================================================================== BUG: KCSAN: data-race in snd_seq_check_queue / snd_seq_control_queue write to 0xffff88810785f5a4 of 1 bytes by interrupt on cpu 0: snd_seq_check_queue+0x251/0x290 sound/core/seq/seq_queue.c:283 snd_seq_timer_interrupt+0x228/0x240 sound/core/seq/seq_timer.c:158 snd_timer_process_callbacks sound/core/timer.c:796 [inline] snd_timer_interrupt+0xa7c/0xb50 sound/core/timer.c:919 snd_hrtimer_callback+0x13a/0x220 sound/core/hrtimer.c:50 __run_hrtimer+0x163/0x460 kernel/time/hrtimer.c:1524 __hrtimer_run_queues kernel/time/hrtimer.c:1588 [inline] hrtimer_interrupt+0x37c/0xa40 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xa3/0x240 arch/x86/kernel/apic/apic.c:1097 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0x80/0xd0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:150 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] acpi_idle_do_entry+0x94/0x120 drivers/acpi/processor_idle.c:517 acpi_idle_enter+0x22e/0x260 drivers/acpi/processor_idle.c:648 cpuidle_enter_state+0x2a5/0x7e0 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:132 [inline] cpuidle_idle_call kernel/sched/idle.c:213 [inline] do_idle+0x1e7/0x2c0 kernel/sched/idle.c:273 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:369 rest_init+0xd8/0xe0 init/main.c:709 arch_call_rest_init+0xa/0xb start_kernel+0x608/0x6d0 init/main.c:1049 secondary_startup_64_no_verify+0xa6/0xab read to 0xffff88810785f5a4 of 1 bytes by task 15023 on cpu 1: queue_access_unlock sound/core/seq/seq_queue.c:370 [inline] snd_seq_control_queue+0x4f2/0x550 sound/core/seq/seq_queue.c:734 event_input_timer+0x1e/0x30 sound/core/seq/seq_system.c:103 snd_seq_deliver_single_event+0x31b/0x4f0 sound/core/seq/seq_clientmgr.c:638 snd_seq_deliver_event+0x192/0x4a0 sound/core/seq/seq_clientmgr.c:839 snd_seq_dispatch_event+0x14c/0x270 sound/core/seq/seq_clientmgr.c:913 snd_seq_check_queue+0xfe/0x290 sound/core/seq/seq_queue.c:264 snd_seq_enqueue_event+0x275/0x2b0 sound/core/seq/seq_queue.c:333 snd_seq_client_enqueue_event+0x206/0x2a0 sound/core/seq/seq_clientmgr.c:974 snd_seq_write+0x435/0x550 sound/core/seq/seq_clientmgr.c:1093 vfs_write+0x1d7/0x6d0 fs/read_write.c:584 ksys_write+0xce/0x180 fs/read_write.c:639 __do_sys_write fs/read_write.c:651 [inline] __se_sys_write fs/read_write.c:648 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:648 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15023 Comm: syz-executor.1 Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================