[ 056/133] netrom: copy_datagram_iovec can fail

From: Greg Kroah-Hartman
Date: Wed Oct 10 2012 - 18:59:39 EST


3.5-stable review patch. If anyone has any objections, please let me know.

------------------


From: Alan Cox <alan@xxxxxxxxxxxxxxx>

[ Upstream commit 6cf5c951175abcec4da470c50565cc0afe6cd11d ]

Check for an error from this and if so bail properly.

Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netrom/af_netrom.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1169,7 +1169,12 @@ static int nr_recvmsg(struct kiocb *iocb
msg->msg_flags |= MSG_TRUNC;
}

- skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ er = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ if (er < 0) {
+ skb_free_datagram(sk, skb);
+ release_sock(sk);
+ return er;
+ }

if (sax != NULL) {
sax->sax25_family = AF_NETROM;


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