Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.167523][   T21] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   47.407475][   T21] usb 1-1: Using ep0 maxpacket: 8
[   47.527545][   T21] usb 1-1: config 0 has an invalid interface number: 49 but max is 0
[   47.536178][   T21] usb 1-1: config 0 has no interface number 0
[   47.543603][   T21] usb 1-1: config 0 interface 49 has no altsetting 0
[   47.552613][   T21] usb 1-1: New USB device found, idVendor=0e41, idProduct=4150, bcdDevice=72.03
[   47.563016][   T21] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   47.574029][   T21] usb 1-1: config 0 descriptor??
[   47.620073][   T21] snd_usb_toneport 1-1:0.49: Line 6 POD Studio UX1 found
[   47.927886][   T21] snd_usb_toneport 1-1:0.49: read request failed (error -110)
[   48.127603][   T21] snd_usb_toneport 1-1:0.49: receive length failed (error -110)
[   48.207602][   T21] snd_usb_toneport 1-1:0.49: write failed (error 0)
[   48.327521][   T21] usb 1-1: send failed (error -110)
[   48.447560][   T21] usb 1-1: send failed (error -110)
[   48.456425][   T21] snd_usb_toneport 1-1:0.49: Line 6 POD Studio UX1 now attached
[   49.468188][   T21] ==================================================================
[   49.478184][   T21] BUG: KASAN: null-ptr-deref in submit_audio_out_urb+0x919/0x1780
[   49.486596][   T21] Write of size 20 at addr 0000000000000010 by task kworker/1:1/21
[   49.494862][   T21] 
[   49.497676][   T21] CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13
[   49.505198][   T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.516346][   T21] Workqueue: events line6_startup_work
[   49.522012][   T21] Call Trace:
[   49.525459][   T21]  dump_stack+0xca/0x13e
[   49.530261][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.536188][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.542282][   T21]  __kasan_report.cold+0x5/0x32
[   49.547514][   T21]  ? __mutex_lock+0x301/0x12b0
[   49.553494][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.559389][   T21]  kasan_report+0xe/0x20
[   49.564084][   T21]  memset+0x20/0x40
[   49.568145][   T21]  submit_audio_out_urb+0x919/0x1780
[   49.573915][   T21]  ? line6_stream_start+0x50/0x1f0
[   49.579722][   T21]  line6_submit_audio_out_all_urbs+0xc9/0x120
[   49.586338][   T21]  line6_stream_start+0x156/0x1f0
[   49.591540][   T21]  line6_pcm_acquire+0x134/0x210
[   49.596820][   T21]  ? snd_toneport_source_info+0x160/0x160
[   49.602964][   T21]  line6_startup_work+0x42/0x50
[   49.608103][   T21]  process_one_work+0x905/0x1570
[   49.613103][   T21]  ? pwq_dec_nr_in_flight+0x310/0x310
[   49.619106][   T21]  ? do_raw_spin_lock+0x11a/0x280
[   49.624148][   T21]  worker_thread+0x96/0xe20
[   49.629369][   T21]  ? process_one_work+0x1570/0x1570
[   49.635350][   T21]  kthread+0x30b/0x410
[   49.639423][   T21]  ? kthread_park+0x1a0/0x1a0
[   49.644150][   T21]  ret_from_fork+0x24/0x30
[   49.648905][   T21] ==================================================================
[   49.657734][   T21] Disabling lock debugging due to kernel taint
[   49.664462][   T21] Kernel panic - not syncing: panic_on_warn set ...
[   49.671284][   T21] CPU: 1 PID: 21 Comm: kworker/1:1 Tainted: G    B             5.2.0-rc6+ #13
[   49.681446][   T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.692239][   T21] Workqueue: events line6_startup_work
[   49.697819][   T21] Call Trace:
[   49.701210][   T21]  dump_stack+0xca/0x13e
[   49.705877][   T21]  panic+0x292/0x6c9
[   49.710403][   T21]  ? __warn_printk+0xf3/0xf3
[   49.715548][   T21]  ? lock_downgrade+0x630/0x630
[   49.720938][   T21]  ? trace_hardirqs_off+0x50/0x1c0
[   49.726061][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.731611][   T21]  end_report+0x43/0x49
[   49.736186][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.741665][   T21]  __kasan_report.cold+0xd/0x32
[   49.746885][   T21]  ? __mutex_lock+0x301/0x12b0
[   49.751751][   T21]  ? submit_audio_out_urb+0x919/0x1780
[   49.757212][   T21]  kasan_report+0xe/0x20
[   49.761464][   T21]  memset+0x20/0x40
[   49.765286][   T21]  submit_audio_out_urb+0x919/0x1780
[   49.771229][   T21]  ? line6_stream_start+0x50/0x1f0
[   49.776474][   T21]  line6_submit_audio_out_all_urbs+0xc9/0x120
[   49.782644][   T21]  line6_stream_start+0x156/0x1f0
[   49.788024][   T21]  line6_pcm_acquire+0x134/0x210
[   49.793086][   T21]  ? snd_toneport_source_info+0x160/0x160
[   49.798820][   T21]  line6_startup_work+0x42/0x50
[   49.804045][   T21]  process_one_work+0x905/0x1570
[   49.809004][   T21]  ? pwq_dec_nr_in_flight+0x310/0x310
[   49.815559][   T21]  ? do_raw_spin_lock+0x11a/0x280
[   49.820589][   T21]  worker_thread+0x96/0xe20
[   49.825096][   T21]  ? process_one_work+0x1570/0x1570
[   49.830289][   T21]  kthread+0x30b/0x410
[   49.834694][   T21]  ? kthread_park+0x1a0/0x1a0
[   49.839376][   T21]  ret_from_fork+0x24/0x30
[   49.844788][   T21] Kernel Offset: disabled
[   49.849411][   T21] Rebooting in 86400 seconds..