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[174.0.186.197]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2cebec91c92sm30178305ad.56.2026.07.13.16.34.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 16:34:19 -0700 (PDT) From: Ivy Lopez To: gregkh@linuxfoundation.org Cc: linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Ivy Lopez Subject: [PATCH] staging: rtl8723bs: use kfree_sensitive() for key material Date: Mon, 13 Jul 2026 17:34:01 -0600 Message-ID: <20260713233401.48262-1-skunkolee@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The set_stakey_parm struct contains a 16-byte encryption key. Use kfree_sensitive() instead of kfree() to ensure the key material is zeroed before the memory is freed, preventing potential information leaks. Signed-off-by: Ivy Lopez --- drivers/net/ethernet/faraday/ftmac100.c | 47 +++++------------------- drivers/staging/rtl8723bs/core/rtw_cmd.c | 8 ++-- 2 files changed, 13 insertions(+), 42 deletions(-) diff --git a/drivers/net/ethernet/faraday/ftmac100.c b/drivers/net/ethernet/faraday/ftmac100.c index 5803a382f0ba..adb318925f44 100644 --- a/drivers/net/ethernet/faraday/ftmac100.c +++ b/drivers/net/ethernet/faraday/ftmac100.c @@ -49,7 +49,6 @@ struct ftmac100_descs { }; struct ftmac100 { - struct resource *res; void __iomem *base; int irq; @@ -1137,11 +1136,9 @@ static int ftmac100_probe(struct platform_device *pdev) return irq; /* setup net_device */ - netdev = alloc_etherdev(sizeof(*priv)); - if (!netdev) { - err = -ENOMEM; - goto err_alloc_etherdev; - } + netdev = devm_alloc_etherdev(&pdev->dev, sizeof(*priv)); + if (!netdev) + return -ENOMEM; SET_NETDEV_DEV(netdev, &pdev->dev); netdev->ethtool_ops = &ftmac100_ethtool_ops; @@ -1150,7 +1147,7 @@ static int ftmac100_probe(struct platform_device *pdev) err = platform_get_ethdev_address(&pdev->dev, netdev); if (err == -EPROBE_DEFER) - goto defer_get_mac; + return err; platform_set_drvdata(pdev, netdev); @@ -1165,20 +1162,9 @@ static int ftmac100_probe(struct platform_device *pdev) netif_napi_add(netdev, &priv->napi, ftmac100_poll); /* map io memory */ - priv->res = request_mem_region(res->start, resource_size(res), - dev_name(&pdev->dev)); - if (!priv->res) { - dev_err(&pdev->dev, "Could not reserve memory region\n"); - err = -ENOMEM; - goto err_req_mem; - } - - priv->base = ioremap(res->start, resource_size(res)); - if (!priv->base) { - dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n"); - err = -EIO; - goto err_ioremap; - } + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); priv->irq = irq; @@ -1208,32 +1194,17 @@ static int ftmac100_probe(struct platform_device *pdev) return 0; err_register_netdev: - iounmap(priv->base); -err_ioremap: - release_resource(priv->res); -err_req_mem: netif_napi_del(&priv->napi); -defer_get_mac: - free_netdev(netdev); -err_alloc_etherdev: return err; } static void ftmac100_remove(struct platform_device *pdev) { - struct net_device *netdev; - struct ftmac100 *priv; - - netdev = platform_get_drvdata(pdev); - priv = netdev_priv(netdev); + struct net_device *netdev = platform_get_drvdata(pdev); + struct ftmac100 *priv = netdev_priv(netdev); unregister_netdev(netdev); - - iounmap(priv->base); - release_resource(priv->res); - netif_napi_del(&priv->napi); - free_netdev(netdev); } static const struct of_device_id ftmac100_of_ids[] = { diff --git a/drivers/staging/rtl8723bs/core/rtw_cmd.c b/drivers/staging/rtl8723bs/core/rtw_cmd.c index b932670f5d63..a34ee407285b 100644 --- a/drivers/staging/rtl8723bs/core/rtw_cmd.c +++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c @@ -899,7 +899,7 @@ u8 rtw_setstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 unicast_ if (enqueue) { ph2c = kzalloc_obj(*ph2c); if (!ph2c) { - kfree(psetstakey_para); + kfree_sensitive(psetstakey_para); res = _FAIL; goto exit; } @@ -907,7 +907,7 @@ u8 rtw_setstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 unicast_ psetstakey_rsp = kzalloc_obj(*psetstakey_rsp); if (!psetstakey_rsp) { kfree(ph2c); - kfree(psetstakey_para); + kfree_sensitive(psetstakey_para); res = _FAIL; goto exit; } @@ -918,7 +918,7 @@ u8 rtw_setstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 unicast_ res = rtw_enqueue_cmd(pcmdpriv, ph2c); } else { set_stakey_hdl(padapter, (u8 *)psetstakey_para); - kfree(psetstakey_para); + kfree_sensitive(psetstakey_para); } exit: return res; @@ -958,7 +958,7 @@ u8 rtw_clearstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 enqueu psetstakey_rsp = kzalloc_obj(*psetstakey_rsp); if (!psetstakey_rsp) { kfree(ph2c); - kfree(psetstakey_para); + kfree_sensitive(psetstakey_para); res = _FAIL; goto exit; } -- 2.55.0