./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3109836279 <...> [ 101.826977][ T44] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.245' (ED25519) to the list of known hosts. execve("./syz-executor3109836279", ["./syz-executor3109836279"], 0x7fff9026fd40 /* 10 vars */) = 0 brk(NULL) = 0x5555698da000 brk(0x5555698dad00) = 0x5555698dad00 arch_prctl(ARCH_SET_FS, 0x5555698da380) = 0 set_tid_address(0x5555698da650) = 5083 set_robust_list(0x5555698da660, 24) = 0 rseq(0x5555698daca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3109836279", 4096) = 28 getrandom("\x7e\xd7\xb5\xb2\xdd\xe4\xe5\x64", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555698dad00 brk(0x5555698fbd00) = 0x5555698fbd00 brk(0x5555698fc000) = 0x5555698fc000 mprotect(0x7fddaec57000, 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 5084 attached , child_tidptr=0x5555698da650) = 5084 [pid 5084] set_robust_list(0x5555698da660, 24) = 0 [pid 5084] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5084] setpgid(0, 0) = 0 [pid 5084] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5084] write(3, "1000", 4) = 4 [pid 5084] close(3) = 0 [pid 5084] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5084] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5084] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5084] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5084] exit_group(0) = ? [ 108.109159][ T5084] [ 108.111516][ T5084] ======================================================== [ 108.118706][ T5084] WARNING: possible irq lock inversion dependency detected [ 108.125894][ T5084] 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted [ 108.132568][ T5084] -------------------------------------------------------- [ 108.139755][ T5084] syz-executor310/5084 just changed the state of lock: [ 108.146598][ T5084] ffff888029c1f948 (&timer->lock){+.+.}-{2:2}, at: snd_timer_close_locked+0x65/0xbd0 [ 108.156138][ T5084] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 108.164205][ T5084] (&group->lock#2){..-.}-{2:2} [ 108.164252][ T5084] [ 108.164252][ T5084] [ 108.164252][ T5084] and interrupts could create inverse lock ordering between them. [ 108.164252][ T5084] [ 108.183394][ T5084] [ 108.183394][ T5084] other info that might help us debug this: [ 108.191447][ T5084] Possible interrupt unsafe locking scenario: [ 108.191447][ T5084] [ 108.199760][ T5084] CPU0 CPU1 [ 108.205136][ T5084] ---- ---- [ 108.210500][ T5084] lock(&timer->lock); [ 108.214674][ T5084] local_irq_disable(); [ 108.221426][ T5084] lock(&group->lock#2); [ 108.228293][ T5084] lock(&timer->lock); [ 108.234976][ T5084] [ 108.238425][ T5084] lock(&group->lock#2); [ 108.242957][ T5084] [ 108.242957][ T5084] *** DEADLOCK *** [ 108.242957][ T5084] [ 108.251095][ T5084] 2 locks held by syz-executor310/5084: [ 108.256643][ T5084] #0: ffff8880162cdd68 (&tu->ioctl_lock){+.+.}-{3:3}, at: snd_timer_user_release+0x7c/0x260 [ 108.266877][ T5084] #1: ffffffff8f1c72c8 (register_mutex){+.+.}-{3:3}, at: snd_timer_close+0x7e/0xf0 [ 108.276328][ T5084] [ 108.276328][ T5084] the shortest dependencies between 2nd lock and 1st lock: [ 108.285707][ T5084] -> (&group->lock#2){..-.}-{2:2} { [ 108.291045][ T5084] IN-SOFTIRQ-W at: [ 108.295116][ T5084] lock_acquire+0x1b1/0x540 [ 108.301470][ T5084] _raw_spin_lock_irqsave+0x3a/0x60 [ 108.308514][ T5084] _snd_pcm_stream_lock_irqsave+0xa0/0xd0 [ 108.316076][ T5084] snd_pcm_period_elapsed+0x20/0x50 [ 108.323124][ T5084] loopback_jiffies_timer_function+0x1c8/0x240 [ 108.331112][ T5084] call_timer_fn+0x1a3/0x5b0 [ 108.337538][ T5084] __run_timers+0x74b/0xab0 [ 108.343874][ T5084] run_timer_base+0x111/0x190 [ 108.350387][ T5084] run_timer_softirq+0x1a/0x40 [ 108.356990][ T5084] __do_softirq+0x21b/0x8de [ 108.363341][ T5084] irq_exit_rcu+0xb9/0x120 [ 108.369604][ T5084] sysvec_apic_timer_interrupt+0x95/0xb0 [ 108.377081][ T5084] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 108.384910][ T5084] acpi_safe_halt+0x1a/0x20 [ 108.391249][ T5084] acpi_idle_enter+0xc5/0x160 [ 108.397764][ T5084] cpuidle_enter_state+0x88/0x510 [ 108.404641][ T5084] cpuidle_enter+0x4e/0xa0 [ 108.410888][ T5084] do_idle+0x313/0x3f0 [ 108.416795][ T5084] cpu_startup_entry+0x4f/0x60 [ 108.423406][ T5084] rest_init+0x16f/0x2b0 [ 108.429520][ T5084] arch_call_rest_init+0x13/0x40 [ 108.436321][ T5084] start_kernel+0x3a3/0x490 [ 108.442683][ T5084] x86_64_start_reservations+0x18/0x30 [ 108.449996][ T5084] x86_64_start_kernel+0xb2/0xc0 [ 108.456786][ T5084] common_startup_64+0x13e/0x148 [ 108.463565][ T5084] INITIAL USE