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| author |   Ursula Braun <braunu@de.ibm.com> | 2008-06-09 15:51:03 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-06-09 15:51:03 -0700 |
| commit | 469689a4dd476c1be6750deea5f59528a17b8b4a (patch) | |
| tree | 1f7d6be604b21fa0054c219608f694edb7ae982c | |
| parent | iucv: prevent cpu hotplug when walking cpu_online_map. (diff) | |
| download | linux-dev-469689a4dd476c1be6750deea5f59528a17b8b4a.tar.xz linux-dev-469689a4dd476c1be6750deea5f59528a17b8b4a.zip | |
af_iucv: exploit target message class support of IUCV
The first 4 bytes of data to be sent are stored additionally into
the message class field of the send request. A receiving target
program (not an af_iucv socket program) can make use of this
information to pre-screen incoming messages.
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/iucv/af_iucv.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index 7b0038f45b16..58e4aee3e696 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -644,6 +644,7 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, } txmsg.class = 0; + memcpy(&txmsg.class, skb->data, skb->len >= 4 ? 4 : skb->len); txmsg.tag = iucv->send_tag++; memcpy(skb->cb, &txmsg.tag, 4); skb_queue_tail(&iucv->send_skb_q, skb); |