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

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Message-ID: <bug-60676-13602-zhtxmg3pVa@https.bugzilla.kernel.org/>
Date:	Fri, 02 Aug 2013 00:44:35 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 60676] Stat system call gives permission denied to root for
 links under a sticky bit

https://bugzilla.kernel.org/show_bug.cgi?id=60676

--- Comment #3 from Theodore Tso <tytso@....edu> ---
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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