./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4214349440 <...> Warning: Permanently added '10.128.0.236' (ED25519) to the list of known hosts. execve("./syz-executor4214349440", ["./syz-executor4214349440"], 0x7ffcffdbd620 /* 10 vars */) = 0 brk(NULL) = 0x5555899da000 brk(0x5555899dad00) = 0x5555899dad00 arch_prctl(ARCH_SET_FS, 0x5555899da380) = 0 set_tid_address(0x5555899da650) = 5071 set_robust_list(0x5555899da660, 24) = 0 rseq(0x5555899daca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4214349440", 4096) = 28 getrandom("\xda\xd5\x62\xfd\x46\x87\x28\xa3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555899dad00 brk(0x5555899fbd00) = 0x5555899fbd00 brk(0x5555899fc000) = 0x5555899fc000 mprotect(0x7fa80e169000, 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 openat(AT_FDCWD, "/dev/sequencer2", O_RDONLY) = 3 openat(AT_FDCWD, "/dev/audio", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_LARGEFILE, 000) = 4 write(4, "#! ./file0\n", 11) = 11 exit_group(0) = ? [ 76.906120][ T5071] [ 76.908498][ T5071] ================================ [ 76.913593][ T5071] WARNING: inconsistent lock state [ 76.918689][ T5071] 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted [ 76.925370][ T5071] -------------------------------- [ 76.930485][ T5071] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. [ 76.937326][ T5071] syz-executor421/5071 [HC0[0]:SC0[0]:HE1:SE1] takes: [ 76.944091][ T5071] ffff888029d30148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_close_locked+0x53/0x8d0 [ 76.953653][ T5071] {IN-SOFTIRQ-W} state was registered at: [ 76.959368][ T5071] lock_acquire+0x1e4/0x530 [ 76.963969][ T5071] _raw_spin_lock_irqsave+0xd5/0x120 [ 76.969366][ T5071] snd_timer_notify+0x103/0x3d0 [ 76.974310][ T5071] snd_pcm_drain_done+0x2b8/0x3e0 [ 76.979447][ T5071] snd_pcm_update_state+0x31b/0x410 [ 76.984739][ T5071] snd_pcm_update_hw_ptr0+0x1066/0x1a70 [ 76.990397][ T5071] snd_pcm_period_elapsed_under_stream_lock+0xeb/0x210 [ 76.997347][ T5071] snd_pcm_period_elapsed+0x2c/0x50 [ 77.002636][ T5071] dummy_hrtimer_callback+0x7f/0x180 [ 77.008004][ T5071] __hrtimer_run_queues+0x597/0xd00 [ 77.013300][ T5071] hrtimer_run_softirq+0x19a/0x2c0 [ 77.018511][ T5071] __do_softirq+0x2be/0x943 [ 77.023137][ T5071] __irq_exit_rcu+0xf2/0x1c0 [ 77.027820][ T5071] irq_exit_rcu+0x9/0x30 [ 77.032145][ T5071] sysvec_apic_timer_interrupt+0xa6/0xc0 [ 77.037902][ T5071] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 77.043978][ T5071] acpi_safe_halt+0x21/0x30 [ 77.048576][ T5071] acpi_idle_enter+0xe4/0x140 [ 77.053349][ T5071] cpuidle_enter_state+0x11a/0x490 [ 77.058558][ T5071] cpuidle_enter+0x5d/0xa0 [ 77.063059][ T5071] do_idle+0x375/0x5d0 [ 77.067220][ T5071] cpu_startup_entry+0x42/0x60 [ 77.072069][ T5071] rest_init+0x2e0/0x300 [ 77.076398][ T5071] arch_call_rest_init+0xe/0x10 [ 77.081335][ T5071] start_kernel+0x47a/0x500 [ 77.085948][ T5071] x86_64_start_reservations+0x2a/0x30 [ 77.091506][ T5071] x86_64_start_kernel+0x99/0xa0 [ 77.096535][ T5071] common_startup_64+0x13e/0x147 [ 77.101563][ T5071] irq event stamp: 5049 [ 77.105701][ T5071] hardirqs last enabled at (5049): [] _raw_spin_unlock_irq+0x23/0x50 [ 77.115432][ T5071] hardirqs last disabled at (5048): [] _raw_spin_lock_irq+0xad/0x120 [ 77.125067][ T5071] softirqs last enabled at (4476): [] __irq_exit_rcu+0xf2/0x1c0 [ 77.134342][ T5071] softirqs last disabled at (4465): [] __irq_exit_rcu+0xf2/0x1c0 [ 77.143618][ T5071] [ 77.143618][ T5071] other info that might help us debug this: [ 77.151689][ T5071] Possible unsafe locking scenario: [ 77.151689][ T5071] [ 77.159153][ T5071] CPU0 [ 77.162441][ T5071] ---- [ 77.165715][ T5071] lock(&timer->lock); [ 77.169885][ T5071] [ 77.173337][ T5071] lock(&timer->lock); [ 77.177671][ T5071] [ 77.177671][ T5071] *** DEADLOCK *** [ 77.177671][ T5071] [ 77.185804][ T5071] 3 locks held by syz-executor421/5071: [ 77.191339][ T5071] #0: ffffffff8f2e5728 (register_mutex#4){+.+.}-{3:3}, at: odev_release+0x4e/0x80 [ 77.200785][ T5071] #1: ffff88807b78d978 (&q->timer_mutex){+.+.}-{3:3}, at: snd_seq_queue_delete+0x5b/0xf0 [ 77.210746][ T5071] #2: ffffffff8f2d3f68 (register_mutex){+.+.