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 v4.19.265 by commit 5b46adfbee1e429f33b10a88d6c00fa88f3d6c77, it was introduced in version v4.19.257 by commit 0aae33feb7a56b28318f92c960a3d08d9c305984. For more details please see the references link.