linux-kernel - Re: [PATCH] erofs: move erofs out of staging

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Date:   Sun, 18 Aug 2019 17:28:43 +0800
From:   Gao Xiang <hsiangkao@....com>
To:     Richard Weinberger <richard@....at>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        devel <devel@...verdev.osuosl.org>,
        linux-erofs <linux-erofs@...ts.ozlabs.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, tytso <tytso@....edu>,
        Pavel Machek <pavel@...x.de>, David Sterba <dsterba@...e.cz>,
        Amir Goldstein <amir73il@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Darrick <darrick.wong@...cle.com>,
        Dave Chinner <david@...morbit.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>, Jan Kara <jack@...e.cz>,
        torvalds <torvalds@...ux-foundation.org>,
        Chao Yu <yuchao0@...wei.com>, Miao Xie <miaoxie@...wei.com>,
        Li Guifu <bluce.liguifu@...wei.com>,
        Fang Wei <fangwei1@...wei.com>,
        Gao Xiang <gaoxiang25@...wei.com>
Subject: Re: [PATCH] erofs: move erofs out of staging

On Sun, Aug 18, 2019 at 11:03:53AM +0200, Richard Weinberger wrote:
> ----- Urspr??ngliche Mail -----
> > I agree with you, but what can we do now is trying our best to fuzz
> > all the fields.
> > 
> > So, what is your opinion about EROFS?
> 
> All I'm saying is that you should not blindly trust the disk.

I completely agree with you, and I'm teaching EROFS to
make the little naughty boy more strong... (we already
have many error handling code, but I think I will teach him
more, yes.)

> 
> Another thing that raises my attention is in superblock_read():
>         memcpy(sbi->volume_name, layout->volume_name,
>                sizeof(layout->volume_name));
> 
> Where do you check whether ->volume_name has a NUL terminator?
> Currently this field has no user, maybe will add a check upon usage.
> But this kind of things makes me wonder.

Yes, I think this is a good point. :)
Since volume_name is not used currently, I will fix it when
it use late.

I will make a note here (or more straightforward, I will fix it
to avoid potential bug now.)

Thanks,
Gao Xiang

> 
> Thanks,
> //richard