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>] kmalloc_array include/linux/slab.h:592 [inline] [<00000000eae4bcfa>] __kfifo_alloc+0xad/0x100 lib/kfifo.c:43 [<00000000b5008a22>] wacom_probe+0x1a1/0x3b0 drivers/hid/wacom_sys.c:2727 [<000000007f7233a0>] hid_device_probe+0x16b/0x210 drivers/hid/hid-core.c:2281 [<00000000dfca6969>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000b50d8a7b>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 [<00000000960875cd>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851 [<000000007615f321>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<000000000e3f8541>] __device_attach+0x122/0x250 drivers/base/dd.c:919 [<000000007ac334c5>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000c9fc9311>] device_add+0x5be/0xc30 drivers/base/core.c:3091 [<000000007b98537d>] hid_add_device+0x151/0x390 drivers/hid/hid-core.c:2437 [<000000001bd33b40>] usbhid_probe+0x4d1/0x620 drivers/hid/usbhid/hid-core.c:1409 [<00000000ebfc824f>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000dfca6969>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000b50d8a7b>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 [<00000000960875cd>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851