linux-kernel - [PATCH] nfp: flower: prevent memory leak in nfp_flower_spawn_phy

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Message-Id: <20190925182405.31287-1-navid.emamdoost@gmail.com>
Date:   Wed, 25 Sep 2019 13:24:02 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, kjlu@....edu, smccaman@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "David S. Miller" <davem@...emloft.net>,
        John Hurley <john.hurley@...ronome.com>,
        Simon Horman <simon.horman@...ronome.com>,
        Pieter Jansen van Vuuren 
        <pieter.jansenvanvuuren@...ronome.com>,
        Fred Lotter <frederik.lotter@...ronome.com>,
        oss-drivers@...ronome.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] nfp: flower: prevent memory leak in nfp_flower_spawn_phy_reprs

In nfp_flower_spawn_phy_reprs, in the for loop over eth_tbl if any of
intermediate allocations or initializations fail memory is leaked.
requiered releases are added.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 drivers/net/ethernet/netronome/nfp/flower/main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/main.c b/drivers/net/ethernet/netronome/nfp/flower/main.c
index 7a20447cca19..91a47899220f 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/main.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/main.c
@@ -515,6 +515,7 @@ nfp_flower_spawn_phy_reprs(struct nfp_app *app, struct nfp_flower_priv *priv)
 		repr_priv = kzalloc(sizeof(*repr_priv), GFP_KERNEL);
 		if (!repr_priv) {
 			err = -ENOMEM;
+			nfp_repr_free(repr);
 			goto err_reprs_clean;
 		}
 
@@ -525,11 +526,13 @@ nfp_flower_spawn_phy_reprs(struct nfp_app *app, struct nfp_flower_priv *priv)
 		port = nfp_port_alloc(app, NFP_PORT_PHYS_PORT, repr);
 		if (IS_ERR(port)) {
 			err = PTR_ERR(port);
+			kfree(repr_priv);
 			nfp_repr_free(repr);
 			goto err_reprs_clean;
 		}
 		err = nfp_port_init_phy_port(app->pf, app, port, i);
 		if (err) {
+			kfree(repr_priv);
 			nfp_port_free(port);
 			nfp_repr_free(repr);
 			goto err_reprs_clean;
@@ -542,6 +545,7 @@ nfp_flower_spawn_phy_reprs(struct nfp_app *app, struct nfp_flower_priv *priv)
 		err = nfp_repr_init(app, repr,
 				    cmsg_port_id, port, priv->nn->dp.netdev);
 		if (err) {
+			kfree(repr_priv);
 			nfp_port_free(port);
 			nfp_repr_free(repr);
 			goto err_reprs_clean;
-- 
2.17.1