On 20/09/2016 11:37, Tomáš Golembiovský wrote:
> When --offset is set the apparent device size has to be adjusted
> accordingly. Otherwise client may request read/write beyond the file end
> which would fail.
>
> Signed-off-by: Tomáš Golembiovský <tgole...@redhat.com>
> ---
> qemu-nbd.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/qemu-nbd.c b/qemu-nbd.c
> index 99297a5..629bce1 100644
> --- a/qemu-nbd.c
> +++ b/qemu-nbd.c
> @@ -901,6 +901,13 @@ int main(int argc, char **argv)
> exit(EXIT_FAILURE);
> }
>
> + if (dev_offset >= fd_size) {
> + error_report("Offset (%lu) has to be smaller than the image size
> (%lu)",
> + dev_offset, fd_size);
> + exit(EXIT_FAILURE);
> + }
> + fd_size -= dev_offset;
> +
> if (partition != -1) {
> ret = find_partition(blk, partition, &dev_offset, &fd_size);
> if (ret < 0) {
>
Reviewed-by: Paolo Bonzini <pbonz...@redhat.com>
