linux-kernel - [PATCH 3.2 86/87] Staging: bcm: info leak in ioctl

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Message-ID: <lsq.1385387069.386370769@decadent.org.uk>
Date:	Mon, 25 Nov 2013 13:44:29 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Nico Golde" <nico@...lde.de>,
	"Fabian Yamaguchi" <fabs@...sec.de>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Dan Carpenter" <dan.carpenter@...cle.com>
Subject: [PATCH 3.2 86/87] Staging: bcm: info leak in ioctl

3.2.53-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 8d1e72250c847fa96498ec029891de4dc638a5ba upstream.

The DevInfo.u32Reserved[] array isn't initialized so it leaks kernel
information to user space.

Reported-by: Nico Golde <nico@...lde.de>
Reported-by: Fabian Yamaguchi <fabs@...sec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/staging/bcm/Bcmchar.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/staging/bcm/Bcmchar.c
+++ b/drivers/staging/bcm/Bcmchar.c
@@ -1932,6 +1932,7 @@ cntrlEnd:
 
 		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, OSAL_DBG, DBG_LVL_ALL, "Called IOCTL_BCM_GET_DEVICE_DRIVER_INFO\n");
 
+		memset(&DevInfo, 0, sizeof(DevInfo));
 		DevInfo.MaxRDMBufferSize = BUFFER_4K;
 		DevInfo.u32DSDStartOffset = EEPROM_CALPARAM_START;
 		DevInfo.u32RxAlignmentCorrection = 0;

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