if ((group == fs->group_desc_count - 1) && (max & 7)) {
n = 0;
for (b = (fs->super->s_first_data_block +
- (fs->super->s_blocks_per_group * group));
+ ((blk64_t) fs->super->s_blocks_per_group *
+ group));
b < ext2fs_blocks_count(fs->super);
b += EXT2FS_CLUSTER_RATIO(fs)) {
if (ext2fs_test_block_bitmap2(fs->block_map, b))