[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 15.627106][ 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 '10.128.15.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.713540][ T17] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 43.953512][ T17] usb 1-1: Using ep0 maxpacket: 8 [ 44.073587][ T17] usb 1-1: config 0 has an invalid interface number: 49 but max is 0 [ 44.082014][ T17] usb 1-1: config 0 has no interface number 0 [ 44.088451][ T17] usb 1-1: config 0 interface 49 has no altsetting 0 [ 44.095190][ T17] usb 1-1: New USB device found, idVendor=0e41, idProduct=4150, bcdDevice=72.03 [ 44.104245][ T17] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 44.114033][ T17] usb 1-1: config 0 descriptor?? [ 44.156151][ T17] snd_usb_toneport 1-1:0.49: Line 6 POD Studio UX1 found [ 44.473724][ T17] snd_usb_toneport 1-1:0.49: read request failed (error -110) [ 44.673603][ T17] snd_usb_toneport 1-1:0.49: receive length failed (error -110) [ 44.753595][ T17] snd_usb_toneport 1-1:0.49: write failed (error 0) [ 44.873559][ T17] usb 1-1: send failed (error -110) [ 44.993559][ T17] usb 1-1: send failed (error -110) [ 45.002577][ T17] snd_usb_toneport 1-1:0.49: Line 6 POD Studio UX1 now attached [ 46.033992][ T17] ================================================================== [ 46.042568][ T17] BUG: KASAN: null-ptr-deref in submit_audio_out_urb+0x919/0x1780 [ 46.050522][ T17] Write of size 20 at addr 0000000000000010 by task kworker/1:0/17 [ 46.058496][ T17] [ 46.060817][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.2.0-rc6+ #13 [ 46.068254][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.078393][ T17] Workqueue: events line6_startup_work [ 46.083832][ T17] Call Trace: [ 46.087103][ T17] dump_stack+0xca/0x13e [ 46.091326][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.096773][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.102228][ T17] __kasan_report.cold+0x5/0x32 [ 46.107240][ T17] ? __mutex_lock+0x301/0x12b0 [ 46.112002][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.117629][ T17] kasan_report+0xe/0x20 [ 46.122706][ T17] memset+0x20/0x40 [ 46.126621][ T17] submit_audio_out_urb+0x919/0x1780 [ 46.131916][ T17] ? line6_stream_start+0x50/0x1f0 [ 46.137203][ T17] line6_submit_audio_out_all_urbs+0xc9/0x120 [ 46.144764][ T17] line6_stream_start+0x156/0x1f0 [ 46.150231][ T17] line6_pcm_acquire+0x134/0x210 [ 46.155846][ T17] ? snd_toneport_source_info+0x160/0x160 [ 46.161646][ T17] line6_startup_work+0x42/0x50 [ 46.166723][ T17] process_one_work+0x905/0x1570 [ 46.171649][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 46.177078][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 46.182108][ T17] worker_thread+0x96/0xe20 [ 46.186722][ T17] ? process_one_work+0x1570/0x1570 [ 46.192261][ T17] kthread+0x30b/0x410 [ 46.196413][ T17] ? kthread_park+0x1a0/0x1a0 [ 46.201069][ T17] ret_from_fork+0x24/0x30 [ 46.205466][ T17] ================================================================== [ 46.213845][ T17] Disabling lock debugging due to kernel taint [ 46.219982][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 46.226743][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Tainted: G B 5.2.0-rc6+ #13 [ 46.235840][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.246325][ T17] Workqueue: events line6_startup_work [ 46.251764][ T17] Call Trace: [ 46.255034][ T17] dump_stack+0xca/0x13e [ 46.259404][ T17] panic+0x292/0x6c9 [ 46.263292][ T17] ? __warn_printk+0xf3/0xf3 [ 46.267863][ T17] ? lock_downgrade+0x630/0x630 [ 46.272962][ T17] ? trace_hardirqs_off+0x50/0x1c0 [ 46.278266][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.283724][ T17] end_report+0x43/0x49 [ 46.288031][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.294191][ T17] __kasan_report.cold+0xd/0x32 [ 46.299795][ T17] ? __mutex_lock+0x301/0x12b0 [ 46.304627][ T17] ? submit_audio_out_urb+0x919/0x1780 [ 46.310077][ T17] kasan_report+0xe/0x20 [ 46.314303][ T17] memset+0x20/0x40 [ 46.318095][ T17] submit_audio_out_urb+0x919/0x1780 [ 46.323613][ T17] ? line6_stream_start+0x50/0x1f0 [ 46.328836][ T17] line6_submit_audio_out_all_urbs+0xc9/0x120 [ 46.336056][ T17] line6_stream_start+0x156/0x1f0 [ 46.341081][ T17] line6_pcm_acquire+0x134/0x210 [ 46.346114][ T17] ? snd_toneport_source_info+0x160/0x160 [ 46.352081][ T17] line6_startup_work+0x42/0x50 [ 46.357008][ T17] process_one_work+0x905/0x1570 [ 46.362210][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 46.367680][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 46.372970][ T17] worker_thread+0x96/0xe20 [ 46.377593][ T17] ? process_one_work+0x1570/0x1570 [ 46.383044][ T17] kthread+0x30b/0x410 [ 46.387177][ T17] ? kthread_park+0x1a0/0x1a0 [ 46.391846][ T17] ret_from_fork+0x24/0x30 [ 46.396744][ T17] Kernel Offset: disabled [ 46.401061][ T17] Rebooting in 86400 seconds..