Re: [PATCH 2/2] hw/nvme: fix memory leak in nvme_dsm

[Klaus Jensen]

On Apr 12 11:54, Philippe Mathieu-Daudé wrote:
> On 11/4/23 21:04, Klaus Jensen wrote:
> > From: Klaus Jensen <k.jensen@samsung.com>
> > 
> > The iocb (and the allocated memory to hold LBA ranges) leaks if reading
> > the LBA ranges fails.
> > 
> > Fix this by adding a free and an unref of the iocb.
> > 
> > Reported-by: Coverity (CID 1508281)
> > Fixes: d7d1474fd85d ("hw/nvme: reimplement dsm to allow cancellation")
> > Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> > ---
> >   hw/nvme/ctrl.c | 3 +++
> >   1 file changed, 3 insertions(+)
> > 
> > diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> > index 8b7be1420912..ac24eeb5ed5a 100644
> > --- a/hw/nvme/ctrl.c
> > +++ b/hw/nvme/ctrl.c
> > @@ -2619,6 +2619,9 @@ static uint16_t nvme_dsm(NvmeCtrl *n, NvmeRequest 
> > *req)
> >           status = nvme_h2c(n, (uint8_t *)iocb->range, sizeof(NvmeDsmRange) 
> > * nr,
> >                             req);
> >           if (status) {
> > +            g_free(iocb->range);
> > +            qemu_aio_unref(iocb);
> 
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> 
> I note the qemu_aio_FOO() functions are not documented.
> 

As-in, "you are not supposed to use them" or "this should be documented
at some point"?

Thanks for your reviews Philippe, you're a life-saver :)

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