at: [ 108.467546][ T5084] lock_acquire+0x1b1/0x540 [ 108.473801][ T5084] _raw_spin_lock_irq+0x36/0x50 [ 108.480403][ T5084] snd_pcm_hw_params+0x151/0x1a30 [ 108.487174][ T5084] snd_pcm_kernel_ioctl+0x147/0x2d0 [ 108.494138][ T5084] snd_pcm_oss_change_params_locked+0x146c/0x3aa0 [ 108.502322][ T5084] snd_pcm_oss_make_ready_locked+0xb7/0x130 [ 108.509968][ T5084] snd_pcm_oss_read+0x3a2/0x760 [ 108.516665][ T5084] vfs_read+0x1d7/0xb80 [ 108.522594][ T5084] ksys_read+0x12f/0x260 [ 108.528704][ T5084] do_syscall_64+0xd5/0x260 [ 108.534997][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.542656][ T5084] } [ 108.545240][ T5084] ... key at: [] __key.5+0x0/0x40 [ 108.552465][ T5084] ... acquired at: [ 108.556363][ T5084] _raw_spin_lock_irqsave+0x3a/0x60 [ 108.561776][ T5084] snd_timer_notify+0x111/0x3e0 [ 108.566844][ T5084] snd_pcm_post_start+0x272/0x350 [ 108.572077][ T5084] snd_pcm_action_single+0x10d/0x150 [ 108.577581][ T5084] snd_pcm_action+0x70/0x90 [ 108.582310][ T5084] __snd_pcm_lib_xfer+0x175b/0x1ea0 [ 108.587747][ T5084] snd_pcm_oss_read3+0x18e/0x2d0 [ 108.594082][ T5084] io_capture_transfer+0x273/0x300 [ 108.599434][ T5084] snd_pcm_plug_read_transfer+0x1b6/0x300 [ 108.605380][ T5084] snd_pcm_oss_read2+0x1dc/0x3d0 [ 108.610527][ T5084] snd_pcm_oss_read+0x5af/0x760 [ 108.615587][ T5084] vfs_read+0x1d7/0xb80 [ 108.619952][ T5084] ksys_read+0x12f/0x260 [ 108.624404][ T5084] do_syscall_64+0xd5/0x260 [ 108.629130][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.635244][ T5084] [ 108.637576][ T5084] -> (&timer->lock){+.+.}-{2:2} { [ 108.642670][ T5084] HARDIRQ-ON-W at: [ 108.646663][ T5084] lock_acquire+0x1b1/0x540 [ 108.652846][ T5084] _raw_spin_lock+0x2e/0x40 [ 108.659028][ T5084] snd_timer_close_locked+0x65/0xbd0 [ 108.666020][ T5084] snd_timer_close+0x8b/0xf0 [ 108.672304][ T5084] snd_timer_user_release+0x91/0x260 [ 108.679283][ T5084] __fput+0x273/0xb80 [ 108.684939][ T5084] task_work_run+0x151/0x250 [ 108.691217][ T5084] do_exit+0xa7d/0x2be0 [ 108.697052][ T5084] do_group_exit+0xd3/0x2a0 [ 108.703233][ T5084] __x64_sys_exit_group+0x3e/0x50 [ 108.709941][ T5084] do_syscall_64+0xd5/0x260 [ 108.716141][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.723728][ T5084] SOFTIRQ-ON-W at: [ 108.727720][ T5084] lock_acquire+0x1b1/0x540 [ 108.733900][ T5084] _raw_spin_lock+0x2e/0x40 [ 108.740079][ T5084] snd_timer_close_locked+0x65/0xbd0 [ 108.747058][ T5084] snd_timer_close+0x8b/0xf0 [ 108.753340][ T5084] snd_timer_user_release+0x91/0x260 [ 108.760319][ T5084] __fput+0x273/0xb80 [ 108.765974][ T5084] task_work_run+0x151/0x250 [ 108.772244][ T5084] do_exit+0xa7d/0x2be0 [ 108.778073][ T5084] do_group_exit+0xd3/0x2a0 [ 108.784252][ T5084] __x64_sys_exit_group+0x3e/0x50 [ 108.790960][ T5084] do_syscall_64+0xd5/0x260 [ 108.797168][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.804757][ T5084] INITIAL USE at: [ 108.808672][ T5084] lock_acquire+0x1b1/0x540 [ 108.814767][ T5084] _raw_spin_lock_irqsave+0x3a/0x60 [ 108.821562][ T5084] snd_timer_notify+0x111/0x3e0 [ 108.828013][ T5084] snd_pcm_post_start+0x272/0x350 [ 108.834647][ T5084] snd_pcm_action_single+0x10d/0x150 [ 108.841518][ T5084] snd_pcm_action+0x70/0x90 [ 108.847619][ T5084] __snd_pcm_lib_xfer+0x175b/0x1ea0 [ 108.854433][ T5084] snd_pcm_oss_read3+0x18e/0x2d0 [ 108.860968][ T5084] io_capture_transfer+0x273/0x300 [ 108.867678][ T5084] snd_pcm_plug_read_transfer+0x1b6/0x300 [ 108.875000][ T5084] snd_pcm_oss_read2+0x1dc/0x3d0 [ 108.881538][ T5084] snd_pcm_oss_read+0x5af/0x760 [ 108.887984][ T5084] vfs_read+0x1d7/0xb80 [ 108.893739][ T5084] ksys_read+0x12f/0x260 [ 108.899583][ T5084] do_syscall_64+0xd5/0x260 [ 108.905694][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.913197][ T5084] } [ 108.915704][ T5084] ... key at: [] __key.6+0x0/0x40 [ 108.922866][ T5084] ... acquired at: [ 108.926672][ T5084] __lock_acquire+0x979/0x3b30 [ 108.931635][ T5084] lock_acquire+0x1b1/0x540 [ 108.936337][ T5084] _raw_spin_lock+0x2e/0x40 [ 108.941041][ T5084] snd_timer_close_locked+0x65/0xbd0 [ 108.946540][ T5084] snd_timer_close+0x8b/0xf0 [ 108.951343][ T5084] snd_timer_user_release+0x91/0x260 [ 108.956842][ T5084] __fput+0x273/0xb80 [ 108.961020][ T5084] task_work_run+0x151/0x250 [ 108.965818][ T5084] do_exit+0xa7d/0x2be0 [ 108.970173][ T5084] do_group_exit+0xd3/0x2a0 [ 108.974884][ T5084] __x64_sys_exit_group+0x3e/0x50 [ 108.980129][ T5084] do_syscall_64+0xd5/0x260 [ 108.984852][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.990961][ T5084] [ 108.993292][ T5084] [ 108.993292][ T5084] stack backtrace: [ 