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 v4.9.333 by commit 01b9c68c121847d05a4ccef68244dadf82bfa331, it was introduced in version v4.9.327 by commit 76885373129b13df35ecc9b4ee86ea5840f12133. For more details please see the references link.