linux-kernel - [PATCH 1/2] block: cciss: fix information leak to userland

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Date:	Sat, 23 Oct 2010 12:25:11 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Mike Miller <mike.miller@...com>, Jens Axboe <jaxboe@...ionio.com>,
	"Stephen M. Cameron" <scameron@...rdog.cce.hp.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	iss_storagedev@...com, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] block: cciss: fix information leak to userland

Structure IOCTL_Command_struct is copied to userland with some
padding fields at the end of the struct unitialized.
It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@...il.com>
---
 drivers/block/cciss.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 762a81a..cd08324 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1142,6 +1142,7 @@ static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
 	int err;
 	u32 cp;
 
+	memset(&arg64, 0, sizeof(arg64));
 	err = 0;
 	err |=
 	    copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
-- 
1.7.0.4

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