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authorÍñigo Huguet <ihuguet@redhat.com>2021-05-05 14:54:50 +0200
committerDavid S. Miller <davem@davemloft.net>2021-05-05 12:46:00 -0700
commit52bfcdd87e83d9e69d22da5f26b1512ffc81deed (patch)
treee240196573dbd0c9a39e43fd19652ca9a328bd93 /drivers
parentf941d686e602163faca0c90568cca6ead3ca41b3 (diff)
net:CXGB4: fix leak if sk_buff is not used
An sk_buff is allocated to send a flow control message, but it's not sent in all cases: in case the state is not appropiate to send it or if it can't be enqueued. In the first of these 2 cases, the sk_buff was discarded but not freed, producing a memory leak. Signed-off-by: Íñigo Huguet <ihuguet@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/sge.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 256fae15e032..1e5f2edb70cf 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2563,12 +2563,12 @@ int cxgb4_ethofld_send_flowc(struct net_device *dev, u32 eotid, u32 tc)
spin_lock_bh(&eosw_txq->lock);
if (tc != FW_SCHED_CLS_NONE) {
if (eosw_txq->state != CXGB4_EO_STATE_CLOSED)
- goto out_unlock;
+ goto out_free_skb;
next_state = CXGB4_EO_STATE_FLOWC_OPEN_SEND;
} else {
if (eosw_txq->state != CXGB4_EO_STATE_ACTIVE)
- goto out_unlock;
+ goto out_free_skb;
next_state = CXGB4_EO_STATE_FLOWC_CLOSE_SEND;
}
@@ -2604,17 +2604,19 @@ int cxgb4_ethofld_send_flowc(struct net_device *dev, u32 eotid, u32 tc)
eosw_txq_flush_pending_skbs(eosw_txq);
ret = eosw_txq_enqueue(eosw_txq, skb);
- if (ret) {
- dev_consume_skb_any(skb);
- goto out_unlock;
- }
+ if (ret)
+ goto out_free_skb;
eosw_txq->state = next_state;
eosw_txq->flowc_idx = eosw_txq->pidx;
eosw_txq_advance(eosw_txq, 1);
ethofld_xmit(dev, eosw_txq);
-out_unlock:
+ spin_unlock_bh(&eosw_txq->lock);
+ return 0;
+
+out_free_skb:
+ dev_consume_skb_any(skb);
spin_unlock_bh(&eosw_txq->lock);
return ret;
}