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/irda/af_irda.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/irda') diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c index 73baf9b346b6..54747c25c86c 100644 --- a/net/irda/af_irda.c +++ b/net/irda/af_irda.c @@ -1652,7 +1652,7 @@ static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock, /* Check if an address was specified with sendto. Jean II */ if (msg->msg_name) { - struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name); err = -EINVAL; /* Check address, extract pid. Jean II */ if (msg->msg_namelen < sizeof(*addr)) -- cgit v1.2.1