gfs2: Check sbbsizeshift after reading superblock
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 v4.9.334 by commit d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87. For more details please see the references link.