From: Miklos Szeredi <mszeredi@suse.cz>
Date: Sun, 8 Jun 2008 08:56:53 +0000 (+0200)
Subject: ecryptfs: add missing lock around notify_change
X-Git-Tag: v2.6.25.7~41
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2583783370aa26010ca861111b21700a9655d238;p=thirdparty%2Fkernel%2Fstable.git

ecryptfs: add missing lock around notify_change

upstream commit: 9c3580aa52195699065bc2d7242b1c7e3e6903fa

Callers of notify_change() need to hold i_mutex.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index e238611521010..af1b8c599fa55 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;