From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Tue, 17 Nov 2009 22:40:26 +0000 (-0800)
Subject: debugfs: fix create mutex racy fops and private data
X-Git-Tag: v2.6.27.42~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a3390e41955ec09330821ba7b5231fc5b333453;p=pandora-kernel.git

debugfs: fix create mutex racy fops and private data

commit d3a3b0adad0865c12e39b712ca89efbd0a3a0dbc upstream.

Setting fops and private data outside of the mutex at debugfs file
creation introduces a race where the files can be opened with the wrong
file operations and private data.  It is easy to trigger with a process
waiting on file creation notification.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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