================================================================== BUG: KCSAN: data-race in __run_timer_base / next_expiry_recalc write to 0xffff888237d1de98 of 8 bytes by interrupt on cpu 1: next_expiry_recalc+0x187/0x1e0 kernel/time/timer.c:1968 __run_timers kernel/time/timer.c:2415 [inline] __run_timer_base+0x2ee/0x640 kernel/time/timer.c:2429 run_timer_base kernel/time/timer.c:2438 [inline] run_timer_softirq+0x31/0x70 kernel/time/timer.c:2448 handle_softirqs+0xc8/0x290 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0x3e/0x90 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043 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:86 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 acpi_idle_do_entry+0x1d/0x30 drivers/acpi/processor_idle.c:573 acpi_idle_enter+0x96/0xb0 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0xcf/0x270 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x40/0x70 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x195/0x230 kernel/sched/idle.c:332 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430 start_secondary+0x94/0xa0 arch/x86/kernel/smpboot.c:313 common_startup_64+0x12c/0x137 read to 0xffff888237d1de98 of 8 bytes by interrupt on cpu 0: __run_timer_base+0x52/0x640 kernel/time/timer.c:2424 timer_expire_remote+0x2f/0x40 kernel/time/timer.c:2181 tmigr_handle_remote_cpu kernel/time/timer_migration.c:938 [inline] tmigr_handle_remote_up kernel/time/timer_migration.c:1030 [inline] __walk_groups kernel/time/timer_migration.c:488 [inline] tmigr_handle_remote+0x4ee/0x910 kernel/time/timer_migration.c:1091 run_timer_softirq+0x5f/0x70 kernel/time/timer.c:2452 handle_softirqs+0xc8/0x290 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0x3e/0x90 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 is_atomic kernel/kcsan/core.c:249 [inline] should_watch kernel/kcsan/core.c:277 [inline] check_access kernel/kcsan/core.c:752 [inline] __tsan_read4+0xe5/0x180 kernel/kcsan/core.c:1024 io_cqe_cache_refill io_uring/io_uring.c:824 [inline] io_get_cqe_overflow io_uring/io_uring.h:161 [inline] __io_cqring_overflow_flush+0x28e/0x470 io_uring/io_uring.c:693 io_cqring_do_overflow_flush io_uring/io_uring.c:717 [inline] io_cqring_wait io_uring/io_uring.c:2524 [inline] __do_sys_io_uring_enter io_uring/io_uring.c:3291 [inline] __se_sys_io_uring_enter+0x11c9/0x15a0 io_uring/io_uring.c:3183 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3183 x64_sys_call+0x263/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:427 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000010001bcad -> 0x000000010001bcae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10534 Comm: syz-executor.2 Tainted: G W 6.9.0-syzkaller-03117-gb850dc206a57 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ==================================================================