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-ZFF2nCjOZw@https.bugzilla.kernel.org/>
Date:	Thu, 01 Aug 2013 18:19:08 +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 #2 from James Kolb <jck@...ek.com> ---
The stat command (stat(1)) works on the link itself (but you can't go further
down the filesystem hierarchy).

So, in my previous example, calling "stat /tmp/testlink" and "stat
/tmp/testdir/testfile" both work, but "stat /tmp/testlink/testfile" gives a
permission error if you are root:
> stat: cannot stat `/tmp/testlink/testfile': Permission denied

The glibc stat function (stat(2)) does not even work on the link itself.

I'm not using SELinux.

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