================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice write to 0xffff888237c1c218 of 8 bytes by interrupt on cpu 0: hrtimer_interrupt+0x80/0x7b0 kernel/time/hrtimer.c:1796 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1043 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 acpi_idle_do_entry+0x1d/0x30 drivers/acpi/processor_idle.c:568 acpi_idle_enter+0x96/0xb0 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0xc5/0x260 drivers/cpuidle/cpuidle.c:264 cpuidle_enter+0x40/0x70 drivers/cpuidle/cpuidle.c:385 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x195/0x230 kernel/sched/idle.c:326 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:424 rest_init+0xef/0xf0 init/main.c:747 start_kernel+0x586/0x5e0 init/main.c:1105 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9a/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x12c/0x137 read to 0xffff888237c1c218 of 8 bytes by task 4355 on cpu 1: print_tickdevice+0x144/0x340 kernel/time/timer_list.c:208 timer_list_show+0x79/0x180 kernel/time/timer_list.c:300 seq_read_iter+0x2d1/0x930 fs/seq_file.c:230 proc_reg_read_iter+0x118/0x190 fs/proc/inode.c:299 copy_splice_read+0x3a0/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] splice_direct_to_actor+0x269/0x670 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x39b/0x970 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64 fs/read_write.c:1441 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1441 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000b978d2d98 -> 0x7fffffffffffffff Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 4355 Comm: syz.2.358 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================