linux-kernel - Missing patch from stable [1/7]

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Message-ID: <20080608085653.GA6439@1wt.eu>
Date:	Sun, 8 Jun 2008 10:56:53 +0200
From:	Willy Tarreau <w@....eu>
To:	stable@...nel.org
Cc:	linux-kernel@...r.kernel.org, Miklos Szeredi <mszeredi@...e.cz>,
	Michael Halcrow <mhalcrow@...ibm.com>
Subject: Missing patch from stable [1/7]

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 9c3580aa52195699065bc2d7242b1c7e3e6903fa Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@...e.cz>
Date: Tue, 29 Apr 2008 00:59:48 -0700
Subject: ecryptfs: add missing lock around notify_change

Callers of notify_change() need to hold i_mutex.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
Cc: Michael Halcrow <mhalcrow@...ibm.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
---
 fs/ecryptfs/inode.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index a7d5d7d..1623ebf 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -908,7 +908,9 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 	if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
 		ia->ia_valid &= ~ATTR_MODE;
 
+	mutex_lock(&lower_dentry->d_inode->i_mutex);
 	rc = notify_change(lower_dentry, ia);
+	mutex_unlock(&lower_dentry->d_inode->i_mutex);
 out:
 	fsstack_copy_attr_all(inode, lower_inode, NULL);
 	return rc;
-- 
1.5.3.8

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