================================================================== BUG: KCSAN: data-race in snd_seq_prioq_cell_out / snd_seq_timer_interrupt read to 0xffff888099f12918 of 4 bytes by task 17143 on cpu 1: event_is_ready sound/core/seq/seq_prioq.c:205 [inline] snd_seq_prioq_cell_out+0x83/0x210 sound/core/seq/seq_prioq.c:225 snd_seq_check_queue+0xce/0x200 sound/core/seq/seq_queue.c:258 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_kernel_client_enqueue sound/core/seq/seq_clientmgr.c:2282 [inline] snd_seq_kernel_client_enqueue+0x13a/0x160 sound/core/seq/seq_clientmgr.c:2254 insert_queue sound/core/seq/oss/seq_oss_rw.c:173 [inline] snd_seq_oss_write+0x472/0x510 sound/core/seq/oss/seq_oss_rw.c:135 odev_write+0x51/0x80 sound/core/seq/oss/seq_oss.c:164 __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+0xd5/0x1b0 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888099f12918 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+0x202/0x280 sound/core/seq/seq_timer.c:150 snd_timer_process_callbacks+0x1e4/0x220 sound/core/timer.c:750 snd_timer_interrupt sound/core/timer.c:873 [inline] snd_timer_interrupt+0x483/0x930 sound/core/timer.c:794 snd_hrtimer_callback+0x18f/0x260 sound/core/hrtimer.c:50 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x274/0x5f0 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1641 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 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 __write_once_size include/linux/compiler.h:250 [inline] write_comp_data+0x68/0x70 kernel/kcov.c:230 old_event sound/core/seq/oss/seq_oss_event.c:97 [inline] snd_seq_oss_process_event+0x1f0/0xe20 sound/core/seq/oss/seq_oss_event.c:88 insert_queue sound/core/seq/oss/seq_oss_rw.c:166 [inline] snd_seq_oss_write+0x194/0x510 sound/core/seq/oss/seq_oss_rw.c:135 odev_write+0x51/0x80 sound/core/seq/oss/seq_oss.c:164 __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+0xd5/0x1b0 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17159 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================