netdev - [PATCH] ipw2200: fix memory leak in ipw_wdev

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Date:   Thu, 8 Dec 2022 20:26:30 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-wireless@...r.kernel.org>, <netdev@...r.kernel.org>,
        <stas.yakovlev@...il.com>, <kvalo@...nel.org>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>
CC:     <linville@...driver.com>, <weiyongjun1@...wei.com>,
        <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH] ipw2200: fix memory leak in ipw_wdev_init()

In the error path of ipw_wdev_init(), exception value is returned, and
the memory applied for in the function is not released. Also the memory
is not released in ipw_pci_probe(). As a result, memory leakage occurs.
So memory release needs to be added to the error path of ipw_wdev_init().

Fixes: a3caa99e6c68 ("libipw: initiate cfg80211 API conversion (v2)")
Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 drivers/net/wireless/intel/ipw2x00/ipw2200.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/ipw2x00/ipw2200.c b/drivers/net/wireless/intel/ipw2x00/ipw2200.c
index 5b483de18c81..cead5c7fc91e 100644
--- a/drivers/net/wireless/intel/ipw2x00/ipw2200.c
+++ b/drivers/net/wireless/intel/ipw2x00/ipw2200.c
@@ -11397,9 +11397,15 @@ static int ipw_wdev_init(struct net_device *dev)
 	set_wiphy_dev(wdev->wiphy, &priv->pci_dev->dev);
 
 	/* With that information in place, we can now register the wiphy... */
-	if (wiphy_register(wdev->wiphy))
+	if (wiphy_register(wdev->wiphy)) {
 		rc = -EIO;
+		goto out;
+	}
+
+	return 0;
 out:
+	kfree(priv->ieee->a_band.channels);
+	kfree(priv->ieee->bg_band.channels);
 	return rc;
 }
 
-- 
2.34.1