mm: /proc/pid/smaps_rollup: fix no vma's null-deref
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 v6.0.6 by commit 97898139ca9b81ba9322a585e07490983c53b55a, it was introduced in version v4.19 by commit 258f669e7e88c18edbc23fe5ce00a476b924551f. For more details please see the references link.