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net: macsec: fix potential resource leak in macsec_add_rxsa() and macsec_add_txsa()

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init_rx_sa() allocates relevant resource for rx_sa->stats and rx_sa->
key.tfm with alloc_percpu() and macsec_alloc_tfm(). When some error
occurs after init_rx_sa() is called in macsec_add_rxsa(), the function
released rx_sa with kfree() without releasing rx_sa->stats and rx_sa->
key.tfm, which will lead to a resource leak.

We should call macsec_rxsa_put() instead of kfree() to decrease the ref
count of rx_sa and release the relevant resource if the refcount is 0.
The same bug exists in macsec_add_txsa() for tx_sa as well. This patch
fixes the above two bugs.

Fixes: 3cf3227a21 ("net: macsec: hardware offloading infrastructure")
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jianglei Nie 2022-07-22 17:29:02 +08:00 committed by David S. Miller
parent 20a854616d
commit c7b205fbbf
1 changed files with 2 additions and 2 deletions
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4
drivers/net/macsec.c
View file

@ -1844,7 +1844,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
return 0;
cleanup:
kfree(rx_sa);
macsec_rxsa_put(rx_sa);
rtnl_unlock();
return err;
}
@ -2087,7 +2087,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
cleanup:
secy->operational = was_operational;
kfree(tx_sa);
macsec_txsa_put(tx_sa);
rtnl_unlock();
return err;
}