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vmdk: Check for overhead when opening

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Report an error if file size is even smaller than metadata.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2014-01-21 15:07:43 +08:00 • committed by Kevin Wolf
parent 46bae92713
commit 34ceed81f9
3 changed files with 18 additions and 0 deletions
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7
block/vmdk.c
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@ -640,6 +640,13 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
}
if (bdrv_getlength(file) <
le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE) {
error_report("File truncated, expecting at least %lld bytes",
le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE);
return -EINVAL;
}
ret = vmdk_add_extent(bs, file, false,
le64_to_cpu(header.capacity),
le64_to_cpu(header.gd_offset) << 9,