Commit 7ab5118d authored Oct 28, 2010 by Vasiliy Kulikov Committed by Jens Axboe Oct 28, 2010

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 <segooon@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

parent 027b180d

drivers/block/cciss.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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,