caif: Plug memory leak for checksum error

In case of checksum error, the framing layer returns -EILSEQ, but
does not free the packet. Plug this hole by freeing the packet if
-EILSEQ is returned.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
index 366ca0fb7a29..682c0fedf360 100644
--- a/net/caif/caif_dev.c
+++ b/net/caif/caif_dev.c
@@ -142,6 +142,7 @@ static int receive(struct sk_buff *skb, struct net_device *dev,
 {
         struct cfpkt *pkt;
         struct caif_device_entry *caifd;
+        int err;
 
         pkt = cfpkt_fromnative(CAIF_DIR_IN, skb);
 
@@ -159,7 +160,11 @@ static int receive(struct sk_buff *skb, struct net_device *dev,
         caifd_hold(caifd);
         rcu_read_unlock();
 
-        caifd->layer.up->receive(caifd->layer.up, pkt);
+        err = caifd->layer.up->receive(caifd->layer.up, pkt);
+
+        /* For -EILSEQ the packet is not freed so so it now */
+        if (err == -EILSEQ)
+                cfpkt_destroy(pkt);
 
         /* Release reference to stack upwards */
         caifd_put(caifd);