linux-kernel - [PATCH] staging: r8188eu: fix memleak in rtw_wx_set_enc

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Message-Id: <20211019202356.12572-1-martin@kaiser.cx>
Date:   Tue, 19 Oct 2021 22:23:56 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH] staging: r8188eu: fix memleak in rtw_wx_set_enc_ext

Free the param struct if the caller sets an unsupported algorithm
and we return an error.

Fixes: 2b42bd58b321 ("staging: r8188eu: introduce new os_dep dir for RTL8188eu driver")
Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 4f0ae821d193..4e51d5a55985 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -1897,7 +1897,7 @@ static int rtw_wx_set_enc_ext(struct net_device *dev,
 	struct ieee_param *param = NULL;
 	struct iw_point *pencoding = &wrqu->encoding;
 	struct iw_encode_ext *pext = (struct iw_encode_ext *)extra;
-	int ret = 0;
+	int ret = -1;
 
 	param_len = sizeof(struct ieee_param) + pext->key_len;
 	param = kzalloc(param_len, GFP_KERNEL);
@@ -1923,7 +1923,7 @@ static int rtw_wx_set_enc_ext(struct net_device *dev,
 		alg_name = "CCMP";
 		break;
 	default:
-		return -1;
+		goto out;
 	}
 
 	strlcpy((char *)param->u.crypt.alg, alg_name, IEEE_CRYPT_ALG_NAME_LEN);
@@ -1950,6 +1950,7 @@ static int rtw_wx_set_enc_ext(struct net_device *dev,
 
 	ret =  wpa_set_encryption(dev, param, param_len);
 
+out:
 	kfree(param);
 	return ret;
 }
-- 
2.20.1