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realtek: fix memory leak in netevent handler

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The net_event_work struct is allocated, but only freed in a single case.
Move the allocation to the branch where it is actually needed, and free
it after the work has been done.

Fixes: 03e1d93e07 ("realtek: add driver support for routing offload")
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
This commit is contained in:
Jan Hoffmann 2023-02-08 22:53:32 +01:00 committed by Sander Vanheule
parent 1352e5da8d
commit 65b2bcbf5f
2 changed files with 18 additions and 16 deletions
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17
target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/common.c
View File

@ -1286,6 +1286,8 @@ static void rtl83xx_net_event_work_do(struct work_struct *work)
struct rtl838x_switch_priv *priv = net_work->priv;
rtl83xx_l3_nexthop_update(priv, net_work->gw_addr, net_work->mac);
kfree(net_work);
}
static int rtl83xx_netevent_event(struct notifier_block *this,
@ -1299,13 +1301,6 @@ static int rtl83xx_netevent_event(struct notifier_block *this,
priv = container_of(this, struct rtl838x_switch_priv, ne_nb);
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, rtl83xx_net_event_work_do);
net_work->priv = priv;
switch (event) {
case NETEVENT_NEIGH_UPDATE:
if (n->tbl != &arp_tbl)
@ -1314,10 +1309,16 @@ static int rtl83xx_netevent_event(struct notifier_block *this,
port = rtl83xx_port_dev_lower_find(dev, priv);
if (port < 0 || !(n->nud_state & NUD_VALID)) {
pr_debug("%s: Neigbour invalid, not updating\n", __func__);
kfree(net_work);
return NOTIFY_DONE;
}
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, rtl83xx_net_event_work_do);
net_work->priv = priv;
net_work->mac = ether_addr_to_u64(n->ha);
net_work->gw_addr = *(__be32 *) n->primary_key;

17
target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/common.c
View File

@ -1282,6 +1282,8 @@ static void rtl83xx_net_event_work_do(struct work_struct *work)
struct rtl838x_switch_priv *priv = net_work->priv;
rtl83xx_l3_nexthop_update(priv, net_work->gw_addr, net_work->mac);
kfree(net_work);
}
static int rtl83xx_netevent_event(struct notifier_block *this,
@ -1295,13 +1297,6 @@ static int rtl83xx_netevent_event(struct notifier_block *this,
priv = container_of(this, struct rtl838x_switch_priv, ne_nb);
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, rtl83xx_net_event_work_do);
net_work->priv = priv;
switch (event) {
case NETEVENT_NEIGH_UPDATE:
if (n->tbl != &arp_tbl)
@ -1310,10 +1305,16 @@ static int rtl83xx_netevent_event(struct notifier_block *this,
port = rtl83xx_port_dev_lower_find(dev, priv);
if (port < 0 || !(n->nud_state & NUD_VALID)) {
pr_debug("%s: Neigbour invalid, not updating\n", __func__);
kfree(net_work);
return NOTIFY_DONE;
}
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, rtl83xx_net_event_work_do);
net_work->priv = priv;
net_work->mac = ether_addr_to_u64(n->ha);
net_work->gw_addr = *(__be32 *) n->primary_key;