RDMA/cxgb4: Fix possible memory leak in RX_PKT processing

If cxgb4_ofld_send() returns < 0, then send_fw_pass_open_req() must
free the request skb and the saved skb with the tcp header.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index e1fc5c5..773d010 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -3204,6 +3204,7 @@ static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
        struct sk_buff *req_skb;
        struct fw_ofld_connection_wr *req;
        struct cpl_pass_accept_req *cpl = cplhdr(skb);
+       int ret;
 
        req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
        req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
@@ -3240,7 +3241,13 @@ static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
        req->cookie = (unsigned long)skb;
 
        set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
-       cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
+       ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
+       if (ret < 0) {
+               pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
+                      ret);
+               kfree_skb(skb);
+               kfree_skb(req_skb);
+       }
 }
 
 /*