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

[Ivy Lopez <skunkolee@gmail.com>]

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