diff mbox series

[3/7] xfs: fix getfsmap reporting past the last rt extent

Message ID 168506055240.3727958.10764251103410563406.stgit@frogsfrogsfrogs (mailing list archive)
State New, archived
Headers show
Series xfs: fix ranged queries and integer overflows in GETFSMAP | expand

Commit Message

Darrick J. Wong May 26, 2023, 12:41 a.m. UTC 
From: Darrick J. Wong <djwong@kernel.org>

The realtime section ends at the last rt extent.  If the user configures
the rt geometry with an extent size that is not an integer factor of the
number of rt blocks, it's possible for there to be rt blocks past the
end of the last rt extent.  These tail blocks cannot ever be allocated
and will cause corruption reports if the last extent coincides with the
end of an rt bitmap block, so do not report consider them for the
GETFSMAP output.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/xfs_fsmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 901918116d3d..6bd6ab56ca9f 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -529,7 +529,7 @@  __xfs_getfsmap_rtdev(
 	uint64_t			eofs;
 	int				error = 0;
 
-	eofs = XFS_FSB_TO_BB(mp, mp->m_sb.sb_rblocks);
+	eofs = XFS_FSB_TO_BB(mp, mp->m_sb.sb_rextents * mp->m_sb.sb_rextsize);
 	if (keys[0].fmr_physical >= eofs)
 		return 0;
 	start_rtb = XFS_BB_TO_FSBT(mp,