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[ext2fs] check for the maximum ext2/ext3 volume size

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* Suggested by Marcos Mello
* Closes #1524
This commit is contained in:
Pete Batard 2020-04-28 18:34:45 +01:00
parent 8a59238022
commit 083b3db34c
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GPG key ID: 38E0CF5E69EDD671
2 changed files with 13 additions and 5 deletions
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src/format_ext.c
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@ -312,6 +312,14 @@ BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LP
features.s_log_cluster_size = features.s_log_block_size;
size /= BlockSize;
// ext2 and ext3 have a can only accomodate up to Blocksize * 2^32 sized volumes
if (((strcmp(FSName, FileSystemLabel[FS_EXT2]) == 0) || (strcmp(FSName, FileSystemLabel[FS_EXT3]) == 0)) &&
(size >= 0x100000000ULL)) {
FormatStatus = ext2_last_winerror(ERROR_INVALID_VOLUME_SIZE);
uprintf("Volume size is too large for ext2 or ext3");
goto out;
}
// Set the blocks, reserved blocks and inodes
ext2fs_blocks_count_set(&features, size);
ext2fs_r_blocks_count_set(&features, (blk64_t)(reserve_ratio * size));