From: Vasiliy Kulikov <segooon@gmail.com>
To: kernel-janitors@vger.kernel.org
Cc: Mike Miller <mike.miller@hp.com>,
Jens Axboe <jaxboe@fusionio.com>,
"Stephen M. Cameron" <scameron@beardog.cce.hp.com>,
Andrew Morton <akpm@linux-foundation.org>,
iss_storagedev@hp.com, linux-kernel@vger.kernel.org
Subject: [PATCH] block: cciss: fix information leak to userland
Date: Wed, 27 Oct 2010 19:40:48 +0400 [thread overview]
Message-ID: <1288194048-9233-1-git-send-email-segooon@gmail.com> (raw)
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@gmail.com>
---
Compile tested.
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 f09e6df..13d87a0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1184,6 +1184,7 @@ static int cciss_ioctl32_big_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
next reply other threads:[~2010-10-27 15:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-27 15:40 Vasiliy Kulikov [this message]
2010-10-28 12:32 ` [PATCH] block: cciss: fix information leak to userland Jens Axboe
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