linux-kernel - Re: [PATCH 1/1] hfsplus: fix longname handling

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Date:	Tue, 25 Feb 2014 14:16:19 +0400
From:	Vyacheslav Dubeyko <slava@...eyko.com>
To:	sougata santra <sougata@...era.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Joe Perches <joe@...ches.com>, Christoph Hellwig <hch@....de>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] hfsplus: fix longname handling

On Tue, 2014-02-25 at 12:05 +0200, sougata santra wrote:

> 		return err;
> >> +
> >> +	len = be16_to_cpu(key->cat.name.length);
> >>   	key->key_len = cpu_to_be16(6 + 2 * len);
> >
> > I think that maybe it is time to change hardcoded 6 on sensible named
> > constant. What do you think?
> 
> I agree, although I think this should he done in a separate patch. Also 
> there are other instances of hard-coding. We can clean them with a patch. ?
> 

Yes, I think so too. It will be great.

> >   62
> >   63         ustrlen = be16_to_cpu(name->length);
> >
> > I suppose that it makes sense to check name->length here and return
> > error. We can check possible volume corruption here.
> 
> I looked into it while writing the patch. I think this was already 
> handled before. Please see. catalog.c#hfsplus_find_cat the only place it 
> is called.
> 
> {code}
>          if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
>                  pr_err("catalog name length corrupted\n");
>                  return -EIO;
>          }
> {code}
> 

OK. I agree that my suggestion is not necessary.

Thanks,
Vyacheslav Dubeyko.


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