On Wed 17 Jun 2020 08:27:25 PM CEST, Connor Kuehl wrote:
> Providing an empty string for the backing file parameter like so:
>
>       qemu-img create -f qcow2 -b '' /tmp/foo
>
> allows the flow of control to reach and subsequently fail an assert
> statement because passing an empty string to
>
>       bdrv_get_full_backing_filename_from_filename()
>
> simply results in NULL being returned without an error being raised.
>
> To fix this, let's check for an empty string when getting the value from
> the opts list.
>
> Reported-by: Attila Fazekas <afaze...@redhat.com>
> Fixes: https://bugzilla.redhat.com/1809553
> Signed-off-by: Connor Kuehl <cku...@redhat.com>

Reviewed-by: Alberto Garcia <be...@igalia.com>

Berto

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