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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-05-31 09:07:21 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-06-01 09:00:16 -0700 |
| commit | 8ad560d2565e64b8be0cf5901c1e8fe034ac5599 (patch) | |
| tree | a137e6d45738351525fba7e4852d55721214e88b /fs/xfs | |
| parent | a03f1641c7a6d4e88c6aae0cd3d52305cdb967a0 (diff) | |
| download | op-kernel-dev-8ad560d2565e64b8be0cf5901c1e8fe034ac5599.zip op-kernel-dev-8ad560d2565e64b8be0cf5901c1e8fe034ac5599.tar.gz | |
xfs: strengthen rtalloc query range checks
Strengthen the rtalloc range query checks to make sure that the keys do
not run off the end of the realtime device inappropriately. Note that
the query range functions require units of rt extents, not blocks,
despite the type name.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_rtbitmap.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c index 7712f28..1855182c1 100644 --- a/fs/xfs/libxfs/xfs_rtbitmap.c +++ b/fs/xfs/libxfs/xfs_rtbitmap.c @@ -1038,8 +1038,11 @@ xfs_rtalloc_query_range( if (low_rec->ar_startblock > high_rec->ar_startblock) return -EINVAL; - else if (low_rec->ar_startblock == high_rec->ar_startblock) + if (low_rec->ar_startblock >= mp->m_sb.sb_rextents || + low_rec->ar_startblock == high_rec->ar_startblock) return 0; + if (high_rec->ar_startblock >= mp->m_sb.sb_rextents) + high_rec->ar_startblock = mp->m_sb.sb_rextents - 1; /* Iterate the bitmap, looking for discrepancies. */ rtstart = low_rec->ar_startblock; @@ -1083,7 +1086,7 @@ xfs_rtalloc_query_all( struct xfs_rtalloc_rec keys[2]; keys[0].ar_startblock = 0; - keys[1].ar_startblock = tp->t_mountp->m_sb.sb_rblocks; + keys[1].ar_startblock = tp->t_mountp->m_sb.sb_rextents - 1; keys[0].ar_blockcount = keys[1].ar_blockcount = 0; return xfs_rtalloc_query_range(tp, &keys[0], &keys[1], fn, priv); |
