diff mbox series

[08/10] xfs: improve the code that checks recovered extent-free intent items

Message ID 160729623525.1607103.4901814787209783122.stgit@magnolia (mailing list archive)
State Accepted, archived
Headers show
Series xfs: strengthen log intent validation | expand

Commit Message

Darrick J. Wong Dec. 6, 2020, 11:10 p.m. UTC 
From: Darrick J. Wong <darrick.wong@oracle.com>

The code that validates recovered extent-free intent items is kind of a
mess -- it doesn't use the standard xfs type validators, and it doesn't
check for things that it should.  Fix the validator function to use the
standard validation helpers and look for more types of obvious errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
 fs/xfs/xfs_extfree_item.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index f86c8a7c9c4e..bfdfbd192a38 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -584,14 +584,13 @@  xfs_efi_validate_ext(
 	struct xfs_mount		*mp,
 	struct xfs_extent		*extp)
 {
-	xfs_fsblock_t			startblock_fsb;
+	if (extp->ext_start + extp->ext_len <= extp->ext_start)
+		return false;
 
-	startblock_fsb = XFS_BB_TO_FSB(mp,
-			   XFS_FSB_TO_DADDR(mp, extp->ext_start));
-	if (startblock_fsb == 0 ||
-	    extp->ext_len == 0 ||
-	    startblock_fsb >= mp->m_sb.sb_dblocks ||
-	    extp->ext_len >= mp->m_sb.sb_agblocks)
+	if (!xfs_verify_fsbno(mp, extp->ext_start))
+		return false;
+
+	if (!xfs_verify_fsbno(mp, extp->ext_start + extp->ext_len - 1))
 		return false;
 
 	return true;