Missing patch from stable [2/7]

[Willy Tarreau <w@1wt.eu>]

Hi,

this patch from mainline seems suitable for -stable, but was not proposed
for inclusion. I think we should include it for next review unless the
author disagrees.

Thanks,
Willy
--

>From 2f9b12a31fcb738ea8c9eb0d4ddf906c6f1d696c Mon Sep 17 00:00:00 2001
From: Michael Halcrow <mhalcrow@us.ibm.com>
Date: Tue, 29 Apr 2008 00:59:52 -0700
Subject: eCryptfs: protect crypt_stat->flags in ecryptfs_open()

Make sure crypt_stat->flags is protected with a lock in ecryptfs_open().

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/ecryptfs/file.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 2b8f5ed..2258b8f 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -195,7 +195,9 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
 		file, ecryptfs_inode_to_private(inode)->lower_file);
 	if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
 		ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
+		mutex_lock(&crypt_stat->cs_mutex);
 		crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
+		mutex_unlock(&crypt_stat->cs_mutex);
 		rc = 0;
 		goto out;
 	}
-- 
1.5.3.8