================================================================== BUG: KCSAN: data-race in queue_access_lock / snd_seq_check_queue read to 0xffff8880a8e25724 of 1 bytes by task 16277 on cpu 0: snd_seq_check_queue+0x59/0x200 sound/core/seq/seq_queue.c:247 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880a8e25724 of 1 bytes by interrupt on cpu 1: 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: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 find_watchpoint kernel/kcsan/core.c:105 [inline] check_access kernel/kcsan/core.c:446 [inline] __tsan_read2+0x61/0x100 kernel/kcsan/core.c:587 tomoyo_domain_quota_is_ok+0x29c/0x2b0 security/tomoyo/util.c:1039 tomoyo_supervisor+0x22b/0xd20 security/tomoyo/common.c:2087 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1222 vfs_getattr+0x2e/0x70 fs/stat.c:115 vfs_statx_fd+0x7a/0xd0 fs/stat.c:145 vfs_fstat include/linux/fs.h:3265 [inline] __do_sys_newfstat+0x49/0xa0 fs/stat.c:378 __se_sys_newfstat fs/stat.c:375 [inline] __x64_sys_newfstat+0x3a/0x50 fs/stat.c:375 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: 1 PID: 31412 Comm: udevd Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================