From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Fix an off-by-one error in the realtime bitmap "is used" cross-reference helper function if the realtime extent size is a single block. Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --- fs/xfs/scrub/rtbitmap.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c index 665d4bbb17cc..dbe115b075f7 100644 --- a/fs/xfs/scrub/rtbitmap.c +++ b/fs/xfs/scrub/rtbitmap.c @@ -141,9 +141,8 @@ xchk_xref_is_used_rt_space( startext = fsbno; endext = fsbno + len - 1; do_div(startext, sc->mp->m_sb.sb_rextsize); - if (do_div(endext, sc->mp->m_sb.sb_rextsize)) - endext++; - extcount = endext - startext; + do_div(endext, sc->mp->m_sb.sb_rextsize); + extcount = endext - startext + 1; xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount, &is_free);
