rose: Fix NULL pointer dereference in rosesendframe()
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 v5.4.224 by commit b13be5e852b03f376058027e462fad4230240891, it was introduced in version v5.4.212 by commit 6e4b20d548fc97ecbdca15c8d96302ee5e3e6313. For more details please see the references link.