[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 14.007752][ C1] random: crng init done [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 401.082694][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 401.172856][ T83] usb 1-1: Using ep0 maxpacket: 32 [ 401.293197][ T83] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 401.301280][ T83] usb 1-1: config 0 has no interface number 0 [ 401.307771][ T83] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 401.317117][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 401.331123][ T83] usb 1-1: config 0 descriptor?? [ 401.379869][ T83] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 401.582729][ T83] snd_usb_pod 1-1:0.1: set_interface failed [ 401.588930][ T83] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now disconnected [ 401.596789][ T83] snd_usb_pod: probe of 1-1:0.1 failed with error -71 [ 401.606051][ T83] usb 1-1: USB disconnect, device number 2 [ 402.173026][ T83] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 402.262703][ T83] usb 1-1: Using ep0 maxpacket: 32 [ 402.382666][ T83] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 402.390667][ T83] usb 1-1: config 0 has no interface number 0 [ 402.397909][ T83] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 402.407074][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 402.417001][ T83] usb 1-1: config 0 descriptor?? [ 402.454884][ T83] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 402.663501][ T83] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now attached [ 403.320959][ T1801] udc-core: couldn't find an available UDC or it's busy [ 403.328344][ T1801] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 403.337137][ T95] usb 1-1: USB disconnect, device number 3 [ 540.074026][ C0] watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz-executor596:1796] [ 540.082883][ C0] Modules linked in: [ 540.086781][ C0] irq event stamp: 147150 [ 540.091315][ C0] hardirqs last enabled at (147149): [] trace_hardirqs_on_thunk+0x1a/0x1c [ 540.101465][ C0] hardirqs last disabled at (147150): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 540.111816][ C0] softirqs last enabled at (147148): [] __do_softirq+0x673/0x950 [ 540.121221][ C0] softirqs last disabled at (147141): [] irq_exit+0x178/0x1a0 [ 540.130933][ C0] CPU: 0 PID: 1796 Comm: syz-executor596 Not tainted 5.6.0-rc5-syzkaller #0 [ 540.139602][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 540.149785][ C0] RIP: 0010:smp_call_function_single+0x2cf/0x3a0 [ 540.156117][ C0] Code: 5f 5d c3 e8 53 62 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 33 62 0a 00 f3 90 <8b> 5c 24 58 31 ff 83 e3 01 89 de e8 c1 63 0a 00 85 db 75 e5 e8 18 [ 540.175727][ C0] RSP: 0018:ffff8881c6b87a20 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 540.184136][ C0] RAX: ffff8881cdf23100 RBX: 0000000000000001 RCX: ffffffff8134f3bf [ 540.192102][ C0] RDX: 0000000000000000 RSI: ffffffff8134f3ad RDI: 0000000000000005 [ 540.200081][ C0] RBP: ffff8881c6b87af0 R08: ffff8881cdf23100 R09: 0000000000000000 [ 540.208053][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 540.216046][ C0] R13: 0000000000000000 R14: ffff8881cda8c040 R15: ffff8881db233e00 [ 540.224026][ C0] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 540.232951][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 540.239531][ C0] CR2: 00007f9ad481a000 CR3: 0000000007021000 CR4: 00000000001406f0 [ 540.247506][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 540.255471][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 540.263432][ C0] Call Trace: [ 540.266809][ C0] ? ___pmd_free_tlb+0x58/0x90 [ 540.271590][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.278094][ C0] ? generic_exec_single+0x370/0x370 [ 540.283486][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.289054][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.295699][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 540.301665][ C0] smp_call_function_many_cond+0x25e/0x900 [ 540.307476][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 540.313996][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 540.319631][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 540.324743][ C0] tlb_flush_mmu+0x274/0x630 [ 540.329331][ C0] tlb_finish_mmu+0x93/0x420 [ 540.333912][ C0] exit_mmap+0x298/0x4d0 [ 540.338150][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 540.343085][ C0] mmput+0xce/0x3d0 [ 540.346885][ C0] do_exit+0xa83/0x2c80 [ 540.351168][ C0] ? do_group_exit+0x2c7/0x340 [ 540.355931][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 540.361342][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 540.366185][ C0] ? do_raw_spin_lock+0x129/0x290 [ 540.371225][ C0] ? _raw_spin_unlock_irq+0x1f/0x30 [ 540.376417][ C0] do_group_exit+0x125/0x340 [ 540.381001][ C0] __x64_sys_exit_group+0x3a/0x50 [ 540.386031][ C0] do_syscall_64+0xb6/0x5a0 [ 540.390532][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 540.396416][ C0] RIP: 0033:0x448cd8 [ 540.400329][ C0] Code: Bad RIP value. [ 540.404388][ C0] RSP: 002b:00007ffc82c1de18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 540.412791][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000448cd8 [ 540.420754][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 540.428719][ C0] RBP: 00000000004cd190 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 540.436679][ C0] R10: 000000037ffffa00 R11: 0000000000000246 R12: 0000000000000001 [ 540.444655][ C0] R13: 00000000006e20c0 R14: 0000000000000000 R15: 0000000000000000 [ 540.452652][ C0] Sending NMI from CPU 0 to CPUs 1: [ 540.458921][ C0] NMI backtrace for cpu 1 [ 540.458929][ C0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5-syzkaller #0 [ 540.458936][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 540.458941][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 [ 540.458956][ C0] Code: 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 00 0f 02 00 65 8b 15 d8 b8 c2 7e f7 c2 00 01 1f 00 48 8b 34 24 74 0e <80> e6 01 74 34 80 b8 d4 12 00 00 00 74 2b 8b 90 b0 12 00 00 83 fa [ 540.458960][ C0] RSP: 0018:ffff8881db3099d8 EFLAGS: 00000006 [ 540.458969][ C0] RAX: ffff8881da213100 RBX: 0000000000000000 RCX: 0000000000000000 [ 540.458980][ C0] RDX: 0000000000000101 RSI: ffffffff84ba5e3a RDI: ffff8881d9285401 [ 540.458986][ C0] RBP: ffff8881d92852a0 R08: ffff8881da213100 R09: ffffed103b250a81 [ 540.458992][ C0] R10: ffffed103b250a80 R11: ffff8881d9285400 R12: 0000000000000001 [ 540.458999][ C0] R13: 0000000000000017 R14: 00000000000003e9 R15: 0000000000000001 [ 540.459005][ C0] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 540.459011][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 540.459017][ C0] CR2: 00007f9ad481a000 CR3: 00000001cd966000 CR4: 00000000001406e0 [ 540.459023][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 540.459029][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 540.459032][ C0] Call Trace: [ 540.459035][ C0] [ 540.459039][ C0] line6_midibuf_read+0x49a/0xa30 [ 540.459043][ C0] line6_data_received+0x318/0x520 [ 540.459047][ C0] ? device_id_show+0x80/0x80 [ 540.459051][ C0] __usb_hcd_giveback_urb+0x29a/0x550 [ 540.459056][ C0] usb_hcd_giveback_urb+0x368/0x420 [ 540.459059][ C0] dummy_timer+0x1258/0x32ae [ 540.459064][ C0] ? dummy_udc_probe+0x930/0x930 [ 540.459068][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.459072][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.459076][ C0] call_timer_fn+0x195/0x6f0 [ 540.459080][ C0] ? dummy_udc_probe+0x930/0x930 [ 540.459085][ C0] ? msleep_interruptible+0x130/0x130 [ 540.459089][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.459093][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.459097][ C0] ? _raw_spin_unlock_irq+0x1f/0x30 [ 540.459101][ C0] ? dummy_udc_probe+0x930/0x930 [ 540.459106][ C0] run_timer_softirq+0x5f9/0x1500 [ 540.459109][ C0] ? add_timer+0x7a0/0x7a0 [ 540.459114][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 540.459118][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 540.459129][ C0] __do_softirq+0x21e/0x950 [ 540.459132][ C0] irq_exit+0x178/0x1a0 [ 540.459137][ C0] smp_apic_timer_interrupt+0x141/0x540 [ 540.459141][ C0] apic_timer_interrupt+0xf/0x20 [ 540.459143][ C0] [ 540.459148][ C0] RIP: 0010:default_idle+0x28/0x300 [ 540.459162][ C0] Code: cc cc 41 56 41 55 65 44 8b 2d 44 77 72 7a 41 54 55 53 0f 1f 44 00 00 e8 b6 62 b5 fb e9 07 00 00 00 0f 00 2d ea 0c 53 00 fb f4 <65> 44 8b 2d 20 77 72 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 [ 540.459167][ C0] RSP: 0018:ffff8881da22fda8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 540.459181][ C0] RAX: 0000000000000007 RBX: ffff8881da213100 RCX: 0000000000000000 [ 540.459187][ C0] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da21394c [ 540.459193][ C0] RBP: ffffed103b442620 R08: ffff8881da213100 R09: 0000000000000000 [ 540.459200][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 540.459206][ C0] R13: 0000000000000001 R14: ffffffff87e607c0 R15: 0000000000000000 [ 540.459210][ C0] ? default_idle+0x1a/0x300 [ 540.459213][ C0] do_idle+0x3e0/0x500 [ 540.459218][ C0] ? __wake_up_common+0x147/0x650 [ 540.459222][ C0] ? arch_cpu_idle_exit+0x40/0x40 [ 540.459227][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 540.459231][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 540.459235][ C0] cpu_startup_entry+0x14/0x20 [ 540.459239][ C0] start_secondary+0x2a4/0x390 [ 540.459243][ C0] ? set_cpu_sibling_map+0x1e90/0x1e90 [ 540.459247][ C0] secondary_startup_64+0xb6/0xc0 [ 540.459256][ C0] Kernel panic - not syncing: softlockup: hung tasks [ 540.851633][ C0] CPU: 0 PID: 1796 Comm: syz-executor596 Tainted: G L 5.6.0-rc5-syzkaller #0 [ 540.861684][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 540.871733][ C0] Call Trace: [ 540.875013][ C0] [ 540.877990][ C0] dump_stack+0xef/0x16e [ 540.882244][ C0] panic+0x2aa/0x6e1 [ 540.891450][ C0] ? add_taint.cold+0x16/0x16 [ 540.896118][ C0] ? cpumask_next+0x3c/0x40 [ 540.900673][ C0] ? printk_safe_flush+0xd9/0x120 [ 540.905698][ C0] ? watchdog_timer_fn.cold+0xee/0x134 [ 540.911160][ C0] ? watchdog_timer_fn.cold+0xe5/0x134 [ 540.916611][ C0] watchdog_timer_fn.cold+0xff/0x134 [ 540.921921][ C0] __hrtimer_run_queues+0x32c/0xd20 [ 540.927133][ C0] ? lockup_detector_update_enable+0x90/0x90 [ 540.933112][ C0] ? hrtimer_init+0x2e0/0x2e0 [ 540.937846][ C0] ? ktime_get_update_offsets_now+0x24c/0x320 [ 540.943907][ C0] hrtimer_interrupt+0x2e8/0x730 [ 540.948837][ C0] smp_apic_timer_interrupt+0xfe/0x540 [ 540.954290][ C0] apic_timer_interrupt+0xf/0x20 [ 540.959228][ C0] [ 540.962166][ C0] RIP: 0010:smp_call_function_single+0x2cf/0x3a0 [ 540.968490][ C0] Code: 5f 5d c3 e8 53 62 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 33 62 0a 00 f3 90 <8b> 5c 24 58 31 ff 83 e3 01 89 de e8 c1 63 0a 00 85 db 75 e5 e8 18 [ 540.988100][ C0] RSP: 0018:ffff8881c6b87a20 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 540.996510][ C0] RAX: ffff8881cdf23100 RBX: 0000000000000001 RCX: ffffffff8134f3bf [ 541.004597][ C0] RDX: 0000000000000000 RSI: ffffffff8134f3ad RDI: 0000000000000005 [ 541.012577][ C0] RBP: ffff8881c6b87af0 R08: ffff8881cdf23100 R09: 0000000000000000 [ 541.020539][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 541.028502][ C0] R13: 0000000000000000 R14: ffff8881cda8c040 R15: ffff8881db233e00 [ 541.036476][ C0] ? smp_call_function_single+0x2df/0x3a0 [ 541.042183][ C0] ? smp_call_function_single+0x2cd/0x3a0 [ 541.047895][ C0] ? ___pmd_free_tlb+0x58/0x90 [ 541.052651][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.059144][ C0] ? generic_exec_single+0x370/0x370 [ 541.064419][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 541.069955][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.076449][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 541.082341][ C0] smp_call_function_many_cond+0x25e/0x900 [ 541.088138][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 541.094656][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 541.100301][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 541.105339][ C0] tlb_flush_mmu+0x274/0x630 [ 541.109922][ C0] tlb_finish_mmu+0x93/0x420 [ 541.114522][ C0] exit_mmap+0x298/0x4d0 [ 541.118771][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 541.123741][ C0] mmput+0xce/0x3d0 [ 541.127552][ C0] do_exit+0xa83/0x2c80 [ 541.131705][ C0] ? do_group_exit+0x2c7/0x340 [ 541.136480][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 541.141860][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 541.146726][ C0] ? do_raw_spin_lock+0x129/0x290 [ 541.151746][ C0] ? _raw_spin_unlock_irq+0x1f/0x30 [ 541.156936][ C0] do_group_exit+0x125/0x340 [ 541.161517][ C0] __x64_sys_exit_group+0x3a/0x50 [ 541.166530][ C0] do_syscall_64+0xb6/0x5a0 [ 541.171025][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 541.176907][ C0] RIP: 0033:0x448cd8 [ 541.180804][ C0] Code: Bad RIP value. [ 541.184858][ C0] RSP: 002b:00007ffc82c1de18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 541.193261][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000448cd8 [ 541.201246][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 541.209209][ C0] RBP: 00000000004cd190 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 541.217170][ C0] R10: 000000037ffffa00 R11: 0000000000000246 R12: 0000000000000001 [ 541.225145][ C0] R13: 00000000006e20c0 R14: 0000000000000000 R15: 0000000000000000 [ 542.291518][ C0] Shutting down cpus with NMI [ 542.296879][ C0] Kernel Offset: disabled [ 542.301279][ C0] Rebooting in 86400 seconds..