Re: [Qemu-devel] [PATCH v4] vmdk: Fix integer overflow in offset calculation

[Max Reitz <mreitz@redhat.com>]

On 22.09.2014 09:15, Fam Zheng wrote:
> This fixes the bug introduced by commit c6ac36e (vmdk: Optimize cluster
> allocation).
>
> $ ~/build/master/qemu-io /stor/vm/arch.vmdk -c 'write 2G 1k'
> write failed: Invalid argument
>
> Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> Signed-off-by: Fam Zheng <famz@redhat.com>
>
> ---
> v4: Fix typo in file header: 1014 -> 2014.
> v3: A new case 105 instead of embedding in 005. (Max)
> ---
>   block/vmdk.c               |  2 +-
>   tests/qemu-iotests/105     | 70 ++++++++++++++++++++++++++++++++++++++++++++++
>   tests/qemu-iotests/105.out | 21 ++++++++++++++
>   3 files changed, 92 insertions(+), 1 deletion(-)
>   create mode 100755 tests/qemu-iotests/105
>   create mode 100644 tests/qemu-iotests/105.out

I'm sorry, but you didn't add the respective line to the group file. 
Also, the reference output is wrong; for the latter two accesses, it 
should be "at offset 15393162788864" (14T) instead of "at offset 
4398046511104" (4T).

Those changes are trivial, though, so with an appropriate line in 
tests/qemu-iotests/group and %s/4398046511104/15393162788864/ in 
tests/qemu-iotests/105.out:

Reviewed-by: Max Reitz <mreitz@redhat.com>