linux-kernel - [ 17/34] netrom: fix invalid use of sizeof in nr

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Message-Id: <20130429184702.839338907@linuxfoundation.org>
Date:	Mon, 29 Apr 2013 12:02:24 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 17/34] netrom: fix invalid use of sizeof in nr_recvmsg()

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

[ 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@...ndmicro.com.cn>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/netrom/af_netrom.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1177,7 +1177,7 @@ static int nr_recvmsg(struct kiocb *iocb
 	}
 
 	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);


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