linux-kernel - [patch] ecryptfs: add missing lock around notify

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Message-Id: <E1Jh6Jy-0006Me-Bo@pomaz-ex.szeredi.hu>
Date:	Wed, 02 Apr 2008 19:00:22 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	mhalcrow@...ibm.com
CC:	akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [patch] ecryptfs: add missing lock around notify_change

From: Miklos Szeredi <mszeredi@...e.cz>

Caller of notify_change() need to hold i_mutex.

Compile tested only.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
 fs/ecryptfs/inode.c |    2 ++
 1 file changed, 2 insertions(+)

Index: vfs-2.6/fs/ecryptfs/inode.c
===================================================================
--- vfs-2.6.orig/fs/ecryptfs/inode.c	2008-04-02 18:47:17.000000000 +0200
+++ vfs-2.6/fs/ecryptfs/inode.c	2008-04-02 18:49:18.000000000 +0200
@@ -908,7 +908,9 @@ static int ecryptfs_setattr(struct dentr
 	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;
--
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