108.999187][ T5084] CPU: 0 PID: 5084 Comm: syz-executor310 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 109.009284][ T5084] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 109.019358][ T5084] Call Trace: [ 109.022650][ T5084] [ 109.025592][ T5084] dump_stack_lvl+0x116/0x1f0 [ 109.030303][ T5084] print_irq_inversion_bug.part.0+0x3e9/0x5a0 [ 109.036422][ T5084] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 109.043040][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.047937][ T5084] ? __pfx_usage_match+0x10/0x10 [ 109.052924][ T5084] mark_lock+0x574/0xc60 [ 109.057199][ T5084] ? __pfx_mark_lock+0x10/0x10 [ 109.061988][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.066883][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.071778][ T5084] ? register_lock_class+0xb1/0x1230 [ 109.077098][ T5084] ? __pfx_register_lock_class+0x10/0x10 [ 109.082771][ T5084] __lock_acquire+0x979/0x3b30 [ 109.087573][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.092463][ T5084] ? lock_acquire+0x1b1/0x540 [ 109.097169][ T5084] ? __pfx___lock_acquire+0x10/0x10 [ 109.102399][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.107300][ T5084] lock_acquire+0x1b1/0x540 [ 109.111835][ T5084] ? snd_timer_close_locked+0x65/0xbd0 [ 109.117345][ T5084] ? __pfx_lock_acquire+0x10/0x10 [ 109.122400][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.127294][ T5084] ? __mutex_lock+0x1a6/0x9c0 [ 109.132019][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.136919][ T5084] ? rcu_is_watching+0x12/0xc0 [ 109.141739][ T5084] ? snd_timer_close+0x7e/0xf0 [ 109.146566][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.151463][ T5084] ? trace_contention_end+0xea/0x120 [ 109.156785][ T5084] ? __pfx_snd_timer_user_release+0x10/0x10 [ 109.162727][ T5084] _raw_spin_lock+0x2e/0x40 [ 109.167264][ T5084] ? snd_timer_close_locked+0x65/0xbd0 [ 109.172765][ T5084] snd_timer_close_locked+0x65/0xbd0 [ 109.178105][ T5084] ? __pfx___mutex_lock+0x10/0x10 [ 109.183174][ T5084] ? __pfx_snd_timer_user_release+0x10/0x10 [ 109.189116][ T5084] snd_timer_close+0x8b/0xf0 [ 109.193751][ T5084] ? __pfx_snd_timer_close+0x10/0x10 [ 109.199090][ T5084] ? __pfx_snd_timer_user_release+0x10/0x10 [ 109.205035][ T5084] snd_timer_user_release+0x91/0x260 [ 109.210367][ T5084] ? __pfx_snd_timer_user_release+0x10/0x10 [ 109.216312][ T5084] __fput+0x273/0xb80 [ 109.220330][ T5084] task_work_run+0x151/0x250 [ 109.224964][ T5084] ? __pfx_task_work_run+0x10/0x10 [ 109.230110][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.235004][ T5084] ? do_raw_spin_unlock+0x172/0x230 [ 109.240248][ T5084] do_exit+0xa7d/0x2be0 [ 109.244431][ T5084] ? do_group_exit+0x1c3/0x2a0 [ 109.249227][ T5084] ? __pfx_lock_release+0x10/0x10 [ 109.254279][ T5084] ? srso_return_thunk+0x5/0x5f [ 109.259184][ T5084] ? do_raw_spin_lock+0x12d/0x2c0 [ 109.264246][ T5084] ? __pfx_do_exit+0x10/0x10 [ 109.268860][ T5084] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 109.274275][ T5084] do_group_exit+0xd3/0x2a0 [ 109.278814][ T5084] __x64_sys_exit_group+0x3e/0x50 [ 109.283867][ T5084] do_syscall_64+0xd5/0x260 [ 109.288421][ T5084] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 109.294360][ T5084] RIP: 0033:0x7fddaebe2bc9 [ 109.298791][ T5084] Code: Unable to access opcode bytes at 0x7fddaebe2b9f. [ 109.305843][ T5084] RSP: 002b:00007ffd0b8c9398 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [pid 5084] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5084, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5085 attached , child_tidptr=0x5555698da650) = 5085 [pid 5085] set_robust_list(0x5555698da660, 24) = 0 [pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5085] setpgid(0, 0) = 0 [pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5085] write(3, "1000", 4) = 4 [pid 5085] close(3) = 0 [pid 5085] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5085] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [ 109.314295][ T5084] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fddaebe2bc9 [ 109.322288][ T5084] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 109.330279][ T5084] RBP: 00007fddaec5d2b0 R08: ffffffffffffffb8 R09: 0000000000000006 [ 109.338272][ T5084] R10: 0000000000000006 R11: 0000000000000246 R12: 00007fddaec5d2b0 [ 109.346272][ T5084] R13: 0000000000000000 R14: 00007fddaec5dd00 R15: 00007fddaebb3e30 [ 109.354275][ T5084] [pid 5085] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5085] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5085] exit_group(0) = ? [pid 