From: Erez Zadok <ezk@fsl.cs.sunysb.edu>
Date: Sat, 21 May 2011 05:19:59 +0000 (-0400)
Subject: VFS: move BUG_ON test for symlink nd->depth after current->link_count test
X-Git-Tag: v2.6.39.1~126
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=084013b8e040a1414f83e5574d2716019c180a11;p=pandora-kernel.git

VFS: move BUG_ON test for symlink nd->depth after current->link_count test

commit 1a4022f88d40e1255920b017556092ab926d7f66 upstream.

This solves a serious VFS-level bug in nested_symlink (which was
rewritten from do_follow_link), and follows the order of depth tests
that existed before.

The bug triggers a BUG_ON in fs/namei.c:1381, when running racer with
symlink and rename ops.

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Acked-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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