+
+ diff -urN oldtree/fs/ext2/super.c newtree/fs/ext2/super.c --- oldtree/fs/ext2/super.c 2006-08-18 15:01:22.000000000 -0400 +++ newtree/fs/ext2/super.c 2006-08-20 04:43:50.405523250 -0400 @@ -544,17 +544,24 @@ int i; int desc_block = 0; struct ext2_sb_info *sbi = EXT2_SB(sb); - unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block); + unsigned long first_block = le32_to_cpu(sbi->s_es->s_first_data_block); + unsigned long last_block; struct ext2_group_desc * gdp = NULL; ext2_debug ("Checking group descriptors"); for (i = 0; i < sbi->s_groups_count; i++) { + if (i == sbi->s_groups_count - 1) + last_block = sbi->s_es->s_blocks_count - 1; + else + last_block = first_block + + (EXT2_BLOCKS_PER_GROUP(sb) - 1); + if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) gdp = (struct ext2_group_desc *) sbi->s_group_desc[desc_block++]->b_data; - if (le32_to_cpu(gdp->bg_block_bitmap) < block || - le32_to_cpu(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb)) + if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || + le32_to_cpu(gdp->bg_block_bitmap) > last_block) { ext2_error (sb, "ext2_check_descriptors", "Block bitmap for group %d" @@ -562,8 +569,8 @@ i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap)); return 0; } - if (le32_to_cpu(gdp->bg_inode_bitmap) < block || - le32_to_cpu(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb)) + if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || + le32_to_cpu(gdp->bg_inode_bitmap) > last_block) { ext2_error (sb, "ext2_check_descriptors", "Inode bitmap for group %d" @@ -571,9 +578,9 @@ i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap)); return 0; } - if (le32_to_cpu(gdp->bg_inode_table) < block || - le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >= - block + EXT2_BLOCKS_PER_GROUP(sb)) + if (le32_to_cpu(gdp->bg_inode_table) < first_block || + le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group > + last_block) { ext2_error (sb, "ext2_check_descriptors", "Inode table for group %d" @@ -581,7 +588,7 @@ i, (unsigned long) le32_to_cpu(gdp->bg_inode_table)); return 0; } - block += EXT2_BLOCKS_PER_GROUP(sb); + first_block += EXT2_BLOCKS_PER_GROUP(sb); gdp++; } return 1; @@ -860,10 +867,9 @@ if (EXT2_BLOCKS_PER_GROUP(sb) == 0) goto cantfind_ext2; - sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) - - le32_to_cpu(es->s_first_data_block) + - EXT2_BLOCKS_PER_GROUP(sb) - 1) / - EXT2_BLOCKS_PER_GROUP(sb); + sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - + le32_to_cpu(es->s_first_data_block) - 1) + / EXT2_BLOCKS_PER_GROUP(sb)) + 1; db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) / EXT2_DESC_PER_BLOCK(sb); sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);