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path: root/fs/xfs/xfs_bmap.c
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Diffstat (limited to 'fs/xfs/xfs_bmap.c')
-rw-r--r--fs/xfs/xfs_bmap.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 7796a0c140eb..db289050692f 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4524,6 +4524,22 @@ xfs_bmap_one_block(
return rval;
}
+STATIC int
+xfs_bmap_sanity_check(
+ struct xfs_mount *mp,
+ struct xfs_buf *bp,
+ int level)
+{
+ struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
+
+ if (be32_to_cpu(block->bb_magic) != XFS_BMAP_MAGIC ||
+ be16_to_cpu(block->bb_level) != level ||
+ be16_to_cpu(block->bb_numrecs) == 0 ||
+ be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
+ return 0;
+ return 1;
+}
+
/*
* Read in the extents to if_extents.
* All inode fields are set up by caller, we just traverse the btree
@@ -4575,7 +4591,7 @@ xfs_bmap_read_extents(
return error;
block = XFS_BUF_TO_BLOCK(bp);
XFS_WANT_CORRUPTED_GOTO(
- XFS_BMAP_SANITY_CHECK(mp, block, level),
+ xfs_bmap_sanity_check(mp, bp, level),
error0);
if (level == 0)
break;
@@ -4611,7 +4627,7 @@ xfs_bmap_read_extents(
goto error0;
}
XFS_WANT_CORRUPTED_GOTO(
- XFS_BMAP_SANITY_CHECK(mp, block, 0),
+ xfs_bmap_sanity_check(mp, bp, 0),
error0);
/*
* Read-ahead the next leaf block, if any.
@@ -6287,7 +6303,7 @@ xfs_bmap_check_leaf_extents(
goto error_norelse;
block = XFS_BUF_TO_BLOCK(bp);
XFS_WANT_CORRUPTED_GOTO(
- XFS_BMAP_SANITY_CHECK(mp, block, level),
+ xfs_bmap_sanity_check(mp, bp, level),
error0);
if (level == 0)
break;