net: wan: fix error return code of uhdlc_init()

[ Upstream commit 62765d39553cfd1ad340124fe1e280450e8c89e2 ]

When priv->rx_skbuff or priv->tx_skbuff is NULL, no error return code of
uhdlc_init() is assigned.
To fix this bug, ret is assigned with -ENOMEM in these cases.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index 87bf05a81db50f88f07b2a2eb1f56d5d4f3d506c..fc7d28edee077a4c973d87d2018b0a30f53e2b03 100644 (file)
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -169,13 +169,17 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
 
        priv->rx_skbuff = kzalloc(priv->rx_ring_size * sizeof(*priv->rx_skbuff),
                                  GFP_KERNEL);
-       if (!priv->rx_skbuff)
+       if (!priv->rx_skbuff) {
+               ret = -ENOMEM;
                goto free_ucc_pram;
+       }
 
        priv->tx_skbuff = kzalloc(priv->tx_ring_size * sizeof(*priv->tx_skbuff),
                                  GFP_KERNEL);
-       if (!priv->tx_skbuff)
+       if (!priv->tx_skbuff) {
+               ret = -ENOMEM;
                goto free_rx_skbuff;
+       }
 
        priv->skb_curtx = 0;
        priv->skb_dirtytx = 0;