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Message-ID: <4BB46032.7030500@gmail.com>
Date: Thu, 01 Apr 2010 16:58:26 +0800
From: Changli Gao <xiaosuo@...il.com>
To: "David S. Miller" <davem@...emloft.net>
CC: netdev@...r.kernel.org, xiaosuo <xiaosuo@...il.com>
Subject: [PATCH] net: check the length of the socket address passed to connect(2)
check the length of the socket address passed to connect(2).
Check the length of the socket address passed to connect(2). If the
length is invalid, -EINVAL will be returned.
Signed-off-by: Changli Gao <xiaosuo@...il.com>
----
net/bluetooth/l2cap.c | 3 ++-
net/bluetooth/rfcomm/sock.c | 3 ++-
net/bluetooth/sco.c | 3 ++-
net/can/bcm.c | 3 +++
net/ieee802154/af_ieee802154.c | 3 +++
net/ipv4/af_inet.c | 5 +++++
net/netlink/af_netlink.c | 3 +++
7 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 7794a2e..99d68c3 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1002,7 +1002,8 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int al
BT_DBG("sk %p", sk);
- if (!addr || addr->sa_family != AF_BLUETOOTH)
+ if (!addr || alen < sizeof(addr->sa_family) ||
+ addr->sa_family != AF_BLUETOOTH)
return -EINVAL;
memset(&la, 0, sizeof(la));
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 7f43976..8ed3c37 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -397,7 +397,8 @@ static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int a
BT_DBG("sk %p", sk);
- if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_rc))
+ if (alen < sizeof(struct sockaddr_rc) ||
+ addr->sa_family != AF_BLUETOOTH)
return -EINVAL;
lock_sock(sk);
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index e5b16b7..ca6b2ad 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -499,7 +499,8 @@ static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen
BT_DBG("sk %p", sk);
- if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco))
+ if (alen < sizeof(struct sockaddr_sco) ||
+ addr->sa_family != AF_BLUETOOTH)
return -EINVAL;
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
diff --git a/net/can/bcm.c b/net/can/bcm.c
index a2dee52..907dc87 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1479,6 +1479,9 @@ static int bcm_connect(struct socket *sock, struct sockaddr *uaddr, int len,
struct sock *sk = sock->sk;
struct bcm_sock *bo = bcm_sk(sk);
+ if (len < sizeof(*addr))
+ return -EINVAL;
+
if (bo->bound)
return -EISCONN;
diff --git a/net/ieee802154/af_ieee802154.c b/net/ieee802154/af_ieee802154.c
index 79886d5..c7da600 100644
--- a/net/ieee802154/af_ieee802154.c
+++ b/net/ieee802154/af_ieee802154.c
@@ -127,6 +127,9 @@ static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
{
struct sock *sk = sock->sk;
+ if (addr_len < sizeof(uaddr->sa_family))
+ return -EINVAL;
+
if (uaddr->sa_family == AF_UNSPEC)
return sk->sk_prot->disconnect(sk, flags);
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index be1a6ac..a0beb32 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -531,6 +531,8 @@ int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr,
{
struct sock *sk = sock->sk;
+ if (addr_len < sizeof(uaddr->sa_family))
+ return -EINVAL;
if (uaddr->sa_family == AF_UNSPEC)
return sk->sk_prot->disconnect(sk, flags);
@@ -574,6 +576,9 @@ int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
int err;
long timeo;
+ if (addr_len < sizeof(uaddr->sa_family))
+ return -EINVAL;
+
lock_sock(sk);
if (uaddr->sa_family == AF_UNSPEC) {
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 274d977..6464a19 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -683,6 +683,9 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
struct netlink_sock *nlk = nlk_sk(sk);
struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
+ if (alen < sizeof(addr->sa_family))
+ return -EINVAL;
+
if (addr->sa_family == AF_UNSPEC) {
sk->sk_state = NETLINK_UNCONNECTED;
nlk->dst_pid = 0;
--
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