================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice write to 0xffff888237d1af18 of 8 bytes by interrupt on cpu 1: hrtimer_interrupt+0xb3/0xac0 kernel/time/hrtimer.c:1790 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0xa3/0x240 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 get_current arch/x86/include/asm/current.h:15 [inline] write_comp_data kernel/kcov.c:220 [inline] __sanitizer_cov_trace_const_cmp4+0xd/0xa0 kernel/kcov.c:287 zap_pte_range+0x60b/0x10e0 mm/memory.c:1352 zap_pmd_range mm/memory.c:1467 [inline] zap_pud_range mm/memory.c:1496 [inline] zap_p4d_range mm/memory.c:1517 [inline] unmap_page_range+0x2dc/0x3d0 mm/memory.c:1538 unmap_single_vma+0x157/0x210 mm/memory.c:1583 unmap_vmas+0xd0/0x180 mm/memory.c:1615 exit_mmap+0x23d/0x470 mm/mmap.c:3170 __mmput+0x27/0x1b0 kernel/fork.c:1113 mmput+0x3d/0x50 kernel/fork.c:1134 exit_mm+0xdb/0x170 kernel/exit.c:507 do_exit+0x608/0x17a0 kernel/exit.c:819 do_group_exit+0xce/0x180 kernel/exit.c:929 get_signal+0xfc3/0x1550 kernel/signal.c:2830 arch_do_signal_or_restart+0x8c/0x2e0 arch/x86/kernel/signal.c:868 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+0x113/0x190 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+0x50/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237d1af18 of 8 bytes by task 19499 on cpu 0: print_tickdevice+0x158/0x370 kernel/time/timer_list.c:204 timer_list_show+0x74/0x180 kernel/time/timer_list.c:296 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:2156 [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+0x675/0xc40 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000007ecc6912d3 -> 0x0000007ecc69d623 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 19499 Comm: syz-executor.4 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================