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authorDarrick J. Wong <darrick.wong@oracle.com>2020-11-30 03:33:36 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2020-12-09 20:49:38 +0300
commit67d8679bd3913d2c4ec5f32ade778881b93af766 (patch)
treeca785ad160e2c21003e49693a43226059c2fabc5 /fs
parentbc525cf455dac810d28f9edd379805dc249bc5a9 (diff)
downloadlinux-67d8679bd3913d2c4ec5f32ade778881b93af766.tar.xz
xfs: improve the code that checks recovered bmap intent items
The code that validates recovered bmap 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>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_bmap_item.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index 9be61feca65b..a21a9f71c0c0 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -424,18 +424,12 @@ xfs_bui_validate(
struct xfs_bui_log_item *buip)
{
struct xfs_map_extent *bmap;
- xfs_fsblock_t startblock_fsb;
- xfs_fsblock_t inode_fsb;
/* Only one mapping operation per BUI... */
if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
return false;
bmap = &buip->bui_format.bui_extents[0];
- startblock_fsb = XFS_BB_TO_FSB(mp,
- XFS_FSB_TO_DADDR(mp, bmap->me_startblock));
- inode_fsb = XFS_BB_TO_FSB(mp, XFS_FSB_TO_DADDR(mp,
- XFS_INO_TO_FSB(mp, bmap->me_owner)));
if (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
return false;
@@ -448,13 +442,19 @@ xfs_bui_validate(
return false;
}
- if (startblock_fsb == 0 ||
- bmap->me_len == 0 ||
- inode_fsb == 0 ||
- startblock_fsb >= mp->m_sb.sb_dblocks ||
- bmap->me_len >= mp->m_sb.sb_agblocks ||
- inode_fsb >= mp->m_sb.sb_dblocks ||
- (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS))
+ if (!xfs_verify_ino(mp, bmap->me_owner))
+ return false;
+
+ if (bmap->me_startoff + bmap->me_len <= bmap->me_startoff)
+ return false;
+
+ if (bmap->me_startblock + bmap->me_len <= bmap->me_startblock)
+ return false;
+
+ if (!xfs_verify_fsbno(mp, bmap->me_startblock))
+ return false;
+
+ if (!xfs_verify_fsbno(mp, bmap->me_startblock + bmap->me_len - 1))
return false;
return true;