summaryrefslogtreecommitdiff
path: root/security
diff options
context:
space:
mode:
authorCasey Schaufler <casey@schaufler-ca.com>2013-08-05 13:21:22 -0700
committerChanho Park <chanho61.park@samsung.com>2014-11-18 11:46:06 +0900
commit30798177a0b982e02779090013c9f0a16e2cd374 (patch)
tree20d28daba71ef265c5bac110d64366112454f48c /security
parent052694ee35c601ca851828e03ce09f91fee7a372 (diff)
downloadlinux-3.10-30798177a0b982e02779090013c9f0a16e2cd374.tar.gz
linux-3.10-30798177a0b982e02779090013c9f0a16e2cd374.tar.bz2
linux-3.10-30798177a0b982e02779090013c9f0a16e2cd374.zip
Smack: IPv6 casting error fix for 3.11
The original implementation of the Smack IPv6 port based local controls works most of the time using a sockaddr as a temporary variable, but not always as it overflows in some circumstances. The correct data is a sockaddr_in6. A struct sockaddr isn't as large as a struct sockaddr_in6. There would need to be casting one way or the other. This patch gets it the right way. Change-Id: Iac627fa0ddb77e3ff4b8c9c81bd838141a5638e9 Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: James Morris <james.l.morris@oracle.com> Signed-off-by: Ɓukasz Stelmach <l.stelmach@samsung.com>
Diffstat (limited to 'security')
-rw-r--r--security/smack/smack_lsm.c24
1 files changed, 11 insertions, 13 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 19de5e23768..8825375cc03 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1995,12 +1995,11 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
*
* Create or update the port list entry
*/
-static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
+static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
int act)
{
__be16 *bep;
__be32 *be32p;
- struct sockaddr_in6 *addr6;
struct smk_port_label *spp;
struct socket_smack *ssp = sk->sk_security;
struct smack_known *skp;
@@ -2022,10 +2021,9 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
/*
* Get the IP address and port from the address.
*/
- addr6 = (struct sockaddr_in6 *)address;
- port = ntohs(addr6->sin6_port);
- bep = (__be16 *)(&addr6->sin6_addr);
- be32p = (__be32 *)(&addr6->sin6_addr);
+ port = ntohs(address->sin6_port);
+ bep = (__be16 *)(&address->sin6_addr);
+ be32p = (__be32 *)(&address->sin6_addr);
/*
* It's remote, so port lookup does no good.
@@ -2057,9 +2055,9 @@ auditout:
ad.a.u.net->family = sk->sk_family;
ad.a.u.net->dport = port;
if (act == SMK_RECEIVING)
- ad.a.u.net->v6info.saddr = addr6->sin6_addr;
+ ad.a.u.net->v6info.saddr = address->sin6_addr;
else
- ad.a.u.net->v6info.daddr = addr6->sin6_addr;
+ ad.a.u.net->v6info.daddr = address->sin6_addr;
#endif
return smk_access(skp, object, MAY_WRITE, &ad);
}
@@ -2198,7 +2196,8 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap,
case PF_INET6:
if (addrlen < sizeof(struct sockaddr_in6))
return -EINVAL;
- rc = smk_ipv6_port_check(sock->sk, sap, SMK_CONNECTING);
+ rc = smk_ipv6_port_check(sock->sk, (struct sockaddr_in6 *)sap,
+ SMK_CONNECTING);
break;
}
return rc;
@@ -3031,7 +3030,7 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
int size)
{
struct sockaddr_in *sip = (struct sockaddr_in *) msg->msg_name;
- struct sockaddr *sap = (struct sockaddr *) msg->msg_name;
+ struct sockaddr_in6 *sap = (struct sockaddr_in6 *) msg->msg_name;
int rc = 0;
/*
@@ -3136,9 +3135,8 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap,
return smack_net_ambient;
}
-static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr *sap)
+static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr_in6 *sip)
{
- struct sockaddr_in6 *sip = (struct sockaddr_in6 *)sap;
u8 nexthdr;
int offset;
int proto = -EINVAL;
@@ -3196,7 +3194,7 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
struct netlbl_lsm_secattr secattr;
struct socket_smack *ssp = sk->sk_security;
struct smack_known *skp;
- struct sockaddr sadd;
+ struct sockaddr_in6 sadd;
int rc = 0;
struct smk_audit_info ad;
#ifdef CONFIG_AUDIT