./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3081193357 <...> Warning: Permanently added '10.128.0.180' (ED25519) to the list of known hosts. execve("./syz-executor3081193357", ["./syz-executor3081193357"], 0x7ffe06987b50 /* 10 vars */) = 0 brk(NULL) = 0x555563567000 brk(0x555563567d00) = 0x555563567d00 arch_prctl(ARCH_SET_FS, 0x555563567380) = 0 set_tid_address(0x555563567650) = 5062 set_robust_list(0x555563567660, 24) = 0 rseq(0x555563567ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3081193357", 4096) = 28 getrandom("\x60\x96\x79\x49\xb8\x7d\x69\x02", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555563567d00 brk(0x555563588d00) = 0x555563588d00 brk(0x555563589000) = 0x555563589000 mprotect(0x7fa98128d000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5063 attached , child_tidptr=0x555563567650) = 5063 [pid 5063] set_robust_list(0x555563567660, 24) = 0 [pid 5063] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5063] setpgid(0, 0) = 0 [pid 5063] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1000", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [ 80.020955][ T28] audit: type=1400 audit(1712733081.794:87): avc: denied { execmem } for pid=5062 comm="syz-executor308" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [pid 5063] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5063] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5063] exit_group(0) = ? [ 81.098144][ T5063] [ 81.100498][ T5063] ======================================================== [ 81.107680][ T5063] WARNING: possible irq lock inversion dependency detected [ 81.114857][ T5063] 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted [ 81.121574][ T5063] -------------------------------------------------------- [ 81.128757][ T5063] syz-executor308/5063 just changed the state of lock: [ 81.135595][ T5063] ffff888029d21948 (&timer->lock){+.+.}-{2:2}, at: snd_timer_close_locked+0x65/0xbd0 [ 81.145211][ T5063] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 81.153261][ T5063] (&group->lock#2){..-.}-{2:2} [ 81.153284][ T5063] [ 81.153284][ T5063] [ 81.153284][ T5063] and interrupts could create inverse lock ordering between them. [ 81.153284][ T5063] [ 81.172697][ T5063] [ 81.172697][ T5063] other info that might help us debug this: [ 81.180783][ T5063] Possible interrupt unsafe locking scenario: [ 81.180783][ T5063] [ 81.189098][ T5063] CPU0 CPU1 [ 81.194477][ T5063] ---- ---- [ 81.199832][ T5063] lock(&timer->lock); [ 81.204158][ T5063] local_irq_disable(); [ 81.210903][ T5063] lock(&group->lock#2); [ 81.217752][ T5063] lock(&timer->lock); [ 81.224418][ T5063] [ 81.227862][ T5063] lock(&group->lock#2); [ 81.232455][ T5063] [ 81.232455][ T5063] *** DEADLOCK *** [ 81.232455][ T5063] [ 81.240604][ T5063] 3 locks held by syz-executor308/5063: [ 81.246191][ T5063] #0: ffffffff8f1daaa8 (register_mutex#4){+.+.}-{3:3}, at: odev_release+0x4a/0x80 [ 81.255518][ T5063] #1: ffff88801f72a178 (&q->timer_mutex){+.+.}-{3:3}, at: queue_delete+0x21/0xa0 [ 81.264753][ T5063] #2: ffffffff8f1bc708 (register_mutex){+.+.}-{3:3}, at: snd_timer_close+0x7e/0xf0 [ 81.274170][ T5063] [ 81.274170][ T5063] the shortest dependencies between 2nd lock and 1st lock: [ 81.283576][ T5063] -> (&group->lock#2){..-.