forked to background, child pid 3180 no interfaces have a carri[ 23.309846][ T3181] 8021q: adding VLAN 0 to HW filter on device bond0 er [ 23.332474][ T3181] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.572411][ C0] [ 42.574861][ C0] ============================================ [ 42.580997][ C0] WARNING: possible recursive locking detected [ 42.587137][ C0] 5.16.0-rc6-syzkaller #0 Not tainted [ 42.593134][ C0] -------------------------------------------- [ 42.599702][ C0] swapper/0/0 is trying to acquire lock: [ 42.605784][ C0] ffff888011fc3130 (&runtime->sleep){..-.}-{2:2}, at: io_poll_double_wake+0x2be/0x820 [ 42.615598][ C0] [ 42.615598][ C0] but task is already holding lock: [ 42.623556][ C0] ffff888015d71130 (&runtime->sleep){..-.}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 [ 42.633302][ C0] [ 42.633302][ C0] other info that might help us debug this: [ 42.641362][ C0] Possible unsafe locking scenario: [ 42.641362][ C0] [ 42.648814][ C0] CPU0 [ 42.652080][ C0] ---- [ 42.655336][ C0] lock(&runtime->sleep); [ 42.659820][ C0] lock(&runtime->sleep); [ 42.664213][ C0] [ 42.664213][ C0] *** DEADLOCK *** [ 42.664213][ C0] [ 42.672601][ C0] May be due to missing lock nesting notation [ 42.672601][ C0] [ 42.680903][ C0] 2 locks held by swapper/0/0: [ 42.685674][ C0] #0: ffff88814a2e2110 (&group->lock){..-.}-{2:2}, at: _snd_pcm_stream_lock_irqsave+0x9f/0xd0 [ 42.697079][ C0] #1: ffff888015d71130 (&runtime->sleep){..-.}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 [ 42.707162][ C0] [ 42.707162][ C0] stack backtrace: [ 42.713032][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-rc6-syzkaller #0 [ 42.720992][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.731032][ C0] Call Trace: [ 42.734302][ C0] [ 42.737126][ C0] dump_stack_lvl+0xcd/0x134 [ 42.741733][ C0] __lock_acquire.cold+0x149/0x3ab [ 42.746860][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 42.752837][ C0] ? lockdep_unlock+0x11c/0x290 [ 42.757895][ C0] lock_acquire+0x1ab/0x510 [ 42.762491][ C0] ? io_poll_double_wake+0x2be/0x820 [ 42.767873][ C0] ? lock_release+0x720/0x720 [ 42.772654][ C0] ? __lock_acquire+0x162f/0x54a0 [ 42.777665][ C0] _raw_spin_lock_irqsave+0x39/0x50 [ 42.783026][ C0] ? io_poll_double_wake+0x2be/0x820 [ 42.788758][ C0] io_poll_double_wake+0x2be/0x820 [ 42.794191][ C0] __wake_up_common+0x147/0x650 [ 42.799119][ C0] __wake_up_common_lock+0xd0/0x130 [ 42.804388][ C0] ? __wake_up_common+0x650/0x650 [ 42.809400][ C0] ? lockdep_unlock+0x11c/0x290 [ 42.814266][ C0] ? snd_pcm_hw_rule_ratdens+0xc50/0xc50 [ 42.819906][ C0] snd_pcm_update_state+0x46a/0x540 [ 42.825099][ C0] snd_pcm_update_hw_ptr0+0xa75/0x1a50 [ 42.830934][ C0] ? lock_release+0x720/0x720 [ 42.835610][ C0] ? snd_pcm_update_state+0x540/0x540 [ 42.841055][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 42.846065][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 42.850996][ C0] ? __hrtimer_run_queues+0x51a/0xe50 [ 42.856786][ C0] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 42.862628][ C0] ? dummy_pcm_copy_kernel+0x10/0x10 [ 42.868122][ C0] snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 [ 42.875235][ C0] snd_pcm_period_elapsed+0x28/0x50 [ 42.880838][ C0] dummy_hrtimer_callback+0x94/0x1b0 [ 42.886839][ C0] __hrtimer_run_queues+0x609/0xe50 [ 42.892594][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 42.898561][ C0] ? ktime_get_update_offsets_now+0x3eb/0x5c0 [ 42.904608][ C0] hrtimer_run_softirq+0x17b/0x360 [ 42.910174][ C0] __do_softirq+0x29b/0x9c2 [ 42.915269][ C0] __irq_exit_rcu+0x123/0x180 [ 42.921082][ C0] irq_exit_rcu+0x5/0x20 [ 42.925399][ C0] sysvec_apic_timer_interrupt+0x93/0xc0 [ 42.931018][ C0] [ 42.933931][ C0] [ 42.936843][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 42.942914][ C0] RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 [ 42.948727][ C0] Code: 89 de e8 7d 6d 2f f8 84 db 75 ac e8 94 69 2f f8 e8 df ad 35 f8 eb 0c e8 88 69 2f f8 0f 00 2d 61 e2 c8 00 e8 7c 69 2f f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 f7 6b 2f f8 48 85 db [ 42.968515][ C0] RSP: 0018:ffffffff8b807d60 EFLAGS: 00000293 [ 42.976738][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 42.984930][ C0] RDX: ffffffff8b8bc6c0 RSI: ffffffff894838c4 RDI: 0000000000000000 [ 42.993021][ C0] RBP: ffff888142ffb064 R08: 0000000000000001 R09: 0000000000000001 [ 43.001160][ C0] R10: ffffffff817de6c8 R11: 0000000000000000 R12: 0000000000000001 [ 43.009119][ C0] R13: ffff888142ffb000 R14: ffff888142ffb064 R15: ffff888018ab0004 [ 43.017715][ C0] ? trace_hardirqs_on+0x38/0x1c0 [ 43.022915][ C0] ? acpi_idle_do_entry+0x1c4/0x250 [ 43.028111][ C0] acpi_idle_enter+0x361/0x500 [ 43.033043][ C0] cpuidle_enter_state+0x1b1/0xc80 [ 43.038142][ C0] cpuidle_enter+0x4a/0xa0 [ 43.043166][ C0] do_idle+0x3e8/0x590 [ 43.047236][ C0] ? arch_cpu_idle_exit+0x30/0x30 [ 43.052251][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 43.058490][ C0] cpu_startup_entry+0x14/0x20 [ 43.063309][ C0] start_kernel+0x47a/0x49b [ 43.067796][ C0] secondary_startup_64_no_verify+0xb0/0xbb [ 43.073