From f717ce63608c9f914487ba4c5cf27ca3549fa9df Mon Sep 17 00:00:00 2001
From: Andreas Dilger <adilger@dilger.ca>
Date: Mon, 28 May 2012 17:02:25 -0400
Subject: [PATCH] --- yaml --- r: 309959 b: refs/heads/master c:
 7e936b737211e6b54e34b71a827e56b872e958d8 h: refs/heads/master i:   309957:
 1e35c465742522fe66b514ca2865b5eca32e479f   309955:
 1a3fe9a08119175098d8d6c20254ba3acd88ffc2   309951:
 57ddf73a6a7097cb70a56fa009c7f9cbce0df5d1 v: v3

---
 [refs]                | 2 +-
 trunk/fs/ext4/namei.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index d59539b7d04c..8398ba9eee14 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 967ac8af4475ce45474800709b12137aa7634c77
+refs/heads/master: 7e936b737211e6b54e34b71a827e56b872e958d8
diff --git a/trunk/fs/ext4/namei.c b/trunk/fs/ext4/namei.c
index a9fd5f48f3bf..daf8260f0b03 100644
--- a/trunk/fs/ext4/namei.c
+++ b/trunk/fs/ext4/namei.c
@@ -1330,6 +1330,12 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
 			EXT4_ERROR_INODE(dir, "bad inode number: %u", ino);
 			return ERR_PTR(-EIO);
 		}
+		if (unlikely(ino == dir->i_ino)) {
+			EXT4_ERROR_INODE(dir, "'%.*s' linked to parent dir",
+					 dentry->d_name.len,
+					 dentry->d_name.name);
+			return ERR_PTR(-EIO);
+		}
 		inode = ext4_iget(dir->i_sb, ino);
 		if (inode == ERR_PTR(-ESTALE)) {
 			EXT4_ERROR_INODE(dir,