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-rw-r--r--net/netrom/af_netrom.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index cba7849de98e..6d9c58ec56ac 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1037,6 +1037,10 @@ static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
unsigned char *asmptr;
int size;
+ /* Netrom empty data frame has no meaning : don't send */
+ if (len == 0)
+ return 0;
+
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
return -EINVAL;
@@ -1167,6 +1171,11 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
skb_reset_transport_header(skb);
copied = skb->len;
+ /* NetRom empty data frame has no meaning : ignore it */
+ if (copied == 0) {
+ goto out;
+ }
+
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
@@ -1182,7 +1191,7 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
msg->msg_namelen = sizeof(*sax);
- skb_free_datagram(sk, skb);
+out: skb_free_datagram(sk, skb);
release_sock(sk);
return copied;