================================================================== BUG: KCSAN: data-race in queue_access_lock / snd_seq_check_queue write to 0xffff88810073df64 of 1 bytes by interrupt on cpu 0: queue_access_lock+0x89/0xc0 sound/core/seq/seq_queue.c:356 snd_seq_control_queue+0x77/0x350 sound/core/seq/seq_queue.c:719 event_input_timer+0x2f/0x50 sound/core/seq/seq_system.c:103 snd_seq_deliver_single_event.constprop.0+0x3e8/0x4d0 sound/core/seq/seq_clientmgr.c:638 snd_seq_deliver_event+0x2e9/0x4c0 sound/core/seq/seq_clientmgr.c:839 snd_seq_dispatch_event+0xa1/0x340 sound/core/seq/seq_clientmgr.c:913 snd_seq_check_queue+0xeb/0x200 sound/core/seq/seq_queue.c:262 snd_seq_timer_interrupt+0x243/0x280 sound/core/seq/seq_timer.c:158 snd_timer_process_callbacks+0x1e4/0x220 sound/core/timer.c:747 snd_timer_interrupt sound/core/timer.c:870 [inline] snd_timer_interrupt+0x483/0x930 sound/core/timer.c:791 snd_hrtimer_callback+0x18f/0x260 sound/core/hrtimer.c:50 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 write to 0xffff88810073df64 of 1 bytes by task 9757 on cpu 1: snd_seq_check_queue+0xfb/0x200 sound/core/seq/seq_queue.c:248 snd_seq_enqueue_event+0x163/0x2b0 sound/core/seq/seq_queue.c:330 snd_seq_client_enqueue_event.constprop.0+0x187/0x2a0 sound/core/seq/seq_clientmgr.c:974 snd_seq_write+0x23f/0x4d0 sound/core/seq/seq_clientmgr.c:1093 __vfs_write+0x67/0xc0 fs/read_write.c:494 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0x17b/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 9757 Comm: syz-executor.3 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================