[info] Using makefile-style concurrent boot in runlevel 2. [ 13.998251][ 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 '10.128.15.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 388.811991][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 388.902027][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 389.021937][ T12] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 389.030003][ T12] usb 1-1: config 0 has no interface number 0 [ 389.036166][ T12] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 389.045216][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 389.058594][ T12] usb 1-1: config 0 descriptor?? [ 389.107579][ T12] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 389.311922][ T12] snd_usb_pod 1-1:0.1: set_interface failed [ 389.318026][ T12] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now disconnected [ 389.325477][ T12] snd_usb_pod: probe of 1-1:0.1 failed with error -71 [ 389.334038][ T12] usb 1-1: USB disconnect, device number 2 [ 389.891855][ T12] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 389.981938][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 390.101877][ T12] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 390.109887][ T12] usb 1-1: config 0 has no interface number 0 [ 390.116088][ T12] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 390.125327][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 390.134758][ T12] usb 1-1: config 0 descriptor?? [ 390.174015][ T12] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 390.392577][ T12] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now attached [ 391.048226][ T1806] udc-core: couldn't find an available UDC or it's busy [ 391.055321][ T1806] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 391.064690][ T83] usb 1-1: USB disconnect, device number 3 [ 540.513206][ C1] watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor955:1806] [ 540.522048][ C1] Modules linked in: [ 540.525931][ C1] irq event stamp: 30226 [ 540.530258][ C1] hardirqs last enabled at (30225): [] trace_hardirqs_on_thunk+0x1a/0x1c [ 540.540327][ C1] hardirqs last disabled at (30226): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 540.550555][ C1] softirqs last enabled at (382): [] __do_softirq+0x673/0x950 [ 540.559721][ C1] softirqs last disabled at (373): [] irq_exit+0x178/0x1a0 [ 540.569168][ C1] CPU: 1 PID: 1806 Comm: syz-executor955 Not tainted 5.6.0-rc3-syzkaller #0 [ 540.577822][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 540.587940][ C1] RIP: 0010:smp_call_function_single+0x2cf/0x3a0 [ 540.594261][ C1] Code: 5f 5d c3 e8 83 64 0a 00 48 8b 54 24 08 4c 89 f9 8b 7c 24 14 48 8d 74 24 40 e8 cd f9 ff ff 41 89 c4 eb 07 e8 63 64 0a 00 f3 90 <8b> 5c 24 58 31 ff 83 e3 01 89 de e8 c1 65 0a 00 85 db 75 e5 e8 48 [ 540.613855][ C1] RSP: 0018:ffff8881cd03f7c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 540.622256][ C1] RAX: ffff8881cda48000 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 540.630219][ C1] RDX: 0000000000000000 RSI: ffffffff8134f88d RDI: 0000000000000005 [ 540.638182][ C1] RBP: ffff8881cd03f898 R08: ffff8881cda48000 R09: 0000000000000000 [ 540.646141][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 540.654101][ C1] R13: 0000000000000001 R14: ffff8881cea37440 R15: ffff8881db333dc0 [ 540.662065][ C1] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 540.670988][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 