linux-kernel - [PATCH] drivers: vxlan: vnifilter: free percpu vni stats on error path

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Date:   Thu,  3 Aug 2023 22:38:32 +0300
From:   Fedor Pchelkin <pchelkin@...ras.ru>
To:     Roopa Prabhu <roopa@...dia.com>
Cc:     Fedor Pchelkin <pchelkin@...ras.ru>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexey Khoroshilov <khoroshilov@...ras.ru>,
        lvc-project@...uxtesting.org
Subject: [PATCH] drivers: vxlan: vnifilter: free percpu vni stats on error path

In case rhashtable_lookup_insert_fast() fails inside vxlan_vni_add(), the
allocated percpu vni stats are not freed on the error path.

Free them on the rhashtable_lookup_insert_fast() error path in
vxlan_vni_add().

Found by Linux Verification Center (linuxtesting.org).

Fixes: 4095e0e1328a ("drivers: vxlan: vnifilter: per vni stats")
Signed-off-by: Fedor Pchelkin <pchelkin@...ras.ru>
---
 drivers/net/vxlan/vxlan_vnifilter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/vxlan/vxlan_vnifilter.c b/drivers/net/vxlan/vxlan_vnifilter.c
index a3de081cda5e..321cd0b450cc 100644
--- a/drivers/net/vxlan/vxlan_vnifilter.c
+++ b/drivers/net/vxlan/vxlan_vnifilter.c
@@ -740,6 +740,7 @@ static int vxlan_vni_add(struct vxlan_dev *vxlan,
 					    &vninode->vnode,
 					    vxlan_vni_rht_params);
 	if (err) {
+		free_percpu(vninode->stats);
 		kfree(vninode);
 		return err;
 	}
-- 
2.41.0