[PATCH] staging: rtl8723bs: use kfree_sensitive() for key material in rtw_set_key()

[PATCH] staging: rtl8723bs: use kfree_sensitive() for key material in rtw_set_key()

[Ivy Lopez]

psetkeyparm holds WEP/TKIP/AES key material copied in via memcpy
from psecuritypriv before being freed. Use kfree_sensitive() instead
of kfree() so the key bytes are zeroed before the memory is released,
consistent with how psetstakey_para is already handled elsewhere in
this driver.

Signed-off-by: Ivy Lopez <skunkolee@gmail.com>
---
 drivers/staging/rtl8723bs/core/rtw_mlme.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
index 1196ec011455..fb45f7295386 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
@@ -1926,14 +1926,14 @@ signed int rtw_set_key(struct adapter *adapter, struct security_priv *psecurityp
 		break;
 	default:
 		res = _FAIL;
-		kfree(psetkeyparm);
+		kfree_sensitive(psetkeyparm);
 		goto exit;
 	}
 
 	if (enqueue) {
 		pcmd = kzalloc_obj(*pcmd);
 		if (!pcmd) {
-			kfree(psetkeyparm);
+			kfree_sensitive(psetkeyparm);
 			res = _FAIL;  /* try again */
 			goto exit;
 		}
@@ -1949,7 +1949,7 @@ signed int rtw_set_key(struct adapter *adapter, struct security_priv *psecurityp
 		res = rtw_enqueue_cmd(pcmdpriv, pcmd);
 	} else {
 		setkey_hdl(adapter, (u8 *)psetkeyparm);
-		kfree(psetkeyparm);
+		kfree_sensitive(psetkeyparm);
 	}
 exit:
 	return res;
-- 
2.55.0

[PATCH] staging: rtl8723bs: use guard(mutex) in ips_enter()

[Ivy Lopez]

Replace manual mutex_lock()/mutex_unlock() in ips_enter() with
guard(mutex) from linux/cleanup.h. This is a single-exit function
so the conversion is a direct drop-in and removes the need to
manually balance the unlock.

Signed-off-by: Ivy Lopez <skunkolee@gmail.com>
---
 drivers/staging/rtl8723bs/core/rtw_pwrctrl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_pwrctrl.c b/drivers/staging/rtl8723bs/core/rtw_pwrctrl.c
index b9f8cf1014ed..141c322befb6 100644
--- a/drivers/staging/rtl8723bs/core/rtw_pwrctrl.c
+++ b/drivers/staging/rtl8723bs/core/rtw_pwrctrl.c
@@ -6,6 +6,7 @@
  ******************************************************************************/
 #include <drv_types.h>
 #include <hal_data.h>
+#include <linux/cleanup.h>
 #include <linux/jiffies.h>
 
 void _ips_enter(struct adapter *padapter)
@@ -37,9 +38,8 @@ void ips_enter(struct adapter *padapter)
 
 	hal_btcoex_IpsNotify(padapter, pwrpriv->ips_mode_req);
 
-	mutex_lock(&pwrpriv->lock);
+	guard(mutex)(&pwrpriv->lock);
 	_ips_enter(padapter);
-	mutex_unlock(&pwrpriv->lock);
 }
 
 int _ips_leave(struct adapter *padapter)
-- 
2.55.0

[PATCH] staging: rtl8723bs: use kfree_sensitive() for key material in rtw_set_key()

[Ivy Lopez]

psetkeyparm holds WEP/TKIP/AES key material copied in via memcpy
from psecuritypriv before being freed. Use kfree_sensitive() instead
of kfree() so the key bytes are zeroed before the memory is released,
consistent with how psetstakey_para is already handled elsewhere in
this driver.

Signed-off-by: Ivy Lopez <skunkolee@gmail.com>
---
 drivers/staging/rtl8723bs/core/rtw_mlme.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
index 1196ec011455..fb45f7295386 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
@@ -1926,14 +1926,14 @@ signed int rtw_set_key(struct adapter *adapter, struct security_priv *psecurityp
 		break;
 	default:
 		res = _FAIL;
-		kfree(psetkeyparm);
+		kfree_sensitive(psetkeyparm);
 		goto exit;
 	}
 
 	if (enqueue) {
 		pcmd = kzalloc_obj(*pcmd);
 		if (!pcmd) {
-			kfree(psetkeyparm);
+			kfree_sensitive(psetkeyparm);
 			res = _FAIL;  /* try again */
 			goto exit;
 		}
@@ -1949,7 +1949,7 @@ signed int rtw_set_key(struct adapter *adapter, struct security_priv *psecurityp
 		res = rtw_enqueue_cmd(pcmdpriv, pcmd);
 	} else {
 		setkey_hdl(adapter, (u8 *)psetkeyparm);
-		kfree(psetkeyparm);
+		kfree_sensitive(psetkeyparm);
 	}
 exit:
 	return res;
-- 
2.55.0

Re: [PATCH] staging: rtl8723bs: use kfree_sensitive() for key material in rtw_set_key()

[Ivy Lopez]

Apologies, this was sent twice by mistake (duplicate of
Message-ID: 20260730231315.79688-1-skunkolee@gmail.com). Please
disregard this copy!

Signed-off-by: Ivy Lopez <skunkolee@gmail.com>