================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237d197d8 of 2 bytes by interrupt on cpu 1: hrtimer_interrupt+0x968/0xaf0 kernel/time/hrtimer.c:1844 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x6f/0x1c0 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x64/0x80 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 __tsan_read8+0x0/0x180 kernel/kcsan/core.c:634 PageAnon include/linux/page-flags.h:495 [inline] page_remove_rmap+0x54/0x230 mm/rmap.c:1350 zap_pte_range+0x6cd/0xe20 mm/memory.c:1362 zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0x2dc/0x3d0 mm/memory.c:1552 unmap_single_vma+0x157/0x210 mm/memory.c:1597 unmap_vmas+0xd0/0x180 mm/memory.c:1629 exit_mmap+0x23d/0x470 mm/mmap.c:3171 __mmput+0x27/0x1d0 kernel/fork.c:1115 mmput+0x3d/0x50 kernel/fork.c:1136 exit_mm+0x2ec/0x3e0 kernel/exit.c:501 do_exit+0x3ef/0x14a0 kernel/exit.c:812 do_group_exit+0xce/0x1a0 kernel/exit.c:922 get_signal+0xf93/0x15d0 kernel/signal.c:2868 arch_do_signal_or_restart+0x8c/0x280 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x109/0x190 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300 do_syscall_64+0x50/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237d197d8 of 2 bytes by task 314 on cpu 0: print_cpu+0x3a3/0x690 kernel/time/timer_list.c:136 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291 seq_read_iter+0x2e1/0x930 fs/seq_file.c:230 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: 0x189b -> 0x189c Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 314 Comm: syz-executor.2 Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================