From 8215fde26bd290b4c8c65f35721c71dbaafc7a7c Mon Sep 17 00:00:00 2001
From: hangtian <hangtian@codeaurora.org>
Date: Wed, 10 Jul 2019 12:27:19 +0800
Subject: [PATCH] qcacld-3.0: Validate wdev before accessing netdev

Validate wdev before accessing netdev in __wlan_hdd_cfg80211_set_txpower.
Avoid invalid memory access.

Change-Id: I48af4e458ef7571cfdf9f157cdb8c3427fff4fc7
CRs-Fixed: 2487005
---
 core/hdd/src/wlan_hdd_power.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/hdd/src/wlan_hdd_power.c b/core/hdd/src/wlan_hdd_power.c
index 48cddd1ea0e0..bc3c021d8cc0 100644
--- a/core/hdd/src/wlan_hdd_power.c
+++ b/core/hdd/src/wlan_hdd_power.c
@@ -2020,7 +2020,7 @@ static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
 {
 	struct hdd_context *hdd_ctx = (struct hdd_context *) wiphy_priv(wiphy);
 	mac_handle_t mac_handle;
-	struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(wdev->netdev);
+	struct hdd_adapter *adapter;
 	struct qdf_mac_addr bssid = QDF_MAC_ADDR_BCAST_INIT;
 	struct qdf_mac_addr selfmac;
 	QDF_STATUS status;
@@ -2029,6 +2029,13 @@ static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
 
 	hdd_enter();
 
+	if (!wdev) {
+		hdd_err("wdev is null, set tx power failed");
+		return -EIO;
+	}
+
+	adapter = WLAN_HDD_GET_PRIV_PTR(wdev->netdev);
+
 	if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) {
 		hdd_err("Command not allowed in FTM mode");
 		return -EINVAL;