drivers: net: slip: fix NPD bug in sltxtimeout()
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 v4.19.239 by commit 753b9d220a7d36dac70e7c6d05492d10d6f9dd36. For more details please see the references link.