linux-kernel - [PATCH] scsi: hpsa: fix information leak to userland

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Message-Id: <1288194054-9276-1-git-send-email-segooon@gmail.com>
Date:	Wed, 27 Oct 2010 19:40:54 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	"Stephen M. Cameron" <scameron@...rdog.cce.hp.com>,
	"James E.J. Bottomley" <James.Bottomley@...e.de>,
	Mike Miller <mike.miller@...com>, iss_storagedev@...com,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: hpsa: 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 contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@...il.com>
---
 Compile tested.

 drivers/scsi/hpsa.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index c5d0606..641a38c 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2298,6 +2298,7 @@ static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
 	int err;
 	u32 cp;
 
+	memset(&arg64, 0, sizeof(arg64));
 	err = 0;
 	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
 			   sizeof(arg64.LUN_info));
@@ -2334,6 +2335,7 @@ static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
 	int err;
 	u32 cp;
 
+	memset(&arg64, 0, sizeof(arg64));
 	err = 0;
 	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
 			   sizeof(arg64.LUN_info));
-- 
1.7.0.4

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