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    Subject[PATCH 5.4 69/92] usb: gadget: function: printer: Fix a memory leak for interface descriptor
    Date
    From: Zqiang <qiang.zhang@windriver.com>

    commit 2cc332e4ee4febcbb685e2962ad323fe4b3b750a upstream.

    When printer driver is loaded, the printer_func_bind function is called, in
    this function, the interface descriptor be allocated memory, if after that,
    the error occurred, the interface descriptor memory need to be free.

    Reviewed-by: Peter Chen <peter.chen@nxp.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: Zqiang <qiang.zhang@windriver.com>
    Link: https://lore.kernel.org/r/20201210020148.6691-1-qiang.zhang@windriver.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/gadget/function/f_printer.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/usb/gadget/function/f_printer.c
    +++ b/drivers/usb/gadget/function/f_printer.c
    @@ -1126,6 +1126,7 @@ fail_tx_reqs:
    printer_req_free(dev->in_ep, req);
    }

    + usb_free_all_descriptors(f);
    return ret;

    }

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