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From: Jonathan Nieder <jrnieder@gmail.com>
To: Stefan Beller <sbeller@google.com>
Cc: Brandon Williams <bmwill@google.com>, Jeff King <peff@peff.net>,
	git <git@vger.kernel.org>
Subject: Re: [PATCH 2/2] submodule: munge paths to submodule git directories
Date: Tue, 14 Aug 2018 14:12:11 -0700
Message-ID: <20180814211211.GF142615@aiede.svl.corp.google.com> (raw)
In-Reply-To: <CAGZ79kZUq5jPqyb=B1ppEi1QhNGmhLXeV6vPn8ouR=YGEN32pg@mail.gmail.com>

Hi,

Stefan Beller wrote:
> On Tue, Aug 14, 2018 at 11:57 AM Jonathan Nieder <jrnieder@gmail.com> wrote:

>> Second, what if we store the pathname in config?  We already store the
>> URL there:
>>
>>         [submodule "plugins/hooks"]
>>                 url = https://gerrit.googlesource.com/plugins/hooks
>>
>> So we could (as a followup patch) do something like
>>
>>         [submodule "plugins/hooks"]
>>                 url = https://gerrit.googlesource.com/plugins/hooks
>>                 gitdirname = plugins%2fhooks
>>
>> and use that for lookups instead of regenerating the directory name.
>> What do you think?
>
> As I just looked at worktree code, this sounds intriguing for the wrong
> reason (again), as a user may want to point the gitdirname to a repository
> that they have already on disk outside the actual superproject. They
> would be reinventing worktrees in the submodule space. ;-)
>
> This would open up the security hole that we just had, again.
> So we'd have to make sure that the gitdirname (instead of the
> now meaningless subsection name) is proof to ../ attacks.
>
> I feel uneasy about this as then the user might come in
> and move submodules and repoint the gitdirname...
> to a not url encoded path. Exposing this knob just
> asks for trouble, no?

What if we forbid directory separator characters in the gitdirname?

[...]
> What would happen if gitdirname is changed as part of
> history? (The same problem we have now with changing
> the subsection name)

In this proposal, it would only be read from config, not from
.gitmodules.

Thanks,
Jonathan

  reply index

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-07 23:06 [RFC] " Brandon Williams
2018-08-07 23:25 ` Jonathan Nieder
2018-08-08  0:14 ` Junio C Hamano
2018-08-08 22:33 ` [PATCH 0/2] munge submodule names Brandon Williams
2018-08-08 22:33   ` [PATCH 1/2] submodule: create helper to build paths to submodule gitdirs Brandon Williams
2018-08-08 23:21     ` Stefan Beller
2018-08-09  0:45       ` Brandon Williams
2018-08-10 21:27     ` Junio C Hamano
2018-08-10 21:45       ` Brandon Williams
2018-08-08 22:33   ` [PATCH 2/2] submodule: munge paths to submodule git directories Brandon Williams
2018-08-09 21:26     ` Jeff King
2018-08-14 18:04       ` Brandon Williams
2018-08-14 18:57         ` Jonathan Nieder
2018-08-14 21:08           ` Stefan Beller
2018-08-14 21:12             ` Jonathan Nieder [this message]
2018-08-14 22:34               ` Stefan Beller
2018-08-16  2:34                 ` Jonathan Nieder
2018-08-16  2:39                   ` Stefan Beller
2018-08-16  2:47                     ` Jonathan Nieder
2018-08-16 17:34                       ` Brandon Williams
2018-08-16 18:19                       ` [PATCH] submodule: add config for where gitdirs are located Brandon Williams
2018-08-20 22:03                         ` Junio C Hamano
2018-08-16 15:07                   ` [PATCH 2/2] submodule: munge paths to submodule git directories Junio C Hamano
2018-08-14 18:58         ` Jeff King
2018-08-28 21:35         ` Stefan Beller
2018-08-29  5:25           ` Jeff King
2018-08-29 18:10             ` Stefan Beller
2018-08-29 21:03               ` Jeff King
2018-08-29 21:10                 ` Stefan Beller
2018-08-29 21:18                   ` Jonathan Nieder
2018-08-29 21:27                     ` Stefan Beller
2018-08-29 21:30                   ` Jeff King
2018-08-29 21:09             ` Jonathan Nieder
2018-08-29 21:14               ` Stefan Beller
2018-08-29 21:25                 ` Brandon Williams
2018-08-29 21:32               ` Jeff King
2018-08-16  0:19     ` Aaron Schrab
2019-01-15  1:25 ` [RFC] " Jonathan Nieder
2019-01-17 17:32   ` Jeff King
2019-01-17 17:57     ` Stefan Beller

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