[PATCH 2/6] xfs: fix off-by-one error when calling xchk_xref_has_rt_owner

From: Darrick J. Wong <[email protected]>

LOLLM noticed an off-by-one error when computing the length of the
rtrmap to cross-check.

Cc: <[email protected]> # v6.14
Fixes: 037a44d8277adf ("xfs: cross-reference the realtime rmapbt")
Signed-off-by: "Darrick J. Wong" <[email protected]>
Assisted-by: LOLLM # finding obvious bugs
---
 fs/xfs/scrub/rtbitmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c
index de3f22f310f7eb..52c24d3d4be6ce 100644
--- a/fs/xfs/scrub/rtbitmap.c
+++ b/fs/xfs/scrub/rtbitmap.c
@@ -258,7 +258,7 @@ xchk_rtbitmap(
 	 * the last free extent we saw and the last possible extent in the rt
 	 * group.
 	 */
-	last_rgbno = rtg->rtg_extents * mp->m_sb.sb_rextsize - 1;
+	last_rgbno = rtg->rtg_extents * mp->m_sb.sb_rextsize;
 	if (rtb->next_free_rgbno < last_rgbno)
 		xchk_xref_has_rt_owner(sc, rtb->next_free_rgbno,
 				last_rgbno - rtb->next_free_rgbno);