Merge branch 'master' into for_paulus

[linux-drm-fsl-dcu.git] / fs / ext2 / dir.c

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 92ea8265d7d5248e046954369da84b86bb858753..e89bfc8cf957f73ae8de1682482464efcb7672ae 100644 (file)
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -248,7 +248,7 @@ static int
 ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
 {
        loff_t pos = filp->f_pos;
-       struct inode *inode = filp->f_dentry->d_inode;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        struct super_block *sb = inode->i_sb;
        unsigned int offset = pos & ~PAGE_CACHE_MASK;
        unsigned long n = pos >> PAGE_CACHE_SHIFT;
@@ -368,6 +368,14 @@ struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir,
                }
                if (++n >= npages)
                        n = 0;
+               /* next page is past the blocks we've got */
+               if (unlikely(n > (dir->i_blocks >> (PAGE_CACHE_SHIFT - 9)))) {
+                       ext2_error(dir->i_sb, __FUNCTION__,
+                               "dir %lu size %lld exceeds block count %llu",
+                               dir->i_ino, dir->i_size,
+                               (unsigned long long)dir->i_blocks);
+                       goto out;
+               }
        } while (n != start);
 out:
        return NULL;
@@ -661,5 +669,8 @@ const struct file_operations ext2_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = ext2_readdir,
        .ioctl          = ext2_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = ext2_compat_ioctl,
+#endif
        .fsync          = ext2_sync_file,
 };