[dpdk-dev] [PATCH] net/af_xdp: fix memzone leak in error path

[wangyunjian]

> -----Original Message-----
> From: Ferruh Yigit [mailto:ferruh.yigit at amd.com]
> Sent: Monday, December 4, 2023 10:10 PM
> To: wangyunjian <wangyunjian at huawei.com>; dev at dpdk.org
> Cc: ciara.loftus at intel.com; qi.z.zhang at intel.com; xudingke
> <xudingke at huawei.com>; Lilijun (Jerry) <jerry.lilijun at huawei.com>;
> stable at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] net/af_xdp: fix memzone leak in error path
> 
> On 12/1/2023 8:03 AM, Yunjian Wang wrote:
> > In xdp_umem_configure() allocated memzone for the 'umem', we should
> > free it when xsk_umem__create() call fails, otherwise it will lead to
> > memory zone leak.
> >
> > Fixes: f1debd77efaf ("net/af_xdp: introduce AF_XDP PMD")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
> > ---
> >  drivers/net/af_xdp/rte_eth_af_xdp.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c
> > b/drivers/net/af_xdp/rte_eth_af_xdp.c
> > index 2a20a6960c..2a1fdafb3c 100644
> > --- a/drivers/net/af_xdp/rte_eth_af_xdp.c
> > +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
> > @@ -1229,6 +1229,7 @@ xsk_umem_info *xdp_umem_configure(struct
> > pmd_internals *internals,
> >
> >  	if (ret) {
> >  		AF_XDP_LOG(ERR, "Failed to create umem\n");
> > +		rte_memzone_free(mz);
> >
> 
> Doesn't 'xdp_umem_destroy()', in the label 'err', already free it?

In this case, 'mz' is not assigned to 'umem->mz'. Therefore,
the'xdp_umem_destroy()' does not free 'mz'.

Thanks,
Yunjian

> 
> >  		goto err;
> >  	}
> >  	umem->mz = mz;