[14/90] ext4: Limit number of links that can be created by ext4_link()

Greg KH
2009-12-11T04:36:24Z

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2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------
(cherry picked from commit b05ab1dc3795e6f997fb0d34f38fce5012533c3e)

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>
---
fs/ext4/namei.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2310,7 +2310,7 @@ static int ext4_link(struct dentry *old_
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;

/*