5085] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5087 attached [pid 5087] set_robust_list(0x5555698da660, 24 [pid 5083] <... clone resumed>, child_tidptr=0x5555698da650) = 5087 [pid 5087] <... set_robust_list resumed>) = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5087] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5087] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5087] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5087] exit_group(0) = ? [pid 5087] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5088 attached , child_tidptr=0x5555698da650) = 5088 [pid 5088] set_robust_list(0x5555698da660, 24) = 0 [pid 5088] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5088] setpgid(0, 0) = 0 [pid 5088] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5088] write(3, "1000", 4) = 4 [pid 5088] close(3) = 0 [pid 5088] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5088] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5088] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5088] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5088] exit_group(0) = ? [pid 5088] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5088, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5089 ./strace-static-x86_64: Process 5089 attached [pid 5089] set_robust_list(0x5555698da660, 24) = 0 [pid 5089] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5089] setpgid(0, 0) = 0 [pid 5089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5089] write(3, "1000", 4) = 4 [pid 5089] close(3) = 0 [pid 5089] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5089] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5089] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5089] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5089] exit_group(0) = ? [pid 5089] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5089, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5090 attached [pid 5090] set_robust_list(0x5555698da660, 24 [pid 5083] <... clone resumed>, child_tidptr=0x5555698da650) = 5090 [pid 5090] <... set_robust_list resumed>) = 0 [pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5090] setpgid(0, 0) = 0 [pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5090] write(3, "1000", 4) = 4 [pid 5090] close(3) = 0 [pid 5090] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5090] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5090] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5090] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5090] exit_group(0) = ? [pid 5090] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5090, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5091 ./strace-static-x86_64: Process 5091 attached [pid 5091] set_robust_list(0x5555698da660, 24) = 0 [pid 5091] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5091] setpgid(0, 0) = 0 [pid 5091] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5091] write(3, "1000", 4) = 4 [pid 5091] close(3) = 0 [pid 5091] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5091] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5091] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5091] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5091] exit_group(0) = ? [pid 5091] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5091, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5093 ./strace-static-x86_64: Process 5093 attached [pid 5093] set_robust_list(0x5555698da660, 24) = 0 [pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5093] setpgid(0, 0) = 0 [pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5093] write(3, "1000", 4) = 4 [pid 5093] close(3) = 0 [pid 5093] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5093] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5093] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5093] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5093] exit_group(0) = ? [pid 5093] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5093, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5094 ./strace-static-x86_64: Process 5094 attached [pid 5094] set_robust_list(0x5555698da660, 24) = 0 [pid 5094] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5094] setpgid(0, 0) = 0 [pid 5094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5094] write(3, "1000", 4) = 4 [pid 5094] close(3) = 0 [pid 5094] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5094] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5094] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5094] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5094] exit_group(0) = ? [pid 