Have to add a check that the computed cylinder group size does not exceed the block size of the filesystem. It is also necessary to validate additional parameters when a superblock is going to be used in read-only mode if its supplementary information is going to be read in to ensure that the size and location of the supplementary information is valid. Also when a warning is raised let it be accepted, but bound the flagged field to the value checked by the warning. No legitimate superblocks should fail as a result of these changes. Reported by: Bob Prohaska, John-Mark Gurney, and Mark Millard Tested by: Peter Holm Reviewed by: Peter Holm MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D38668 |
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