net/x25: Fix null-ptr-deref caused by x25_disconnect
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 v4.14.276 by commit 858642789ada1b48630f322e59416ca9fca3e6b7, it was introduced in version v4.14.192 by commit f0b6ce595c397a91d5b62c6b0b5ea93b84191795. For more details please see the references link.