diff options
| author | Phil Blundell <philb@gnu.org> | 2010-11-24 11:49:19 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-12-09 13:24:21 -0800 |
| commit | b13ca1096cc1e5563fbf551d4ffb27798e0d731e (patch) | |
| tree | 31c94a5d6bb43361fa3e50fa990d6577030a162f | |
| parent | 1ee97ce543460d963911ca8d0b8461ba7b48846d (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>
| -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 9aae86ff25a4..2b6c4dc29acf 100644 --- a/net/econet/af_econet.c +++ b/net/econet/af_econet.c @@ -296,23 +296,14 @@ 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]; @@ -350,7 +341,6 @@ 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; |