540.677563][ C1] CR2: 00007fecd12f4000 CR3: 0000000007021000 CR4: 00000000001406e0 [ 540.685525][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 540.693485][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 540.701453][ C1] Call Trace: [ 540.704820][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.711439][ C1] ? generic_exec_single+0x370/0x370 [ 540.716737][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.723322][ C1] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 540.729294][ C1] smp_call_function_many_cond+0x25e/0x900 [ 540.735111][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.741602][ C1] ? native_flush_tlb_others+0x3c9/0x4b0 [ 540.747225][ C1] flush_tlb_mm_range+0x1e8/0x3e0 [ 540.752312][ C1] tlb_flush_mmu+0x274/0x630 [ 540.756900][ C1] tlb_finish_mmu+0x93/0x420 [ 540.761479][ C1] exit_mmap+0x298/0x4d0 [ 540.765709][ C1] ? __ia32_sys_munmap+0x80/0x80 [ 540.770639][ C1] mmput+0xce/0x3d0 [ 540.774440][ C1] do_exit+0xaa0/0x2c50 [ 540.778622][ C1] ? find_held_lock+0x2d/0x110 [ 540.783389][ C1] ? mm_update_next_owner+0x7a0/0x7a0 [ 540.788746][ C1] ? lock_downgrade+0x6e0/0x6e0 [ 540.793587][ C1] do_group_exit+0x125/0x340 [ 540.798195][ C1] get_signal+0x480/0x2470 [ 540.802624][ C1] do_signal+0x88/0x1490 [ 540.806869][ C1] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 540.812663][ C1] ? lockdep_hardirqs_on+0x382/0x580 [ 540.817938][ C1] ? setup_sigcontext+0x820/0x820 [ 540.823009][ C1] ? raw_ioctl+0x193/0x1a70 [ 540.827554][ C1] ? ksys_dup3+0x3c0/0x3c0 [ 540.831960][ C1] ? raw_open+0x470/0x470 [ 540.836283][ C1] exit_to_usermode_loop+0x1a2/0x200 [ 540.841554][ C1] do_syscall_64+0x4e0/0x5a0 [ 540.846131][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 540.852010][ C1] RIP: 0033:0x449f67 [ 540.855965][ C1] Code: Bad RIP value. [ 540.860031][ C1] RSP: 002b:00007f6d6e95d4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 540.868436][ C1] RAX: fffffffffffffffc RBX: 0000000000000004 RCX: 0000000000449f67 [ 540.876417][ C1] RDX: 00007f6d6e95d930 RSI: 0000000080085502 RDI: 0000000000000004 [ 540.884379][ C1] RBP: 00007f6d6e95d528 R08: 0000000000000000 R09: 000000000000000b [ 540.892342][ C1] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000036 [ 540.900300][ C1] R13: 000000000000009f R14: 000000000000b1ee R15: 00000000000000e7 [ 540.908266][ C1] Sending NMI from CPU 1 to CPUs 0: [ 540.914493][ C1] NMI backtrace for cpu 0 [ 540.914498][ C1] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc3-syzkaller #0 [ 540.914505][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 540.914509][ C1] RIP: 0010:check_memory_region+0x0/0x1c0 [ 540.914520][ C1] Code: 00 00 e9 b3 61 25 04 0f 1f 00 48 89 f2 be f5 00 00 00 e9 a3 61 25 04 0f 1f 00 48 89 f2 be f8 00 00 00 e9 93 61 25 04 0f 1f 00 <48> 85 f6 0f 84 50 01 00 00 41 54 0f b6 d2 55 53 e9 b6 00 00 00 48 [ 540.914524][ C1] RSP: 0018:ffff8881db2099c0 EFLAGS: 00000046 [ 540.914532][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff84ba0d82 [ 540.914537][ C1] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8881d54b6e01 [ 540.914542][ C1] RBP: ffff8881d54b6e01 R08: ffffffff8702cc40 R09: ffffed103aa96dc1 [ 540.914547][ C1] R10: ffffed103aa96dc0 R11: ffff8881d54b6e00 R12: 0000000000000000 [ 540.914552][ C1] R13: ffff8881cdf1203a R14: 00000000000003c6 R15: 0000000000000001 [ 540.914558][ C1] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 