netdev - [PATCH] netrom: copy_datagram

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Message-ID: <20120904141315.26374.38822.stgit@localhost.localdomain>
Date:	Tue, 04 Sep 2012 15:13:18 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	netdev@...r.kernel.org
Subject: [PATCH] netrom: copy_datagram_iovec can fail

From: Alan Cox <alan@...ux.intel.com>

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

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 net/netrom/af_netrom.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 06592d8..1b9024e 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1169,7 +1169,12 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
 		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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