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BUG: KCSAN: data-race in snd_seq_prioq_cell_out / snd_seq_timer_interrupt

write to 0xffff888084266198 of 4 bytes by interrupt on cpu 0:
 snd_seq_timer_update_tick sound/core/seq/seq_timer.h:58 [inline]
 snd_seq_timer_interrupt+0x1e4/0x260 sound/core/seq/seq_timer.c:150
 snd_timer_process_callbacks+0x1eb/0x230 sound/core/timer.c:796
 snd_timer_interrupt sound/core/timer.c:919 [inline]
 snd_timer_interrupt+0x488/0x950 sound/core/timer.c:840
 snd_hrtimer_callback+0x188/0x250 sound/core/hrtimer.c:50
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 _raw_read_unlock_bh+0x0/0x30
 sock_i_uid+0x65/0x80 net/core/sock.c:2069
 inet_csk_bind_conflict+0x9d/0x3e0 net/ipv4/inet_connection_sock.c:135
 inet_csk_find_open_port net/ipv4/inet_connection_sock.c:222 [inline]
 inet_csk_get_port+0x7ae/0x12d0 net/ipv4/inet_connection_sock.c:300
 __inet_bind+0x372/0x680 net/ipv4/af_inet.c:524
 inet_bind+0xc0/0x100 net/ipv4/af_inet.c:453
 rds_tcp_conn_path_connect+0x21a/0x5d0 net/rds/tcp_connect.c:144
 rds_connect_worker+0x10b/0x1a0 net/rds/threads.c:176
 process_one_work+0x424/0x930 kernel/workqueue.c:2264
 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2410
 kthread+0x1cb/0x1f0 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff888084266198 of 4 bytes by task 24701 on cpu 1:
 event_is_ready sound/core/seq/seq_prioq.c:205 [inline]
 snd_seq_prioq_cell_out+0x7b/0x200 sound/core/seq/seq_prioq.c:225
 snd_seq_check_queue+0xd6/0x210 sound/core/seq/seq_queue.c:258
 snd_seq_enqueue_event+0x15a/0x2a0 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+0x227/0x4e0 sound/core/seq/seq_clientmgr.c:1093
 __vfs_write+0x58/0xb0 fs/read_write.c:494
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x189/0x380 fs/read_write.c:542
 ksys_write+0x16a/0x1a0 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+0x49/0x60 fs/read_write.c:620
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 24701 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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