BUG: memory leak
unreferenced object 0xffff888040c4c000 (size 1024):
  comm "kworker/u7:5", pid 295, jiffies 4295277271 (age 23.492s)
  hex dump (first 32 bytes):
    00 e0 8f 41 80 88 ff ff 00 f4 e2 0d 80 88 ff ff  ...A............
    fd 03 00 00 00 00 00 00 00 06 0c 00 00 00 00 00  ................
  backtrace:
    [<00000000a2a3684b>] kmalloc_trace+0x26/0xc0
    [<00000000ff2dc677>] l2cap_conn_add.part.0+0x64/0xe40
    [<00000000b44e084a>] l2cap_connect_cfm+0x23b/0x1000
    [<00000000fa73586d>] hci_conn_failed+0x167/0x2a0
    [<00000000f4e1ad11>] hci_abort_conn_sync+0xad3/0xdf0
    [<0000000054daf893>] abort_conn_sync+0x18f/0x3b0
    [<00000000d9697d16>] hci_cmd_sync_work+0x14a/0x2a0
    [<00000000aa2eb7c1>] process_one_work+0x7c8/0x1450
    [<0000000098e8c52f>] worker_thread+0x80e/0x1190
    [<00000000b41994c4>] kthread+0x33f/0x440
    [<00000000d012135e>] ret_from_fork+0x48/0x80
    [<00000000c2053680>] ret_from_fork_asm+0x1b/0x30

BUG: leak checking failed