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From:   Larry Finger <Larry.Finger@lwfinger.net>
To:     kvalo@codeaurora.org
Cc:     linux-wireless@vger.kernel.org, pkshih@realtek.com,
        Larry Finger <Larry.Finger@lwfinger.net>
Subject: [PATCH v2] rtlwifi: rtl_pci: Fix memory leak when hardware init fails
Date:   Mon, 26 Aug 2019 17:03:44 -0500
Message-Id: <20190826220344.7084-1-Larry.Finger@lwfinger.net>
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Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

If the call to hw_init() fails for any of the drivers, the driver will
leak memory that was allocated in BT coexistence setup. Technically, each
of the drivers should have done this free; however placing it in rtl_pci
fixes all the drivers with only a single patch.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
---
v2 - Fix typo in subject line
---
Kalle,

This bug has been present in the driver since it was added to the
kernel, there is no particular rush in applying it.

Larry
---
 drivers/net/wireless/realtek/rtlwifi/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c b/drivers/net/wireless/realtek/rtlwifi/pci.c
index 4055e0ab75ba..c275fc932adb 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.c
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.c
@@ -1793,6 +1793,8 @@ static int rtl_pci_start(struct ieee80211_hw *hw)
 	if (err) {
 		RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 			 "Failed to config hardware!\n");
+		kfree(rtlpriv->btcoexist.btc_context);
+		kfree(rtlpriv->btcoexist.wifi_only_context);
 		return err;
 	}
 	rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
-- 
2.22.1