================================================================== BUG: KCSAN: data-race in snd_seq_oss_readq_put_timestamp / snd_seq_oss_readq_put_timestamp write to 0xffff88809efb8d20 of 8 bytes by task 3257 on cpu 0: snd_seq_oss_readq_put_timestamp+0x2a0/0x2c0 sound/core/seq/oss/seq_oss_readq.c:233 send_midi_event sound/core/seq/oss/seq_oss_midi.c:600 [inline] snd_seq_oss_midi_input+0x29f/0x500 sound/core/seq/oss/seq_oss_midi.c:524 snd_seq_oss_event_input+0xbc/0x100 sound/core/seq/oss/seq_oss_event.c:429 snd_seq_deliver_single_event+0x31b/0x4f0 sound/core/seq/seq_clientmgr.c:638 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:693 [inline] snd_seq_deliver_event+0x392/0x4a0 sound/core/seq/seq_clientmgr.c:828 snd_seq_kernel_client_dispatch+0x16f/0x190 sound/core/seq/seq_clientmgr.c:2323 snd_vmidi_output_work+0x16d/0x200 sound/core/seq/seq_virmidi.c:150 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff88809efb8d20 of 8 bytes by task 3258 on cpu 1: snd_seq_oss_readq_put_timestamp+0x28/0x2c0 sound/core/seq/oss/seq_oss_readq.c:218 send_midi_event sound/core/seq/oss/seq_oss_midi.c:600 [inline] snd_seq_oss_midi_input+0x29f/0x500 sound/core/seq/oss/seq_oss_midi.c:524 snd_seq_oss_event_input+0xbc/0x100 sound/core/seq/oss/seq_oss_event.c:429 snd_seq_deliver_single_event+0x31b/0x4f0 sound/core/seq/seq_clientmgr.c:638 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:693 [inline] snd_seq_deliver_event+0x392/0x4a0 sound/core/seq/seq_clientmgr.c:828 snd_seq_kernel_client_dispatch+0x16f/0x190 sound/core/seq/seq_clientmgr.c:2323 snd_vmidi_output_work+0x16d/0x200 sound/core/seq/seq_virmidi.c:150 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3258 Comm: kworker/1:1H Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_highpri snd_vmidi_output_work ==================================================================