From 342dfc306fb32155314dad277f3c3686b83fb9f1 Mon Sep 17 00:00:00 2001 From: Steffen Hurrle Date: Fri, 17 Jan 2014 22:53:15 +0100 Subject: net: add build-time checks for msg->msg_name size This is a follow-up patch to f3d3342602f8bc ("net: rework recvmsg handler msg_name and msg_namelen logic"). DECLARE_SOCKADDR validates that the structure we use for writing the name information to is not larger than the buffer which is reserved for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR consistently in sendmsg code paths. Signed-off-by: Steffen Hurrle Suggested-by: Hannes Frederic Sowa Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/ipx/af_ipx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipx') diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c index e096025b477f..994e28bfb32e 100644 --- a/net/ipx/af_ipx.c +++ b/net/ipx/af_ipx.c @@ -1707,7 +1707,7 @@ static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock, { struct sock *sk = sock->sk; struct ipx_sock *ipxs = ipx_sk(sk); - struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name); struct sockaddr_ipx local_sipx; int rc = -EINVAL; int flags = msg->msg_flags; @@ -1774,7 +1774,7 @@ static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock, { struct sock *sk = sock->sk; struct ipx_sock *ipxs = ipx_sk(sk); - struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name); struct ipxhdr *ipx = NULL; struct sk_buff *skb; int copied, rc; -- cgit v1.2.3