5094] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5094, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5095 ./strace-static-x86_64: Process 5095 attached [pid 5095] set_robust_list(0x5555698da660, 24) = 0 [pid 5095] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5095] setpgid(0, 0) = 0 [pid 5095] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5095] write(3, "1000", 4) = 4 [pid 5095] close(3) = 0 [pid 5095] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5095] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5095] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5095] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5095] exit_group(0) = ? [pid 5095] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5095, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5096 ./strace-static-x86_64: Process 5096 attached [pid 5096] set_robust_list(0x5555698da660, 24) = 0 [pid 5096] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5096] setpgid(0, 0) = 0 [pid 5096] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5096] write(3, "1000", 4) = 4 [pid 5096] close(3) = 0 [pid 5096] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5096] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5096] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5096] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5096] exit_group(0) = ? [pid 5096] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5096, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5097 ./strace-static-x86_64: Process 5097 attached [pid 5097] set_robust_list(0x5555698da660, 24) = 0 [pid 5097] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5097] setpgid(0, 0) = 0 [pid 5097] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5097] write(3, "1000", 4) = 4 [pid 5097] close(3) = 0 [pid 5097] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5097] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5097] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5097] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5097] exit_group(0) = ? [pid 5097] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5097, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5099 ./strace-static-x86_64: Process 5099 attached [pid 5099] set_robust_list(0x5555698da660, 24) = 0 [pid 5099] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5099] setpgid(0, 0) = 0 [pid 5099] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5099] write(3, "1000", 4) = 4 [pid 5099] close(3) = 0 [pid 5099] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5099] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5099] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5099] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5099] exit_group(0) = ? [pid 5099] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5099, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5100 attached [pid 5100] set_robust_list(0x5555698da660, 24 [pid 5083] <... clone resumed>, child_tidptr=0x5555698da650) = 5100 [pid 5100] <... set_robust_list resumed>) = 0 [pid 5100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5100] setpgid(0, 0) = 0 [pid 5100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5100] write(3, "1000", 4) = 4 [pid 5100] close(3) = 0 [pid 5100] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5100] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5100] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5100] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5100] exit_group(0) = ? [pid 5100] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5100, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5101 ./strace-static-x86_64: Process 5101 attached [pid 5101] set_robust_list(0x5555698da660, 24) = 0 [pid 5101] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5101] setpgid(0, 0) = 0 [pid 5101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5101] write(3, "1000", 4) = 4 [pid 5101] close(3) = 0 [pid 5101] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 5101] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x200083c0) = 0 [pid 5101] openat(AT_FDCWD, "/dev/audio1", O_RDONLY) = 4 [pid 5101] read(4, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"..., 4096) = 4096 [pid 5101] exit_group(0) = ? [pid 5101] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5101, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555698da650) = 5102 ./strace-static-x86_64: Process 5102 attached [pid 5102] set_robust_list(0x5555698da660, 24) = 0 [pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0