Merge git://oss.sgi.com:8090/xfs/xfs-2.6

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

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 0b02ba9642d2e817cb908f0ae10a37c6ae8366c4..e89bfc8cf957f73ae8de1682482464efcb7672ae 100644 (file)
--- 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;