lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Sat, 28 Dec 2013 12:37:38 +0800
From:	Fabian Frederick <fabf@...net.be>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] selftests : Adding symbolic link limits test script

On Fri, 27 Dec 2013 14:38:22 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Wed, 25 Dec 2013 17:23:10 +0100 Fabian Frederick <fabf@...net.be> wrote:
> 
> > This patch adds fs directory in selftests and a script to explain recursive
> > and consecutive symbolic linking limits who have been debated
> > so many times.
> 
> hm, it's a "test" which doesn't really test anything - it always
> succeeds.
> 
> Why do you think the kernel needs this?

Thanks for testing Andrew !

As the script states, first loop is trying 10 recursive links but logically stops at 8.
The second one is trying 50 consecutive links but stops at 40.
Those limits are hardcoded values all over the place in vfs namei.c.
btw people have been asking for global definition, sysctl and so on for
years but nothing has changed AFAICS.

This script tries to show the difference between recursive and consecutive symlinking.
Besides this script could be useful for testing specific FS limitation as well.
If you find it useful, I can add some features to be more self-explanatory ...
If it's still not the case let's forget about it :) 

Fabian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists