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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

read-write to 0xffff88813bc1de94 of 4 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x7b/0xa10 kernel/time/hrtimer.c:1623
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x6f/0x200 arch/x86/kernel/apic/apic.c:1102
 asm_call_irq_on_stack+0xf/0x20
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
 __tlb_remove_page_size+0x60/0x160 mm/mmu_gather.c:82
 __tlb_remove_page include/asm-generic/tlb.h:438 [inline]
 zap_pte_range+0x65f/0x13c0 mm/memory.c:1267
 zap_pmd_range mm/memory.c:1368 [inline]
 zap_pud_range mm/memory.c:1397 [inline]
 zap_p4d_range mm/memory.c:1418 [inline]
 unmap_page_range+0x560/0x660 mm/memory.c:1439
 unmap_single_vma+0x157/0x210 mm/memory.c:1484
 unmap_vmas+0xbf/0x150 mm/memory.c:1516
 exit_mmap+0x1c7/0x400 mm/mmap.c:3220
 __mmput+0xa2/0x220 kernel/fork.c:1083
 mmput+0x38/0x40 kernel/fork.c:1104
 exit_mm+0x32f/0x420 kernel/exit.c:501
 do_exit+0x41f/0x1690 kernel/exit.c:812
 do_group_exit+0xc8/0x170 kernel/exit.c:922
 get_signal+0xd5e/0x1440 kernel/signal.c:2770
 arch_do_signal_or_restart+0x2a/0x270 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x109/0x1a0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:302
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88813bc1de94 of 4 bytes by task 31350 on cpu 1:
 print_cpu+0x37f/0x690 kernel/time/timer_list.c:135
 timer_list_show+0x114/0x180 kernel/time/timer_list.c:283
 seq_read_iter+0x2d8/0x8e0 fs/seq_file.c:227
 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:310
 call_read_iter include/linux/fs.h:1895 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x552/0x5c0 fs/read_write.c:496
 ksys_read+0xce/0x180 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:642
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31350 Comm: syz-executor.5 Not tainted 5.11.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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