Re: [PATCH] ASoC: SOF: ensure all fields in header are zero'd before copying back to userspace

From: Dan Carpenter
Date: Wed Apr 22 2020 - 07:46:31 EST


On Wed, Apr 22, 2020 at 12:24:17PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> Field header.tlv is uninitialized and being copied back to userspace
^^^^^^^^^^
header.tlv is a zero element array so it doens't have any stack data.

> and hence leaking data from the stack to userspace. Fix this by
> ensuring the header structure is zero'd.

regards,
dan carpenter