linux-ext4 - Re: [Bug 60676] New: Stat system call gives permission denied to root for links under a sticky bit

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Message-ID: <20130802004426.GF12830@thunk.org>
Date:	Thu, 1 Aug 2013 20:44:26 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	bugzilla-daemon@...zilla.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [Bug 60676] New: Stat system call gives permission denied to
 root for links under a sticky bit

On Thu, Aug 01, 2013 at 11:21:16AM -0700, Christoph Hellwig wrote:
> Try reverting 800179c9b8a1e796e441674776d11cd4c05d61d7

Or just do:

echo 0 > /proc/sys/fs/protected_hardlinks
echo 0 > /proc/sys/fs/protected_symlinks

(or put the equivalent in /etc/sysctl.conf).

There is a **very** detailed description of the design decision behind
this change (which went in as of 3.6) in the commit description.  See:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=800179c9b8a1e796e441674776d11cd4c05d61d7

In any case, it's "working as designed".

						- Ted
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