================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237c197e0 of 8 bytes by interrupt on cpu 0: hrtimer_interrupt+0x1fb/0xaf0 kernel/time/hrtimer.c:1803 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 arch/x86/include/asm/idtentry.h:638 mm_update_next_owner+0x21b/0x4f0 kernel/exit.c:390 exit_mm+0x2ef/0x3f0 kernel/exit.c:500 do_exit+0x3ef/0x14a0 kernel/exit.c:812 do_group_exit+0xce/0x1a0 kernel/exit.c:922 get_signal+0xfa3/0x15e0 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a/0x220 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:209 __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+0x49/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237c197e0 of 8 bytes by task 31984 on cpu 1: print_cpu+0x32e/0x690 kernel/time/timer_list.c:133 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291 seq_read_iter+0x60b/0x930 fs/seq_file.c:272 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2157 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x651/0x730 fs/read_write.c:485 ksys_pread64 fs/read_write.c:675 [inline] __do_sys_pread64 fs/read_write.c:685 [inline] __se_sys_pread64 fs/read_write.c:682 [inline] __x64_sys_pread64+0xf5/0x150 fs/read_write.c:682 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x000002d5b9217550 -> 0x000002d5b9a238a0 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 31984 Comm: syz-executor.2 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================