linux-kernel - [PATCH] staging: gdm724x: fix potential memleak in register_lte

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Date:   Sun, 20 Nov 2022 17:08:35 +0800
From:   Zhang Changzhong <zhangchangzhong@...wei.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Won Kang <wkang77@...il.com>
CC:     Zhang Changzhong <zhangchangzhong@...wei.com>,
        <linux-staging@...ts.linux.dev>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] staging: gdm724x: fix potential memleak in register_lte_device()

The register_lte_device() forgets to free the current netdev in case of
register_netdev() fails, add free_netdev() to fix it.

Compile tested only.

Fixes: 61e121047645 ("staging: gdm7240: adding LTE USB driver")
Signed-off-by: Zhang Changzhong <zhangchangzhong@...wei.com>
---
 drivers/staging/gdm724x/gdm_lte.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/gdm724x/gdm_lte.c b/drivers/staging/gdm724x/gdm_lte.c
index 671ee88..34ac9e0 100644
--- a/drivers/staging/gdm724x/gdm_lte.c
+++ b/drivers/staging/gdm724x/gdm_lte.c
@@ -905,8 +905,10 @@ int register_lte_device(struct phy_dev *phy_dev,
 		SET_NETDEV_DEVTYPE(net, &wwan_type);
 
 		ret = register_netdev(net);
-		if (ret)
+		if (ret) {
+			free_netdev(net);
 			goto err;
+		}
 
 		netif_carrier_on(net);
 
-- 
2.9.5