linux-kernel - Re: [PATCH] mtd: require write permissions for locking and badblock ioctls

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Message-Id: <20210328172836.10072-1-miquel.raynal@bootlin.com>
Date:   Sun, 28 Mar 2021 19:28:36 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Michael Walle <michael@...le.cc>, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] mtd: require write permissions for locking and badblock ioctls

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@...le.cc>
> Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Acked-by: Rafał Miłecki <rafal@...ecki.pl>
> Acked-by: Richard Weinberger <richard@....at>

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

Miquel