BUG: memory leak
unreferenced object 0xffff888110201c60 (size 32):
  comm "softirq", pid 0, jiffies 4294941904 (age 10.450s)
  hex dump (first 32 bytes):
    02 00 00 00 08 00 00 00 80 06 00 01 00 00 08 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000e3a4881d>] kmalloc include/linux/slab.h:552 [inline]
    [<00000000e3a4881d>] raw_event_queue_add drivers/usb/gadget/legacy/raw_gadget.c:66 [inline]
    [<00000000e3a4881d>] raw_queue_event drivers/usb/gadget/legacy/raw_gadget.c:225 [inline]
    [<00000000e3a4881d>] gadget_setup+0xf6/0x220 drivers/usb/gadget/legacy/raw_gadget.c:343
    [<00000000b39ed35e>] dummy_timer+0xb9f/0x14c0 drivers/usb/gadget/udc/dummy_hcd.c:1899
    [<000000003e6f3bd5>] call_timer_fn+0x38/0x200 kernel/time/timer.c:1410
    [<00000000ebafeb77>] expire_timers kernel/time/timer.c:1455 [inline]
    [<00000000ebafeb77>] __run_timers.part.0+0x319/0x400 kernel/time/timer.c:1747
    [<0000000035fabc2e>] __run_timers kernel/time/timer.c:1728 [inline]
    [<0000000035fabc2e>] run_timer_softirq+0x3d/0x80 kernel/time/timer.c:1760
    [<00000000b9f4842b>] __do_softirq+0xcc/0x2c2 kernel/softirq.c:298
    [<00000000fd7f1709>] asm_call_irq_on_stack+0xf/0x20
    [<0000000059c79a31>] __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
    [<0000000059c79a31>] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
    [<0000000059c79a31>] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
    [<000000000fcb9fcd>] invoke_softirq kernel/softirq.c:393 [inline]
    [<000000000fcb9fcd>] __irq_exit_rcu kernel/softirq.c:423 [inline]
    [<000000000fcb9fcd>] irq_exit_rcu+0x91/0xc0 kernel/softirq.c:435
    [<00000000135d689d>] sysvec_apic_timer_interrupt+0x36/0x80 arch/x86/kernel/apic/apic.c:1091
    [<00000000a88f9dc6>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
    [<000000007de63ab1>] native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
    [<000000007de63ab1>] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
    [<000000007de63ab1>] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
    [<000000007de63ab1>] acpi_idle_do_entry+0xc3/0xd0 drivers/acpi/processor_idle.c:517
    [<000000007c51a6ee>] acpi_idle_enter+0x128/0x1f0 drivers/acpi/processor_idle.c:648
    [<00000000877e9b55>] cpuidle_enter_state+0xc9/0x650 drivers/cpuidle/cpuidle.c:237
    [<000000003acb85a7>] cpuidle_enter+0x29/0x40 drivers/cpuidle/cpuidle.c:351
    [<00000000022ba1c3>] call_cpuidle kernel/sched/idle.c:132 [inline]
    [<00000000022ba1c3>] cpuidle_idle_call kernel/sched/idle.c:213 [inline]
    [<00000000022ba1c3>] do_idle+0x1c8/0x250 kernel/sched/idle.c:273