From: Mathias Krause <minipli@googlemail.com>
Date: Wed, 15 Aug 2012 11:31:45 +0000 (+0000)
Subject: atm: fix info leak via getsockname()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3c0c5cfdcd4d69ffc4b9c0907cec99039f30a50a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

atm: fix info leak via getsockname()

The ATM code fails to initialize the two padding bytes of struct
sockaddr_atmpvc inserted for alignment. Add an explicit memset(0)
before filling the structure to avoid the info leak.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/atm/pvc.c b/net/atm/pvc.c
index 3a734919c36c..ae0324021407 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -95,6 +95,7 @@ static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
 		return -ENOTCONN;
 	*sockaddr_len = sizeof(struct sockaddr_atmpvc);
 	addr = (struct sockaddr_atmpvc *)sockaddr;
+	memset(addr, 0, sizeof(*addr));
 	addr->sap_family = AF_ATMPVC;
 	addr->sap_addr.itf = vcc->dev->number;
 	addr->sap_addr.vpi = vcc->vpi;