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")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211019202356.12572-1-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 4f0ae82..4e51d5a 100644 (file)
--- 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;
 }