg_read_iter+0xfa/0x170 fs/proc/inode.c:305
 call_read_iter include/linux/fs.h:2185 [inline]
 generic_file_splice_read+0xde/0x2b0 fs/splice.c:309
 do_splice_to fs/splice.c:793 [inline]
 splice_direct_to_actor+0x26c/0x620 fs/splice.c:865
 do_splice_direct+0xfb/0x180 fs/splice.c:974
 do_sendfile+0x3bf/0x910 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1309
 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

value changed: 0x000001ee8c941daa -> 0x000001ee8c5e51f2

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18097 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-12196-g1501278bb7ba-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
==================================================================