[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 13.597329][ C1] random: crng init done [?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 '10.128.1.11' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 536.678463][ T95] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 536.768583][ T95] usb 1-1: Using ep0 maxpacket: 32 [ 536.888397][ T95] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 536.896521][ T95] usb 1-1: config 0 has no interface number 0 [ 536.902795][ T95] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 536.911945][ T95] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 536.925624][ T95] usb 1-1: config 0 descriptor?? [ 536.976176][ T95] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 537.178354][ T95] snd_usb_pod 1-1:0.1: set_interface failed [ 537.184479][ T95] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now disconnected [ 537.192083][ T95] snd_usb_pod: probe of 1-1:0.1 failed with error -71 [ 537.200501][ T95] usb 1-1: USB disconnect, device number 2 [ 537.768344][ T95] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 537.858453][ T95] usb 1-1: Using ep0 maxpacket: 32 [ 537.978428][ T95] usb 1-1: config 0 has an invalid interface number: 1 but max is 0 [ 537.986460][ T95] usb 1-1: config 0 has no interface number 0 [ 537.992819][ T95] usb 1-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8 [ 538.001890][ T95] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 538.011398][ T95] usb 1-1: config 0 descriptor?? [ 538.050857][ T95] snd_usb_pod 1-1:0.1: Line 6 Pocket POD found [ 538.259166][ T95] snd_usb_pod 1-1:0.1: Line 6 Pocket POD now attached [ 672.055126][ C0] watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor413:1795] [ 672.063859][ C0] Modules linked in: [ 672.067746][ C0] irq event stamp: 35154 [ 672.072085][ C0] hardirqs last enabled at (35153): [] trace_hardirqs_on_thunk+0x1a/0x1c [ 672.082146][ C0] hardirqs last disabled at (35154): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 672.092382][ C0] softirqs last enabled at (33516): [] __do_softirq+0x673/0x950 [ 672.101695][ C0] softirqs last disabled at (33499): [] irq_exit+0x178/0x1a0 [ 672.111336][ C0] CPU: 0 PID: 1795 Comm: syz-executor413 Not tainted 5.6.0-rc3-syzkaller #0 [ 672.120014][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 672.130214][ C0] RIP: 0010:write_comp_data+0x17/0x70 [ 672.135593][ C0] Code: d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 00 0f 02 00 65 8b 05 78 b1 c2 7e a9 00 01 1f 00 75 51 <41> 8b 80 b0 12 00 00 83 f8 03 75 45 49 8b 80 b8 12 00 00 45 8b 80 [ 672.155196][ C0] RSP: 0018:ffff8881cdf77a38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 672.163606][ C0] RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 672.171570][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 [ 672.179544][ C0] RBP: ffff8881cdf77b08 R08: ffff8881ce40b100 R09: 0000000000000000 [ 672.187521][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 672.195493][ C0] R13: 0000000000000000 R14: ffff8881ce5839c0 R15: ffff8881db233dc0 [ 672.203466][ C0] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 672.212388][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 672.218964][ C0] CR2: 00007fe6518f0000 CR3: 0000000007021000 CR4: 00000000001406f0 [ 672.226930][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 672.234898][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 672.242869][ C0] Call Trace: [ 672.246218][ C0] smp_call_function_single+0x2df/0x3a0 [ 672.251860][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 672.258376][ C0] ? generic_exec_single+0x370/0x370 [ 672.263674][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 672.270280][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 672.276174][ C0] smp_call_function_many_cond+0x25e/0x900 [ 672.281980][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 672.288477][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 672.294103][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 672.299177][ C0] tlb_flush_mmu+0x274/0x630 [ 672.303764][ C0] tlb_finish_mmu+0x93/0x420 [ 672.308348][ C0] exit_mmap+0x298/0x4d0 [ 672.312582][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 672.317523][ C0] mmput+0xce/0x3d0 [ 672.321350][ C0] do_exit+0xaa0/0x2c50 [ 672.325559][ C0] ? hrtimer_init_sleeper_on_stack+0x90/0x90 [ 