fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
+ /*
+ * Make sure the item contains at least inline header, so the file
+ * extent type is not some garbage.
+ */
+ if (item_size < BTRFS_FILE_EXTENT_INLINE_DATA_START) {
+ file_extent_err(leaf, slot,
+ "invalid item size, have %u expect [%lu, %u)",
+ item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START,
+ SZ_4K);
+ return -EUCLEAN;
+ }
if (btrfs_file_extent_type(leaf, fi) >= BTRFS_NR_FILE_EXTENT_TYPES) {
file_extent_err(leaf, slot,
"invalid type for file extent, have %u expect range [0, %u]",