chtls: Fix potential resource leak

The dst entry should be released if no neighbour is found. Goto label
free_dst to fix the issue. Besides, the check of ndev against NULL is
redundant.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Link: https://lore.kernel.org/r/20210121145738.51091-1-bianpan2016@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_cm.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_cm.c
index e5cfbe1..19dc7dc 100644 (file)
--- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_cm.c
+++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_cm.c
@@ -1158,11 +1158,9 @@ static struct sock *chtls_recv_sock(struct sock *lsk,
 #endif
        }
        if (!n || !n->dev)
-               goto free_sk;
+               goto free_dst;
 
        ndev = n->dev;
-       if (!ndev)
-               goto free_dst;
        if (is_vlan_dev(ndev))
                ndev = vlan_dev_real_dev(ndev);
 
@@ -1250,7 +1248,8 @@ static struct sock *chtls_recv_sock(struct sock *lsk,
 free_csk:
        chtls_sock_release(&csk->kref);
 free_dst:
-       neigh_release(n);
+       if (n)
+               neigh_release(n);
        dst_release(dst);
 free_sk:
        inet_csk_prepare_forced_close(newsk);