From 7ab5118d7c2be650bc936894f159dc1c597badae Mon Sep 17 00:00:00 2001 From: Vasiliy Kulikov Date: Thu, 28 Oct 2010 06:31:55 -0600 Subject: [PATCH] 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 contents of kernel stack memory. Signed-off-by: Vasiliy Kulikov Signed-off-by: Jens Axboe --- drivers/block/cciss.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index f09e6df15aa7..13d87a031c88 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, -- 2.20.1