From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Tue, 9 Apr 2013 02:07:19 +0000 (+0800)
Subject: netrom: fix invalid use of sizeof in nr_recvmsg()
X-Git-Tag: v3.4.43~18
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7b806e764b487cf1f348d1e4377f99853935ff7c;p=karo-tx-linux.git

netrom: fix invalid use of sizeof in nr_recvmsg()

[ Upstream commit c802d759623acbd6e1ee9fbdabae89159a513913 ]

sizeof() when applied to a pointer typed expression gives the size of the
pointer, not that of the pointed data.
Introduced by commit 3ce5ef(netrom: fix info leak via msg_name in nr_recvmsg)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 72cad6cbcbce..7ed9b1d0c102 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1177,7 +1177,7 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
 	}
 
 	if (sax != NULL) {
-		memset(sax, 0, sizeof(sax));
+		memset(sax, 0, sizeof(*sax));
 		sax->sax25_family = AF_NETROM;
 		skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
 			      AX25_ADDR_LEN);