[info] Using makefile-style concurrent boot in runlevel 2.
[   13.788985][    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 '10.128.0.96' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   25.841743][   T17] usb 1-1: new low-speed USB device number 2 using dummy_hcd
[   26.201766][   T17] usb 1-1: config 0 has an invalid interface number: 137 but max is 0
[   26.210006][   T17] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config
[   26.220132][   T17] usb 1-1: config 0 has no interface number 0
[   26.226269][   T17] usb 1-1: config 0 interface 137 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt
[   26.236389][   T17] usb 1-1: New USB device found, idVendor=04d8, idProduct=0a30, bcdDevice=81.29
[   26.245437][   T17] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   26.255477][   T17] usb 1-1: config 0 descriptor??
[   26.271865][ T1790] raw-gadget gadget: fail, usb_ep_enable returned -22
[   26.295465][   T17] ------------[ cut here ]------------
[   26.301032][   T17] usb 1-1: BOGUS urb xfer, pipe 3 != type 1
[   26.307222][   T17] WARNING: CPU: 1 PID: 17 at drivers/usb/core/urb.c:478 usb_submit_urb+0x1188/0x1460
[   26.316713][   T17] Kernel panic - not syncing: panic_on_warn set ...
[   26.323284][   T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.6.0-rc3-syzkaller #0
[   26.331461][   T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.341512][   T17] Workqueue: usb_hub_wq hub_event
[   26.346513][   T17] Call Trace:
[   26.349800][   T17]  dump_stack+0xef/0x16e
[   26.354020][   T17]  ? usb_submit_urb+0x1090/0x1460
[   26.359037][   T17]  panic+0x2aa/0x6e1
[   26.362941][   T17]  ? add_taint.cold+0x16/0x16
[   26.367618][   T17]  ? __probe_kernel_read+0x188/0x1d0
[   26.373026][   T17]  ? __warn.cold+0x14/0x30
[   26.377443][   T17]  ? __warn+0xd5/0x1c8
[   26.381524][   T17]  ? usb_submit_urb+0x1188/0x1460
[   26.386552][   T17]  __warn.cold+0x2f/0x30
[   26.390792][   T17]  ? usb_submit_urb+0x1188/0x1460
[   26.395932][   T17]  report_bug+0x27b/0x2f0
[   26.400252][   T17]  do_error_trap+0x12b/0x1e0
[   26.404832][   T17]  ? usb_submit_urb+0x1188/0x1460
[   26.409839][   T17]  do_invalid_op+0x32/0x40
[   26.414246][   T17]  ? usb_submit_urb+0x1188/0x1460
[   26.419267][   T17]  invalid_op+0x23/0x30
[   26.423417][   T17] RIP: 0010:usb_submit_urb+0x1188/0x1460
[   26.429038][   T17] Code: 4d 85 ed 74 46 e8 18 ce dd fd 4c 89 f7 e8 d0 5c 17 ff 41 89 d8 44 89 e1 4c 89 ea 48 89 c6 48 c7 c7 e0 e7 3b 86 e8 a0 5f b2 fd <0f> 0b e9 20 f4 ff ff e8 ec cd dd fd 0f 1f 44 00 00 e8 e2 cd dd fd
[   26.448636][   T17] RSP: 0018:ffff8881da267170 EFLAGS: 00010286
[   26.454679][   T17] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
[   26.462635][   T17] RDX: 0000000000000000 RSI: ffffffff812977dd RDI: ffffed103b44ce20
[   26.470639][   T17] RBP: ffff8881ce330400 R08: ffff8881da24b100 R09: fffffbfff1266c8f
[   26.478629][   T17] R10: fffffbfff1266c8e R11: ffffffff89336477 R12: 0000000000000003
[   26.486597][   T17] R13: ffff8881d072e0f0 R14: ffff8881cdaf20a0 R15: ffff8881d4e3c200
[   26.494602][   T17]  ? vprintk_func+0x7d/0x113
[   26.499173][   T17]  mcba_usb_probe+0x83a/0