binder: fix alloc->vmavmmm null-ptr dereference
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 v5.15.66 by commit 81203ab7a6ef843a2b904a0a494f28c457d44d27, it was introduced in version v5.15.64 by commit 577d9c05cc48c5242bcf719c06a5baf3105473ad. For more details please see the references link.