672.331537][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 672.336948][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 672.342279][ C0] ? raw_open+0x470/0x470 [ 672.346643][ C0] ? switch_fpu_return+0x1db/0x470 [ 672.351756][ C0] do_group_exit+0x125/0x340 [ 672.356352][ C0] __x64_sys_exit_group+0x3a/0x50 [ 672.361383][ C0] do_syscall_64+0xb6/0x5a0 [ 672.365890][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 672.371785][ C0] RIP: 0033:0x4436c8 [ 672.375684][ C0] Code: Bad RIP value. [ 672.379740][ C0] RSP: 002b:00007ffd45d85c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 672.388153][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004436c8 [ 672.396127][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 672.404113][ C0] RBP: 00000000004c3e28 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 672.412099][ C0] R10: 80603de77cf35948 R11: 0000000000000246 R12: 0000000000000001 [ 672.420075][ C0] R13: 00000000006d7f20 R14: 0000000000000000 R15: 0000000000000000 [ 672.428074][ C0] Sending NMI from CPU 0 to CPUs 1: [ 672.434331][ C0] NMI backtrace for cpu 1 [ 672.434337][ C0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc3-syzkaller #0 [ 672.434343][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 672.434347][ C0] RIP: 0010:line6_midibuf_read+0x486/0xa30 [ 672.434357][ C0] Code: 08 48 01 c1 48 89 0c 24 e8 97 4f 85 fc 44 89 f6 89 df e8 7d 50 85 fc 44 39 f3 0f 8d b4 02 00 00 e8 7f 4f 85 fc 48 8b 74 24 18 <48> 63 d3 48 8b 3c 24 e8 fe d2 ad fc 01 5d 10 e8 66 4f 85 fc 31 ff [ 672.434361][ C0] RSP: 0018:ffff8881db3099e8 EFLAGS: 00000006 [ 672.434369][ C0] RAX: ffff8881da213100 RBX: 0000000000000000 RCX: ffffffff84ba0d63 [ 672.434374][ C0] RDX: 0000000000000100 RSI: ffff8881cdc8c81c RDI: 0000000000000004 [ 672.434379][ C0] RBP: ffff8881d4e6b4a0 R08: ffff8881da213100 R09: ffffed103a9cd641 [ 672.434384][ C0] R10: ffffed103a9cd640 R11: ffff8881d4e6b200 R12: 0000000000000001 [ 672.434388][ C0] R13: 000000000000001c R14: 00000000000003e4 R15: 0000000000000001 [ 672.434394][ C0] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 672.434398][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 672.434403][ C0] CR2: 00007fe6518f0000 CR3: 00000001cf791000 CR4: 00000000001406e0 [ 672.434408][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 672.434413][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 672.434415][ C0] Call Trace: [ 672.434418][ C0] [ 672.434422][ C0] line6_data_received+0x318/0x520 [ 672.434425][ C0] ? device_id_show+0x80/0x80 [ 672.434429][ C0] __usb_hcd_giveback_urb+0x1f2/0x470 [ 672.434432][ C0] usb_hcd_giveback_urb+0x368/0x420 [ 672.434436][ C0] dummy_timer+0x1258/0x32ae [ 672.434439][ C0] ? dummy_udc_probe+0x930/0x930 [ 672.434443][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 672.434447][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 672.434450][ C0] call_timer_fn+0x195/0x6f0 [ 672.434453][ C0] ? dummy_udc_probe+0x930/0x930 [ 672.434457][ C0] ? msleep_interruptible+0x130/0x130 [ 672.434461][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 672.434465][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 672.434468][ C0] ? _raw_spin_unlock_irq+0x1f/0x30 [ 672.434472][ C0] ? dummy_udc_probe+0x930/0x930 [ 672.434475][ C0] run_timer_softirq+0x5f9/0x1500 [ 672.434479][ C0] ? add_timer+0x7a0/0x7a0 [ 672.434482][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 672.434486][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 672.434489][ C0] __do_softirq+0x21e/0x950 [ 672.434492][ C0] irq_exit+0x178/0x1a0 [ 672.434496][ C0] smp_apic_timer_interrupt+0x141/0x540 [ 672.434500][ C0] apic_timer_interrupt+0xf/0x20 [ 672.434502][ C0] [ 672.434506][ C0] RIP: 0010:default_idle+0x28/0x300 [ 672.434517][ 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 [ 672.434520][ C0] RSP: 0018:ffff8881da22fda8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 672.434529][ C0] RAX: 0000000000000007 RBX: ffff8881da213100 RCX: 0000000000000000 [ 672.434534][ C0] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da21394c [ 672.434539][ C0] RBP: ffffed103b442620 R08: ffff8881da213100 R09: 0000000000000000 [ 672.434544][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 672.434549][ C0] R13: 0000000000000001 R14: ffffffff87e60000 R15: 0000000000000000 [ 672.434552][ C0] ? default_idle+0x1a/0x300 [ 672.434555][ C0] do_idle+0x3e0/0x500 [ 672.434559][ C0] ? __wake_up_common+0x147/0x650 [ 672.434562][ C0] ? arch_cpu_idle_exit+0x40/0x40 [ 672.434566][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 672.434570][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 672.434573][ C0] cpu_startup_entry+0x14/0x20 [ 672.434577][ C0] start_secondary+0x2a4/0x390 [ 672.434580][ C0] ? set_cpu_sibling_map+0x1e90/0x1e90 [ 672.434584][ C0] secondary_startup_64+0xb6/0xc0 [ 672.434591][ C0] Kernel panic - not syncing: softlockup: hung tasks [ 672.822402][ C0] CPU: 0 PID: 1795 Comm: syz-executor413 Tainted: G L 5.6.0-rc3-syzkaller #0 [ 672.832457][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 672.842510][ C0] Call Trace: [ 672.845816][ C0] [ 672.848759][ C0] dump_stack+0xef/0x16e [ 672.853019][ C0] panic+0x2aa/0x6e1 [ 672.856914][ C0] ? add_taint.cold+0x16/0x16 [ 672.861588][ C0] ? cpumask_next+0x3c/0x40 [ 672.866141][ C0] ? printk_safe_flush+0xd9/0x120 [ 672.871162][ C0] ? watchdog_timer_fn.cold+0xee/0x134 [ 672.876615][ C0] ? watchdog_timer_fn.cold+0xe5/0x134 [ 672.882063][ C0] watchdog_timer_fn.cold+0xff/0x134 [ 672.887363][ C0] __hrtimer_run_queues+0x32c/0xd20 [ 672.892560][ C0] ? lockup_detector_update_enable+0x90/0x90 [ 672.898527][ C0] ? hrtimer_init+0x2e0/0x2e0 [ 672.903254][ C0] ? ktime_get_update_offsets_now+0x24c/0x320 [ 672.909319][ C0] hrtimer_interrupt+0x2e8/0x730 [ 672.914268][ C0] smp_apic_timer_interrupt+0xfe/0x540 [ 672.919748][ C0] apic_timer_interrupt+0xf/0x20 [ 672.924683][ C0] [ 672.927621][ C0] RIP: 0010:write_comp_data+0x17/0x70 [ 672.932995][ C0] Code: d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 00 0f 02 00 65 8b 05 78 b1 c2 7e a9 00 01 1f 00 75 51 <41> 8b 80 b0 12 00 00 83 f8 03 75 45 49 8b 80 b8 12 00 00 45 8b 80 [ 672.952597][ C0] RSP: 0018:ffff8881cdf77a38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 672.960998][ C0] RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff8134f89f [ 672.968960][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 [ 672.976921][ C0] RBP: ffff8881cdf77b08 R08: ffff8881ce40b100 R09: 0000000000000000 [ 672.984882][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 672.992863][ C0] R13: 0000000000000000 R14: ffff8881ce5839c0 R15: ffff8881db233dc0 [ 673.000847][ C0] ? smp_call_function_single+0x2df/0x3a0 [ 673.006743][ C0] smp_call_function_single+0x2df/0x3a0 [ 673.012282][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 673.018776][ C0] ? generic_exec_single+0x370/0x370 [ 673.024087][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 673.030671][ C0] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 673.036575][ C0] smp_call_function_many_cond+0x25e/0x900 [ 673.042391][ C0] ? flush_tlb_func_common.constprop.0+0x8a0/0x8a0 [ 673.048902][ C0] ? native_flush_tlb_others+0x3c9/0x4b0 [ 673.054533][ C0] flush_tlb_mm_range+0x1e8/0x3e0 [ 673.059569][ C0] tlb_flush_mmu+0x274/0x630 [ 673.064163][ C0] tlb_finish_mmu+0x93/0x420 [ 673.068752][ C0] exit_mmap+0x298/0x4d0 [ 673.073000][ C0] ? __ia32_sys_munmap+0x80/0x80 [ 673.077950][ C0] mmput+0xce/0x3d0 [ 673.081772][ C0] do_exit+0xaa0/0x2c50 [ 673.085938][ C0] ? hrtimer_init_sleeper_on_stack+0x90/0x90 [ 673.091924][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 673.097320][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 673.102628][ C0] ? raw_open+0x470/0x470 [ 673.106957][ C0] ? switch_fpu_return+0x1db/0x470 [ 673.112066][ C0] do_group_exit+0x125/0x340 [ 673.116653][ C0] __x64_sys_exit_group+0x3a/0x50 [ 673.121670][ C0] do_syscall_64+0xb6/0x5a0 [ 673.126168][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 673.132163][ C0] RIP: 0033:0x4436c8 [ 673.136058][ C0] Code: Bad RIP value. [ 673.140115][ C0] RSP: 002b:00007ffd45d85c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 673.148527][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004436c8 [ 673.156514][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 673.164483][ C0] RBP: 00000000004c3e28 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 673.172451][ C0] R10: 80603de77cf35948 R11: 0000000000000246 R12: 0000000000000001 [ 673.180429][ C0] R13: 00000000006d7f20 R14: 0000000000000000 R15: 0000000000000000 [ 674.252686][ C0] Shutting down cpus with NMI [ 674.258067][ C0] Kernel Offset: disabled [ 674.262460][ C0] Rebooting in 86400 seconds..