540.914562][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 540.914567][ C1] CR2: 00007fecd12f4000 CR3: 00000001c65c9000 CR4: 00000000001406f0 [ 540.914573][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 540.914578][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 540.914580][ C1] Call Trace: [ 540.914583][ C1] [ 540.914586][ C1] memcpy+0x35/0x50 [ 540.914589][ C1] line6_midibuf_read+0x492/0xa30 [ 540.914593][ C1] line6_data_received+0x318/0x520 [ 540.914596][ C1] ? device_id_show+0x80/0x80 [ 540.914600][ C1] __usb_hcd_giveback_urb+0x1f2/0x470 [ 540.914604][ C1] usb_hcd_giveback_urb+0x368/0x420 [ 540.914607][ C1] dummy_timer+0x1258/0x32ae [ 540.914611][ C1] ? dummy_udc_probe+0x930/0x930 [ 540.914615][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.914618][ C1] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.914622][ C1] call_timer_fn+0x195/0x6f0 [ 540.914625][ C1] ? dummy_udc_probe+0x930/0x930 [ 540.914629][ C1] ? msleep_interruptible+0x130/0x130 [ 540.914633][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.914637][ C1] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.914641][ C1] ? _raw_spin_unlock_irq+0x1f/0x30 [ 540.914644][ C1] ? dummy_udc_probe+0x930/0x930 [ 540.914648][ C1] run_timer_softirq+0x5f9/0x1500 [ 540.914651][ C1] ? add_timer+0x7a0/0x7a0 [ 540.914655][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.914659][ C1] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.914662][ C1] __do_softirq+0x21e/0x950 [ 540.914665][ C1] irq_exit+0x178/0x1a0 [ 540.914669][ C1] smp_apic_timer_interrupt+0x141/0x540 [ 540.914672][ C1] apic_timer_interrupt+0xf/0x20 [ 540.914675][ C1] [ 540.914679][ C1] RIP: 0010:default_idle+0x28/0x300 [ 540.914690][ C1] 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 [ 540.914694][ C1] RSP: 0018:ffffffff87007d80 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 540.914703][ C1] RAX: 0000000000000007 RBX: ffffffff8702cc40 RCX: 0000000000000000 [ 540.914708][ C1] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff8702d48c [ 540.914713][ C1] RBP: fffffbfff0e05988 R08: ffffffff8702cc40 R09: 0000000000000000 [ 540.914718][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 540.914723][ C1] R13: 0000000000000000 R14: ffffffff87e60000 R15: 0000000000000000 [ 540.914727][ C1] do_idle+0x3e0/0x500 [ 540.914730][ C1] ? arch_cpu_idle_exit+0x40/0x40 [ 540.914733][ C1] ? schedule+0xe1/0x2b0 [ 540.914737][ C1] cpu_startup_entry+0x14/0x20 [ 540.914740][ C1] start_kernel+0xde3/0xe27 [ 540.914743][ C1] ? mem_encrypt_init+0x5/0x5 [ 540.914747][ C1] ? x86_family+0x3d/0x50 [ 540.914750][ C1] ? load_ucode_bsp+0x23d/0x27d [ 540.914754][ C1] secondary_startup_64+0xb6/0xc0 [ 540.914762][ C1] Kernel panic - not syncing: softlockup: hung tasks [ 541.302130][ C1] CPU: 1 PID: 1806 Comm: syz-executor955 Tainted: G L 5.6.0-rc3-syzkaller #0 [ 541.312177][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 541.322342][ C1] Call Trace: [ 541.325622][ C1] [ 541.328472][ C1] dump_stack+0xef/0x16e [ 541.332706][ C1] panic+0x2aa/0x6e1 [ 541.336590][ C1] ? add_taint.cold+0x16/0x16 [ 541.341270][ C1] ? cpumask_next+0x3c/0x40 [ 541.345842][ C1] ? printk_safe_flush+0xd9/0x120 [ 541.350900][ C1] ? watchdog_timer_fn.cold+0xee/0x134 [ 541.356360][ C1] ? watchdog_timer_fn.cold+0xe5/0x134 [ 541.361814][ C1] watchdog_timer_fn.cold+0xff/0x134 [ 541.367096][ C1] __hrtimer_run_queues+0x32c/0xd20 [ 541.372289][ C1] ? lockup_detector_update_enable+0x90/0x90 [ 541.378272][ C1] ? hrtimer_init+0x2e0/0x2e0 [ 541.382974][ C1] ? ktime_get_update_offsets_now+0x24c/0x320 [ 541.389033][ C1] hrtimer_interrupt+0x2e8/0x730 [ 541.393964][ C1] smp_apic_timer_interrupt+0xfe/0x540 [ 541.399430][ C1] apic_timer_interrupt+0xf/0x20 [ 541.404367][ C1] [ 541.407302][ C1] RIP: 0010:smp_call_function_single+0x2cf/0x3a0 [ 541.413630][ C1] Code: 5f 5d c3 e8 83 64 0a 00 48 8b 54 24 08 4c 89 f9 8b 7c 24 14 48 8d 74 24 40 e8 cd f9 ff ff 41 89 c4 eb 07 e8 63 64 0a 00 f3 90 <8b> 5c 24 58 31 ff 83 e3 01 89 de e8 c1 65 0a 00 85 db 75 e5 e8 48 [ 541.433234][ C1] RSP: 0018:ffff8881cd03f7c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 541.441639][ C1] RAX: ffff8881cda48000 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 541.449603][ C1] RDX: 0000000000000000 RSI: ffffffff8134f88d RDI: 0000000000000005 [ 541.457565][ C1] RBP: ffff8881cd03f898 R08: ffff8881cda48000 R09: 0000000000000000 [ 541.465529][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 541.473489][ C1] R13: 0000000000000001 R14: ffff8881cea37440 R15: ffff8881db333dc0 [ 541.481481][ C1] ? smp_call_function_single+0x2df/0x3a0 [ 541.487192][ C1] ? smp_call_function_single+0x2cd/0x3a0 [ 541.492908][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.499482][ C1] ? generic_exec_single+0x370/0x370 [ 541.504759][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.511267][ C1] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 541.517150][ C1] smp_call_function_many_cond+0x25e/0x900 [ 541.522951][ C1] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.529439][ C1] ? native_flush_tlb_others+0x3c9/0x4b0 [ 541.535059][ C1] flush_tlb_mm_range+0x1e8/0x3e0 [ 541.540076][ C1] tlb_flush_mmu+0x274/0x630 [ 541.544653][ C1] tlb_finish_mmu+0x93/0x420 [ 541.549245][ C1] exit_mmap+0x298/0x4d0 [ 541.553475][ C1] ? __ia32_sys_munmap+0x80/0x80 [ 541.558404][ C1] mmput+0xce/0x3d0 [ 541.562201][ C1] do_exit+0xaa0/0x2c50 [ 541.566348][ C1] ? find_held_lock+0x2d/0x110 [ 541.571103][ C1] ? mm_update_next_owner+0x7a0/0x7a0 [ 541.576462][ C1] ? lock_downgrade+0x6e0/0x6e0 [ 541.581300][ C1] do_group_exit+0x125/0x340 [ 541.585877][ C1] get_signal+0x480/0x2470 [ 541.590282][ C1] do_signal+0x88/0x1490 [ 541.594532][ C1] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 541.600338][ C1] ? lockdep_hardirqs_on+0x382/0x580 [ 541.605612][ C1] ? setup_sigcontext+0x820/0x820 [ 541.610624][ C1] ? raw_ioctl+0x193/0x1a70 [ 541.615115][ C1] ? ksys_dup3+0x3c0/0x3c0 [ 541.619518][ C1] ? raw_open+0x470/0x470 [ 541.623851][ C1] exit_to_usermode_loop+0x1a2/0x200 [ 541.629140][ C1] do_syscall_64+0x4e0/0x5a0 [ 541.633740][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 541.639620][ C1] RIP: 0033:0x449f67 [ 541.643516][ C1] Code: Bad RIP value. [ 541.647570][ C1] RSP: 002b:00007f6d6e95d4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 541.655979][ C1] RAX: fffffffffffffffc RBX: 0000000000000004 RCX: 0000000000449f67 [ 541.663965][ C1] RDX: 00007f6d6e95d930 RSI: 0000000080085502 RDI: 0000000000000004 [ 541.671925][ C1] RBP: 00007f6d6e95d528 R08: 0000000000000000 R09: 000000000000000b [ 541.679886][ C1] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000036 [ 541.687848][ C1] R13: 000000000000009f R14: 000000000000b1ee R15: 00000000000000e7 [ 542.798987][ C1] Shutting down cpus with NMI [ 542.804299][ C1] Kernel Offset: disabled [ 542.808740][ C1] Rebooting in 86400 seconds..