linux-kernel - [PATCH 4.19 59/77] usb: gadget: function: printer: Fix a memory leak for interface descriptor

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Message-Id: <20210111130039.250133604@linuxfoundation.org>
Date:   Mon, 11 Jan 2021 14:02:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Peter Chen <peter.chen@....com>,
        Zqiang <qiang.zhang@...driver.com>
Subject: [PATCH 4.19 59/77] usb: gadget: function: printer: Fix a memory leak for interface descriptor

From: Zqiang <qiang.zhang@...driver.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@....com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Zqiang <qiang.zhang@...driver.com>
Link: https://lore.kernel.org/r/20201210020148.6691-1-qiang.zhang@windriver.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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;
 
 }