================================================================== 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 ==================================================================