Re: [PATCH] qga-win: Fix guest-get-fsinfo multi-disks collection

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 27/12/23 08:15, peng.ji@smartx.com wrote:
> From: Peng Ji <peng.ji@smartx.com>
> 
> When a volume has more than one disk, all disks cannot be
> returned correctly because there is not enough malloced memory
> for disk extents, so before executing DeviceIoControl for the
> second time, get the correct size of the required memory space
> to store all disk extents.
> 
> Signed-off-by: Peng Ji <peng.ji@smartx.com>

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2075

> ---
>   qga/commands-win32.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> index 697c65507c..a1015757d8 100644
> --- a/qga/commands-win32.c
> +++ b/qga/commands-win32.c
> @@ -935,6 +935,8 @@ static GuestDiskAddressList *build_guest_disk_info(char *guid, Error **errp)
>           DWORD last_err = GetLastError();
>           if (last_err == ERROR_MORE_DATA) {
>               /* Try once more with big enough buffer */
> +            size = sizeof(VOLUME_DISK_EXTENTS) +
> +               (sizeof(DISK_EXTENT) * (extents->NumberOfDiskExtents - 1));
>               g_free(extents);
>               extents = g_malloc0(size);
>               if (!DeviceIoControl(