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

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Date:   Mon, 22 Mar 2021 18:54:12 +0100 (CET)
From:   Richard Weinberger <richard@....at>
To:     Rafał Miłecki <zajec5@...il.com>
Cc:     Michael Walle <michael@...le.cc>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] mtd: require write permissions for locking and badblock
 ioctls

----- Ursprüngliche Mail -----
> Von: "Rafał Miłecki" <zajec5@...il.com>
> An: "Michael Walle" <michael@...le.cc>, "linux-mtd" <linux-mtd@...ts.infradead.org>, "linux-kernel"
> <linux-kernel@...r.kernel.org>
> CC: "Miquel Raynal" <miquel.raynal@...tlin.com>, "richard" <richard@....at>, "Vignesh Raghavendra" <vigneshr@...com>,
> "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
> Gesendet: Montag, 22. März 2021 17:39:41
> Betreff: Re: [PATCH] mtd: require write permissions for locking and badblock ioctls

> On 03.03.2021 16:57, 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>
> 
> Should be fine for OpenWrt tools to my best knowledge (and quick testing).
> 
> Acked-by: Rafał Miłecki <rafal@...ecki.pl>

Nice!

Acked-by: Richard Weinberger <richard@....at>

Thanks,
//richard