linux-kernel - Re: [PATCH v3] mtd: Fix gluebi NULL pointer dereference caused by ftl notifier

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Message-ID: <20231029145033.0ad2682a@xps-13>
Date:   Sun, 29 Oct 2023 14:50:33 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Richard Weinberger <richard@....at>
Cc:     ZhaoLong Wang <wangzhaolong1@...wei.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Artem Bityutskiy <Artem.Bityutskiy@...ia.com>,
        dpervushin <dpervushin@...eddedalley.com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        chengzhihao1 <chengzhihao1@...wei.com>,
        yi zhang <yi.zhang@...wei.com>,
        yangerkun <yangerkun@...wei.com>
Subject: Re: [PATCH v3] mtd: Fix gluebi NULL pointer dereference caused by
 ftl notifier

Hi Richard,

richard@....at wrote on Fri, 27 Oct 2023 22:30:10 +0200 (CEST):

> ----- Ursprüngliche Mail -----
> > Von: "Miquel Raynal" <miquel.raynal@...tlin.com>  
> >> Detailed reproduction information available at the link[1],
> >> 
> >> The solution for the gluebi module is to run jffs2 on the UBI
> >> volume without considering working with ftl or mtdblock.[2].  
> > 
> > I am sorry but ftl, gluebi, mtdblock, jffs2 and ubi in the same report
> > seem a little bit fuzzy. Are you sure about this sentence?  
> 
> ZhaoLong Wang found an interesting bug while stacking various MTD components.
> I suggested to just deny mtdblock on top of gluebi to avoid the whole
> problem class instead of adding more duct tape.

Ack. I'll queue this once the log fixed and your official Ack-by
received for mtd/next after -rc1 is out.

Thanks,
Miquèl

> 
> Thanks,
> //richard
> 
> The issue reminds me of one of my favorite Monty Python sketches, https://www.youtube.com/watch?v=LFrdqQZ8FFc
> ;-)

:-)