[info] Using makefile-style concurrent boot in runlevel 2. [ 14.246779][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.193' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 376.799473][ T94] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 376.889560][ T94] usb 1-1: Using ep0 maxpacket: 32 [ 377.009443][ T94] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 377.017581][ T94] usb 1-1: config 0 has no interface number 0 [ 377.023968][ T94] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 377.033668][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 377.047557][ T94] usb 1-1: config 0 descriptor?? [ 377.097631][ T94] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 377.299370][ T94] snd_usb_pod 1-1:0.1: set_interface failed [ 377.305611][ T94] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now disconnected [ 377.313155][ T94] snd_usb_pod: probe of 1-1:0.1 failed with error -71 [ 377.321308][ T94] usb 1-1: USB disconnect, device number 2 [ 377.889310][ T94] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 377.979384][ T94] usb 1-1: Using ep0 maxpacket: 32 [ 378.099454][ T94] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 378.107511][ T94] usb 1-1: config 0 has no interface number 0 [ 378.113827][ T94] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 378.122939][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 378.132289][ T94] usb 1-1: config 0 descriptor?? [ 378.171397][ T94] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 378.379931][ T94] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now attached [ 378.880846][ T1800] udc-core: couldn't find an available UDC or it's busy [ 378.887873][ T1800] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 378.897209][ T95] usb 1-1: USB disconnect, device number 3 [ 518.829931][ C0] watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor005:1800] [ 518.838862][ C0] Modules linked in: [ 518.842746][ C0] irq event stamp: 141182 [ 518.847186][ C0] hardirqs last enabled at (141181): [] trace_hardirqs_on_thunk+0x1a/0x1c [ 518.857324][ C0] hardirqs last disabled at (141182): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 518.867609][ C0] softirqs last enabled at (141180): [] __do_softirq+0x673/0x950 [ 518.877017][ C0] softirqs last disabled at (141173): [] irq_exit+0x178/0x1a0 [ 518.886734][ C0] CPU: 0 PID: 1800 Comm: syz-executor005 Not tainted 5.6.0-rc3-syzkaller #0 [ 518.895405][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 518.905584][ C0] RIP: 0010:write_comp_data+0x68/0x70 [ 518.910955][ C0] Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 0f 1f 80 00 00 00 00 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 31 ff [ 518.930552][ C0] RSP: 0018:ffff8881cd57f7b8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 518.938957][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 518.946935][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 [ 518.954914][ C0] RBP: ffff8881cd57f898 R08: ffff8881cfdd6200 R09: 0000000000000000 [ 518.962877][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 518.970841][ C0] R13: 0000000000000000 R14: ffff8881cded53c0 R15: ffff8881db233dc0 [ 518.978805][ C0] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 518.987724][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 518.994299][ C0] CR2: 00007fb39f139000 CR3: 0000000007021000 CR4: 00000000001406f0 [ 519.002264][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 519.010248][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 519.018205][ C0] Call Trace: [ 519.021536][ C0] smp_call_function_single+0x2df/0x3a0 [ 519.027156][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.033648][ C0] ? generic_exec_single+0x370/0x370 [ 519.038930][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.045547][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 519.051660][ C0] smp_call_function_many_cond+0x25e/0x900 [ 519.057471][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.064001][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 519.069632][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 519.074762][ C0] tlb_flush_mmu+0x274/0x630 [ 519.079346][ C0] tlb_finish_mmu+0x93/0x420 [ 519.083929][ C0] exit_mmap+0x298/0x4d0 [ 519.088161][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 519.093086][ C0] mmput+0xce/0x3d0 [ 519.096884][ C0] do_exit+0xaa0/0x2c50 [ 519.101081][ C0] ? find_held_lock+0x2d/0x110 [ 519.105835][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 519.111195][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 