diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 05:51:54 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-08 00:28:01 +0400 |
| commit | a5598bd9c087dc0efc250a5221e5d0e6f584ee88 (patch) | |
| tree | ac7da3efc4748e0a2efb8e27aad0b4aae58e2c2e | |
| parent | 5ae94c0d2f0bed41d6718be743985d61b7f5c47d (diff) | |
| download | linux-a5598bd9c087dc0efc250a5221e5d0e6f584ee88.tar.xz | |
iucv: Fix missing msg_namelen update in iucv_sock_recvmsg()
The current code does not fill the msg_name member in case it is set.
It also does not set the msg_namelen member to 0 and therefore makes
net/socket.c leak the local, uninitialized sockaddr_storage variable
to userland -- 128 bytes of kernel stack memory.
Fix that by simply setting msg_namelen to 0 as obviously nobody cared
about iucv_sock_recvmsg() not filling the msg_name in case it was set.
Cc: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/iucv/af_iucv.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index a7d11ffe4284..bf6935820001 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1328,6 +1328,8 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct sk_buff *skb, *rskb, *cskb; int err = 0; + msg->msg_namelen = 0; + if ((sk->sk_state == IUCV_DISCONN) && skb_queue_empty(&iucv->backlog_skb_q) && skb_queue_empty(&sk->sk_receive_queue) && |