linux-kernel - Probleam reading fdinfo symlinks after 30a08bf2d31d275c6fc71dd1811342777e95c831

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Message-ID: <20120604151407.GD23701@moon>
Date:	Mon, 4 Jun 2012 19:14:07 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	LINUXFS-ML <linux-fsdevel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Eric Biederman <ebiederm@...ssion.com>
Subject: Probleam reading fdinfo symlinks after
 30a08bf2d31d275c6fc71dd1811342777e95c831

Hi Linus,

just tried 3.5-rc1 out and found that with commit
30a08bf2d31d275c6fc71dd1811342777e95c831 the reading
of fdinfo files returns "Too many levels of symbolic links"
error.

 | [root@...tune~]# cat /proc/`pidof crond`/fdinfo/0
 | cat: /proc/1417/fdinfo/0: Too many levels of symbolic links

so I reverted it manually and now it works as expected

 | [root@...tune ~]# cat /proc/`pidof crond`/fdinfo/0
 | pos:	0
 | flags:	0100002

I suspect this is unintentional behaviour of the commit.
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