Re: [PULL 13/27] hw/xen: Add xenstore operations to allow redirection to internal emulation

[David Woodhouse]

On Tue, 2023-04-04 at 18:35 +0100, Peter Maydell wrote:
> On Tue, 7 Mar 2023 at 18:27, David Woodhouse <dwmw2@infradead.org>
> wrote:
> > 
> > From: Paul Durrant <pdurrant@amazon.com>
> > 
> > Signed-off-by: Paul Durrant <pdurrant@amazon.com>
> > Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
> > Reviewed-by: Paul Durrant <paul@xen.org>
> > ---
> 
> Hi; Coverity points out a memory leak in this code (CID 1508098):
> 
> > +static struct qemu_xs_handle *libxenstore_open(void)
> > +{
> > +    struct xs_handle *xsh = xs_open(0);
> > +    struct qemu_xs_handle *h = g_new0(struct qemu_xs_handle, 1);
> 
> Here we allocate memory...
> 
> > +
> > +    if (!xsh) {
> > +        return NULL;
> 
> ...but here we can return without freeing it...
> 
> > +    }
> > +
> > +    h = g_new0(struct qemu_xs_handle, 1);
> 
> ...and here we allocate a second time and overwrite the
> pointer to the first allocation.
> 
> Deleting the first call to g_new0() would fix both of these.

Indeed, thanks. Do you want a 

Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>

or would you prefer me to submit the actual patch as described?

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