linux-kernel - [PATCH net] wifi: plfxlc: fix potential memory leak in __lf_x_usb_enable

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Message-ID: <20221119051900.1192401-1-william.xuanziyang@huawei.com>
Date:   Sat, 19 Nov 2022 13:19:00 +0800
From:   Ziyang Xuan <william.xuanziyang@...wei.com>
To:     <srini.raju@...elifi.com>, <kvalo@...nel.org>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <linux-wireless@...r.kernel.org>,
        <netdev@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>
Subject: [PATCH net] wifi: plfxlc: fix potential memory leak in __lf_x_usb_enable_rx()

urbs does not be freed in exception paths in __lf_x_usb_enable_rx().
That will trigger memory leak. To fix it, add kfree() for urbs within
"error" label. Compile tested only.

Fixes: 68d57a07bfe5 ("wireless: add plfxlc driver for pureLiFi X, XL, XC devices")
Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>
---
 drivers/net/wireless/purelifi/plfxlc/usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/purelifi/plfxlc/usb.c b/drivers/net/wireless/purelifi/plfxlc/usb.c
index 39e54b3787d6..76d0a778636a 100644
--- a/drivers/net/wireless/purelifi/plfxlc/usb.c
+++ b/drivers/net/wireless/purelifi/plfxlc/usb.c
@@ -247,6 +247,7 @@ static int __lf_x_usb_enable_rx(struct plfxlc_usb *usb)
 		for (i = 0; i < RX_URBS_COUNT; i++)
 			free_rx_urb(urbs[i]);
 	}
+	kfree(urbs);
 	return r;
 }
 
-- 
2.25.1