From: Miklos Szeredi <mszeredi@suse.cz>

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>
---

 fs/ecryptfs/inode.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN fs/ecryptfs/inode.c~ecryptfs-add-missing-lock-around-notify_change fs/ecryptfs/inode.c
--- a/fs/ecryptfs/inode.c~ecryptfs-add-missing-lock-around-notify_change
+++ a/fs/ecryptfs/inode.c
@@ -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);
 	return rc;
_