}-{2:2} { [ 81.288905][ T5063] IN-SOFTIRQ-W at: [ 81.292968][ T5063] lock_acquire+0x1b1/0x540 [ 81.299400][ T5063] _raw_spin_lock_irqsave+0x3a/0x60 [ 81.307303][ T5063] _snd_pcm_stream_lock_irqsave+0xa0/0xd0 [ 81.314851][ T5063] snd_pcm_period_elapsed+0x20/0x50 [ 81.321877][ T5063] dummy_hrtimer_callback+0x9d/0x1c0 [ 81.329000][ T5063] __hrtimer_run_queues+0x20c/0xc20 [ 81.336116][ T5063] hrtimer_run_softirq+0x17d/0x350 [ 81.343060][ T5063] __do_softirq+0x218/0x8de [ 81.349481][ T5063] irq_exit_rcu+0xb9/0x120 [ 81.355720][ T5063] sysvec_apic_timer_interrupt+0x95/0xb0 [ 81.363451][ T5063] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 81.371264][ T5063] folio_clear_dirty_for_io+0x3dc/0x800 [ 81.378759][ T5063] mpage_submit_folio+0x80/0x350 [ 81.385522][ T5063] mpage_map_and_submit_buffers+0x56e/0xac0 [ 81.393267][ T5063] ext4_do_writepages+0x1943/0x32e0 [ 81.400325][ T5063] ext4_writepages+0x30a/0x780 [ 81.406936][ T5063] do_writepages+0x1ad/0x660 [ 81.413376][ T5063] __writeback_single_inode+0x163/0xe90 [ 81.420761][ T5063] writeback_sb_inodes+0x5a6/0x1090 [ 81.427794][ T5063] __writeback_inodes_wb+0xff/0x2e0 [ 81.434828][ T5063] wb_writeback+0x7db/0xa90 [ 81.441172][ T5063] wb_workfn+0x856/0xe90 [ 81.447260][ T5063] process_one_work+0x9a9/0x1a60 [ 81.454022][ T5063] worker_thread+0x6c8/0xf70 [ 81.460433][ T5063] kthread+0x2c1/0x3a0 [ 81.466428][ T5063] ret_from_fork+0x45/0x80 [ 81.472688][ T5063] ret_from_fork_asm+0x1a/0x30 [ 81.479289][ T5063] INITIAL USE at: [ 81.483264][ T5063] lock_acquire+0x1b1/0x540 [ 81.489507][ T5063] _raw_spin_lock_irq+0x36/0x50 [ 81.496107][ T5063] snd_pcm_hw_params+0x151/0x1a30 [ 81.502882][ T5063] snd_pcm_kernel_ioctl+0x147/0x2d0 [ 81.509928][ T5063] snd_pcm_oss_change_params_locked+0x146c/0x3aa0 [ 81.518193][ T5063] snd_pcm_oss_make_ready_locked+0xb7/0x130 [ 81.526445][ T5063] snd_pcm_oss_read+0x3a2/0x760 [ 81.533060][ T5063] vfs_read+0x1d4/0xb80 [ 81.538954][ T5063] ksys_read+0x12f/0x260 [ 81.544933][ T5063] do_syscall_64+0xd2/0x260 [ 81.551176][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 81.558812][ T5063] } [ 81.561388][ T5063] ... key at: [] __key.5+0x0/0x40 [ 81.568592][ T5063] ... acquired at: [ 81.572471][ T5063] _raw_spin_lock_irqsave+0x3a/0x60 [ 81.577843][ T5063] snd_timer_notify+0x111/0x3e0 [ 81.582872][ T5063] snd_pcm_post_start+0x272/0x350 [ 81.588161][ T5063] snd_pcm_action_single+0x10a/0x150 [ 81.593637][ T5063] snd_pcm_action+0x70/0x90 [ 81.598418][ T5063] __snd_pcm_lib_xfer+0x175b/0x1ea0 [ 81.603784][ T5063] snd_pcm_oss_read3+0x18e/0x2d0 [ 81.608986][ T5063] snd_pcm_oss_read2+0x309/0x3d0 [ 81.614099][ T5063] snd_pcm_oss_read+0x5af/0x760 [ 81.619218][ T5063] vfs_read+0x1d4/0xb80 [ 81.623543][ T5063] ksys_read+0x12f/0x260 [ 81.628091][ T5063] do_syscall_64+0xd2/0x260 [ 81.632779][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 81.638850][ T5063] [ 81.641334][ T5063] -> (&timer->lock){+.+.}-{2:2} { [ 81.646372][ T5063] HARDIRQ-ON-W at: [ 81.650343][ T5063] lock_acquire+0x1b1/0x540 [ 81.656503][ T5063] _raw_spin_lock+0x2e/0x40 [ 81.662652][ T5063] snd_timer_close_locked+0x65/0xbd0 [ 81.669684][ T5063] snd_timer_close+0x8b/0xf0 [ 81.675918][ T5063] snd_seq_timer_close+0xa4/0x100 [ 81.682587][ T5063] queue_delete+0x49/0xa0 [ 81.688613][ T5063] snd_seq_queue_delete+0x45/0x60 [ 81.695315][ T5063] snd_seq_kernel_client_ctl+0x107/0x1c0 [ 81.702603][ T5063] delete_seq_queue.isra.0+0xc8/0x150 [ 81.709666][ T5063] odev_release+0x52/0x80 [ 81.715642][ T5063] __fput+0x270/0xb80 [ 81.721281][ T5063] task_work_run+0x14e/0x250 [ 81.727526][ T5063] do_exit+0xa7d/0x2be0 [ 81.733342][ T5063] do_group_exit+0xd3/0x2a0 [ 81.739499][ T5063] __x64_sys_exit_group+0x3e/0x50 [ 81.746276][ T5063] do_syscall_64+0xd2/0x260 [ 81.752437][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 81.759992][ T5063] SOFTIRQ-ON-W at: [ 81.763964][ T5063] lock_acquire+0x1b1/0x540 [ 81.770121][ T5063] _raw_spin_lock+0x2e/0x40 [ 81.776362][ T5063] snd_timer_close_locked+0x65/0xbd0 [ 81.783294][ T5063] snd_timer_close+0x8b/0xf0 [ 81.789528][ T5063] snd_seq_timer_close+0xa4/0x100 [ 81.796225][ T5063] queue_delete+0x49/0xa0 [ 81.802207][ T5063] snd_seq_queue_delete+0x45/0x60 [ 81.809158][ T5063] snd_seq_kernel_client_ctl+0x107/0x1c0 [ 81.816443][ T5063] delete_seq_queue.isra.0+0xc8/0x150 [ 81.823466][ T5063] odev_release+0x52/0x80 [ 81.829452][ T5063] __fput+0x270/0xb80 [ 81.835128][ T5063] task_work_run+0x14e/0x250 [ 81.841375][ T5063] do_exit+0xa7d/0x2be0 [ 81.847199][ T5063] do_group_exit+0xd3/0x2a0 [ 81.853352][ T5063] __x64_sys_exit_group+0x3e/0x50 [ 81.860034][ T5063] do_syscall_64+0xd2/0x260 [ 81.866205][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 81.873753][ T5063] INITIAL USE at: [ 81.877652][ T5063] lock_acquire+0x1b1/0x540 [ 81.883721][ T5063] _raw_spin_lock_irqsave+0x3a/0x60 [ 81.890482][ T5063] snd_timer_notify+0x111/0x3e0 [ 81.896899][ T5063] snd_pcm_post_start+0x272/0x350 [ 81.903491][ T5063] snd_pcm_action_single+0x10a/0x150 [ 81.910342][ T5063] snd_pcm_action+0x70/0x90 [ 81.916413][ T5063] __snd_pcm_lib_xfer+0x175b/0x1ea0 [ 81.923169][ T5063] snd_pcm_oss_read3+0x18e/0x2d0 [ 81.929673][ T5063] snd_pcm_oss_read2+0x309/0x3d0 [ 81.936270][ T5063] snd_pcm_oss_read+0x5af/0x760 [ 81.942781][ T5063] vfs_read+0x1d4/0xb80 [ 81.948501][ T5063] ksys_read+0x12f/0x260 [ 81.954307][ T5063] do_syscall_64+0xd2/0x260 [ 81.960379][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 81.967842][ T5063] } [ 81.970331][ T5063] ... key at: [] __key.6+0x0/0x40 [ 81.977442][ T5063] ... acquired at: [ 81.981233][ T5063] __lock_acquire+0x979/0x3b30 [ 81.986176][ T5063] lock_acquire+0x1b1/0x540 [ 81.990854][ T5063] _raw_spin_lock+0x2e/0x40 [ 81.995531][ T5063] snd_timer_close_locked+0x65/0xbd0 [ 82.000986][ T5063] snd_timer_close+0x8b/0xf0 [ 82.005744][ T5063] snd_seq_timer_close+0xa4/0x100 [ 82.010941][ T5063] queue_delete+0x49/0xa0 [ 82.015458][ T5063] snd_seq_queue_delete+0x45/0x60 [ 82.020657][ T5063] snd_seq_kernel_client_ctl+0x107/0x1c0 [ 82.026463][ T5063] delete_seq_queue.isra.0+0xc8/0x150 [ 82.032011][ T5063] odev_release+0x52/0x80 [ 82.036514][ T5063] __fput+0x270/0xb80 [ 82.040677][ T5063] task_work_run+0x14e/0x250 [ 82.045716][ T5063] do_exit+0xa7d/0x2be0 [ 82.050048][ T5063] do_group_exit+0xd3/0x2a0 [ 82.054731][ T5063] __x64_sys_exit_group+0x3e/0x50 [ 82.059935][ T5063] do_syscall_64+0xd2/0x260 [ 82.064618][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.070693][ T5063] [ 82.073097][ T5063] [ 82.073097][ T5063] stack backtrace: [ 82.078974][ T5063] CPU: 1 PID: 5063 Comm: syz-executor308 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 82.089055][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 82.099108][ T5063] Call Trace: [ 82.102388][ T5063] [ 82.105313][ T5063] dump_stack_lvl+0x116/0x1f0 [ 82.110001][ T5063] print_irq_inversion_bug.part.0+0x3e9/0x5a0 [ 82.116084][ T5063] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 82.122675][ T5063] ? __pfx_usage_skip+0x10/0x10 [ 82.127524][ T5063] ? __pfx_usage_match+0x10/0x10 [ 82.132466][ T5063] mark_lock+0x574/0xc60 [ 82.136713][ T5063] ? __pfx_mark_lock+0x10/0x10 [ 82.141480][ T5063] ? register_lock_class+0xb1/0x1230 [ 82.146771][ T5063] ? lockdep_unlock+0x11a/0x290 [ 82.151622][ T5063] __lock_acquire+0x979/0x3b30 [ 82.156393][ T5063] ? lock_acquire+0x1b1/0x540 [ 82.161079][ T5063] ? __pfx___lock_acquire+0x10/0x10 [ 82.166297][ T5063] ? __mutex_trylock_common+0xea/0x250 [ 82.171763][ T5063] lock_acquire+0x1b1/0x540 [ 82.176272][ T5063] ? snd_timer_close_locked+0x65/0xbd0 [ 82.181728][ T5063] ? __pfx_lock_acquire+0x10/0x10 [ 82.186758][ T5063] ? __mutex_lock+0x1a6/0x9c0 [ 82.191436][ T5063] ? __pfx___lock_acquire+0x10/0x10 [ 82.196637][ T5063] ? __pfx___mutex_trylock_common+0x10/0x10 [ 82.202537][ T5063] ? snd_timer_close+0x7e/0xf0 [ 82.207298][ T5063] ? __pfx_mark_lock+0x10/0x10 [ 82.212078][ T5063] _raw_spin_lock+0x2e/0x40 [ 82.216583][ T5063] ? snd_timer_close_locked+0x65/0xbd0 [ 82.222039][ T5063] snd_timer_close_locked+0x65/0xbd0 [ 82.227327][ T5063] snd_timer_close+0x8b/0xf0 [ 82.232001][ T5063] ? __pfx_snd_timer_close+0x10/0x10 [ 82.237283][ T5063] ? _raw_spin_unlock_irq+0x23/0x50 [ 82.242482][ T5063] ? lockdep_hardirqs_on+0x7c/0x110 [ 82.247681][ T5063] snd_seq_timer_close+0xa4/0x100 [ 82.252707][ T5063] queue_delete+0x49/0xa0 [ 82.257041][ T5063] snd_seq_queue_delete+0x45/0x60 [ 82.262079][ T5063] snd_seq_kernel_client_ctl+0x107/0x1c0 [ 82.267715][ T5063] ? __pfx_odev_release+0x10/0x10 [ 82.272740][ T5063] delete_seq_queue.isra.0+0xc8/0x150 [ 82.278115][ T5063] ? __pfx_delete_seq_queue.isra.0+0x10/0x10 [ 82.284105][ T5063] ? snd_seq_oss_midi_cleanup+0xae/0xe0 [ 82.289646][ T5063] odev_release+0x52/0x80 [ 82.294411][ T5063] __fput+0x270/0xb80 [ 82.298436][ T5063] task_work_run+0x14e/0x250 [ 82.303097][ T5063] ? __pfx_task_work_run+0x10/0x10 [ 82.308221][ T5063] ? do_raw_spin_unlock+0x172/0x230 [ 82.313426][ T5063] do_exit+0xa7d/0x2be0 [ 82.317681][ T5063] ? do_group_exit+0x1c3/0x2a0 [ 82.322450][ T5063] ? __pfx_lock_release+0x10/0x10 [ 82.327488][ T5063] ? do_raw_spin_lock+0x12d/0x2c0 [ 82.332629][ T5063] ? __pfx_do_exit+0x10/0x10 [ 82.337311][ T5063] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 82.342683][ T5063] do_group_exit+0xd3/0x2a0 [ 82.347194][ T5063] __x64_sys_exit_group+0x3e/0x50 [ 82.352223][ T5063] do_syscall_64+0xd2/0x260 [ 82.356736][ T5063] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.362637][ T5063] RIP: 0033:0x7fa981218b89 [ 82.367054][ T5063] Code: Unable to access opcode bytes at 0x7fa981218b5f. [ 82.374089][ T5063] RSP: 002b:00007ffdd94d98b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 82.382522][ T5063] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa981218b89 [ 82.390492][ T5063] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [pid 5063] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5063, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5064 ./strace-static-x86_64: Process 5064 attached [pid 5064] set_robust_list(0x555563567660, 24) = 0 [pid 5064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5064] setpgid(0, 0) = 0 [pid 5064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1000", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [ 82.398458][ T5063] RBP: 00007fa981293290 R08: ffffffffffffffb8 R09: 0000000000000006 [ 82.406426][ T5063] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa981293290 [ 82.414478][ T5063] R13: 0000000000000000 R14: 00007fa981293ce0 R15: 00007fa9811e9dc0 [ 82.422450][ T5063] [pid 5064] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5064] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5064] exit_group(0) = ? [pid 5064] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5064, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5065 attached , child_tidptr=0x555563567650) = 5065 [pid 5065] set_robust_list(0x555563567660, 24) = 0 [pid 5065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5065] setpgid(0, 0) = 0 [pid 5065] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1000", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5065] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5065] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5065] exit_group(0) = ? [pid 5065] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5065, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5066 ./strace-static-x86_64: Process 5066 attached [pid 5066] set_robust_list(0x555563567660, 24) = 0 [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setpgid(0, 0) = 0 [pid 5066] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1000", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5066] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5066] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5066] exit_group(0) = ? [pid 5066] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5066, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5067 ./strace-static-x86_64: Process 5067 attached [pid 5067] set_robust_list(0x555563567660, 24) = 0 [pid 5067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5067] setpgid(0, 0) = 0 [pid 5067] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1000", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5067] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5067] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5067] exit_group(0) = ? [pid 5067] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5067, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5068 ./strace-static-x86_64: Process 5068 attached [pid 5068] set_robust_list(0x555563567660, 24) = 0 [pid 5068] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5068] setpgid(0, 0) = 0 [pid 5068] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1000", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [ 87.415062][ T784] cfg80211: failed to load regulatory.db [pid 5068] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5068] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5068] exit_group(0) = ? [pid 5068] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5068, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5070 ./strace-static-x86_64: Process 5070 attached [pid 5070] set_robust_list(0x555563567660, 24) = 0 [pid 5070] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5070] setpgid(0, 0) = 0 [pid 5070] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1000", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5070] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5070] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5070] exit_group(0) = ? [pid 5070] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5070, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5071 ./strace-static-x86_64: Process 5071 attached [pid 5071] set_robust_list(0x555563567660, 24) = 0 [pid 5071] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5071] setpgid(0, 0) = 0 [pid 5071] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5071] write(3, "1000", 4) = 4 [pid 5071] close(3) = 0 [pid 5071] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5071] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5071] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5071] exit_group(0) = ? [pid 5071] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5071, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555563567650) = 5072 ./strace-static-x86_64: Process 5072 attached [pid 5072] set_robust_list(0x555563567660, 24) = 0 [pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5072] setpgid(0, 0) = 0 [pid 5072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1000", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/dev/dsp", O_RDONLY) = 3 [pid 5072] read(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4128) = 4128 [pid 5072] openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 4 [pid 5072] exit_group(0) = ? [pid 5072] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5072, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---