[ 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 Warning: Permanently added '10.128.0.163' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 89.886412][ T3592] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 90.136381][ T3592] usb 1-1: Using ep0 maxpacket: 32 [ 90.256406][ T3592] usb 1-1: too many endpoints for config 0 interface 0 altsetting 0: 132, using maximum allowed: 30 [ 90.267362][ T3592] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 90.278679][ T3592] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0 [ 90.288597][ T3592] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 132 [ 90.301751][ T3592] usb 1-1: New USB device found, idVendor=056a, idProduct=0033, bcdDevice= 0.00 [ 90.310951][ T3592] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 90.320757][ T3592] usb 1-1: config 0 descriptor?? [ 90.818072][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.824983][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.832068][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.839106][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.846169][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.853207][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.860155][ T3592] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 90.867174][ T3592] wacom: probe of 0003:056A:0033.0001 failed with error -22 [ 91.016813][ T7] usb 1-1: USB disconnect, device number 2 [ 96.921592][ T8463] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak) BUG: memory leak unreferenced object 0xffff88810d9ad200 (size 512): comm "kworker/1:2", pid 3592, jiffies 4294946343 (age 8.180s) 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: [<00000000eae4bcfa>] __kfifo_alloc+0xad/0x100 [<00000000b5008a22>] wacom_probe+0x1a1/0x3b0 [<000000007f7233a0>] hid_device_probe+0x16b/0x210 [<00000000dfca6969>] really_probe+0x159/0x480 [<00000000b50d8a7b>] driver_probe_device+0x84/0x100 [<00000000960875cd>] __device_attach_driver+0xee/0x110 [<000000007615f321>] bus_for_each_drv+0xb7/0x100 [<000000000e3f8541>] __device_attach+0x122/0x250 [<000000007ac334c5>] bus_probe_device+0xc6/0xe0 [<00000000c9fc9311>] device_add+0x5be/0xc30 [<000000007b98537d>] hid_add_device+0x151/0x390 [<000000001bd33b40>] usbhid_probe+0x4d1/0x620 [<00000000ebfc824f>] usb_probe_interface+0x177/0x370 [<00000000dfca6969>] really_probe+0x159/0x480 [<00000000b50d8a7b>] driver_probe_device+0x84/0x100 [<00000000960875cd>] __device_attach_driver+0xee/0x110