xfs_repair: strengthen geometry checks
In xfs_repair, the inodelog, sectlog, and dirblklog values are read
directly into the xfs_mount structure without any sanity checking by the
verifier. This results in xfs_repair segfaulting when those fields have
ridiculously high values because the pointer arithmetic runs us off the
end of the metadata buffers. Therefore, reject the superblock if these
values are garbage and try to find one of the other ones. Clean up the
dblocks checking to use the relevant macros.
The superblock field fuzzer (xfs/1301) triggers all these segfaults.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
3 files changed
