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/x25/af_x25.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index c8a8297cd4b8..6177479c7de9 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1082,7 +1082,7 @@ static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, { struct sock *sk = sock->sk; struct x25_sock *x25 = x25_sk(sk); - struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_x25 *, usx25, msg->msg_name); struct sockaddr_x25 sx25; struct sk_buff *skb; unsigned char *asmptr; @@ -1258,7 +1258,7 @@ static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, { struct sock *sk = sock->sk; struct x25_sock *x25 = x25_sk(sk); - struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_x25 *, sx25, msg->msg_name); size_t copied; int qbit, header_len; struct sk_buff *skb; -- cgit v1.2.3-55-g7522