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Date: Wed, 28 Mar 2018 10:32:04 +0200
From: Boris Brezillon <boris.brezillon@bootlin.com>
To: Richard Weinberger <richard@nod.at>
Cc: Olivier Schonken <olivier.schonken@gmail.com>, David Woodhouse
 <dwmw2@infradead.org>, Brian Norris <computersforpeace@gmail.com>,
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Subject: Re: Atmel Nand PMECC UBI ECC issue
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On Tue, 27 Mar 2018 16:08:46 +0200
Richard Weinberger <richard@nod.at> wrote:

> Oliver,
>=20
> Am Dienstag, 27. M=C3=A4rz 2018, 10:28:52 CEST schrieb Olivier Schonken:
> > Hi Richard
> >=20
> > The bytes in question is at offset 36c90. =20
>=20
> Okay. At this offset we have a UBIFS data node of length 1477.
> One bit of the UBIFS magic changed. 0x30 instead of 0x31
> Fun fact, the UBIFS CRC32 is correct. UBIFS magic and the CRC32 are not=20
> covered by the CRC.
> So, really just one bit changed, in the magic.

Looks like this problem was caused by a bug in the atmel NFC driver.
Fix is available here [1].

Regards,

Boris

[1]http://patchwork.ozlabs.org/patch/891725/
--=20
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com