From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vasiliy Kulikov Date: Sat, 23 Oct 2010 08:25:11 +0000 Subject: [PATCH 1/2] block: cciss: fix information leak to userland Message-Id: <1287822311-14783-1-git-send-email-segooon@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kernel-janitors@vger.kernel.org Cc: Mike Miller , Jens Axboe , "Stephen M. Cameron" , Andrew Morton , iss_storagedev@hp.com, linux-kernel@vger.kernel.org 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 --- 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