[PATCH] mtd: require write permissions for locking and badblock ioctls

[Miquel Raynal]

On Wed, 2021-03-03 at 15:57:35 UTC, Michael Walle wrote:
> MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require
> write permission. Depending on the hardware MEMLOCK might even be
> write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK
> is always write-once.
> 
> MEMSETBADBLOCK modifies the bad block table.
> 
> Fixes: f7e6b19bc764 ("mtd: properly check all write ioctls for permissions")
> Signed-off-by: Michael Walle <michael at walle.cc>
> Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> Acked-by: Rafał Miłecki <rafal at milecki.pl>
> Acked-by: Richard Weinberger <richard at nod.at>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.

Miquel