Merge branch 'bugfix/btdm_fix_set_attr_value_crash_when_length_is_0' into 'master'

component/bt: fix crash when the length of attr value set zero



See merge request !1397

components/bt/bluedroid/bta/gatt/bta_gatts_api.c

@@ -474,8 +474,10 @@ void BTA_GATTS_SendRsp (UINT16 conn_id, UINT32 trans_id,
 void BTA_SetAttributeValue(UINT16 attr_handle, UINT16 length, UINT8 *value)
 {
     tBTA_GATTS_API_SET_ATTR_VAL *p_buf;
+    UINT16  len = sizeof(tBTA_GATTS_API_SET_ATTR_VAL);
     if((p_buf = (tBTA_GATTS_API_SET_ATTR_VAL *)osi_malloc(
                     sizeof(tBTA_GATTS_API_SET_ATTR_VAL))) != NULL){
+        memset(p_buf, 0, len);
         p_buf->hdr.event = BTA_GATTS_API_SET_ATTR_VAL_EVT;
         p_buf->hdr.layer_specific = attr_handle;
         p_buf->length = length;

components/bt/bluedroid/stack/gatt/gatt_api.c

@@ -723,7 +723,9 @@ tGATT_STATUS GATTS_SetAttributeValue(UINT16 attr_handle, UINT16 length, UINT8 *v
 
     GATT_TRACE_DEBUG("GATTS_SetAttributeValue: attr_handle: %u  length: %u \n",
                     attr_handle, length);
-
+    if (length <= 0){
+        return GATT_INVALID_ATTR_LEN;
+    }
     if ((p_decl = gatt_find_hdl_buffer_by_attr_handle(attr_handle)) == NULL) {
         GATT_TRACE_DEBUG("Service not created\n"); 
         return GATT_INVALID_HANDLE;