linux-kernel - [PATCH 3/3] staging: rtl8712: fix potential memory leak in r8712_init_drv

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Date:   Fri,  1 Apr 2022 01:08:19 +0800
From:   xkernel.wang@...mail.com
To:     gregkh@...uxfoundation.org
Cc:     Larry.Finger@...inger.net, florian.c.schilhabel@...glemail.com,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH 3/3] staging: rtl8712: fix potential memory leak in r8712_init_drv_sw()

From: Xiaoke Wang <xkernel.wang@...mail.com>

In r8712_init_drv_sw(), all the error paths do not properly release the
resources allocated by its callees.
This patch is to free them.

Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
 drivers/staging/rtl8712/os_intfs.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c
index 163baaa..28b1684 100644
--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/drivers/staging/rtl8712/os_intfs.c
@@ -304,23 +304,23 @@ int r8712_init_drv_sw(struct _adapter *padapter)
 	padapter->cmdpriv.padapter = padapter;
 	ret = r8712_init_evt_priv(&padapter->evtpriv);
 	if (ret)
-		return ret;
+		goto free_cmd_priv;
 	ret = r8712_init_mlme_priv(padapter);
 	if (ret)
-		return ret;
+		goto free_evt_priv;
 	ret = _r8712_init_xmit_priv(&padapter->xmitpriv, padapter);
 	if (ret)
-		return ret;
+		goto free_mlme_priv;
 	ret = _r8712_init_recv_priv(&padapter->recvpriv, padapter);
 	if (ret)
-		return ret;
+		goto free_xmit_priv;
 	memset((unsigned char *)&padapter->securitypriv, 0,
 	       sizeof(struct security_priv));
 	timer_setup(&padapter->securitypriv.tkip_timer,
 		    r8712_use_tkipkey_handler, 0);
 	ret = _r8712_init_sta_priv(&padapter->stapriv);
 	if (ret)
-		return ret;
+		goto free_recv_priv;
 	padapter->stapriv.padapter = padapter;
 	r8712_init_bcmc_stainfo(padapter);
 	r8712_init_pwrctrl_priv(padapter);
@@ -328,6 +328,18 @@ int r8712_init_drv_sw(struct _adapter *padapter)
 	init_default_value(padapter);
 	r8712_InitSwLeds(padapter);
 	return ret;
+
+free_recv_priv:
+	_r8712_free_recv_priv(&padapter->recvpriv);
+free_xmit_priv:
+	_free_xmit_priv(&padapter->xmitpriv);
+free_mlme_priv:
+	r8712_free_mlme_priv(&padapter->mlmepriv);
+free_evt_priv:
+	r8712_free_evt_priv(&padapter->evtpriv);
+free_cmd_priv:
+	r8712_free_cmd_priv(&padapter->cmdpriv);
+	return ret;
 }
 
 void r8712_free_drv_sw(struct _adapter *padapter)
--