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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-12-05 12:32:50 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-12-05 12:32:50 +1100 |
| commit | d2a047f31e86941fa896e0e3271536d50aba415e (patch) | |
| tree | 0ff8117d63fcf7b839a3facd7f2ca307efdb60c0 /fs/xfs/xfs_mount.h | |
| parent | f7a136aee3c1c3f7daf87197b3b3c361744a2812 (diff) | |
| download | linux-d2a047f31e86941fa896e0e3271536d50aba415e.tar.bz2 | |
xfs: forbid AG btrees with level == 0
There is no such thing as a zero-level AG btree since even a single-node
zero-records btree has one level. Btree cursor constructors read
cur_nlevels straight from disk and then access things like
cur_bufs[cur_nlevels - 1] which is /really/ bad if cur_nlevels is zero!
Therefore, strengthen the verifiers to prevent this possibility.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
0 files changed, 0 insertions, 0 deletions