libext2fs: fix bad cast which causes problems for file systems > 512EB

If the number of block groups exceeds 2**32, a bad cast would lead to
a bogus "Not enough space to build proposed filesystem while setting
up superblock" failure.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index 2875f97..b050a0a 100644 (file)
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -248,7 +248,7 @@ errcode_t ext2fs_initialize(const char *name, int flags,
        }
 
 retry:
-       fs->group_desc_count = (blk_t) ext2fs_div64_ceil(
+       fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil(
                ext2fs_blocks_count(super) - super->s_first_data_block,
                EXT2_BLOCKS_PER_GROUP(super));
        if (fs->group_desc_count == 0) {