s390/dasd: fix Oops in dasdaliasgetstartdev due to missing pavgroup
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 by commit db7ba07108a48c0f95b74fabbfd5d63e924f992d, it was introduced in version v2.6.25 by commit 8e09f21574ea3028d5629e5de759e0b196c690c5. For more details please see the references link.