From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
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@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
---
fs/xfs/xfs_extfree_item.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
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;
