linux-kernel - [patch v2] gru: info leak in gru_get_config

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Message-ID: <20130421170107.GA16118@elgon.mountain>
Date:	Sun, 21 Apr 2013 20:01:07 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Dimitri Sivanich <sivanich@....com>
Cc:	Robin Holt <holt@....com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, walter harms <wharms@....de>
Subject: [patch v2] gru: info leak in gru_get_config_info()

The "info.fill" array isn't initialized so it can leak uninitialized
stack information to user space.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
v2: style changes

diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index 44d273c..0535d1e 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -172,6 +172,7 @@ static long gru_get_config_info(unsigned long arg)
 		nodesperblade = 2;
 	else
 		nodesperblade = 1;
+	memset(&info, 0, sizeof(info));
 	info.cpus = num_online_cpus();
 	info.nodes = num_online_nodes();
 	info.blades = info.nodes / nodesperblade;
--
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