Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: static int fill_dir_block(ext2_filsys fs,
			  blk64_t *block_nr,
			  e2_blkcnt_t blockcnt,
			  blk64_t ref_block EXT2FS_ATTR((unused)),
			  int ref_offset EXT2FS_ATTR((unused)),
			  void *priv_data)
{
	struct fill_dir_struct	*fd = (struct fill_dir_struct *) priv_data;
	struct hash_entry 	*new_array, *ent;
	struct ext2_dir_entry 	*dirent;
	char			*dir;
	unsigned int		offset, dir_offset, rec_len, name_len;
	int			hash_alg, hash_flags;

	if (blockcnt < 0)
		return 0;

	offset = blockcnt * fs->blocksize;
	if (offset + fs->blocksize > fd->inode->i_size) {
		fd->err = EXT2_ET_DIR_CORRUPTED;
		return BLOCK_ABORT;
	}

	dir = (fd->buf+offset);
	if (*block_nr == 0) {
		memset(dir, 0, fs->blocksize);
		dirent = (struct ext2_dir_entry *) dir;
		(void) ext2fs_set_rec_len(fs, fs->blocksize, dirent);
	} else {
		int flags = fs->flags;
		fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
		fd->err = ext2fs_read_dir_block4(fs, *block_nr, dir, 0,
						 fd->dir);
		fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
			    (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
		if (fd->err)
			return BLOCK_ABORT;
	}
	hash_flags = fd->inode->i_flags & EXT4_CASEFOLD_FL;
	hash_alg = fs->super->s_def_hash_version;
	if ((hash_alg <= EXT2_HASH_TEA) &&
	    (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
		hash_alg += 3;
	/* While the directory block is "hot", index it. */
	dir_offset = 0;
	while (dir_offset < fs->blocksize) {
		dirent = (struct ext2_dir_entry *) (dir + dir_offset);
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		name_len = ext2fs_dirent_name_len(dirent);
		if (((dir_offset + rec_len) > fs->blocksize) ||
		    (rec_len < 8) ||
		    ((rec_len % 4) != 0) ||
		    (name_len + 8 > rec_len)) {
			fd->err = EXT2_ET_DIR_CORRUPTED;
			return BLOCK_ABORT;
		}
		dir_offset += rec_len;
		if (dirent->inode == 0)
			continue;
		if (!fd->compress && (name_len == 1) &&
		    (dirent->name[0] == '.'))
			continue;
		if (!fd->compress && (name_len == 2) &&
		    (dirent->name[0] == '.') && (dirent->name[1] == '.')) {
			fd->parent = dirent->inode;
			continue;
		}
		if (fd->num_array >= fd->max_array) {
			new_array = realloc(fd->harray,
			    sizeof(struct hash_entry) * (fd->max_array+500));
			if (!new_array) {
				fd->err = ENOMEM;
				return BLOCK_ABORT;
			}
			fd->harray = new_array;
			fd->max_array += 500;
		}
		ent = fd->harray + fd->num_array++;
		ent->dir = dirent;
		fd->dir_size += EXT2_DIR_REC_LEN(name_len);
		ent->ino = dirent->inode;
		if (fd->compress)
			ent->hash = ent->minor_hash = 0;
		else {
			fd->err = ext2fs_dirhash2(hash_alg,
						  dirent->name, name_len,
						  fs->encoding, hash_flags,
						  fs->super->s_hash_seed,
						  &ent->hash, &ent->minor_hash);
			if (fd->err)
				return BLOCK_ABORT;
		}
	}

	return 0;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-787'], 'message': 'e2fsck: abort if there is a corrupted directory block when rehashing

In e2fsck pass 3a, when we are rehashing directories, at least in
theory, all of the directories should have had corruptions with
respect to directory entry structure fixed.  However, it's possible
(for example, if the user declined a fix) that we can reach this stage
of processing with a corrupted directory entries.

So check for that case and don't try to process a corrupted directory
block so we don't run into trouble in mutate_name() if there is a
zero-length file name.

Addresses: TALOS-2019-0973
Addresses: CVE-2019-5188
Signed-off-by: Theodore Ts'o <tytso@mit.edu>'