ext4: fail ext4_iget for root directory if unallocated

[pandora-kernel.git] / fs / ext4 / inode.c

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index fde77a7..af268ba 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3902,6 +3902,13 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
        if (ret < 0)
                goto bad_inode;
        raw_inode = ext4_raw_inode(&iloc);
+
+       if ((ino == EXT4_ROOT_INO) && (raw_inode->i_links_count == 0)) {
+               EXT4_ERROR_INODE(inode, "root inode unallocated");
+               ret = -EIO;
+               goto bad_inode;
+       }
+
        inode->i_mode = le16_to_cpu(raw_inode->i_mode);
        inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
        inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);