netdev - [patch] qlcnic: info leak in qlcnic_dcb_peer_app

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Message-ID: <20140523163721.GA14067@mwanda>
Date:	Fri, 23 May 2014 19:37:21 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Shahed Shaikh <shahed.shaikh@...gic.com>,
	Sucheta Chakraborty <sucheta.chakraborty@...gic.com>
Cc:	Dept-HSGLinuxNICDev@...gic.com, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] qlcnic: info leak in qlcnic_dcb_peer_app_info()

This function is called from dcbnl_build_peer_app().  The "info"
struct isn't initialized at all so we disclose 2 bytes of uninitialized
stack data.  We should clear it before passing it to the user.

Fixes: 48365e485275 ('qlcnic: dcb: Add support for CEE Netlink interface.')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
This is a static analysis patch, and I am not familiar with this code.
We may want to put some useful information here, to go with the
app_count.

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.c
index a51fe18..561cb11 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.c
@@ -1020,6 +1020,7 @@ static int qlcnic_dcb_peer_app_info(struct net_device *netdev,
 	struct qlcnic_dcb_cee *peer;
 	int i;
 
+	memset(info, 0, sizeof(*info));
 	*app_count = 0;
 
 	if (!test_bit(QLCNIC_DCB_STATE, &adapter->dcb->state))
--
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