On 2018-02-08 20:23, Kevin Wolf wrote:
> If bdrv_truncate() is called, but the requested size is the same as
> before, don't call posix_fallocate(), which returns -EINVAL for length
> zero and would therefore make bdrv_truncate() fail.
> 
> The problem can be triggered by creating a zero-sized raw image with
> 'falloc' preallocation mode.
> 
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
>  block/file-posix.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)

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