From: Mathias Krause <minipli@googlemail.com>
Date: Sun, 7 Apr 2013 01:52:01 +0000 (+0000)
Subject: VSOCK: vmci - fix possible info leak in vmci_transport_dgram_dequeue()
X-Git-Tag: v3.9-rc7~26^2~19^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=680d04e0ba7e926233e3b9cee59125ce181f66ba;p=pandora-kernel.git

VSOCK: vmci - fix possible info leak in vmci_transport_dgram_dequeue()

In case we received no data on the call to skb_recv_datagram(), i.e.
skb->data is NULL, vmci_transport_dgram_dequeue() will return with 0
without updating msg_namelen leading to net/socket.c leaking the local,
uninitialized sockaddr_storage variable to userland -- 128 bytes of
kernel stack memory.

Fix this by moving the already existing msg_namelen assignment a few
lines above.

Cc: Andy King <acking@vmware.com>
Cc: Dmitry Torokhov <dtor@vmware.com>
Cc: George Zhang <georgezhang@vmware.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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