ipgre: test csumstart instead of transport header
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.247 by commit 7596bd7920985f7fc8579a92e48bc53ce4475b21, it was introduced in version v4.19.207 by commit 774430026bd9a472d08c5d3c33351a782315771a. For more details please see the references link.