519.116035][ C0] do_group_exit+0x125/0x340 [ 519.120689][ C0] get_signal+0x480/0x2470 [ 519.125143][ C0] do_signal+0x88/0x1490 [ 519.129397][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 519.135210][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 519.140500][ C0] ? setup_sigcontext+0x820/0x820 [ 519.145605][ C0] ? raw_ioctl+0x193/0x1a70 [ 519.150201][ C0] ? ksys_dup3+0x3c0/0x3c0 [ 519.154606][ C0] ? raw_open+0x470/0x470 [ 519.158939][ C0] exit_to_usermode_loop+0x1a2/0x200 [ 519.164222][ C0] do_syscall_64+0x4e0/0x5a0 [ 519.168846][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 519.174742][ C0] RIP: 0033:0x449f67 [ 519.178714][ C0] Code: Bad RIP value. [ 519.182775][ C0] RSP: 002b:00007fada70b24f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 519.191185][ C0] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000449f67 [ 519.199268][ C0] RDX: 00007fada70b2930 RSI: 0000000080085502 RDI: 0000000000000003 [ 519.207239][ C0] RBP: 00007fada70b2528 R08: 0000000000000000 R09: 000000000000000b [ 519.215216][ C0] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000036 [ 519.223185][ C0] R13: 000000000000009f R14: 000000000000b1ee R15: 00000000000000e7 [ 519.231156][ C0] Sending NMI from CPU 0 to CPUs 1: [ 519.237390][ C0] NMI backtrace for cpu 1 [ 519.237396][ C0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc3-syzkaller #0 [ 519.237402][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 519.237406][ C0] RIP: 0010:line6_data_received+0x35e/0x520 [ 519.237417][ C0] Code: b6 06 84 c0 74 08 3c 03 0f 8e 27 01 00 00 44 89 7d 58 80 3b 00 0f 85 29 01 00 00 48 8b 75 50 48 89 ef 44 89 fa e8 82 34 00 00 <48> 8d bd e0 21 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 0f [ 519.237421][ C0] RSP: 0018:ffff8881db309a50 EFLAGS: 00000006 [ 519.237429][ C0] RAX: ffff8881da213100 RBX: ffffed103a1229c4 RCX: ffffffff84b9cb64 [ 519.237434][ C0] RDX: 0000000000000100 RSI: ffffffff84b9cb9e RDI: ffff8881d4d8a408 [ 519.237439][ C0] RBP: ffff8881d0914dd0 R08: ffff8881da213100 R09: ffffed103a9b1701 [ 519.237444][ C0] R10: ffffed103a9b1700 R11: ffff8881d4d8b800 R12: ffff8881d4d8a4a0 [ 519.237449][ C0] R13: dffffc0000000000 R14: ffffed103a1229c5 R15: 0000000000000001 [ 519.237455][ C0] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 519.237460][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 519.237465][ C0] CR2: 0000000020001800 CR3: 00000001d0ac9000 CR4: 00000000001406e0 [ 519.237470][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 519.237475][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 519.237478][ C0] Call Trace: [ 519.237480][ C0] [ 519.237484][ C0] ? device_id_show+0x80/0x80 [ 519.237487][ C0] __usb_hcd_giveback_urb+0x1f2/0x470 [ 519.237491][ C0] usb_hcd_giveback_urb+0x368/0x420 [ 519.237494][ C0] dummy_timer+0x1258/0x32ae [ 519.237498][ C0] ? dummy_udc_probe+0x930/0x930 [ 519.237502][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 519.237506][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 519.237509][ C0] call_timer_fn+0x195/0x6f0 [ 519.237513][ C0] ? dummy_udc_probe+0x930/0x930 [ 519.237517][ C0] ? msleep_interruptible+0x130/0x130 [ 519.237520][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 519.237524][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 519.237528][ C0] ? _raw_spin_unlock_irq+0x1f/0x30 [ 519.237531][ C0] ? dummy_udc_probe+0x930/0x930 [ 519.237535][ C0] run_timer_softirq+0x5f9/0x1500 [ 519.237538][ C0] ? add_timer+0x7a0/0x7a0 [ 519.237542][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 519.237546][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 519.237549][ C0] __do_softirq+0x21e/0x950 [ 519.237552][ C0] irq_exit+0x178/0x1a0 [ 519.237556][ C0] smp_apic_timer_interrupt+0x141/0x540 [ 519.237560][ C0] apic_timer_interrupt+0xf/0x20 [ 519.237562][ C0] [ 519.237566][ C0] RIP: 0010:default_idle+0x28/0x300 [ 519.237577][ C0] Code: cc cc 41 56 41 55 65 44 8b 2d 94 c9 72 7a 41 54 55 53 0f 1f 44 00 00 e8 16 bb b5 fb e9 07 00 00 00 0f 00 2d 3a 5f 53 00 fb f4 <65> 44 8b 2d 70 c9 72 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 [ 519.237581][ C0] RSP: 0018:ffff8881da22fda8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 519.237590][ C0] RAX: 0000000000000007 RBX: ffff8881da213100 RCX: 0000000000000000 [ 519.237595][ C0] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da21394c [ 519.237600][ C0] RBP: ffffed103b442620 R08: ffff8881da213100 R09: 0000000000000000 [ 519.237605][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 519.237610][ C0] R13: 0000000000000001 R14: ffffffff87e60000 R15: 0000000000000000 [ 519.237614][ C0] ? default_idle+0x1a/0x300 [ 519.237617][ C0] do_idle+0x3e0/0x500 [ 519.237621][ C0] ? arch_cpu_idle_exit+0x40/0x40 [ 519.237624][ C0] cpu_startup_entry+0x14/0x20 [ 519.237627][ C0] start_secondary+0x2a4/0x390 [ 519.237631][ C0] ? set_cpu_sibling_map+0x1e90/0x1e90 [ 519.237635][ C0] secondary_startup_64+0xb6/0xc0 [ 519.237642][ C0] Kernel panic - not syncing: softlockup: hung tasks [ 519.604420][ C0] CPU: 0 PID: 1800 Comm: syz-executor005 Tainted: G L 5.6.0-rc3-syzkaller #0 [ 519.614463][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 519.624504][ C0] Call Trace: [ 519.627780][ C0] [ 519.630672][ C0] dump_stack+0xef/0x16e [ 519.634921][ C0] panic+0x2aa/0x6e1 [ 519.638819][ C0] ? add_taint.cold+0x16/0x16 [ 519.643636][ C0] ? cpumask_next+0x3c/0x40 [ 519.648225][ C0] ? printk_safe_flush+0xd9/0x120 [ 519.653254][ C0] ? watchdog_timer_fn.cold+0xee/0x134 [ 519.658721][ C0] ? watchdog_timer_fn.cold+0xe5/0x134 [ 519.664200][ C0] watchdog_timer_fn.cold+0xff/0x134 [ 519.669487][ C0] __hrtimer_run_queues+0x32c/0xd20 [ 519.674708][ C0] ? lockup_detector_update_enable+0x90/0x90 [ 519.680684][ C0] ? hrtimer_init+0x2e0/0x2e0 [ 519.685413][ C0] ? ktime_get_update_offsets_now+0x24c/0x320 [ 519.691494][ C0] hrtimer_interrupt+0x2e8/0x730 [ 519.696432][ C0] smp_apic_timer_interrupt+0xfe/0x540 [ 519.701890][ C0] apic_timer_interrupt+0xf/0x20 [ 519.706814][ C0] [ 519.709749][ C0] RIP: 0010:write_comp_data+0x68/0x70 [ 519.715117][ C0] Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 0f 1f 80 00 00 00 00 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 31 ff [ 519.734740][ C0] RSP: 0018:ffff8881cd57f7b8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 519.743151][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 519.751112][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 [ 519.759091][ C0] RBP: ffff8881cd57f898 R08: ffff8881cfdd6200 R09: 0000000000000000 [ 519.767172][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 519.775156][ C0] R13: 0000000000000000 R14: ffff8881cded53c0 R15: ffff8881db233dc0 [ 519.783141][ C0] ? smp_call_function_single+0x2df/0x3a0 [ 519.788852][ C0] smp_call_function_single+0x2df/0x3a0 [ 519.794398][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.800888][ C0] ? generic_exec_single+0x370/0x370 [ 519.806161][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.812653][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 519.818551][ C0] smp_call_function_many_cond+0x25e/0x900 [ 519.824377][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 519.830880][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 519.836513][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 519.841533][ C0] tlb_flush_mmu+0x274/0x630 [ 519.846137][ C0] tlb_finish_mmu+0x93/0x420 [ 519.850757][ C0] exit_mmap+0x298/0x4d0 [ 519.855016][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 519.859950][ C0] mmput+0xce/0x3d0 [ 519.863754][ C0] do_exit+0xaa0/0x2c50 [ 519.867909][ C0] ? find_held_lock+0x2d/0x110 [ 519.872684][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 519.878067][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 519.882913][ C0] do_group_exit+0x125/0x340 [ 519.887520][ C0] get_signal+0x480/0x2470 [ 519.891952][ C0] do_signal+0x88/0x1490 [ 519.896195][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 519.902004][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 519.907456][ C0] ? setup_sigcontext+0x820/0x820 [ 519.912573][ C0] ? raw_ioctl+0x193/0x1a70 [ 519.917065][ C0] ? ksys_dup3+0x3c0/0x3c0 [ 519.921472][ C0] ? raw_open+0x470/0x470 [ 519.925797][ C0] exit_to_usermode_loop+0x1a2/0x200 [ 519.931074][ C0] do_syscall_64+0x4e0/0x5a0 [ 519.935851][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 519.941733][ C0] RIP: 0033:0x449f67 [ 519.945634][ C0] Code: Bad RIP value. [ 519.949703][ C0] RSP: 002b:00007fada70b24f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 519.958122][ C0] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000449f67 [ 519.966092][ C0] RDX: 00007fada70b2930 RSI: 0000000080085502 RDI: 0000000000000003 [ 519.974059][ C0] RBP: 00007fada70b2528 R08: 0000000000000000 R09: 000000000000000b [ 519.982023][ C0] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000036 [ 519.989988][ C0] R13: 000000000000009f R14: 000000000000b1ee R15: 00000000000000e7 [ 521.095383][ C0] Shutting down cpus with NMI [ 521.100875][ C0] Kernel Offset: disabled [ 521.105255][ C0] Rebooting in 86400 seconds..