[ 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 '10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.337210][ T54] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 50.607138][ T54] usb 1-1: Using ep0 maxpacket: 32 [ 50.727254][ T54] usb 1-1: too many endpoints for config 0 interface 0 altsetting 0: 132, using maximum allowed: 30 [ 50.738235][ T54] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 50.749608][ T54] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0 [ 50.759733][ T54] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 132 [ 50.772910][ T54] usb 1-1: New USB device found, idVendor=056a, idProduct=0033, bcdDevice= 0.00 [ 50.782148][ T54] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 50.793437][ T54] usb 1-1: config 0 descriptor?? [ 51.277695][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.284610][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.291703][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.298807][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.305694][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.312967][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.320108][ T54] wacom 0003:056A:0033.0001: unknown main item tag 0x0 [ 51.327300][ T54] wacom: probe of 0003:056A:0033.0001 failed with error -22 [ 51.490925][ T7] usb 1-1: USB disconnect, device number 2 executing program [ 56.806343][ T7] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 57.066328][ T7] usb 1-1: Using ep0 maxpacket: 32 [ 57.186391][ T7] usb 1-1: too many endpoints for config 0 interface 0 altsetting 0: 132, using maximum allowed: 30 [ 57.197250][ T7] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 57.208171][ T7] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0 [ 57.217973][ T7] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 132 [ 57.231008][ T7] usb 1-1: New USB device found, idVendor=056a, idProduct=0033, bcdDevice= 0.00 [ 57.240146][ T7] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.248805][ T7] usb 1-1: config 0 descriptor?? [ 57.726950][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.733869][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.740956][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.747960][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.754831][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.761883][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.768869][ T7] wacom 0003:056A:0033.0002: unknown main item tag 0x0 [ 57.775816][ T7] wacom: probe of 0003:056A:0033.0002 failed with error -22 [ 57.926971][ T54] usb 1-1: USB disconnect, device number 3 [ 59.022673][ T8464] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak) BUG: memory leak unreferenced object 0xffff88810d541800 (size 512): comm "kworker/1:1", pid 54, jiffies 4294942399 (age 14.280s) 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: [<00000000b784fe4c>] __kfifo_alloc+0xad/0x100 [<0000000017bb0a09>] wacom_probe+0x1a1/0x3b0 [<000000002c3bf3f9>] hid_device_probe+0x16b/0x210 [<00000000f6783109>] really_probe+0x159/0x480 [<00000000b5a9d84e>] driver_probe_device+0x84/0x100 [<000000006de0d12d>] __device_attach_driver+0xee/0x110 [<00000000fe5c166b>] bus_for_each_drv+0xb7/0x100 [<000000007192a271>] __device_attach+0x122/0x250 [<0000000074620aaf>] bus_probe_device+0xc6/0xe0 [<00000000d8f3a0a4>] device_add+0x5ac/0xc30 [<00000000e1d8a4c3>] hid_add_device+0x151/0x390 [<00000000987f555f>] usbhid_probe+0x412/0x560 [<00000000e5b3cc96>] usb_probe_interface+0x177/0x370 [<00000000f6783109>] really_probe+0x159/0x480 [<00000000b5a9d84e>] driver_probe_device+0x84/0x100 [<000000006de0d12d>] __device_attach_driver+0xee/0x110