qcacld-3.0: Add NULL check for hdd_ctx pointer

Add NULL check for hdd_ctx pointer to avoid NULL pointer deference.

Change-Id: I47093616724b85efe475044ab737ffd9fc084384
CRs-Fixed: 3624530

core/hdd/src/wlan_hdd_sysfs_rf_test_mode.c

@@ -48,6 +48,11 @@ static ssize_t hdd_sysfs_rf_test_mode_show(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)
@@ -113,6 +118,11 @@ hdd_sysfs_rf_test_mode_store(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)

core/hdd/src/wlan_hdd_sysfs_roam_trigger_bitmap.c

@@ -44,6 +44,11 @@ static ssize_t hdd_sysfs_roam_trigger_bitmap_show(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)
@@ -103,6 +108,11 @@ hdd_sysfs_roam_trigger_bitmap_store(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)

core/hdd/src/wlan_hdd_sysfs_wds_mode.c

@@ -44,6 +44,11 @@ static ssize_t hdd_sysfs_wds_mode_show(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)
@@ -102,6 +107,11 @@ hdd_sysfs_wds_mode_store(struct kobject *kobj,
 	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
 	ssize_t errno_size;
 
+	if (!hdd_ctx) {
+		hdd_err_rl("invalid input");
+		return -EINVAL;
+	}
+
 	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
 					     &psoc_sync);
 	if (errno_size)