Current sb verifier doesn't check bounds on sb_fdblocks and sb_ifree.
Add sanity checks for these parameters.
Signed-off-by: NBill O'Donnell <billodo@redhat.com>
[darrick: port to refactored sb validation predicates]
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: NEric Sandeen <sandeen@redhat.com>