diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 01:51:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-07 16:28:01 -0400 |
| commit | 2d6fbfe733f35c6b355c216644e08e149c61b271 (patch) | |
| tree | b68553f2ddc2564bf17b4e28c1c7ee363dd40517 /net/caif | |
| parent | c8c499175f7d295ef867335bceb9a76a2c3cdc38 (diff) | |
| download | lwn-2d6fbfe733f35c6b355c216644e08e149c61b271.tar.gz lwn-2d6fbfe733f35c6b355c216644e08e149c61b271.zip | |
caif: Fix missing msg_namelen update in caif_seqpkt_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 caif_seqpkt_recvmsg() not filling the msg_name in case it was
set.
Cc: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/caif')
| -rw-r--r-- | net/caif/caif_socket.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c index 095259f83902..ff2ff3ce6965 100644 --- a/net/caif/caif_socket.c +++ b/net/caif/caif_socket.c @@ -286,6 +286,8 @@ static int caif_seqpkt_recvmsg(struct kiocb *iocb, struct socket *sock, if (m->msg_flags&MSG_OOB) goto read_error; + m->msg_namelen = 0; + skb = skb_recv_datagram(sk, flags, 0 , &ret); if (!skb) goto read_error; |