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-rw-r--r--fs/btrfs/tree-checker.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 9e0e0ae2288c..43f905ab0a18 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -1233,7 +1233,8 @@ static void extent_err(const struct extent_buffer *eb, int slot,
}
static int check_extent_item(struct extent_buffer *leaf,
- struct btrfs_key *key, int slot)
+ struct btrfs_key *key, int slot,
+ struct btrfs_key *prev_key)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_extent_item *ei;
@@ -1453,6 +1454,26 @@ static int check_extent_item(struct extent_buffer *leaf,
total_refs, inline_refs);
return -EUCLEAN;
}
+
+ if ((prev_key->type == BTRFS_EXTENT_ITEM_KEY) ||
+ (prev_key->type == BTRFS_METADATA_ITEM_KEY)) {
+ u64 prev_end = prev_key->objectid;
+
+ if (prev_key->type == BTRFS_METADATA_ITEM_KEY)
+ prev_end += fs_info->nodesize;
+ else
+ prev_end += prev_key->offset;
+
+ if (unlikely(prev_end > key->objectid)) {
+ extent_err(leaf, slot,
+ "previous extent [%llu %u %llu] overlaps current extent [%llu %u %llu]",
+ prev_key->objectid, prev_key->type,
+ prev_key->offset, key->objectid, key->type,
+ key->offset);
+ return -EUCLEAN;
+ }
+ }
+
return 0;
}
@@ -1621,7 +1642,7 @@ static int check_leaf_item(struct extent_buffer *leaf,
break;
case BTRFS_EXTENT_ITEM_KEY:
case BTRFS_METADATA_ITEM_KEY:
- ret = check_extent_item(leaf, key, slot);
+ ret = check_extent_item(leaf, key, slot, prev_key);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
case BTRFS_SHARED_DATA_REF_KEY: