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vxlan: fix a potential issue when create a new vxlan fdb entry.

Browse source 
vxlan_fdb_append may return error, so add the proper check,
otherwise it will cause memory leak.

Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>

Changes in v2:
  - Unnecessary to initialize rc to zero.
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haishuang Yan 2016-11-29 09:59:36 +08:00 committed by David S. Miller
parent f92a80a997
commit 17b463654f
1 changed files with 7 additions and 3 deletions
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10
drivers/net/vxlan.c
View file

@ -611,6 +611,7 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
struct vxlan_rdst *rd = NULL;
struct vxlan_fdb *f;
int notify = 0;
int rc;
f = __vxlan_find_mac(vxlan, mac);
if (f) {
@ -641,8 +642,7 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
if ((flags & NLM_F_APPEND) &&
(is_multicast_ether_addr(f->eth_addr) ||
is_zero_ether_addr(f->eth_addr))) {
int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
&rd);
rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
if (rc < 0)
return rc;
@ -673,7 +673,11 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
INIT_LIST_HEAD(&f->remotes);
memcpy(f->eth_addr, mac, ETH_ALEN);
vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
if (rc < 0) {
kfree(f);
return rc;
}
++vxlan->addrcnt;
hlist_add_head_rcu(&f->hlist,