From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 30 Aug 2009 01:08:08 +0000 (-0400)
Subject: ext4: Limit number of links that can be created by ext4_link()
X-Git-Tag: v2.6.32-rc1~633^2~34
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b05ab1dc3795e6f997fb0d34f38fce5012533c3e;p=karo-tx-linux.git

ext4: Limit number of links that can be created by ext4_link()

In ext4_link we need to check using EXT4_LINK_MAX, and not
EXT4_DIR_LINK_MAX(), since ext4_link() is creating hard links of
regular files, and not directories.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index ba91bd0f7916..f27c8164c1fe 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2318,7 +2318,7 @@ static int ext4_link(struct dentry *old_dentry,
 	struct inode *inode = old_dentry->d_inode;
 	int err, retries = 0;
 
-	if (EXT4_DIR_LINK_MAX(inode))
+	if (inode->i_nlink >= EXT4_LINK_MAX)
 		return -EMLINK;
 
 	/*