Re: [PATCH] qemu-nbd: Fix a memleak in qemu_nbd_client_list()

[Eric Blake <eblake@redhat.com>]

On 11/30/20 6:36 AM, Alex Chen wrote:
> When the qio_channel_socket_connect_sync() fails
> we should goto 'out' label to free the 'sioc' instead of return.
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Alex Chen <alex.chen@huawei.com>
> ---
>  qemu-nbd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

A local leak, but the only caller of qemu_nbd_client_list() is main()
which returns the value and thereby exits the program, so it is
inconsequential in the bigger picture.  I'll defer this to 6.0, and pick
it up through my NBD tree once that opens.

> 
> diff --git a/qemu-nbd.c b/qemu-nbd.c
> index a7075c5419..47587a709e 100644
> --- a/qemu-nbd.c
> +++ b/qemu-nbd.c
> @@ -181,7 +181,7 @@ static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls,
>      sioc = qio_channel_socket_new();
>      if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) {
>          error_report_err(err);
> -        return EXIT_FAILURE;
> +        goto out;
>      }
>      rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list,
>                                   &err);
> 

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org