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| author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 01:51:54 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-01 09:41:05 -0700 |
| commit | dbd99572c687037ca7ddb31df2d7fd364732c670 (patch) | |
| tree | b1bb07420d7803b58fb15b2548a170e611cab07f /net | |
| parent | d3dd6298cdf289b410c030f0d329020cffd85a1d (diff) | |
| download | linux-3.10-dbd99572c687037ca7ddb31df2d7fd364732c670.tar.gz linux-3.10-dbd99572c687037ca7ddb31df2d7fd364732c670.tar.bz2 linux-3.10-dbd99572c687037ca7ddb31df2d7fd364732c670.zip | |
iucv: Fix missing msg_namelen update in iucv_sock_recvmsg()
[ Upstream commit a5598bd9c087dc0efc250a5221e5d0e6f584ee88 ]
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.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '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 cd6f7a991d8..625bc50391c 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1331,6 +1331,8 @@ 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) && |