[PATCH] mtd: properly check all write ioctls for permissions

[Richard Weinberger]

On Thu, Jul 23, 2020 at 1:19 PM Greg Kroah-Hartman
<gregkh at linuxfoundation.org> wrote:
>
> On Thu, Jul 16, 2020 at 01:53:46PM +0200, Greg Kroah-Hartman wrote:
> > When doing a "write" ioctl call, properly check that we have permissions
> > to do so before copying anything from userspace or anything else so we
> > can "fail fast".  This includes also covering the MEMWRITE ioctl which
> > previously missed checking for this.
> >
> > Cc: Miquel Raynal <miquel.raynal at bootlin.com>
> > Cc: Richard Weinberger <richard at nod.at>
> > Cc: Vignesh Raghavendra <vigneshr at ti.com>
> > Cc: stable <stable at kernel.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> > ---
> >  drivers/mtd/mtdchar.c | 54 +++++++++++++++++++++++++++++++++++--------
> >  1 file changed, 45 insertions(+), 9 deletions(-)
>
> Any objection to this patch getting into 5.8-final?

Well, I hoped to get some acks/reviews...

Applied to mtd/fixes! :-)

-- 
Thanks,
//richard