diff options
| author | Phil Blundell <philb@gnu.org> | 2010-11-24 11:49:19 -0800 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-12-14 23:40:17 +0100 |
| commit | 973a11aa7810c40a80ad064211fa157dd1921b37 (patch) | |
| tree | 0310f333b85aa18953e2b6fd45dcd2e526c734f0 | |
| parent | 474a751770cdae97c5baa16c4dc2f0e94d0a464f (diff) | |
econet: disallow NULL remote addr for sendmsg(), fixes CVE-2010-3849
commit fa0e846494792e722d817b9d3d625a4ef4896c96 upstream.
Later parts of econet_sendmsg() rely on saddr != NULL, so return early
with EINVAL if NULL was passed otherwise an oops may occur.
Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| -rw-r--r-- | net/econet/af_econet.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c index 2a5a8053e000..8170acbe280d 100644 --- a/net/econet/af_econet.c +++ b/net/econet/af_econet.c @@ -297,23 +297,14 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, mutex_lock(&econet_mutex); - if (saddr == NULL) { - struct econet_sock *eo = ec_sk(sk); - - addr.station = eo->station; - addr.net = eo->net; - port = eo->port; - cb = eo->cb; - } else { - if (msg->msg_namelen < sizeof(struct sockaddr_ec)) { - mutex_unlock(&econet_mutex); - return -EINVAL; - } - addr.station = saddr->addr.station; - addr.net = saddr->addr.net; - port = saddr->port; - cb = saddr->cb; - } + if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) { + mutex_unlock(&econet_mutex); + return -EINVAL; + } + addr.station = saddr->addr.station; + addr.net = saddr->addr.net; + port = saddr->port; + cb = saddr->cb; /* Look for a device with the right network number. */ dev = net2dev_map[addr.net]; @@ -351,7 +342,6 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, eb = (struct ec_cb *)&skb->cb; - /* BUG: saddr may be NULL */ eb->cookie = saddr->cookie; eb->sec = *saddr; eb->sent = ec_tx_done; |