BUG: memory leak unreferenced object 0xffff88810821fa00 (size 512): comm "kworker/0:2", pid 3723, jiffies 4294943495 (age 8.040s) 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: [<0000000068403789>] kmalloc_array include/linux/slab.h:592 [inline] [<0000000068403789>] __kfifo_alloc+0xad/0x100 lib/kfifo.c:43 [<000000009ca642a8>] wacom_probe+0x1a1/0x3b0 drivers/hid/wacom_sys.c:2727 [<000000008ef3a7c0>] hid_device_probe+0x16b/0x210 drivers/hid/hid-core.c:2281 [<00000000fc9628d9>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<00000000ff2c75e6>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<00000000afdd96c5>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 [<000000008761abf3>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000f5c833ed>] __device_attach+0x122/0x250 drivers/base/dd.c:912 [<00000000b5c7f162>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000d0b0a1c6>] device_add+0x5ac/0xc30 drivers/base/core.c:2936 [<00000000d66f3c7e>] hid_add_device+0x151/0x390 drivers/hid/hid-core.c:2437 [<00000000f559542c>] usbhid_probe+0x412/0x560 drivers/hid/usbhid/hid-core.c:1407 [<000000006b3d2016>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000fc9628d9>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<00000000ff2c75e6>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<00000000afdd96c5>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844