}-{3:3}, at: snd_timer_close+0xa3/0x130 [ 77.220377][ T5071] [ 77.220377][ T5071] stack backtrace: [ 77.226261][ T5071] CPU: 0 PID: 5071 Comm: syz-executor421 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 77.236324][ T5071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 77.246372][ T5071] Call Trace: [ 77.249646][ T5071] [ 77.252585][ T5071] dump_stack_lvl+0x241/0x360 [ 77.257291][ T5071] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.262505][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.267370][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.272229][ T5071] ? print_usage_bug+0x61a/0x8a0 [ 77.277184][ T5071] ? is_bpf_text_address+0x28d/0x2b0 [ 77.282499][ T5071] valid_state+0x13a/0x1c0 [ 77.286936][ T5071] mark_lock_irq+0xbb/0xc20 [ 77.291470][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.296320][ T5071] ? arch_stack_walk+0x16d/0x1b0 [ 77.301260][ T5071] ? __pfx_mark_lock_irq+0x10/0x10 [ 77.306384][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.311245][ T5071] ? stack_trace_save+0x118/0x1d0 [ 77.316378][ T5071] ? __pfx_stack_trace_save+0x10/0x10 [ 77.321767][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.326623][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.331489][ T5071] ? save_trace+0x749/0xb40 [ 77.336020][ T5071] mark_lock+0x223/0x350 [ 77.340274][ T5071] __lock_acquire+0x116e/0x1fd0 [ 77.345151][ T5071] lock_acquire+0x1e4/0x530 [ 77.349664][ T5071] ? snd_timer_close_locked+0x53/0x8d0 [ 77.355139][ T5071] ? __pfx___mutex_trylock_common+0x10/0x10 [ 77.361078][ T5071] ? __pfx_lock_acquire+0x10/0x10 [ 77.366115][ T5071] ? rcu_is_watching+0x15/0xb0 [ 77.370889][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.375854][ T5071] ? trace_contention_end+0x3c/0x100 [ 77.381175][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.386037][ T5071] ? __mutex_lock+0x2ef/0xd70 [ 77.390718][ T5071] ? snd_timer_close+0xa3/0x130 [ 77.395591][ T5071] _raw_spin_lock+0x2e/0x40 [ 77.400127][ T5071] ? snd_timer_close_locked+0x53/0x8d0 [ 77.405595][ T5071] snd_timer_close_locked+0x53/0x8d0 [ 77.410893][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.415746][ T5071] snd_timer_close+0xae/0x130 [ 77.420425][ T5071] ? __pfx_snd_timer_close+0x10/0x10 [ 77.425898][ T5071] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.431380][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.436238][ T5071] ? lockdep_hardirqs_on+0x99/0x150 [ 77.441463][ T5071] snd_seq_timer_close+0xa9/0xe0 [ 77.446403][ T5071] snd_seq_queue_delete+0x8f/0xf0 [ 77.451438][ T5071] snd_seq_oss_release+0x1d3/0x310 [ 77.456548][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.461397][ T5071] ? __pfx_snd_seq_oss_release+0x10/0x10 [ 77.467050][ T5071] ? __asan_memset+0x23/0x50 [ 77.471672][ T5071] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.478004][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.482856][ T5071] ? evm_file_release+0x140/0x1d0 [ 77.487879][ T5071] ? __pfx_odev_release+0x10/0x10 [ 77.492921][ T5071] odev_release+0x56/0x80 [ 77.497260][ T5071] __fput+0x42b/0x8a0 [ 77.501253][ T5071] task_work_run+0x251/0x310 [ 77.505856][ T5071] ? __pfx_task_work_run+0x10/0x10 [ 77.510985][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.515841][ T5071] ? switch_task_namespaces+0xe1/0x110 [ 77.521302][ T5071] do_exit+0xa1b/0x27e0 [ 77.525473][ T5071] ? __pfx_do_exit+0x10/0x10 [ 77.530099][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.534956][ T5071] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 77.540943][ T5071] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.547305][ T5071] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.552516][ T5071] ? srso_return_thunk+0x5/0x5f [ 77.557370][ T5071] ? lockdep_hardirqs_on+0x99/0x150 [ 77.562573][ T5071] do_group_exit+0x207/0x2c0 [ 77.567177][ T5071] __x64_sys_exit_group+0x3f/0x40 [ 77.572204][ T5071] do_syscall_64+0xfd/0x240 [ 77.576708][ T5071] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 77.582607][ T5071] RIP: 0033:0x7fa80e0f4cb9 [ 77.587012][ T5071] Code: Unable to access opcode bytes at 0x7fa80e0f4c8f. [ 77.594020][ T5071] RSP: 002b:00007ffc2c611288 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 +++ exited with 0 +++ [ 77.602451][ T5071] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007