1 files changed, 8 insertions, 0 deletions

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 0b02ba9642d..e89bfc8cf95 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -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;