[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

syzkaller login: [   34.239329][ T8319] bash (8319) used greatest stack depth: 11016 bytes left
Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts.
executing program
[   75.191261][ T4911] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   75.571284][ T4911] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
[   75.582296][ T4911] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0
[   75.592550][ T4911] usb 1-1: New USB device found, idVendor=056a, idProduct=ffff, bcdDevice= 0.40
[   75.601821][ T4911] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   75.610314][ T4911] usb 1-1: config 0 descriptor??
[   76.093078][ T4911] wacom 0003:056A:FFFF.0001: Unknown device_type for 'HID 056a:ffff'. Ignoring.
[   76.291821][ T3666] usb 1-1: USB disconnect, device number 2
[   82.185921][ T8486] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff8881017c7e00 (size 512):
  comm "kworker/1:4", pid 4911, jiffies 4294944878 (age 8.170s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000a8f2ad30>] __kfifo_alloc+0xad/0x100
    [<00000000b8e4b962>] wacom_probe+0x1a1/0x3b0
    [<000000005d1015f8>] hid_device_probe+0x16b/0x210
    [<00000000ff99174b>] really_probe+0x159/0x480
    [<0000000040d3877b>] driver_probe_device+0x84/0x100
    [<00000000f7fa0a00>] __device_attach_driver+0xee/0x110
    [<00000000e2c9869a>] bus_for_each_drv+0xb7/0x100
    [<00000000d17b2b16>] __device_attach+0x122/0x250
    [<00000000c5d56a57>] bus_probe_device+0xc6/0xe0
    [<0000000092d5c316>] device_add+0x5be/0xc30
    [<000000005a939197>] hid_add_device+0x151/0x390
    [<00000000a8030507>] usbhid_probe+0x4d1/0x620
    [<000000009110a36d>] usb_probe_interface+0x177/0x370
    [<00000000ff99174b>] really_probe+0x159/0x480
    [<0000000040d3877b>] driver_probe_device+0x84/0x100
    [<00000000f7fa0a00>] __device_attach_driver+0xee/0x110