Re: [PATCH] sound/isa/wavefront: copy userspace array safely

[Takashi Iwai]

On Thu, 02 Nov 2023 20:03:10 +0100,
Philipp Stanner wrote:
> 
> wavefront_fx.c utilizes memdup_user() to copy a userspace array. This
> does not check for an overflow.

There is a check above the memdup_user() call; it's at most 512
bytes.

> Use the new wrapper memdup_array_user() to copy the array more safely.
> 
> Suggested-by: Dave Airlie <airlied@xxxxxxxxxx>
> Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>

Although the check is already present, it's still better to use the
new helper, so I applied the patch now.


thanks,

Takashi