net: qualcomm: rmnet: Fix leaks in failure scenarios

Patch 1 fixes a leak in transmit path where a skb cannot be transmitted due to insufficient headroom to stamp the map header. Patch 2 fixes a leak in rmnet_newlink() failure because the rmnet endpoint was never freed

Subash Abhinov Kasiviswanathan (2):
net: qualcomm: rmnet: Fix leak on transmit failure
net: qualcomm: rmnet: Fix leak in device creation failure

 drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c   | 1 +
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

1.9.1

If a skb in transmit path does not have sufficient headroom to add the map header, the skb is not sent out and is never freed.

---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

index f7d1744..ea0d986 100644
@@ -133,12 +133,12 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
 
 	if (skb_headroom(skb) < required_headroom) {
 		if (pskb_expand_head(skb, required_headroom, 0, GFP_KERNEL))
-			return RMNET_MAP_CONSUMED;
+			goto fail;
 	}
 
 	map_header = rmnet_map_add_map_header(skb, additional_header_len, 0);
 	if (!map_header)
-		return RMNET_MAP_CONSUMED;
+		goto fail;
 
 	if (port->egress_data_format & RMNET_EGRESS_FORMAT_MUXING) {
 		if (mux_id == 0xff)

@@ -150,6 +150,10 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
 	skb->protocol = htons(ETH_P_MAP);
 
 	return RMNET_MAP_SUCCESS;
+
+fail:
+	kfree_skb(skb);
+	return RMNET_MAP_CONSUMED;
 }
 
 static void

1.9.1

If the rmnet device creation fails in the newlink either while registering with the physical device or after subsequent operations, the rmnet endpoint information is never freed.

---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c | 1 +
 1 file changed, 1 insertion(+)

index 71bee1a..df21e90 100644
@@ -195,6 +195,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 err1:
 	rmnet_unregister_real_device(real_dev, port);
 err0:
+	kfree(ep);
 	return err;
 }
 

1.9.1

From: Subash Abhinov Kasiviswanathan <[email protected]>
Date: Tue, 5 Dec 2017 13:41:16 -0700

Series applied, thank you.